FlutterError: Unable to load asset

I have the same issue. I've just run "$ flutter clean", then everything is OK.

TypeError: Object of type 'bytes' is not JSON serializable

You are creating those bytes objects yourself:

item['title'] = [t.encode('utf-8') for t in title]
item['link'] = [l.encode('utf-8') for l in link]
item['desc'] = [d.encode('utf-8') for d in desc]
items.append(item)

Each of those t.encode(), l.encode() and d.encode() calls creates a bytes string. Do not do this, leave it to the JSON format to serialise these.

Next, you are making several other errors; you are encoding too much where there is no need to. Leave it to the json module and the standard file object returned by the open() call to handle encoding.

You also don't need to convert your items list to a dictionary; it'll already be an object that can be JSON encoded directly:

class W3SchoolPipeline(object):    
    def __init__(self):
        self.file = open('w3school_data_utf8.json', 'w', encoding='utf-8')

    def process_item(self, item, spider):
        line = json.dumps(item) + '\n'
        self.file.write(line)
        return item

I'm guessing you followed a tutorial that assumed Python 2, you are using Python 3 instead. I strongly suggest you find a different tutorial; not only is it written for an outdated version of Python, if it is advocating line.decode('unicode_escape') it is teaching some extremely bad habits that'll lead to hard-to-track bugs. I can recommend you look at Think Python, 2nd edition for a good, free, book on learning Python 3.

Load local images in React.js

Instead of use img src="", try to create a div and set background-image as the image you want.

Right now it's working for me.

example:

App.js

import React, { Component } from 'react';
import './App.css';



class App extends Component {

  render() {
    return (
      <div>
        <div className="myImage"> </div>
      </div>
    );
  }
}

export default App;

App.css

.myImage {
  width: 60px;
  height: 60px;
  background-image: url("./icons/add-circle.png");
  background-repeat: no-repeat;
  background-size: 100%;
}

error UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte

I've come across this thread when suffering the same error, after doing some research I can confirm, this is an error that happens when you try to decode a UTF-16 file with UTF-8.

With UTF-16 the first characther (2 bytes in UTF-16) is a Byte Order Mark (BOM), which is used as a decoding hint and doesn't appear as a character in the decoded string. This means the first byte will be either FE or FF and the second, the other.

Heavily edited after I found out the real answer

Vertical Align Center in Bootstrap 4

Because none of the above worked for me, I am adding another answer.

Goal: To vertically and horizontally align a div on a page using bootstrap 4 flexbox classes.

Step 1: Set your outermost div to a height of 100vh. This sets the height to 100% of the Veiwport Height. If you don't do this, nothing else will work. Setting it to a height of 100% is only relative to the parent, so if the parent is not the full height of the viewport, nothing will work. In the example below, I set the Body to 100vh.

Step 2: Set the container div to be the flexbox container with the d-flex class.

Step 3: Center div horizontally with the justify-content-center class.

Step 4: Center div vertically with the align-items-center

Step 5: Run page, view your vertically and horizontally centered div.

Note that there is no special class that needs to be set on the centered div itself (the child div)

<body style="background-color:#f2f2f2; height:100vh;">

<div class="h-100 d-flex justify-content-center align-items-center">
    <div style="height:600px; background-color:white; width:600px;">
</div>

</div>

</body>

How do I get rid of the b-prefix in a string in python?

You need to decode it to convert it to a string. Check the answer here about bytes literal in python3.

In [1]: b'I posted a new photo to Facebook'.decode('utf-8')
Out[1]: 'I posted a new photo to Facebook'

(unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

As per String literals:

String literals can be enclosed within single quotes (i.e. '...') or double quotes (i.e. "..."). They can also be enclosed in matching groups of three single or double quotes (these are generally referred to as triple-quoted strings).

The backslash character (i.e. \) is used to escape characters which otherwise will have a special meaning, such as newline, backslash itself, or the quote character. String literals may optionally be prefixed with a letter r or R. Such strings are called raw strings and use different rules for backslash escape sequences.

In triple-quoted strings, unescaped newlines and quotes are allowed, except that the three unescaped quotes in a row terminate the string.

Unless an r or R prefix is present, escape sequences in strings are interpreted according to rules similar to those used by Standard C.

So ideally you need to replace the line:

data = open("C:\Users\miche\Documents\school\jaar2\MIK\2.6\vektis_agb_zorgverlener")

To any one of the following characters:

Using raw prefix and single quotes (i.e. '...'):

  data = open(r'C:\Users\miche\Documents\school\jaar2\MIK\2.6\vektis_agb_zorgverlener')

Using double quotes (i.e. "...") and escaping backslash character (i.e. \):

  data = open("C:\\Users\\miche\\Documents\\school\\jaar2\\MIK\\2.6\\vektis_agb_zorgverlener")

Using double quotes (i.e. "...") and forwardslash character (i.e. /):

  data = open("C:/Users/miche/Documents/school/jaar2/MIK/2.6/vektis_agb_zorgverlener")

Django - Did you forget to register or load this tag?

did you try this

{% load games_tags %}

at the top instead of pygmentize?

HTML 5 Video "autoplay" not automatically starting in CHROME

Extremeandy has mentioned as of Chrome 66 autoplay video has been disabled.

After looking into this I found that muted videos are still able to be autoplayed. In my case the video didn't have any audio, but adding muted to the video tag has fixed it:

Hopefully this will help others also.

Download and save PDF file with Python requests module

In Python 3, I find pathlib is the easiest way to do this. Request's response.content marries up nicely with pathlib's write_bytes.

from pathlib import Path
import requests
filename = Path('metadata.pdf')
url = 'http://www.hrecos.org//images/Data/forweb/HRTVBSH.Metadata.pdf'
response = requests.get(url)
filename.write_bytes(response.content)

Call to undefined function App\Http\Controllers\ [ function name ]

If they are in the same controller class, it would be:

foreach ( $characters as $character) {
    $num += $this->getFactorial($index) * $index;
    $index ++;
}

Otherwise you need to create a new instance of the class, and call the method, ie:

$controller = new MyController();
foreach ( $characters as $character) {
    $num += $controller->getFactorial($index) * $index;
    $index ++;
}

FFMPEG mp4 from http live streaming m3u8 file?

Aergistal's answer works, but I found that converting to mp4 can make some m3u8 videos broken. If you are stuck with this problem, try to convert them to mkv, and convert them to mp4 later.

Significance of ios_base::sync_with_stdio(false); cin.tie(NULL);

It's just common stuff for making cin input work faster.

For a quick explanation: the first line turns off buffer synchronization between the cin stream and C-style stdio tools (like scanf or gets) — so cin works faster, but you can't use it simultaneously with stdio tools.

The second line unties cin from cout — by default the cout buffer flushes each time when you read something from cin. And that may be slow when you repeatedly read something small then write something small many times. So the line turns off this synchronization (by literally tying cin to null instead of cout).

UnicodeEncodeError: 'ascii' codec can't encode character at special name

Try setting the system default encoding as utf-8 at the start of the script, so that all strings are encoded using that.

Example -

import sys
reload(sys)
sys.setdefaultencoding('utf-8')

The above should set the default encoding as utf-8 .

Writing an mp4 video using python opencv

just change the codec to "DIVX". This codec works with all formats.

fourcc = cv2.VideoWriter_fourcc(*'DIVX')

i hope this works for you!

Encoding Error in Panda read_csv

This works in Mac as well you can use

df= pd.read_csv('Region_count.csv', encoding ='latin1')

Deserialize JSON with Jackson into Polymorphic Types - A Complete Example is giving me a compile error

As promised, I'm putting an example for how to use annotations to serialize/deserialize polymorphic objects, I based this example in the Animal class from the tutorial you were reading.

First of all your Animal class with the Json Annotations for the subclasses.

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;

@JsonIgnoreProperties(ignoreUnknown = true)
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY)
@JsonSubTypes({
    @JsonSubTypes.Type(value = Dog.class, name = "Dog"),

    @JsonSubTypes.Type(value = Cat.class, name = "Cat") }
)
public abstract class Animal {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

Then your subclasses, Dog and Cat.

public class Dog extends Animal {

    private String breed;

    public Dog() {

    }

    public Dog(String name, String breed) {
        setName(name);
        setBreed(breed);
    }

    public String getBreed() {
        return breed;
    }

    public void setBreed(String breed) {
        this.breed = breed;
    }
}

public class Cat extends Animal {

    public String getFavoriteToy() {
        return favoriteToy;
    }

    public Cat() {}

    public Cat(String name, String favoriteToy) {
        setName(name);
        setFavoriteToy(favoriteToy);
    }

    public void setFavoriteToy(String favoriteToy) {
        this.favoriteToy = favoriteToy;
    }

    private String favoriteToy;

}

As you can see, there is nothing special for Cat and Dog, the only one that know about them is the abstract class Animal, so when deserializing, you'll target to Animal and the ObjectMapper will return the actual instance as you can see in the following test:

public class Test {

    public static void main(String[] args) {

        ObjectMapper objectMapper = new ObjectMapper();

        Animal myDog = new Dog("ruffus","english shepherd");

        Animal myCat = new Cat("goya", "mice");

        try {
            String dogJson = objectMapper.writeValueAsString(myDog);

            System.out.println(dogJson);

            Animal deserializedDog = objectMapper.readValue(dogJson, Animal.class);

            System.out.println("Deserialized dogJson Class: " + deserializedDog.getClass().getSimpleName());

            String catJson = objectMapper.writeValueAsString(myCat);

            Animal deseriliazedCat = objectMapper.readValue(catJson, Animal.class);

            System.out.println("Deserialized catJson Class: " + deseriliazedCat.getClass().getSimpleName());



        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

Output after running the Test class:

{"@type":"Dog","name":"ruffus","breed":"english shepherd"}

Deserialized dogJson Class: Dog

{"@type":"Cat","name":"goya","favoriteToy":"mice"}

Deserialized catJson Class: Cat

Hope this helps,

Jose Luis

How to open html file?

You can read HTML page using 'urllib'.

 #python 2.x

  import urllib

  page = urllib.urlopen("your path ").read()
  print page

UnicodeEncodeError: 'charmap' codec can't encode characters

if you are using windows try to pass encoding='latin1', encoding='iso-8859-1' or encoding='cp1252' example:

csv_data = pd.read_csv(csvpath,encoding='iso-8859-1')
print(print(soup.encode('iso-8859-1')))

Gradle DSL method not found: 'runProguard'

runProguard has been renamed to minifyEnabled in version 0.14.0 (2014/10/31) or more in Gradle.

To fix this, you need to change runProguard to minifyEnabled in the build.gradle file of your project.

What steps are needed to stream RTSP from FFmpeg?

Another streaming command I've had good results with is piping the ffmpeg output to vlc to create a stream. If you don't have these installed, you can add them:

sudo apt install vlc ffmpeg

In the example I use an mpeg transport stream (ts) over http, instead of rtsp. I've tried both, but the http ts stream seems to work glitch-free on my playback devices.

I'm using a video capture HDMI>USB device that sets itself up on the video4linux2 driver as input. Piping through vlc must be CPU-friendly, because my old dual-core Pentium CPU is able to do the real-time encoding with no dropped frames. I've also had audio-sync issues with some of the other methods, where this method always has perfect audio-sync.

You will have to adjust the command for your device or file. If you're using a file as input, you won't need all that v4l2 and alsa stuff. Here's the ffmpeg|vlc command:

ffmpeg -thread_queue_size 1024 -f video4linux2 -input_format mjpeg -i /dev/video0 -r 30 -f alsa -ac 1 -thread_queue_size 1024 -i hw:1,0 -acodec aac -vcodec libx264 -preset ultrafast -crf 18 -s hd720 -vf format=yuv420p -profile:v main -threads 0 -f mpegts -|vlc -I dummy - --sout='#std{access=http,mux=ts,dst=:8554}'

For example, lets say your server PC IP is 192.168.0.10, then the stream can be played by this command:

ffplay http://192.168.0.10:8554
#or
vlc http://192.168.0.10:8554

Python NLTK: SyntaxError: Non-ASCII character '\xc3' in file (Sentiment Analysis -NLP)

Add the following to the top of your file # coding=utf-8

If you go to the link in the error you can seen the reason why:

Defining the Encoding

Python will default to ASCII as standard encoding if no other encoding hints are given. To define a source code encoding, a magic comment must be placed into the source files either as first or second line in the file, such as: # coding=

UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 23: ordinal not in range(128)

When you get a UnicodeEncodeError, it means that somewhere in your code you convert directly a byte string to a unicode one. By default in Python 2 it uses ascii encoding, and utf8 encoding in Python3 (both may fail because not every byte is valid in either encoding)

To avoid that, you must use explicit decoding.

If you may have 2 different encoding in your input file, one of them accepts any byte (say UTF8 and Latin1), you can try to first convert a string with first and use the second one if a UnicodeDecodeError occurs.

def robust_decode(bs):
    '''Takes a byte string as param and convert it into a unicode one.
First tries UTF8, and fallback to Latin1 if it fails'''
    cr = None
    try:
        cr = bs.decode('utf8')
    except UnicodeDecodeError:
        cr = bs.decode('latin1')
    return cr

If you do not know original encoding and do not care for non ascii character, you can set the optional errors parameter of the decode method to replace. Any offending byte will be replaced (from the standard library documentation):

Replace with a suitable replacement character; Python will use the official U+FFFD REPLACEMENT CHARACTER for the built-in Unicode codecs on decoding and ‘?’ on encoding.

bs.decode(errors='replace')

How to encode text to base64 in python

To compatibility with both py2 and py3

import six
import base64

def b64encode(source):
    if six.PY3:
        source = source.encode('utf-8')
    content = base64.b64encode(source).decode('utf-8')

gcc: undefined reference to

However, avpicture_get_size is defined.

No, as the header (<libavcodec/avcodec.h>) just declares it.

The definition is in the library itself.

So you might like to add the linker option to link libavcodec when invoking gcc:

-lavcodec

Please also note that libraries need to be specified on the command line after the files needing them:

gcc -I$HOME/ffmpeg/include program.c -lavcodec

Not like this:

gcc -lavcodec -I$HOME/ffmpeg/include program.c

Referring to Wyzard's comment, the complete command might look like this:

gcc -I$HOME/ffmpeg/include program.c -L$HOME/ffmpeg/lib -lavcodec

For libraries not stored in the linkers standard location the option -L specifies an additional search path to lookup libraries specified using the -l option, that is libavcodec.x.y.z in this case.

For a detailed reference on GCC's linker option, please read here.

PhoneGap Eclipse Issue - eglCodecCommon glUtilsParamSize: unknow param errors

This is caused if you use the "Use host GPU" setting of the emulator and it will disappear after you uncheck this option. If you still need "Use host GPU", you can just filter out the errors by customizing the Logcat Filter. Enter ^(?!eglCodecCommon) into the "by Log Tag (regex)" field in order to strip out the unwanted lines from the Logcat output.

UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte

Instead of looking for ways to decode a5 (Yen ¥) or 96 (en-dash –), tell MySQL that your client is encoded "latin1", but you want "utf8" in the database.

See details in Trouble with UTF-8 characters; what I see is not what I stored

Best approach to real time http streaming to HTML5 video client

Try binaryjs. Its just like socket.io but only thing it do well is that it stream audio video. Binaryjs google it

How to deploy correctly when using Composer's develop / production switch?

On production servers I rename vendor to vendor-<datetime>, and during deployment will have two vendor dirs.

A HTTP cookie causes my system to choose the new vendor autoload.php, and after testing I do a fully atomic/instant switch between them to disable the old vendor dir for all future requests, then I delete the previous dir a few days later.

This avoids any problem caused by filesystem caches I'm using in apache/php, and also allows any active PHP code to continue using the previous vendor dir.

Despite other answers recommending against it, I personally run composer install on the server, since this is faster than rsync from my staging area (a VM on my laptop).

I use --no-dev --no-scripts --optimize-autoloader. You should read the docs for each one to check if this is appropriate on your environment.

How to playback MKV video in web browser?

You can use this following code. work just on chrome browser.

_x000D_

 function failed(e) {_x000D_
   // video playback failed - show a message saying why_x000D_
   switch (e.target.error.code) {_x000D_
     case e.target.error.MEDIA_ERR_ABORTED:_x000D_
       alert('You aborted the video playback.');_x000D_
       break;_x000D_
     case e.target.error.MEDIA_ERR_NETWORK:_x000D_
       alert('A network error caused the video download to fail part-way.');_x000D_
       break;_x000D_
     case e.target.error.MEDIA_ERR_DECODE:_x000D_
       alert('The video playback was aborted due to a corruption problem or because the video used features your browser did not support.');_x000D_
       break;_x000D_
     case e.target.error.MEDIA_ERR_SRC_NOT_SUPPORTED:_x000D_
       alert('The video could not be loaded, either because the server or network failed or because the format is not supported.');_x000D_
       break;_x000D_
     default:_x000D_
       alert('An unknown error occurred.');_x000D_
       break;_x000D_
   }_x000D_
 }

_x000D_

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">_x000D_
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">_x000D_
_x000D_
<head>_x000D_
 <meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />_x000D_
 <meta name="author" content="Amin Developer!" />_x000D_
_x000D_
 <title>Untitled 1</title>_x000D_
</head>_x000D_
<body>_x000D_
_x000D_
<p><video src="http://jell.yfish.us/media/Jellyfish-3-Mbps.mkv" type='video/x-matroska; codecs="theora, vorbis"' autoplay controls onerror="failed(event)" ></video></p>_x000D_
<p><a href="YOU mkv FILE LINK GOES HERE TO DOWNLOAD">Download the video file</a>.</p>_x000D_
_x000D_
</body>_x000D_
</html>

_x000D_

How to fix: "UnicodeDecodeError: 'ascii' codec can't decode byte"

Finally I got it:

as3:/usr/local/lib/python2.7/site-packages# cat sitecustomize.py
# encoding=utf8  
import sys  

reload(sys)  
sys.setdefaultencoding('utf8')

Let me check:

as3:~/ngokevin-site# python
Python 2.7.6 (default, Dec  6 2013, 14:49:02)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> reload(sys)
<module 'sys' (built-in)>
>>> sys.getdefaultencoding()
'utf8'
>>>

The above shows the default encoding of python is utf8. Then the error is no more.

HTML5 Video not working in IE 11

I used MP4Box to decode the atom tags in the mp4. (MP4Box -v myfile.mp4) I also used ffmpeg to convert the mp41 to mp42. After comparing the differences and experimenting, I found that IE11 did not like that my original mp4 had two avC1 atoms inside stsd.

After deleting the duplicate avC1 in my original mp41 mp4, IE11 would play the mp4.

Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat

I removed compile 'com.android.support:support-v4:18.0.+' in dependencies, and it works

ImportError: No module named dateutil.parser

You can find the dateutil package at https://pypi.python.org/pypi/python-dateutil. Extract it to somewhere and run the command:

python setup.py install

It worked for me!

Android Gradle plugin 0.7.0: "duplicate files during packaging of APK"

The problem is that the META-INF folder won't get filtered so multiple entries of NOTICE or LICENSE cause duplicates when building and it is tryed to copy them together.

Dirty Quick Fix:

Open the .jar file in your .gradle/caches/... folder (with a zip compatible tool) and remove or rename the files in the META-INF folder that cause the error (usally NOTICE or LICENSE). (I know thats also in the OP, but for me it was not really clear until I read the google forum)

EDIT:

This was fixed in 0.7.1. Just add the confilcting files to exclude.

android {
    packagingOptions {
        exclude 'META-INF/LICENSE'
    }
}

Javascript: console.log to html

You can override the default implementation of console.log()

(function () {
    var old = console.log;
    var logger = document.getElementById('log');
    console.log = function (message) {
        if (typeof message == 'object') {
            logger.innerHTML += (JSON && JSON.stringify ? JSON.stringify(message) : message) + '<br />';
        } else {
            logger.innerHTML += message + '<br />';
        }
    }
})();

Demo: Fiddle

UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 7: ordinal not in range(128)

You need to encode Unicode explicitly before writing to a file, otherwise Python does it for you with the default ASCII codec.

Pick an encoding and stick with it:

f.write(printinfo.encode('utf8') + '\n')

or use io.open() to create a file object that'll encode for you as you write to the file:

import io

f = io.open(filename, 'w', encoding='utf8')

You may want to read:

The Python Unicode HOWTO
Pragmatic Unicode by Ned Batchelder
The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) by Joel Spolsky

before continuing.

Playing m3u8 Files with HTML Video Tag

You can use video js library for easily play HLS video's. It allows to directly play videos

<!-- CSS  -->
 <link href="https://vjs.zencdn.net/7.2.3/video-js.css" rel="stylesheet">


<!-- HTML -->
<video id='hls-example'  class="video-js vjs-default-skin" width="400" height="300" controls>
<source type="application/x-mpegURL" src="http://www.streambox.fr/playlists/test_001/stream.m3u8">
</video>


<!-- JS code -->
<!-- If you'd like to support IE8 (for Video.js versions prior to v7) -->
<script src="https://vjs.zencdn.net/ie8/ie8-version/videojs-ie8.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/videojs-contrib-hls/5.14.1/videojs-contrib-hls.js"></script>
<script src="https://vjs.zencdn.net/7.2.3/video.js"></script>

<script>
var player = videojs('hls-example');
player.play();
</script>

GitHub Video Js

"for line in..." results in UnicodeDecodeError: 'utf-8' codec can't decode byte

Your file doesn't actually contain UTF-8 encoded data; it contains some other encoding. Figure out what that encoding is and use it in the open call.

In Windows-1252 encoding, for example, the 0xe9 would be the character é.

How to write UTF-8 in a CSV file

From your shell run:

pip2 install unicodecsv

And (unlike the original question) presuming you're using Python's built in csv module, turn
import csv into
import unicodecsv as csv in your code.

Reverse a string without using reversed() or [::-1]?

A golfed version: r=lambda x:"".join(x[i] for i in range(len(x-1),-1,-1)).

UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)

To find ANY and ALL unicode error related... Using the following command:

grep -r -P '[^\x00-\x7f]' /etc/apache2 /etc/letsencrypt /etc/nginx

Found mine in

/etc/letsencrypt/options-ssl-nginx.conf:        # The following CSP directives don't use default-src as

Using shed, I found the offending sequence. It turned out to be an editor mistake.

00008099:     C2  194 302 11000010
00008100:     A0  160 240 10100000
00008101:  d  64  100 144 01100100
00008102:  e  65  101 145 01100101
00008103:  f  66  102 146 01100110
00008104:  a  61  097 141 01100001
00008105:  u  75  117 165 01110101
00008106:  l  6C  108 154 01101100
00008107:  t  74  116 164 01110100
00008108:  -  2D  045 055 00101101
00008109:  s  73  115 163 01110011
00008110:  r  72  114 162 01110010
00008111:  c  63  099 143 01100011
00008112:     C2  194 302 11000010
00008113:     A0  160 240 10100000

Cutting the videos based on start and end time using ffmpeg

new answer (fast)

You can make bash do the math for you, and it works with milliseconds.

toSeconds() {
    awk -F: 'NF==3 { print ($1 * 3600) + ($2 * 60) + $3 } NF==2 { print ($1 * 60) + $2 } NF==1 { print 0 + $1 }' <<< $1
}

StartSeconds=$(toSeconds "45.5")
EndSeconds=$(toSeconds "1:00.5")
Duration=$(bc <<< "(${EndSeconds} + 0.01) - ${StartSeconds}" | awk '{ printf "%.4f", $0 }')
ffmpeg -ss $StartSeconds -i input.mpg -t $Duration output.mpg

This, like the old answer, will produce a 15 second clip. This method is ideal even when clipping from deep within a large file because seeking isn't disabled, unlike the old answer. And yes, I've verified it's frame perfect.

NOTE: The start-time is INCLUSIVE and the end-time is normally EXCLUSIVE, hence the +0.01, to make it inclusive.

If you use mpv you can enable millisecond timecodes in the OSD with --osd-fractions

old answer with explanation (slow)

To cut based on start and end time from the source video and avoid having to do math, specify the end time as the input option and the start time as the output option.

ffmpeg -t 1:00 -i input.mpg -ss 45 output.mpg

This will produce a 15 second cut from 0:45 to 1:00.

This is because when -ss is given as an output option, the discarded time is still included in the total time read from the input, which -t uses to know when to stop. Whereas if -ss is given as an input option, the start time is seeked and not counted, which is where the confusion comes from.

It's slower than seeking since the omitted segment is still processed before being discarded, but this is the only way to do it as far as I know. If you're clipping from deep within a large file, it's more prudent to just do the math and use -ss for the input.

Python unicode equal comparison failed

You may use the == operator to compare unicode objects for equality.

>>> s1 = u'Hello'
>>> s2 = unicode("Hello")
>>> type(s1), type(s2)
(<type 'unicode'>, <type 'unicode'>)
>>> s1==s2
True
>>> 
>>> s3='Hello'.decode('utf-8')
>>> type(s3)
<type 'unicode'>
>>> s1==s3
True
>>>

But, your error message indicates that you aren't comparing unicode objects. You are probably comparing a unicode object to a str object, like so:

>>> u'Hello' == 'Hello'
True
>>> u'Hello' == '\x81\x01'
__main__:1: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
False

See how I have attempted to compare a unicode object against a string which does not represent a valid UTF8 encoding.

Your program, I suppose, is comparing unicode objects with str objects, and the contents of a str object is not a valid UTF8 encoding. This seems likely the result of you (the programmer) not knowing which variable holds unicide, which variable holds UTF8 and which variable holds the bytes read in from a file.

I recommend http://nedbatchelder.com/text/unipain.html, especially the advice to create a "Unicode Sandwich."

UnicodeDecodeError when reading CSV file in Pandas with Python

Struggled with this a while and thought I'd post on this question as it's the first search result. Adding the encoding="iso-8859-1" tag to pandas read_csv didn't work, nor did any other encoding, kept giving a UnicodeDecodeError.

If you're passing a file handle to pd.read_csv(), you need to put the encoding attribute on the file open, not in read_csv. Obvious in hindsight, but a subtle error to track down.

Why do I get a SyntaxError for a Unicode escape in my file path?

Use this

os.chdir('C:/Users\expoperialed\Desktop\Python')

u'\ufeff' in Python string

That character is the BOM or "Byte Order Mark". It is usually received as the first few bytes of a file, telling you how to interpret the encoding of the rest of the data. You can simply remove the character to continue. Although, since the error says you were trying to convert to 'ascii', you should probably pick another encoding for whatever you were trying to do.

The type List is not generic; it cannot be parameterized with arguments [HTTPClient]

Your import has a subtle error:

import java.awt.List;

It should be:

import java.util.List;

The problem is that both awt and Java's util package provide a class called List. The former is a display element, the latter is a generic type used with collections. Furthermore, java.util.ArrayList extends java.util.List, not java.awt.List so if it wasn't for the generics, it would have still been a problem.

Edit: (to address further questions given by OP) As an answer to your comment, it seems that there is anther subtle import issue.

import org.omg.DynamicAny.NameValuePair;

should be

import org.apache.http.NameValuePair

nameValuePairs now uses the correct generic type parameter, the generic argument for new UrlEncodedFormEntity, which is List<? extends NameValuePair>, becomes valid, since your NameValuePair is now the same as their NameValuePair. Before, org.omg.DynamicAny.NameValuePair did not extend org.apache.http.NameValuePair and the shortened type name NameValuePair evaluated to org.omg... in your file, but org.apache... in their code.

Technically what is the main difference between Oracle JDK and OpenJDK?

OpenJDK is a reference model and open source, while Oracle JDK is an implementation of the OpenJDK and is not open source. Oracle JDK is more stable than OpenJDK.

OpenJDK is released under GPL v2 license whereas Oracle JDK is licensed under Oracle Binary Code License Agreement.

OpenJDK and Oracle JDK have almost the same code, but Oracle JDK has more classes and some bugs fixed.

So if you want to develop enterprise/commercial software I would suggest to go for Oracle JDK, as it is thoroughly tested and stable.

I have faced lot of problems with application crashes using OpenJDK, which are fixed just by switching to Oracle JDK

Writing a pandas DataFrame to CSV file

To write a pandas DataFrame to a CSV file, you will need DataFrame.to_csv. This function offers many arguments with reasonable defaults that you will more often than not need to override to suit your specific use case. For example, you might want to use a different separator, change the datetime format, or drop the index when writing. to_csv has arguments you can pass to address these requirements.

Here's a table listing some common scenarios of writing to CSV files and the corresponding arguments you can use for them.

Write to CSV ma dude

Footnotes

The default separator is assumed to be a comma (','). Don't change this unless you know you need to.

By default, the index of df is written as the first column. If your DataFrame does not have an index (IOW, the df.index is the default RangeIndex), then you will want to set index=False when writing. To explain this in a different way, if your data DOES have an index, you can (and should) use index=True or just leave it out completely (as the default is True).

It would be wise to set this parameter if you are writing string data so that other applications know how to read your data. This will also avoid any potential UnicodeEncodeErrors you might encounter while saving.

Compression is recommended if you are writing large DataFrames (>100K rows) to disk as it will result in much smaller output files. OTOH, it will mean the write time will increase (and consequently, the read time since the file will need to be decompressed).

Include .so library in apk in android studio

I've tried the solution presented in the accepted answer and it did not work for me. I wanted to share what DID work for me as it might help someone else. I've found this solution here.

Basically what you need to do is put your .so files inside a a folder named lib (Note: it is not libs and this is not a mistake). It should be in the same structure it should be in the APK file.

In my case it was:
Project:
|--lib:
|--|--armeabi:
|--|--|--.so files.

So I've made a lib folder and inside it an armeabi folder where I've inserted all the needed .so files. I then zipped the folder into a .zip (the structure inside the zip file is now lib/armeabi/*.so) I renamed the .zip file into armeabi.jar and added the line compile fileTree(dir: 'libs', include: '*.jar') into dependencies {} in the gradle's build file.

This solved my problem in a rather clean way.

UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2

#!/usr/bin/python

# encoding=utf8

Try This to starting of python file

python 3.2 UnicodeEncodeError: 'charmap' codec can't encode character '\u2013' in position 9629: character maps to <undefined>

While Python 3 deals in Unicode, the Windows console or POSIX tty that you're running inside does not. So, whenever you print, or otherwise send Unicode strings to stdout, and it's attached to a console/tty, Python has to encode it.

The error message indirectly tells you what character set Python was trying to use:

  File "C:\Python32\lib\encodings\cp850.py", line 19, in encode

This means the charset is cp850.

You can test or yourself that this charset doesn't have the appropriate character just by doing '\u2013'.encode('cp850'). Or you can look up cp850 online (e.g., at Wikipedia).

It's possible that Python is guessing wrong, and your console is really set for, say UTF-8. (In that case, just manually set sys.stdout.encoding='utf-8'.) It's also possible that you intended your console to be set for UTF-8 but did something wrong. (In that case, you probably want to follow up at superuser.com.)

But if nothing is wrong, you just can't print that character. You will have to manually encode it with one of the non-strict error-handlers. For example:

>>> '\u2013'.encode('cp850')
UnicodeEncodeError: 'charmap' codec can't encode character '\u2013' in position 0: character maps to <undefined>
>>> '\u2013'.encode('cp850', errors='replace')
b'?'

So, how do you print a string that won't print on your console?

You can replace every print function with something like this:

>>> print(r['body'].encode('cp850', errors='replace').decode('cp850'))
?

… but that's going to get pretty tedious pretty fast.

The simple thing to do is to just set the error handler on sys.stdout:

>>> sys.stdout.errors = 'replace'
>>> print(r['body'])
?

For printing to a file, things are pretty much the same, except that you don't have to set f.errors after the fact, you can set it at construction time. Instead of this:

with open('path', 'w', encoding='cp850') as f:

Do this:

with open('path', 'w', encoding='cp850', errors='replace') as f:

… Or, of course, if you can use UTF-8 files, just do that, as Mark Ransom's answer shows:

with open('path', 'w', encoding='utf-8') as f:

fatal error LNK1169: one or more multiply defined symbols found in game programming

just add /FORCE as linker flag and you're all set.

for instance, if you're working on CMakeLists.txt. Then add following line:

SET(CMAKE_EXE_LINKER_FLAGS  "/FORCE")

Maven Java EE Configuration Marker with Java Server Faces 1.2

The below steps should be the simple fix to your problem

Project->Properties->ProjectFacet-->Uncheck jsf apply and OK.

Project->Maven->UpdateProject-->This will solve the issue.

Here while on Updating Project Maven will automatically chooses the Dynamic web module

python encoding utf-8

Unfortunately, the string.encode() method is not always reliable. Check out this thread for more information: What is the fool proof way to convert some string (utf-8 or else) to a simple ASCII string in python

Convert Python dictionary to JSON array

If you are fine with non-printable symbols in your json, then add ensure_ascii=False to dumps call.

>>> json.dumps(your_data, ensure_ascii=False)

If ensure_ascii is false, then the return value will be a unicode instance subject to normal Python str to unicode coercion rules instead of being escaped to an ASCII str.

UnicodeEncodeError: 'charmap' codec can't encode - character maps to <undefined>, print function

I see three solutions to this:

Change the output encoding, so it will always output UTF-8. See e.g. Setting the correct encoding when piping stdout in Python, but I could not get these example to work.
Following example code makes the output aware of your target charset.
```
# -*- coding: utf-8 -*-
import sys

print sys.stdout.encoding
print u"Stöcker".encode(sys.stdout.encoding, errors='replace')
print u"????????".encode(sys.stdout.encoding, errors='replace')
```
This example properly replaces any non-printable character in my name with a question mark.

If you create a custom print function, e.g. called myprint, using that mechanisms to encode output properly you can simply replace print with myprint whereever necessary without making the whole code look ugly.
Reset the output encoding globally at the begin of the software:

The page http://www.macfreek.nl/memory/Encoding_of_Python_stdout has a good summary what to do to change output encoding. Especially the section "StreamWriter Wrapper around Stdout" is interesting. Essentially it says to change the I/O encoding function like this:

In Python 2:
```
if sys.stdout.encoding != 'cp850':
  sys.stdout = codecs.getwriter('cp850')(sys.stdout, 'strict')
if sys.stderr.encoding != 'cp850':
  sys.stderr = codecs.getwriter('cp850')(sys.stderr, 'strict')
```
In Python 3:
```
if sys.stdout.encoding != 'cp850':
  sys.stdout = codecs.getwriter('cp850')(sys.stdout.buffer, 'strict')
if sys.stderr.encoding != 'cp850':
  sys.stderr = codecs.getwriter('cp850')(sys.stderr.buffer, 'strict')
```
If used in CGI outputting HTML you can replace 'strict' by 'xmlcharrefreplace' to get HTML encoded tags for non-printable characters.

Feel free to modify the approaches, setting different encodings, .... Note that it still wont work to output non-specified data. So any data, input, texts must be correctly convertable into unicode:
```
# -*- coding: utf-8 -*-
import sys
import codecs
sys.stdout = codecs.getwriter("iso-8859-1")(sys.stdout, 'xmlcharrefreplace')
print u"Stöcker"                # works
print "Stöcker".decode("utf-8") # works
print "Stöcker"                 # fails
```

How to recompile with -fPIC

I hit this same issue trying to install Dashcast on Centos 7. The fix was adding -fPIC at the end of each of the CFLAGS in the x264 Makefile. Then I had to run make distclean for both x264 and ffmpeg and rebuild.

How to increase IDE memory limit in IntelliJ IDEA on Mac?

go to that path "C:\Program Files (x86)\JetBrains\IntelliJ IDEA 12.1.4\bin\idea.exe.vmoptions" and change size to -Xmx512m

  -Xms128m
  -Xmx512m
  -XX:MaxPermSize=250m
  -XX:ReservedCodeCacheSize=64m
  -XX:+UseCodeCacheFlushing
  -ea
  -Dsun.io.useCanonCaches=false
  -Djava.net.preferIPv4Stack=true

hope its will work

Matplotlib-Animation "No MovieWriters Available"

I'm running Ubuntu 20 and I had a similar problem

Installed ffmpeg

pip install ffmpeg

then

sudo apt install ffmpeg

Encoding as Base64 in Java

On Android, use the static methods of the android.util.Base64 utility class. The referenced documentation says that the Base64 class was added in API level 8 (Android 2.2 (Froyo)).

import android.util.Base64;

byte[] encodedBytes = Base64.encode("Test".getBytes());
Log.d("tag", "encodedBytes " + new String(encodedBytes));

byte[] decodedBytes = Base64.decode(encodedBytes);
Log.d("tag", "decodedBytes " + new String(decodedBytes));

Execute jar file with multiple classpath libraries from command prompt

You can use maven-assembly-plugin, Here is the example from the official site: https://maven.apache.org/plugins/maven-assembly-plugin/usage.html

    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>2.5.1</version>
        <configuration>
            <descriptorRefs>
                <descriptorRef>jar-with-dependencies</descriptorRef>
            </descriptorRefs>
            <archive>
                <manifest>
                    <mainClass>your main class</mainClass>
                </manifest>
            </archive>
        </configuration>
        <executions>
            <execution>
                <id>make-assembly</id> <!-- this is used for inheritance merges -->
                <phase>package</phase> <!-- bind to the packaging phase -->
                <goals>
                    <goal>single</goal>
                </goals>
            </execution>
        </executions>
    </plugin>

Visual Studio debugging/loading very slow

Yet another possible cause is pre-compilation of old projects that exist on the file system but have been removed or partially removed from visual studio.

I had a solution that was taking 3.5 minutes to load after a build, I had a look at the timestamps in Temporary ASP.NET Files and saw that the 3 minute delay was on a file in an old project. Had a look in VS & the project was "unavailable". Deleted it from VS, deleted from the file system, and now we're down to a sweet 8 seconds.

UnicodeDecodeError: 'utf8' codec can't decode byte 0x9c

I had same problem with UnicodeDecodeError and i solved it with this line. Don't know if is the best way but it worked for me.

str = str.decode('unicode_escape').encode('utf-8')

Printing to the console in Google Apps Script?

Answering the OP questions

A) What do I not understand about how the Google Apps Script console works with respect to printing so that I can see if my code is accomplishing what I'd like?

The code on .gs files of a Google Apps Script project run on the server rather than on the web browser. The way to log messages was to use the Class Logger.

B) Is it a problem with the code?

As the error message said, the problem was that console was not defined but nowadays the same code will throw other error:

ReferenceError: "playerArray" is not defined. (line 12, file "Code")

That is because the playerArray is defined as local variable. Moving the line out of the function will solve this.

var playerArray = [];

function addplayerstoArray(numplayers) {
  for (i=0; i<numplayers; i++) {
    playerArray.push(i);
  }
}  

addplayerstoArray(7);

console.log(playerArray[3])

Now that the code executes without throwing errors, instead to look at the browser console we should look at the Stackdriver Logging. From the Google Apps Script editor UI click on View > Stackdriver Logging.

Addendum

On 2017 Google released to all scripts Stackdriver Logging and added the Class Console, so including something like console.log('Hello world!') will not throw an error but the log will be on Google Cloud Platform Stackdriver Logging Service instead of the browser console.

From Google Apps Script Release Notes 2017

June 23, 2017

Stackdriver Logging has been moved out of Early Access. All scripts now have access to Stackdriver logging.

From Logging > Stackdriver logging

The following example shows how to use the console service to log information in Stackdriver.

function measuringExecutionTime() {
  // A simple INFO log message, using sprintf() formatting.
  console.info('Timing the %s function (%d arguments)', 'myFunction', 1);

  // Log a JSON object at a DEBUG level. The log is labeled
  // with the message string in the log viewer, and the JSON content
  // is displayed in the expanded log structure under "structPayload".
  var parameters = {
      isValid: true,
      content: 'some string',
      timestamp: new Date()
  };
  console.log({message: 'Function Input', initialData: parameters});

  var label = 'myFunction() time';  // Labels the timing log entry.
  console.time(label);              // Starts the timer.
  try {
    myFunction(parameters);         // Function to time.
  } catch (e) {
    // Logs an ERROR message.
    console.error('myFunction() yielded an error: ' + e);
  }
  console.timeEnd(label);      // Stops the timer, logs execution duration.
}

JavaScript: function returning an object

You can simply do it like this with an object literal:

function makeGamePlayer(name,totalScore,gamesPlayed) {
    return {
        name: name,
        totalscore: totalScore,
        gamesPlayed: gamesPlayed
    };
}

The module was expected to contain an assembly manifest

First try to open the file with a decompiler such as ILSpy, your dll might be corrupt. I had this error on an online web site, when I downloaded the dll and tried to open it, it was corrupt, probably some error occurred while uploading it via ftp.

How to make Sonar ignore some classes for codeCoverage metric?

I had to struggle for a little bit but I found a solution, I added

-Dsonar.coverage.exclusions=**/*.*

and the coverage metric was cancelled from the dashboard at all, so I realized that the problem was the path I was passing, not the property. In my case the path to exclude was java/org/acme/exceptions, so I used :

`-Dsonar.coverage.exclusions=**/exceptions/**/*.*`

and it worked, but since I don't have sub-folders it also works with

-Dsonar.coverage.exclusions=**/exceptions/*.*

ffmpeg - Converting MOV files to MP4

The command to just stream it to a new container (mp4) needed by some applications like Adobe Premiere Pro without encoding (fast) is:

ffmpeg -i input.mov -qscale 0 output.mp4

Alternative as mentioned in the comments, which re-encodes with best quaility (-qscale 0):

ffmpeg -i input.mov -q:v 0 output.mp4

How to add a new audio (not mixing) into a video using ffmpeg?

If the input video has multiple audio tracks and you need to add one more then use the following command:

ffmpeg -i input_video_with_audio.avi -i new_audio.ac3 -map 0 -map 1 -codec copy output_video.avi

-map 0 means to copy (include) all streams from the first input file (input_video_with_audio.avi) and -map 1 means to include all streams (in this case one) from the second input file (new_audio.ac3).

Decoding a Base64 string in Java

If you don't want to use apache, you can use Java8:

byte[] decodedBytes = Base64.getDecoder().decode("YWJjZGVmZw=="); 
System.out.println(new String(decodedBytes) + "\n");

how to create insert new nodes in JsonNode?

These methods are in ObjectNode: the division is such that most read operations are included in JsonNode, but mutations in ObjectNode and ArrayNode.

Note that you can just change first line to be:

ObjectNode jNode = mapper.createObjectNode();
// version ObjectMapper has should return ObjectNode type

ObjectNode jNode = (ObjectNode) objectCodec.createObjectNode();
// ObjectCodec is in core part, must be of type JsonNode so need cast

Setting Camera Parameters in OpenCV/Python

Not all parameters are supported by all cameras - actually, they are one of the most troublesome part of the OpenCV library. Each camera type - from android cameras to USB cameras to professional ones offer a different interface to modify its parameters. There are many branches in OpenCV code to support as many of them, but of course not all possibilities are covered.

What you can do is to investigate your camera driver, write a patch for OpenCV and send it to code.opencv.org. This way others will enjoy your work, the same way you enjoy others'.

There is also a possibility that your camera does not support your request - most USB cams are cheap and simple. Maybe that parameter is just not available for modifications.

If you are sure the camera supports a given param (you say the camera manufacturer provides some code) and do not want to mess with OpenCV, you can wrap that sample code in C++ with boost::python, to make it available in Python. Then, enjoy using it.

string encoding and decoding?

Guessing at all the things omitted from the original question, but, assuming Python 2.x the key is to read the error messages carefully: in particular where you call 'encode' but the message says 'decode' and vice versa, but also the types of the values included in the messages.

In the first example string is of type unicode and you attempted to decode it which is an operation converting a byte string to unicode. Python helpfully attempted to convert the unicode value to str using the default 'ascii' encoding but since your string contained a non-ascii character you got the error which says that Python was unable to encode a unicode value. Here's an example which shows the type of the input string:

>>> u"\xa0".decode("ascii", "ignore")

Traceback (most recent call last):
  File "<pyshell#7>", line 1, in <module>
    u"\xa0".decode("ascii", "ignore")
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 0: ordinal not in range(128)

In the second case you do the reverse attempting to encode a byte string. Encoding is an operation that converts unicode to a byte string so Python helpfully attempts to convert your byte string to unicode first and, since you didn't give it an ascii string the default ascii decoder fails:

>>> "\xc2".encode("ascii", "ignore")

Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    "\xc2".encode("ascii", "ignore")
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 0: ordinal not in range(128)

UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1

In my case, it was caused by my Unicode file being saved with a "BOM". To solve this, I cracked open the file using BBEdit and did a "Save as..." choosing for encoding "Unicode (UTF-8)" and not what it came with which was "Unicode (UTF-8, with BOM)"

What is the difference between H.264 video and MPEG-4 video?

They are names for the same standard from two different industries with different naming methods, the guys who make & sell movies and the guys who transfer the movies over the internet. Since 2003: "MPEG 4 Part 10" = "H.264" = "AVC". Before that the relationship was a little looser in that they are not equal but an "MPEG 4 Part 2" decoder can render a stream that's "H.263". The Next standard is "MPEG H Part 2" = "H.265" = "HEVC"

UnicodeDecodeError: 'ascii' codec can't decode byte 0xd1 in position 2: ordinal not in range(128)

if you get this issue while running certbot while creating or renewing certificate, Please use the following method

grep -r -P '[^\x00-\x7f]' /etc/apache2 /etc/letsencrypt /etc/nginx

That command found the offending character "´" in one .conf file in the comment. After removing it (you can edit comments as you wish) and reloading nginx, everything worked again.

Source :https://github.com/certbot/certbot/issues/5236

Usage of unicode() and encode() functions in Python

You are using encode("utf-8") incorrectly. Python byte strings (str type) have an encoding, Unicode does not. You can convert a Unicode string to a Python byte string using uni.encode(encoding), and you can convert a byte string to a Unicode string using s.decode(encoding) (or equivalently, unicode(s, encoding)).

If fullFilePath and path are currently a str type, you should figure out how they are encoded. For example, if the current encoding is utf-8, you would use:

path = path.decode('utf-8')
fullFilePath = fullFilePath.decode('utf-8')

If this doesn't fix it, the actual issue may be that you are not using a Unicode string in your execute() call, try changing it to the following:

cur.execute(u"update docs set path = :fullFilePath where path = :path", locals())

Is there something like Codecademy for Java

Compilr seems to be going in that direction: http://compilr.com/teachers

How to play a notification sound on websites?

How about the yahoo's media player Just embed yahoo's library

<script type="text/javascript" src="http://mediaplayer.yahoo.com/js"></script>

And use it like

<a id="beep" href="song.mp3">Play Song</a>

To autostart

$(function() { $("#beep").click(); });

UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 20: ordinal not in range(128)

I've actually found that in most of my cases, just stripping out those characters is much simpler:

s = mystring.decode('ascii', 'ignore')

How can I extract audio from video with ffmpeg?

For people looking for the simpler way to extract audio from a video file while retaining the original video file's parameters, you can use:

ffmpeg -i <video_file_name.extension> <audio_file_name.extension>

For example, running:

ffmpeg -i screencap.mov screencap.mp3

extracts an mp3 audio file from a mov video file.

Python - 'ascii' codec can't decode byte

If you're using Python < 3, you'll need to tell the interpreter that your string literal is Unicode by prefixing it with a u:

Python 2.7.2 (default, Jan 14 2012, 23:14:09) 
[GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> "??".encode("utf8")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe4 in position 0: ordinal not in range(128)
>>> u"??".encode("utf8")
'\xe4\xbd\xa0\xe5\xa5\xbd'

Further reading: Unicode HOWTO.

UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to <undefined>

If file = open(filename, encoding="utf8") doesn't work, try
file = open(filename, errors="ignore"), if you want to remove unneeded characters.

How to autoplay HTML5 mp4 video on Android?

Autoplay only works the second time through. on android 4.1+ you have to have some kind of user event to get the first play() to work. Once that has happened then autostart works.

This is so that the user is acknowledging that they are using bandwidth.

There is another question that answers this . Autostart html5 video using android 4 browser

Convert UTF-8 with BOM to UTF-8 with no BOM in Python

Simply use the "utf-8-sig" codec:

fp = open("file.txt")
s = fp.read()
u = s.decode("utf-8-sig")

That gives you a unicode string without the BOM. You can then use

s = u.encode("utf-8")

to get a normal UTF-8 encoded string back in s. If your files are big, then you should avoid reading them all into memory. The BOM is simply three bytes at the beginning of the file, so you can use this code to strip them out of the file:

import os, sys, codecs

BUFSIZE = 4096
BOMLEN = len(codecs.BOM_UTF8)

path = sys.argv[1]
with open(path, "r+b") as fp:
    chunk = fp.read(BUFSIZE)
    if chunk.startswith(codecs.BOM_UTF8):
        i = 0
        chunk = chunk[BOMLEN:]
        while chunk:
            fp.seek(i)
            fp.write(chunk)
            i += len(chunk)
            fp.seek(BOMLEN, os.SEEK_CUR)
            chunk = fp.read(BUFSIZE)
        fp.seek(-BOMLEN, os.SEEK_CUR)
        fp.truncate()

It opens the file, reads a chunk, and writes it out to the file 3 bytes earlier than where it read it. The file is rewritten in-place. As easier solution is to write the shorter file to a new file like newtover's answer. That would be simpler, but use twice the disk space for a short period.

As for guessing the encoding, then you can just loop through the encoding from most to least specific:

def decode(s):
    for encoding in "utf-8-sig", "utf-16":
        try:
            return s.decode(encoding)
        except UnicodeDecodeError:
            continue
    return s.decode("latin-1") # will always work

An UTF-16 encoded file wont decode as UTF-8, so we try with UTF-8 first. If that fails, then we try with UTF-16. Finally, we use Latin-1 — this will always work since all 256 bytes are legal values in Latin-1. You may want to return None instead in this case since it's really a fallback and your code might want to handle this more carefully (if it can).

Use ffmpeg to add text subtitles

I will provide a simple and general answer that works with any number of audios and srt subtitles and respects the metadata that may include the mkv container. So it will even add the images the matroska may include as attachments (though not another types AFAIK) and convert them to tracks; you will not be able to watch but they will be there (you can demux them). Ah, and if the mkv has chapters the mp4 too.

ffmpeg -i <mkv-input> -c copy -map 0 -c:s mov_text <mp4-output>

As you can see, it's all about the -map 0, that tells FFmpeg to add all the tracks, which includes metadata, chapters, attachments, etc. If there is an unrecognized "track" (mkv allows to attach any type of file), it will end with an error.

You can create a simple batch mkv2mp4.bat, if you usually do this, to create an mp4 with the same name as the mkv. It would be better with error control, a different output name, etc., but you get the point.

@ffmpeg -i %1 -c copy -map 0 -c:s mov_text "%~n1.mp4"

Now you can simply run

mkv2mp4 "Video with subtitles etc.mkv"

And it will create "Video with subtitles etc.mp4" with the maximum of information included.

How can I give the Intellij compiler more heap space?

I like to share a revelation that I had. When you build a project, Intellij Idea runs a java process that resides in its core(ex: C:\Program Files\JetBrains\IntelliJ IDEA 2020.3\jbr\bin). The "build process heap size", as mentioned by many others, changes the heap size of this java process. However, the main java process is triggered later by the Idea's java process, hence have different VM arguments. I noticed that the max heap size of this process is 1/3 of the Idea's java process, while min heap is the half of max(1/6). To round up:

When you set 9g heap on "build process heap size" the actual heap size for the compiler is max 3g and min 1,5g. And no need for restart is neccessary.

PS: tested on version 2020.3

java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Base64.encodeBase64String() in Java EE application

Some Google tooling such as GWT has an embedded version of commons-codec with a pre-1.4 Base64 class. You may need to make such tooling JARs inaccessible to your code by refactoring your project such that only the parts of your code that need that tooling can see the dependency.

How to concatenate two MP4 files using FFmpeg?

For .mp4 files, I found it works better and faster to use the opensource command line tool: mp4box. Then You can use it this way:

mp4box.exe -add video1.mp4 -cat video2.mp4 destvideo.mp4

Download it here for most platforms: https://gpac.wp.imt.fr/mp4box/

What's the correct way to convert bytes to a hex string in Python 3?

OK, the following answer is slightly beyond-scope if you only care about Python 3, but this question is the first Google hit even if you don't specify the Python version, so here's a way that works on both Python 2 and Python 3.

I'm also interpreting the question to be about converting bytes to the str type: that is, bytes-y on Python 2, and Unicode-y on Python 3.

Given that, the best approach I know is:

import six

bytes_to_hex_str = lambda b: ' '.join('%02x' % i for i in six.iterbytes(b))

The following assertion will be true for either Python 2 or Python 3, assuming you haven't activated the unicode_literals future in Python 2:

assert bytes_to_hex_str(b'jkl') == '6a 6b 6c'

(Or you can use ''.join() to omit the space between the bytes, etc.)

Python: Converting from ISO-8859-1/latin1 to UTF-8

This is a common problem, so here's a relatively thorough illustration.

For non-unicode strings (i.e. those without u prefix like u'\xc4pple'), one must decode from the native encoding (iso8859-1/latin1, unless modified with the enigmatic sys.setdefaultencoding function) to unicode, then encode to a character set that can display the characters you wish, in this case I'd recommend UTF-8.

First, here is a handy utility function that'll help illuminate the patterns of Python 2.7 string and unicode:

>>> def tell_me_about(s): return (type(s), s)

A plain string

>>> v = "\xC4pple" # iso-8859-1 aka latin1 encoded string

>>> tell_me_about(v)
(<type 'str'>, '\xc4pple')

>>> v
'\xc4pple'        # representation in memory

>>> print v
?pple             # map the iso-8859-1 in-memory to iso-8859-1 chars
                  # note that '\xc4' has no representation in iso-8859-1, 
                  # so is printed as "?".

Decoding a iso8859-1 string - convert plain string to unicode

>>> uv = v.decode("iso-8859-1")
>>> uv
u'\xc4pple'       # decoding iso-8859-1 becomes unicode, in memory

>>> tell_me_about(uv)
(<type 'unicode'>, u'\xc4pple')

>>> print v.decode("iso-8859-1")
Äpple             # convert unicode to the default character set
                  # (utf-8, based on sys.stdout.encoding)

>>> v.decode('iso-8859-1') == u'\xc4pple'
True              # one could have just used a unicode representation 
                  # from the start

A little more illustration — with “Ä”

>>> u"Ä" == u"\xc4"
True              # the native unicode char and escaped versions are the same

>>> "Ä" == u"\xc4"  
False             # the native unicode char is '\xc3\x84' in latin1

>>> "Ä".decode('utf8') == u"\xc4"
True              # one can decode the string to get unicode

>>> "Ä" == "\xc4"
False             # the native character and the escaped string are
                  # of course not equal ('\xc3\x84' != '\xc4').

Encoding to UTF

>>> u8 = v.decode("iso-8859-1").encode("utf-8")
>>> u8
'\xc3\x84pple'    # convert iso-8859-1 to unicode to utf-8

>>> tell_me_about(u8)
(<type 'str'>, '\xc3\x84pple')

>>> u16 = v.decode('iso-8859-1').encode('utf-16')
>>> tell_me_about(u16)
(<type 'str'>, '\xff\xfe\xc4\x00p\x00p\x00l\x00e\x00')

>>> tell_me_about(u8.decode('utf8'))
(<type 'unicode'>, u'\xc4pple')

>>> tell_me_about(u16.decode('utf16'))
(<type 'unicode'>, u'\xc4pple')

Relationship between unicode and UTF and latin1

>>> print u8
Äpple             # printing utf-8 - because of the encoding we now know
                  # how to print the characters

>>> print u8.decode('utf-8') # printing unicode
Äpple

>>> print u16     # printing 'bytes' of u16
???pple

>>> print u16.decode('utf16')
Äpple             # printing unicode

>>> v == u8
False             # v is a iso8859-1 string; u8 is a utf-8 string

>>> v.decode('iso8859-1') == u8
False             # v.decode(...) returns unicode

>>> u8.decode('utf-8') == v.decode('latin1') == u16.decode('utf-16')
True              # all decode to the same unicode memory representation
                  # (latin1 is iso-8859-1)

Unicode Exceptions

 >>> u8.encode('iso8859-1')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 0:
  ordinal not in range(128)

>>> u16.encode('iso8859-1')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xff in position 0:
  ordinal not in range(128)

>>> v.encode('iso8859-1')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc4 in position 0:
  ordinal not in range(128)

One would get around these by converting from the specific encoding (latin-1, utf8, utf16) to unicode e.g. u8.decode('utf8').encode('latin1').

So perhaps one could draw the following principles and generalizations:

a type str is a set of bytes, which may have one of a number of encodings such as Latin-1, UTF-8, and UTF-16
a type unicode is a set of bytes that can be converted to any number of encodings, most commonly UTF-8 and latin-1 (iso8859-1)
the print command has its own logic for encoding, set to sys.stdout.encoding and defaulting to UTF-8
One must decode a str to unicode before converting to another encoding.

Of course, all of this changes in Python 3.x.

Hope that is illuminating.

UnicodeDecodeError: 'utf8' codec can't decode bytes in position 3-6: invalid data

Paste this on your command line:

export LC_CTYPE="en_US.UTF-8"

Maven2: Missing artifact but jars are in place

I encountered similar issue. The missing artifacts (jar files) exists in ~/.m2 directory and somehow eclipse is unable to find it.

For example: Missing artifact org.jdom:jdom:jar:1.1:compile

I looked through this directory ~/.m2/repository/org/jdom/jdom/1.1 and I noticed there is this file _maven.repositories. I opened it using text editor and saw the following entry:

#NOTE: This is an internal implementation file, its format can be changed without prior notice.
#Wed Feb 13 17:12:29 SGT 2013
jdom-1.1.jar>central=
jdom-1.1.pom>central=

I simply removed the "central" word from the file:

#NOTE: This is an internal implementation file, its format can be changed without prior notice.
#Wed Feb 13 17:12:29 SGT 2013
jdom-1.1.jar>=
jdom-1.1.pom>=

and run Maven > Update Project from eclipse and it just worked :) Note that your file may contain other keyword instead of "central".

Writing Unicode text to a text file?

In case of writing in python3

>>> a = u'bats\u00E0'
>>> print a
batsà
>>> f = open("/tmp/test", "w")
>>> f.write(a)
>>> f.close()
>>> data = open("/tmp/test").read()
>>> data
'batsà'

In case of writing in python2:

>>> a = u'bats\u00E0'
>>> f = open("/tmp/test", "w")
>>> f.write(a)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe0' in position 4: ordinal not in range(128)

To avoid this error you would have to encode it to bytes using codecs "utf-8" like this:

>>> f.write(a.encode("utf-8"))
>>> f.close()

and decode the data while reading using the codecs "utf-8":

>>> data = open("/tmp/test").read()
>>> data.decode("utf-8")
u'bats\xe0'

And also if you try to execute print on this string it will automatically decode using the "utf-8" codecs like this

>>> print a
batsà

HTML5 live streaming

<object classid="CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95" codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701"
            height="285" id="mediaPlayer" standby="Loading Microsoft Windows Media Player components..."
            type="application/x-oleobject" width="360" style="margin-bottom:30px;">
            <param name="fileName" value="mms://my_IP_Address:my_port" />
            <param name="animationatStart" value="true" />
            <param name="transparentatStart" value="true" />
            <param name="autoStart" value="true" />
            <param name="showControls" value="true" />
            <param name="loop" value="true" />
            <embed autosize="-1" autostart="true" bgcolor="darkblue" designtimesp="5311" displaysize="4"
                height="285" id="mediaPlayer" loop="true" name="mediaPlayer" pluginspage="http://microsoft.com/windows/mediaplayer/en/download/"
                showcontrols="true" showdisplay="0" showstatusbar="-1" showtracker="-1" src="mms://my_IP_Address:my_port"
                type="application/x-mplayer2" videoborder3d="-1" width="360"></embed>
</object>

Py_Initialize fails - unable to load the file system codec

From python3k, the startup need the encodings module, which can be found in PYTHONHOME\Lib directory. In fact, the API Py_Initialize () do the init and import the encodings module. Make sure PYTHONHOME\Lib is in sys.path and check the encodings module is there.

ffmpeg usage to encode a video to H264 codec format

I have a Centos 5 system that I wasn't able to get this working on. So I built a new Fedora 17 system (actually a VM in VMware), and followed the steps at the ffmpeg site to build the latest and greatest ffmpeg.

I took some shortcuts - I skipped all the yum erase commands, added freshrpms according to their instructions:

wget http://ftp.freshrpms.net/pub/freshrpms/fedora/linux/9/freshrpms-release/freshrpms-release-1.1-1.fc.noarch.rpm
rpm -ivh rpmfusion-free-release-stable.noarch.rpm

Then I loaded the stuff that was already readily available:

yum install lame libogg libtheora libvorbis lame-devel libtheora-devel

Afterwards, I only built the following from scratch: libvpx vo-aacenc-0.1.2 x264 yasm-1.2.0 ffmpeg

Then this command encoded with no problems (the audio was already in AAC, so I didn't recode it):

ffmpeg -i input.mov -c:v libx264 -preset slow -crf 22 -c:a copy output.mp4

The result looks just as good as the original to me, and is about 1/4 of the size!

FFmpeg: How to split video efficiently?

does the later approach save computation time and memory?

There is no big difference between those two examples that you provided. The first example cuts the video sequentially, in 2 steps, while the second example does it at the same time (using threads). No particular speed-up will be noticeable. You can read more about creating multiple outputs with FFmpeg

Further more, what you can use (in recent FFmpeg) is the stream segmenter muxer which can:

output streams to a number of separate files of nearly fixed duration. Output filename pattern can be set in a fashion similar to image2.

UnicodeDecodeError, invalid continuation byte

In this case, I tried to execute a .py which active a path/file.sql.

My solution was to modify the codification of the file.sql to "UTF-8 without BOM" and it works!

You can do it with Notepad++.

i will leave a part of my code.

/Code/

con=psycopg2.connect(host = sys.argv[1], port = sys.argv[2],dbname = sys.argv[3],user = sys.argv[4], password = sys.argv[5])

cursor = con.cursor() sqlfile = open(path, 'r')

fatal: git-write-tree: error building trees

Use:

git reset --mixed

instead of git reset --hard. You will not lose any changes.

UnicodeEncodeError: 'ascii' codec can't encode character u'\u2013' in position 3 2: ordinal not in range(128)

I had the same problem. This work fine for me:

str(objdata).encode('utf-8')

UnicodeEncodeError: 'ascii' codec can't encode character u'\xef' in position 0: ordinal not in range(128)

The problem according to your traceback is the print statement on line 136 of parseXML.py. Unfortunately you didn't see fit to post that part of your code, but I'm going to guess it is just there for debugging. If you change it to:

print repr(ch)

then you should at least see what you are trying to print.

C++ error: "Array must be initialized with a brace enclosed initializer"

The syntax to statically initialize an array uses curly braces, like this:

int array[10] = { 0 };

This will zero-initialize the array.

For multi-dimensional arrays, you need nested curly braces, like this:

int cipher[Array_size][Array_size]= { { 0 } };

Note that Array_size must be a compile-time constant for this to work. If Array_size is not known at compile-time, you must use dynamic initialization. (Preferably, an std::vector).

Python script to convert from UTF-8 to ASCII

UTF-8 is a superset of ASCII. Either your UTF-8 file is ASCII, or it can't be converted without loss.

UnicodeEncodeError: 'latin-1' codec can't encode character

Use the below snippet to convert the text from Latin to English

import unicodedata
def strip_accents(text):
    return "".join(char for char in
                   unicodedata.normalize('NFKD', text)
                   if unicodedata.category(char) != 'Mn')

strip_accents('áéíñóúü')

output:

'aeinouu'

How to parse a JSON string into JsonNode in Jackson?

import com.github.fge.jackson.JsonLoader;
JsonLoader.fromString("{\"k1\":\"v1\"}")
== JsonNode = {"k1":"v1"}

What are all codecs and formats supported by FFmpeg?

ffmpeg -codecs

should give you all the info about the codecs available.

You will see some letters next to the codecs:

Codecs:
 D..... = Decoding supported
 .E.... = Encoding supported
 ..V... = Video codec
 ..A... = Audio codec
 ..S... = Subtitle codec
 ...I.. = Intra frame-only codec
 ....L. = Lossy compression
 .....S = Lossless compression

A connection was successfully established with the server, but then an error occurred during the pre-login handshake

I had this same problem and was having no luck with the suggested fixes. I then came across this article and saw the comment from Mirrh regarding a program called Sendori blocking the LSP. No idea how it got on my computer but there it was and removing it fixed the issue.

If the article doesn't work just check your Programs and uninstall Sendori if you see it.

process.start() arguments

To diagnose better, you can capture the standard output and standard error streams of the external program, in order to see what output was generated and why it might not be running as expected.

Look up:

If you set each of those to true, then you can later call process.StandardOutput.ReadToEnd() and process.StandardError.ReadToEnd() to get the output into string variables, which you can easily inspect under the debugger, or output to trace or your log file.

Convert audio files to mp3 using ffmpeg

For batch processing with files in folder aiming for 190 VBR and file extension = .mp3 instead of .ac3.mp3 you can use the following code

Change .ac3 to whatever the source audio format is.

ffmpeg mp3 settings

for f in *.ac3 ; do ffmpeg -i "$f" -acodec libmp3lame -q:a 2 "${f%.*}.mp3"; done

Python Unicode Encode Error

Likely, your problem is that you parsed it okay, and now you're trying to print the contents of the XML and you can't because theres some foreign Unicode characters. Try to encode your unicode string as ascii first:

unicodeData.encode('ascii', 'ignore')

the 'ignore' part will tell it to just skip those characters. From the python docs:

>>> # Python 2: u = unichr(40960) + u'abcd' + unichr(1972)
>>> u = chr(40960) + u'abcd' + chr(1972)
>>> u.encode('utf-8')
'\xea\x80\x80abcd\xde\xb4'
>>> u.encode('ascii')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode character '\ua000' in position 0: ordinal not in range(128)
>>> u.encode('ascii', 'ignore')
'abcd'
>>> u.encode('ascii', 'replace')
'?abcd?'
>>> u.encode('ascii', 'xmlcharrefreplace')
'&#40960;abcd&#1972;'

You might want to read this article: http://www.joelonsoftware.com/articles/Unicode.html, which I found very useful as a basic tutorial on what's going on. After the read, you'll stop feeling like you're just guessing what commands to use (or at least that happened to me).

Python "string_escape" vs "unicode_escape"

According to my interpretation of the implementation of unicode-escape and the unicode repr in the CPython 2.6.5 source, yes; the only difference between repr(unicode_string) and unicode_string.encode('unicode-escape') is the inclusion of wrapping quotes and escaping whichever quote was used.

They are both driven by the same function, unicodeescape_string. This function takes a parameter whose sole function is to toggle the addition of the wrapping quotes and escaping of that quote.

Return multiple values in JavaScript?

Well we can not exactly do what your trying. But something likely to below can be done.

function multiReturnValues(){
    return {x:10,y:20};
}

Then when calling the method

const {x,y} = multiReturnValues();

console.log(x) ---> 10
console.log(y) ---> 20

HTML5 video (mp4 and ogv) problems in Safari and Firefox - but Chrome is all good

Just need to change one letter:), rename 640x360.ogv to 640x360.ogg, it will work for all the 3 browers.

Using FFmpeg in .net?

You can use this nuget package:

Install-Package Xabe.FFmpeg

I'm trying to make easy to use, cross-platform FFmpeg wrapper.

You can find more information about this at Xabe.FFmpeg

Convert Unicode to ASCII without errors in Python

Looks like you are using python 2.x. Python 2.x defaults to ascii and it doesn’t know about Unicode. Hence the exception.

Just paste the below line after shebang, it will work

# -*- coding: utf-8 -*-

c# Image resizing to different size while preserving aspect ratio

Just generalizing it down to aspect ratios and sizes, image stuff can be done outside of this function

public static d.RectangleF ScaleRect(d.RectangleF dest, d.RectangleF src, 
  bool keepWidth, bool keepHeight)  
{
    d.RectangleF destRect = new d.RectangleF();

    float sourceAspect = src.Width / src.Height;
    float destAspect = dest.Width / dest.Height;

    if (sourceAspect > destAspect)
    {
        // wider than high keep the width and scale the height
        destRect.Width = dest.Width;
        destRect.Height = dest.Width / sourceAspect;

        if (keepHeight)
        {
            float resizePerc = dest.Height / destRect.Height;
            destRect.Width = dest.Width * resizePerc;
            destRect.Height = dest.Height;
        }
    }
    else
    {
        // higher than wide – keep the height and scale the width
        destRect.Height = dest.Height;
        destRect.Width = dest.Height * sourceAspect;

        if (keepWidth)
        {
            float resizePerc = dest.Width / destRect.Width;
            destRect.Width = dest.Width;
            destRect.Height = dest.Height * resizePerc;
        }

    }

    return destRect;
}

Convert a video to MP4 (H.264/AAC) with ffmpeg

You need to recompile ffmpeg (from source) so that it supports x264. If you follow the instructions in this page, then you will be able to peform any kind of conversion you want.

How can I make a multipart/form-data POST request using Java?

httpcomponents-client-4.0.1 worked for me. However, I had to add the external jar apache-mime4j-0.6.jar (org.apache.james.mime4j) otherwise reqEntity.addPart("bin", bin); would not compile. Now it's working like charm.

Qt jpg image display

I understand your frustration the " Graphics view widget" is not the best way to do this, yes it can be done, but it's almost exactly the same as using a label ( for what you want any way) now all the ways listed do work but...

For you and any one else that may come across this question he easiest way to do it ( what you're asking any way ) is this.

QPixmap pix("Path\\path\\entername.jpeg");
    ui->label->setPixmap(pix);

}

"Unicode Error "unicodeescape" codec can't decode bytes... Cannot open text files in Python 3

I had same error, just uninstalled and installed again the numpy package, that worked!

A generic error occurred in GDI+, JPEG Image to MemoryStream

I also get this error because i'm trying to save images with the same name of previous saved images.

Make sure that you don't save images with duplicate name.

Use for thar for example a 'Random' function (How does C#'s random number generator work?) or for example generate a Guid (http://betterexplained.com/articles/the-quick-guide-to-guids/)

Write to UTF-8 file in Python

I use the file *nix command to convert a unknown charset file in a utf-8 file

# -*- encoding: utf-8 -*-

# converting a unknown formatting file in utf-8

import codecs
import commands

file_location = "jumper.sub"
file_encoding = commands.getoutput('file -b --mime-encoding %s' % file_location)

file_stream = codecs.open(file_location, 'r', file_encoding)
file_output = codecs.open(file_location+"b", 'w', 'utf-8')

for l in file_stream:
    file_output.write(l)

file_stream.close()
file_output.close()

Reading a UTF8 CSV file with Python

Worth noting that if nothing worked for you, you may have forgotten to escape your path.
For example, this code:

f = open("C:\Some\Path\To\file.csv")

Would result in an error:

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

To fix, simply do:

f = open("C:\\Some\\Path\\To\\file.csv")

How to create a thread?

Update The currently suggested way to start a Task is simply using Task.Run()

Task.Run(() => foo());

Note that this method is described as the best way to start a task see here

Previous answer

I like the Task Factory from System.Threading.Tasks. You can do something like this:

Task.Factory.StartNew(() => 
{
    // Whatever code you want in your thread
});

Note that the task factory gives you additional convenience options like ContinueWith:

Task.Factory.StartNew(() => {}).ContinueWith((result) => 
{
    // Whatever code should be executed after the newly started thread.
});

Also note that a task is a slightly different concept than threads. They nicely fit with the async/await keywords, see here.

Converting from a string to boolean in Python?

here's a hairy, built in way to get many of the same answers. Note that although python considers "" to be false and all other strings to be true, TCL has a very different idea about things.

>>> import Tkinter
>>> tk = Tkinter.Tk()
>>> var = Tkinter.BooleanVar(tk)
>>> var.set("false")
>>> var.get()
False
>>> var.set("1")
>>> var.get()
True
>>> var.set("[exec 'rm -r /']")
>>> var.get()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 324, in get
    return self._tk.getboolean(self._tk.globalgetvar(self._name))
_tkinter.TclError: 0expected boolean value but got "[exec 'rm -r /']"
>>>

A good thing about this is that it is fairly forgiving about the values you can use. It's lazy about turning strings into values, and it's hygenic about what it accepts and rejects(notice that if the above statement were given at a tcl prompt, it would erase the users hard disk).

the bad thing is that it requires that Tkinter be available, which is usually, but not universally true, and more significantly, requires that a Tk instance be created, which is comparatively heavy.

What is considered true or false depends on the behavior of the Tcl_GetBoolean, which considers 0, false, no and off to be false and 1, true, yes and on to be true, case insensitive. Any other string, including the empty string, cause an exception.

How to get image height and width using java?

You can get width and height of image with BufferedImage object using java.

public void setWidthAndHeightImage(FileUploadEvent event){
    byte[] imageTest = event.getFile().getContents();
                baiStream = new ByteArrayInputStream(imageTest );
                BufferedImage bi = ImageIO.read(baiStream);
                //get width and height of image
                int imageWidth = bi.getWidth();
                int imageHeight = bi.getHeight();
    }

Setting the correct encoding when piping stdout in Python

I had a similar issue last week. It was easy to fix in my IDE (PyCharm).

Here was my fix:

Starting from PyCharm menu bar: File -> Settings... -> Editor -> File Encodings, then set: "IDE Encoding", "Project Encoding" and "Default encoding for properties files" ALL to UTF-8 and she now works like a charm.

Hope this helps!

How do you embed binary data in XML?

Base64 is indeed the right answer but CDATA is not, that's basically saying: "this could be anything", however it must not be just anything, it has to be Base64 encoded binary data. XML Schema defines Base 64 binary as a primitive datatype which you can use in your xsd.

Python, Unicode, and the Windows console

Just enter this code in command line before executing python script:

chcp 65001 & set PYTHONIOENCODING=utf-8

ImportError: No module named enum

I ran into this same issue trying to install the dbf package in Python 2.7. The problem is that the enum package wasn't added to Python until version 3.4.

It has been backported to versions 3.3, 3.2, 3.1, 2.7, 2.6, 2.5, and 2.4, you just need the package from here: https://pypi.python.org/pypi/enum34#downloads

Missing MVC template in Visual Studio 2015

In my case that happened when uninstalling AspNet 5 RC1 Update 1 to update it for .Net Core 1.0 RC2. so I installed Visual Studio 2015 update 2, selected Microsoft Web Developer tools and everything went back to normal.

How to use filesaver.js

For people who want to load it in the console :

var s = document.createElement('script');
s.type = 'text/javascript';
s.src = 'https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.min.js';
document.body.appendChild(s);

Then :

saveAs(new Blob([data], {type: "application/octet-stream ;charset=utf-8"}), "video.ts")

File will be save when you're out of a breakpoint (at least on Chrome)

How to fix: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found

Just install the latest version from nondefault repository:

$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test
$ sudo apt-get update
$ sudo apt-get install libstdc++6-4.7-dev

How to encode text to base64 in python

Remember to import base64 and that b64encode takes bytes as an argument.

import base64
base64.b64encode(bytes('your string', 'utf-8'))

How can I use grep to find a word inside a folder?

grep -R "string" /directory/

-R follows also symlinks when -r does not.

WCF gives an unsecured or incorrectly secured fault error

I had to change the SecurityMode to Message (WSHttpBinding), before it worked. i.e.

_wcf = new ServiceRequestClient(new WSHttpBinding(SecurityMode.Message),                     
       new EndpointAddress(_wcfRequestServerAddress));

Sorting objects by property values

A version of Cheeso solution with reverse sorting, I also removed the ternary expressions for lack of clarity (but this is personal taste).

function(prop, reverse) {
  return function(a, b) {
    if (typeof a[prop] === 'number') {
      return (a[prop] - b[prop]);
    }

    if (a[prop] < b[prop]) {
      return reverse ? 1 : -1;
    }

    if (a[prop] > b[prop]) {
      return reverse ? -1 : 1;
    }

    return 0;
  };
};

Change one value based on another value in pandas

The original question addresses a specific narrow use case. For those who need more generic answers here are some examples:

Creating a new column using data from other columns

Given the dataframe below:

import pandas as pd
import numpy as np

df = pd.DataFrame([['dog', 'hound', 5],
                   ['cat', 'ragdoll', 1]],
                  columns=['animal', 'type', 'age'])

In[1]:
Out[1]:
  animal     type  age
----------------------
0    dog    hound    5
1    cat  ragdoll    1

Below we are adding a new description column as a concatenation of other columns by using the + operation which is overridden for series. Fancy string formatting, f-strings etc won't work here since the + applies to scalars and not 'primitive' values:

df['description'] = 'A ' + df.age.astype(str) + ' years old ' \
                    + df.type + ' ' + df.animal

In [2]: df
Out[2]:
  animal     type  age                description
-------------------------------------------------
0    dog    hound    5    A 5 years old hound dog
1    cat  ragdoll    1  A 1 years old ragdoll cat

We get 1 years for the cat (instead of 1 year) which we will be fixing below using conditionals.

Modifying an existing column with conditionals

Here we are replacing the original animal column with values from other columns, and using np.where to set a conditional substring based on the value of age:

# append 's' to 'age' if it's greater than 1
df.animal = df.animal + ", " + df.type + ", " + \
    df.age.astype(str) + " year" + np.where(df.age > 1, 's', '')

In [3]: df
Out[3]:
                 animal     type  age
-------------------------------------
0   dog, hound, 5 years    hound    5
1  cat, ragdoll, 1 year  ragdoll    1

Modifying multiple columns with conditionals

A more flexible approach is to call .apply() on an entire dataframe rather than on a single column:

def transform_row(r):
    r.animal = 'wild ' + r.type
    r.type = r.animal + ' creature'
    r.age = "{} year{}".format(r.age, r.age > 1 and 's' or '')
    return r

df.apply(transform_row, axis=1)

In[4]:
Out[4]:
         animal            type      age
----------------------------------------
0    wild hound    dog creature  5 years
1  wild ragdoll    cat creature   1 year

In the code above the transform_row(r) function takes a Series object representing a given row (indicated by axis=1, the default value of axis=0 will provide a Series object for each column). This simplifies processing since we can access the actual 'primitive' values in the row using the column names and have visibility of other cells in the given row/column.

How to add an image to an svg container using D3.js

My team also wanted to add images inside d3-drawn circles, and came up with the following (fiddle):

index.html:

<!doctype html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="timeline.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.js"></script>
  <script src="https://code.jquery.com/jquery-2.2.4.js"
    integrity="sha256-iT6Q9iMJYuQiMWNd9lDyBUStIq/8PuOW33aOqmvFpqI="
    crossorigin="anonymous"></script>
  <script src="./timeline.js"></script>
</head>
  <body>
    <div class="timeline"></div>
  </body>
</html>

timeline.css:

.axis path,
.axis line,
.tick line,
.line {
  fill: none;
  stroke: #000000;
  stroke-width: 1px;
}

timeline.js:

// container target
var elem = ".timeline";

var props = {
  width: 1000,
  height: 600,
  class: "timeline-point",

  // margins
  marginTop: 100,
  marginRight: 40,
  marginBottom: 100,
  marginLeft: 60,

  // data inputs
  data: [
    {
      x: 10,
      y: 20,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "a"
    },
    {
      x: 20,
      y: 10,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "b"
    },
    {
      x: 60,
      y: 30,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "c"
    },
    {
      x: 40,
      y: 30,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "d"
    },
    {
      x: 50,
      y: 70,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "e"
    },
    {
      x: 30,
      y: 50,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "f"
    },
    {
      x: 50,
      y: 60,
      key: "a",
      image: "https://unsplash.it/300/300",
      id: "g"
    }
  ],

  // y label
  yLabel: "Y label",
  yLabelLength: 50,

  // axis ticks
  xTicks: 10,
  yTicks: 10

}

// component start
var Timeline = {};

/***
*
* Create the svg canvas on which the chart will be rendered
*
***/

Timeline.create = function(elem, props) {

  // build the chart foundation
  var svg = d3.select(elem).append('svg')
      .attr('width', props.width)
      .attr('height', props.height);

  var g = svg.append('g')
      .attr('class', 'point-container')
      .attr("transform",
              "translate(" + props.marginLeft + "," + props.marginTop + ")");

  var g = svg.append('g')
      .attr('class', 'line-container')
      .attr("transform", 
              "translate(" + props.marginLeft + "," + props.marginTop + ")");

  var xAxis = g.append('g')
    .attr("class", "x axis")
    .attr("transform", "translate(0," + (props.height - props.marginTop - props.marginBottom) + ")");

  var yAxis = g.append('g')
    .attr("class", "y axis");

  svg.append("text")
    .attr("class", "y label")
    .attr("text-anchor", "end")
    .attr("y", 1)
    .attr("x", 0 - ((props.height - props.yLabelLength)/2) )
    .attr("dy", ".75em")
    .attr("transform", "rotate(-90)")
    .text(props.yLabel);

  // add placeholders for the axes
  this.update(elem, props);
};

/***
*
* Update the svg scales and lines given new data
*
***/

Timeline.update = function(elem, props) {
  var self = this;
  var domain = self.getDomain(props);
  var scales = self.scales(elem, props, domain);

  self.drawPoints(elem, props, scales);
};


/***
*
* Use the range of values in the x,y attributes
* of the incoming data to identify the plot domain
*
***/

Timeline.getDomain = function(props) {
  var domain = {};
  domain.x = props.xDomain || d3.extent(props.data, function(d) { return d.x; });
  domain.y = props.yDomain || d3.extent(props.data, function(d) { return d.y; });
  return domain;
};


/***
*
* Compute the chart scales
*
***/

Timeline.scales = function(elem, props, domain) {

  if (!domain) {
    return null;
  }

  var width = props.width - props.marginRight - props.marginLeft;
  var height = props.height - props.marginTop - props.marginBottom;

  var x = d3.scale.linear()
    .range([0, width])
    .domain(domain.x);

  var y = d3.scale.linear()
    .range([height, 0])
    .domain(domain.y);

  return {x: x, y: y};
};


/***
*
* Create the chart axes
*
***/

Timeline.axes = function(props, scales) {

  var xAxis = d3.svg.axis()
    .scale(scales.x)
    .orient("bottom")
    .ticks(props.xTicks)
    .tickFormat(d3.format("d"));

  var yAxis = d3.svg.axis()
    .scale(scales.y)
    .orient("left")
    .ticks(props.yTicks);

  return {
    xAxis: xAxis,
    yAxis: yAxis
  }
};


/***
*
* Use the general update pattern to draw the points
*
***/

Timeline.drawPoints = function(elem, props, scales, prevScales, dispatcher) {
  var g = d3.select(elem).selectAll('.point-container');
  var color = d3.scale.category10();

  // add images
  var image = g.selectAll('.image')
    .data(props.data)

  image.enter()
    .append("pattern")
    .attr("id", function(d) {return d.id})
    .attr("class", "svg-image")
    .attr("x", "0")
    .attr("y", "0")
    .attr("height", "70px")
    .attr("width", "70px")
    .append("image")
      .attr("x", "0")
      .attr("y", "0")
      .attr("height", "70px")
      .attr("width", "70px")
      .attr("xlink:href", function(d) {return d.image})

  var point = g.selectAll('.point')
    .data(props.data);

  // enter
  point.enter()
    .append("circle")
      .attr("class", "point")
      .on('mouseover', function(d) {
        d3.select(elem).selectAll(".point").classed("active", false);
        d3.select(this).classed("active", true);
        if (props.onMouseover) {
          props.onMouseover(d)
        };
      })
      .on('mouseout', function(d) {
        if (props.onMouseout) {
          props.onMouseout(d)
        };
      })

  // enter and update
  point.transition()
    .duration(1000)
    .attr("cx", function(d) {
      return scales.x(d.x); 
    })
    .attr("cy", function(d) { 
      return scales.y(d.y); 
    })
    .attr("r", 30)
    .style("stroke", function(d) {
      if (props.pointStroke) {
        return d.color = props.pointStroke;
      } else {
        return d.color = color(d.key);
      }
    })
    .style("fill", function(d) {
      if (d.image) {
        return ("url(#" + d.id + ")");
      }

      if (props.pointFill) {
        return d.color = props.pointFill;
      } else {
        return d.color = color(d.key);
      }
    });

  // exit
  point.exit()
    .remove();

  // update the axes
  var axes = this.axes(props, scales);
  d3.select(elem).selectAll('g.x.axis')
    .transition()
    .duration(1000)
    .call(axes.xAxis);

  d3.select(elem).selectAll('g.y.axis')
    .transition()
    .duration(1000)
    .call(axes.yAxis);
};


$(document).ready(function() {
  Timeline.create(elem, props);
})

Get data from fs.readFile

The following is function would work for async wrap or promise then chains

const readFileAsync =  async (path) => fs.readFileSync(path, 'utf8');

USB Debugging option greyed out

Connect the phone to a PC, make sure your developer options are enabled. Then, connection type must be MTP or File Transfer. Charge only does not allow USB debugging(disables the option).

Delete files older than 3 months old in a directory using .NET

            system.IO;

             List<string> DeletePath = new List<string>();
            DirectoryInfo info = new DirectoryInfo(Server.MapPath("~\\TempVideos"));
            FileInfo[] files = info.GetFiles().OrderBy(p => p.CreationTime).ToArray();
            foreach (FileInfo file in files)
            {
                DateTime CreationTime = file.CreationTime;
                double days = (DateTime.Now - CreationTime).TotalDays;
                if (days > 7)
                {
                    string delFullPath = file.DirectoryName + "\\" + file.Name;
                    DeletePath.Add(delFullPath);
                }
            }
            foreach (var f in DeletePath)
            {
                if (File.Exists(F))
                {
                    File.Delete(F);
                }
            }

use in page load or webservice or any other use.

My concept is evrry 7 day i have to delete folder file without using DB

ERROR in ./node_modules/css-loader?

you have to update your node.js and angular/cli.If you update these two things then your project has angular.json file instead of angular-cli.json file.Then add css file into angular.json file.If you add css file into angular-cli.json file instead of angular.json file,then errors are occured.

org.hibernate.MappingException: Unknown entity

You should call .addAnnotatedClass(Message.class) on your AnnotationConfiguration.

If you want your entities to be auto-discovered, use EntityManager (JPA)

(Reference)

Update: it appears you have listed the class in hibernate.cfg.xml. So auto-discovery is not necessary. Btw, try javax.persistence.Entity

How to find good looking font color if background color is known?

Personally I don't think we can find out an algorithm to calculate the most matched text color by specifying the background color.

I think currently the artist should have a list of color pairs which has good reading quality, we can add them to a table, and set one of these pairs randomly as our reading theme...

this is much reasonable, and we won't get ugly color pairs....

In Matplotlib, what does the argument mean in fig.add_subplot(111)?

fig.add_subplot(ROW,COLUMN,POSITION)

ROW=number of rows
COLUMN=number of columns
POSITION= position of the graph you are plotting

Examples

`fig.add_subplot(111)` #There is only one subplot or graph  
`fig.add_subplot(211)`  *and*  `fig.add_subplot(212)`

There are total 2 rows,1 column therefore 2 subgraphs can be plotted. Its location is 1st. There are total 2 rows,1 column therefore 2 subgraphs can be plotted.Its location is 2nd

Problems when trying to load a package in R due to rJava

Answer in link resolved my issue.

Before resolution, I tried by adding JAVA_HOME to windows environments. It resolved this error but created another issue. The solution in above link resolves this issue without creating additional issues.

How to get the url parameters using AngularJS

When using angularjs with express

On my example I was using angularjs with express doing the routing so using $routeParams would mess up with my routing. I used the following code to get what I was expecting:

const getParameters = (temp, path) => {
  const parameters = {};
  const tempParts = temp.split('/');
  const pathParts = path.split('/');
  for (let i = 0; i < tempParts.length; i++) {
    const element = tempParts[i];
    if(element.startsWith(':')) {
      const key = element.substring(1,element.length);
      parameters[key] = pathParts[i];
    }
  }
  return parameters;
};

This receives a URL template and the path of the given location. The I just call it with:

const params = getParameters('/:table/:id/visit/:place_id/on/:interval/something', $location.path());

Putting it all together my controller is:

.controller('TestController', ['$scope', function($scope, $window) {
  const getParameters = (temp, path) => {
    const parameters = {};
    const tempParts = temp.split('/');
    const pathParts = path.split('/');
    for (let i = 0; i < tempParts.length; i++) {
      const element = tempParts[i];
      if(element.startsWith(':')) {
        const key = element.substring(1,element.length);
        parameters[key] = pathParts[i];
      }
    }
    return parameters;
  };

const params = getParameters('/:table/:id/visit/:place_id/on/:interval/something', $window.location.pathname);
}]);

The result will be:

{ table: "users", id: "1", place_id: "43", interval: "week" }

Hope this helps someone out there!

How can I get form data with JavaScript/jQuery?

This will append all form fields to the JavaScript object "res":

var res = {};
$("#form input, #form select, #form textarea").each(function(i, obj) {
    res[obj.name] = $(obj).val();
})

How to display an alert box from C# in ASP.NET?

After insertion code,

ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('Record Inserted Successfully')", true);

Force uninstall of Visual Studio

So Soumyaansh's Revo Uninstaller Pro fix worked for me :) ( After 2 days of troubleshooting other options {screams internally 😀} ).

I did run into the an issue with his method though, "Could not find a suitable SDK to target" even though I selected to install Visual Studio with custom settings and selected the SDK I wanted to install. You may need to download the Windows 10 Standalone SDK to resolved this, in order to develop UWP apps if you see this same error after reinstalling Visual Studio.

To do this

Uninstall any Windows 10 SDKs that me on the system (the naming schem for them looks like Windows 10 SDK (WINDOWS_VERSION_NUMBER_HERE) -> Windows 10 SDK (14393) etc . . .). If there are no SDKs on your system go to step 2!
All that's left is to download the SDKs you want by Checking out the SDK Archive for all available SDKs and you should be good to go in developing for the UWP!

How do you find the sum of all the numbers in an array in Java?

int sum = 0;

for (int i = 0; i < yourArray.length; i++)
{
  sum = sum + yourArray[i];
}

How to hide a div after some time period?

setTimeout('$("#someDivId").hide()',1500);

What does LINQ return when the results are empty

It will return an empty enumerable. It wont be null. You can sleep sound :)

JQuery wait for page to finish loading before starting the slideshow?

You probably already know about $(document).ready(...). What you need is a preloading mechanism; something that fetches data (text or images or whatever) before showing it off. This can make a site feel much more professional.

Take a look at jQuery.Preload (there are others). jQuery.Preload has several ways of triggering preloading, and also provides callback functionality (when the image is preloaded, then show it). I have used it heavily, and it works great.

Here's how easy it is to get started with jQuery.Preload:

$(function() {
  // First get the preload fetches under way
  $.preload(["images/button-background.png", "images/button-highlight.png"]);
  // Then do anything else that you would normally do here
  doSomeStuff();
});

How can I read SMS messages from the device programmatically in Android?

String WHERE_CONDITION = unreadOnly ? SMS_READ_COLUMN + " = 0" : null;

changed by:

String WHERE_CONDITION = unreadOnly ? SMS_READ_COLUMN + " = 0 " : SMS_READ_COLUMN + " = 1 ";

Right to Left support for Twitter Bootstrap 3

you can use my project i create bootstrap 3 rtl with sass and gulp so you can easely customize it https://github.com/z-avanes/bootstrap3-rtl

CMake not able to find OpenSSL library

sudo apt install libssl-dev works on ubuntu 18.04.

Extracting Ajax return data in jQuery

You may also use the jQuery context parameter. Link to docs

Selector Context

By default, selectors perform their searches within the DOM starting at the document root. However, an alternate context can be given for the search by using the optional second parameter to the $() function

Therefore you could also have:

success: function(data){
    var oneval = $('#one',data).text();
    var subval = $('#sub',data).text();
}

Convert string to date in Swift

In swift4,

    var Msg_Date_ = "2019-03-30T05:30:00+0000"

    let dateFormatterGet = DateFormatter()
    dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
    let dateFormatterPrint = DateFormatter()
    dateFormatterPrint.dateFormat = "MMM dd yyyy h:mm a"  //"MMM d, h:mm a" for  Sep 12, 2:11 PM
    let datee = dateFormatterGet.date(from: Msg_Date_)
    Msg_Date_ =  dateFormatterPrint.string(from: datee ?? Date())

    print(Msg_Date_)

//output :- Mar 30 2019 05:30 PM

How to get WooCommerce order details

$order = new WC_Order(get_query_var('order-received'));

Peak signal detection in realtime timeseries data

Here is an altered Fortran version of the z-score algorithm. It is altered specifically for peak (resonance) detection in transfer functions in frequency space (Each change has a small comment in code).

The first modification gives a warning to the user if there is a resonance near the lower bound of the input vector, indicated by a standard deviation higher than a certain threshold (10% in this case). This simply means the signal is not flat enough for the detection initializing the filters properly.

The second modification is that only the highest value of a peak is added to the found peaks. This is reached by comparing each found peak value to the magnitude of its (lag) predecessors and its (lag) successors.

The third change is to respect that resonance peaks usually show some form of symmetry around the resonance frequency. So it is natural to calculate the mean and std symmetrically around the current data point (rather than just for the predecessors). This results in a better peak detection behavior.

The modifications have the effect that the whole signal has to be known to the function beforehand which is the usual case for resonance detection (something like the Matlab Example of Jean-Paul where the data points are generated on the fly won't work).

function PeakDetect(y,lag,threshold, influence)
    implicit none
    ! Declaring part
    real, dimension(:), intent(in) :: y
    integer, dimension(size(y)) :: PeakDetect
    real, dimension(size(y)) :: filteredY, avgFilter, stdFilter
    integer :: lag, ii
    real :: threshold, influence

    ! Executing part
    PeakDetect = 0
    filteredY = 0.0
    filteredY(1:lag+1) = y(1:lag+1)
    avgFilter = 0.0
    avgFilter(lag+1) = mean(y(1:2*lag+1))
    stdFilter = 0.0
    stdFilter(lag+1) = std(y(1:2*lag+1))

    if (stdFilter(lag+1)/avgFilter(lag+1)>0.1) then ! If the coefficient of variation exceeds 10%, the signal is too uneven at the start, possibly because of a peak.
        write(unit=*,fmt=1001)
1001        format(1X,'Warning: Peak detection might have failed, as there may be a peak at the edge of the frequency range.',/)
    end if
    do ii = lag+2, size(y)
        if (abs(y(ii) - avgFilter(ii-1)) > threshold * stdFilter(ii-1)) then
            ! Find only the largest outstanding value which is only the one greater than its predecessor and its successor
            if (y(ii) > avgFilter(ii-1) .AND. y(ii) > y(ii-1) .AND. y(ii) > y(ii+1)) then
                PeakDetect(ii) = 1
            end if
            filteredY(ii) = influence * y(ii) + (1 - influence) * filteredY(ii-1)
        else
            filteredY(ii) = y(ii)
        end if
        ! Modified with respect to the original code. Mean and standard deviation are calculted symmetrically around the current point
        avgFilter(ii) = mean(filteredY(ii-lag:ii+lag))
        stdFilter(ii) = std(filteredY(ii-lag:ii+lag))
    end do
end function PeakDetect

real function mean(y)
    !> @brief Calculates the mean of vector y
    implicit none
    ! Declaring part
    real, dimension(:), intent(in) :: y
    integer :: N
    ! Executing part
    N = max(1,size(y))
    mean = sum(y)/N
end function mean

real function std(y)
    !> @brief Calculates the standard deviation of vector y
    implicit none
    ! Declaring part
    real, dimension(:), intent(in) :: y
    integer :: N
    ! Executing part
    N = max(1,size(y))
    std = sqrt((N*dot_product(y,y) - sum(y)**2) / (N*(N-1)))
end function std

For my application the algorithm works like a charm!

Pass parameter to EventHandler

If I understand your problem correctly, you are calling a method instead of passing it as a parameter. Try the following:

myTimer.Elapsed += PlayMusicEvent;

where

public void PlayMusicEvent(object sender, ElapsedEventArgs e)
{
    music.player.Stop();
    System.Timers.Timer myTimer = (System.Timers.Timer)sender;
    myTimer.Stop();
}

But you need to think about where to store your note.

Memory address of an object in C#

Instead of this code, you should call GetHashCode(), which will return a (hopefully-)unique value for each instance.

You can also use the ObjectIDGenerator class, which is guaranteed to be unique.

Twitter Bootstrap 3 Sticky Footer

Based on Jek-fdrv's answer, I added an .on('resize', function() to make sure it works on every device and every resolution:

$(window).on('resize', function() {
    if ($(document).height() <= $(window).height()) {
        $('footer').addClass("navbar-fixed-bottom");
    } else {
        $('footer').removeClass("navbar-fixed-bottom");
    }
});

Pass a datetime from javascript to c# (Controller)

Try to use toISOString(). It returns string in ISO8601 format.

GET method

javascript

$.get('/example/doGet?date=' + new Date().toISOString(), function (result) {
    console.log(result);
});

[HttpGet]
public JsonResult DoGet(DateTime date)
{
    return Json(date.ToString(), JsonRequestBehavior.AllowGet);
}

POST method

javascript

$.post('/example/do', { date: date.toISOString() }, function (result) {
    console.log(result);
});

[HttpPost]
public JsonResult Do(DateTime date)
{
     return Json(date.ToString());
}

Set a div width, align div center and text align left

Set auto margins on the inner div:

<div id="header" style="width:864px;">
    <div id="centered" style="margin: 0 auto; width:855px;"></div>
</div>

Alternatively, text align center the parent, and force text align left on the inner div:

<div id="header" style="width:864px;text-align: center;">
    <div id="centered" style="text-align: left; width:855px;"></div>
</div>

Android SDK is missing, out of date, or is missing templates. Please ensure you are using SDK version 22 or later

Create SDK folder at \Android\Sdk
Close any project which is already open in Android studio

Android Studio setup wizard will appear and perform the needed installation.

How to create text file and insert data to that file on Android

First create a Project With PdfCreation in Android Studio

Then Follow below steps:

1.Download itextpdf-5.3.2.jar library from this link [https://sourceforge.net/projects/itext/files/iText/iText5.3.2/][1] and then
2.Add to app>libs>itextpdf-5.3.2.jar
3.Right click on jar file then click on add to library
4. Document document = new Document(PageSize.A4); // Create Directory in External Storage
        String root = Environment.getExternalStorageDirectory().toString();
        File myDir = new File(root + "/PDF");
        System.out.print(myDir.toString());
        myDir.mkdirs(); // Create Pdf Writer for Writting into New Created Document
        try {
            PdfWriter.getInstance(document, new FileOutputStream(FILE));
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } // Open Document for Writting into document
        document.open(); // User Define Method
        addMetaData(document);
        try {
            addTitlePage(document);
        } catch (DocumentException e) {
            e.printStackTrace();
        } // Close Document after writting all content
        document.close();

5.   public void addMetaData(Document document)
    {
        document.addTitle("RESUME");
        document.addSubject("Person Info");
        document.addKeywords("Personal, Education, Skills");
                document.addAuthor("TAG");
        document.addCreator("TAG");
    }
    public void addTitlePage(Document document) throws DocumentException
    { // Font Style for Document
        Font catFont = new Font(Font.FontFamily.TIMES_ROMAN, 18, Font.BOLD);
        Font titleFont = new Font(Font.FontFamily.TIMES_ROMAN, 22, Font.BOLD
                | Font.UNDERLINE, BaseColor.GRAY);
        Font smallBold = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.BOLD);
        Font normal = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.NORMAL); // Start New Paragraph
        Paragraph prHead = new Paragraph(); // Set Font in this Paragraph
        prHead.setFont(titleFont); // Add item into Paragraph
        prHead.add("RESUME – Name\n"); // Create Table into Document with 1 Row
        PdfPTable myTable = new PdfPTable(1); // 100.0f mean width of table is same as Document size
        myTable.setWidthPercentage(100.0f); // Create New Cell into Table
        PdfPCell myCell = new PdfPCell(new Paragraph(""));
        myCell.setBorder(Rectangle.BOTTOM); // Add Cell into Table
        myTable.addCell(myCell);
        prHead.setFont(catFont);
        prHead.add("\nName1 Name2\n");
        prHead.setAlignment(Element.ALIGN_CENTER); // Add all above details into Document
        document.add(prHead);
        document.add(myTable);
        document.add(myTable); // Now Start another New Paragraph
        Paragraph prPersinalInfo = new Paragraph();
        prPersinalInfo.setFont(smallBold);
        prPersinalInfo.add("Address 1\n");
        prPersinalInfo.add("Address 2\n");
        prPersinalInfo.add("City: SanFran. State: CA\n");
        prPersinalInfo.add("Country: USA Zip Code: 000001\n");
        prPersinalInfo.add("Mobile: 9999999999 Fax: 1111111 Email: [email protected] \n");
        prPersinalInfo.setAlignment(Element.ALIGN_CENTER);
        document.add(prPersinalInfo);
        document.add(myTable);
        document.add(myTable);
        Paragraph prProfile = new Paragraph();
        prProfile.setFont(smallBold);
        prProfile.add("\n \n Profile : \n ");
        prProfile.setFont(normal);
        prProfile.add("\nI am Mr. XYZ. I am Android Application Developer at TAG.");
        prProfile.setFont(smallBold);
        document.add(prProfile); // Create new Page in PDF
        document.newPage();
    }

Maven: mvn command not found

I tried solutions from other threads. Adding M2 and M2_HOME at System variables, and even at User variables. Running cmd as admin. None of the methods worked.

But today I added entire path to maven bin to my System variables "PATH" (C:\Program Files (x86)\Apache Software Foundation\apache-maven-3.1.0\bin) besides other paths, and so far it's working good. Hopefully it'll stay that way.

Collections.emptyList() returns a List<Object>?

the emptyList method has this signature:

public static final <T> List<T> emptyList()

That <T> before the word List means that it infers the value of the generic parameter T from the type of variable the result is assigned to. So in this case:

List<String> stringList = Collections.emptyList();

The return value is then referenced explicitly by a variable of type List<String>, so the compiler can figure it out. In this case:

setList(Collections.emptyList());

There's no explicit return variable for the compiler to use to figure out the generic type, so it defaults to Object.

jQuery attr() change img src

You remove the original image here:

newImg.animate(css, SPEED, function() {
    img.remove();
    newImg.removeClass('morpher');
    (callback || function() {})();
});

And all that's left behind is newImg. Then you reset link references the image using #rocket:

$("#rocket").attr('src', ...

But your newImg doesn't have an id attribute let alone an id of rocket.

To fix this, you need to remove img and then set the id attribute of newImg to rocket:

newImg.animate(css, SPEED, function() {
    var old_id = img.attr('id');
    img.remove();
    newImg.attr('id', old_id);
    newImg.removeClass('morpher');
    (callback || function() {})();
});

And then you'll get the shiny black rocket back again: http://jsfiddle.net/ambiguous/W2K9D/

UPDATE: A better approach (as noted by mellamokb) would be to hide the original image and then show it again when you hit the reset button. First, change the reset action to something like this:

$("#resetlink").click(function(){
    clearInterval(timerRocket);
    $("#wrapper").css('top', '250px');
    $('.throbber, .morpher').remove(); // Clear out the new stuff.
    $("#rocket").show();               // Bring the original back.
});

And in the newImg.load function, grab the images original size:

var orig = {
    width: img.width(),
    height: img.height()
};

And finally, the callback for finishing the morphing animation becomes this:

newImg.animate(css, SPEED, function() {
    img.css(orig).hide();
    (callback || function() {})();
});

New and improved: http://jsfiddle.net/ambiguous/W2K9D/1/

The leaking of $('.throbber, .morpher') outside the plugin isn't the best thing ever but it isn't a big deal as long as it is documented.

How can I get client information such as OS and browser

There are two not bad libs for parsing user agent strings:

user-agent-utils - java only, reached end-of-life
ua-parser - multilanguage, archived
uap-java - java implementation of above, actively maintained

Threading pool similar to the multiprocessing Pool?

Yes, there is a threading pool similar to the multiprocessing Pool, however, it is hidden somewhat and not properly documented. You can import it by following way:-

from multiprocessing.pool import ThreadPool

Just I show you simple example

def test_multithread_stringio_read_csv(self):
        # see gh-11786
        max_row_range = 10000
        num_files = 100

        bytes_to_df = [
            '\n'.join(
                ['%d,%d,%d' % (i, i, i) for i in range(max_row_range)]
            ).encode() for j in range(num_files)]
        files = [BytesIO(b) for b in bytes_to_df]

        # read all files in many threads
        pool = ThreadPool(8)
        results = pool.map(self.read_csv, files)
        first_result = results[0]

        for result in results:
            tm.assert_frame_equal(first_result, result)

How do I find out my python path using python?

import sys
for a in sys.path:
    a.replace('\\\\','\\')
    print(a)

It will give all the paths ready for place in the Windows.

SQL Server NOLOCK and joins

Neither. You set the isolation level to READ UNCOMMITTED which is always better than giving individual lock hints. Or, better still, if you care about details like consistency, use snapshot isolation.

Scraping html tables into R data frames using the XML package

library(RCurl)
library(XML)

# Download page using RCurl
# You may need to set proxy details, etc.,  in the call to getURL
theurl <- "http://en.wikipedia.org/wiki/Brazil_national_football_team"
webpage <- getURL(theurl)
# Process escape characters
webpage <- readLines(tc <- textConnection(webpage)); close(tc)

# Parse the html tree, ignoring errors on the page
pagetree <- htmlTreeParse(webpage, error=function(...){})

# Navigate your way through the tree. It may be possible to do this more efficiently using getNodeSet
body <- pagetree$children$html$children$body 
divbodyContent <- body$children$div$children[[1]]$children$div$children[[4]]
tables <- divbodyContent$children[names(divbodyContent)=="table"]

#In this case, the required table is the only one with class "wikitable sortable"  
tableclasses <- sapply(tables, function(x) x$attributes["class"])
thetable  <- tables[which(tableclasses=="wikitable sortable")]$table

#Get columns headers
headers <- thetable$children[[1]]$children
columnnames <- unname(sapply(headers, function(x) x$children$text$value))

# Get rows from table
content <- c()
for(i in 2:length(thetable$children))
{
   tablerow <- thetable$children[[i]]$children
   opponent <- tablerow[[1]]$children[[2]]$children$text$value
   others <- unname(sapply(tablerow[-1], function(x) x$children$text$value)) 
   content <- rbind(content, c(opponent, others))
}

# Convert to data frame
colnames(content) <- columnnames
as.data.frame(content)

Edited to add:

Sample output

                     Opponent Played Won Drawn Lost Goals for Goals against  % Won
    1               Argentina     94  36    24   34       148           150  38.3%
    2                Paraguay     72  44    17   11       160            61  61.1%
    3                 Uruguay     72  33    19   20       127            93  45.8%
    ...

open link of google play store in mobile version android

Open app page on Google Play:

Intent intent = new Intent(Intent.ACTION_VIEW,
                Uri.parse("market://details?id=" + context.getPackageName()));
startActivity(intent);

How to read appSettings section in the web.config file?

ConfigurationManager.AppSettings["configFile"]

http://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager.appsettings.aspx

Incrementing a variable inside a Bash loop

Using the following 1 line command for changing many files name in linux using phrase specificity:

find -type f -name '*.jpg' | rename 's/holiday/honeymoon/'

For all files with the extension ".jpg", if they contain the string "holiday", replace it with "honeymoon". For instance, this command would rename the file "ourholiday001.jpg" to "ourhoneymoon001.jpg".

This example also illustrates how to use the find command to send a list of files (-type f) with the extension .jpg (-name '*.jpg') to rename via a pipe (|). rename then reads its file list from standard input.

ASP.NET / C#: DropDownList SelectedIndexChanged in server control not firing

I can't see that you're adding these controls to the control hierarchy. Try:

Controls.Add ( ddlCountries );
Controls.Add ( ddlStates );

Events won't be invoked unless the control is part of the control hierarchy.

No provider for TemplateRef! (NgIf ->TemplateRef)

You missed the * in front of NgIf (like we all have, dozens of times):

<div *ngIf="answer.accepted">&#10004;</div>

Without the *, Angular sees that the ngIf directive is being applied to the div element, but since there is no * or <template> tag, it is unable to locate a template, hence the error.

If you get this error with Angular v5:

Error: StaticInjectorError[TemplateRef]:
StaticInjectorError[TemplateRef]:
NullInjectorError: No provider for TemplateRef!

You may have <template>...</template> in one or more of your component templates. Change/update the tag to <ng-template>...</ng-template>.

How to deserialize a list using GSON or another JSON library in Java?

With Gson, you'd just need to do something like:

List<Video> videos = gson.fromJson(json, new TypeToken<List<Video>>(){}.getType());

You might also need to provide a no-arg constructor on the Video class you're deserializing to.

javax.websocket client simple example

Have a look at this Java EE 7 examples from Arun Gupta.

I forked it on github.

Main

/**
 * @author Arun Gupta
 */
public class Client {

    final static CountDownLatch messageLatch = new CountDownLatch(1);

    public static void main(String[] args) {
        try {
            WebSocketContainer container = ContainerProvider.getWebSocketContainer();
            String uri = "ws://echo.websocket.org:80/";
            System.out.println("Connecting to " + uri);
            container.connectToServer(MyClientEndpoint.class, URI.create(uri));
            messageLatch.await(100, TimeUnit.SECONDS);
        } catch (DeploymentException | InterruptedException | IOException ex) {
            Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

ClientEndpoint

/**
 * @author Arun Gupta
 */
@ClientEndpoint
public class MyClientEndpoint {
    @OnOpen
    public void onOpen(Session session) {
        System.out.println("Connected to endpoint: " + session.getBasicRemote());
        try {
            String name = "Duke";
            System.out.println("Sending message to endpoint: " + name);
            session.getBasicRemote().sendText(name);
        } catch (IOException ex) {
            Logger.getLogger(MyClientEndpoint.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    @OnMessage
    public void processMessage(String message) {
        System.out.println("Received message in client: " + message);
        Client.messageLatch.countDown();
    }

    @OnError
    public void processError(Throwable t) {
        t.printStackTrace();
    }
}

Use 'import module' or 'from module import'?

As Jan Wrobel mentions, one aspect of the different imports is in which way the imports are disclosed.

Module mymath

from math import gcd
...

Use of mymath:

import mymath
mymath.gcd(30, 42)  # will work though maybe not expected

If I imported gcd only for internal use, not to disclose it to users of mymath, this can be inconvenient. I have this pretty often, and in most cases I want to "keep my modules clean".

Apart from the proposal of Jan Wrobel to obscure this a bit more by using import math instead, I have started to hide imports from disclosure by using a leading underscore:

# for instance...
from math import gcd as _gcd
# or...
import math as _math

In larger projects this "best practice" allows my to exactly control what is disclosed to subsequent imports and what isn't. This keeps my modules clean and pays back at a certain size of project.

HTTP Range header

Contrary to Mark Novakowski answer, which for some reason has been upvoted by many, yes, it is a valid and satisfiable request.

In fact the standard, as Wrikken pointed out, makes just such an example. In practice, Apache responds to such requests as expected (with a 206 code), and this is exactly what I use to implement progressive download, that is, only get the tail of a long log file which grows in real time with polling.

Android, How to create option Menu

please see :==

private int group1Id = 1;

int homeId = Menu.FIRST;
int profileId = Menu.FIRST +1;
int searchId = Menu.FIRST +2;
int dealsId = Menu.FIRST +3;
int helpId = Menu.FIRST +4;
int contactusId = Menu.FIRST +5;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    menu.add(group1Id, homeId, homeId, "").setIcon(R.drawable.home_menu);
    menu.add(group1Id, profileId, profileId, "").setIcon(R.drawable.profile_menu);
    menu.add(group1Id, searchId, searchId, "").setIcon(R.drawable.search_menu);
    menu.add(group1Id, dealsId, dealsId, "").setIcon(R.drawable.deals_menu);
    menu.add(group1Id, helpId, helpId, "").setIcon(R.drawable.help_menu);
    menu.add(group1Id, contactusId, contactusId, "").setIcon(R.drawable.contactus_menu);

    return super.onCreateOptionsMenu(menu); 
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case 1:
        // write your code here
        Toast msg = Toast.makeText(MainHomeScreen.this, "Menu 1", Toast.LENGTH_LONG);
        msg.show();
        return true;

    case 2:
        // write your code here
        return true;

    case 3:
        // write your code here
        return true;

    case 4:
        // write your code here
        return true;

    case 5:
        // write your code here
        return true;

    case 6:
        // write your code here
        return true;

    default:
        return super.onOptionsItemSelected(item);
    }
}

Comparing two columns, and returning a specific adjacent cell in Excel

I would advise you to swap B and C columns for the reason that I will explain. Then in D2 type: =VLOOKUP(A2, B2:C4, 2, FALSE)

Finally, copy the formula for the remaining cells.

Explanation: VLOOKUP will first find the value of A2 in the range B2 to C4 (second argument). NOTE: VLOOKUP always searches the first column in this range. This is the reason why you have to swap the two columns before doing anything.

Once the exact match is found, it will return the value in the adjacent cell (third argument).

This means that, if you put 1 as the third argument, the function will return the value in the first column of the range (which will be the same value you were looking for). If you put 2, it will return the value from the second column in the range (the value in the adjacent cell-RIGHT SIDE of the found value).

FALSE indicates that you are finding the exact match. If you put TRUE, you will be searching for the approximate match.

Git merge errors

I had the same issue when switching from a dev branch to master branch. What I did was commit my changes and switch to the master branch. You might have uncommitted changes.

numpy: most efficient frequency counts for unique values in an array

To count unique non-integers - similar to Eelco Hoogendoorn's answer but considerably faster (factor of 5 on my machine), I used weave.inline to combine numpy.unique with a bit of c-code;

import numpy as np
from scipy import weave

def count_unique(datain):
  """
  Similar to numpy.unique function for returning unique members of
  data, but also returns their counts
  """
  data = np.sort(datain)
  uniq = np.unique(data)
  nums = np.zeros(uniq.shape, dtype='int')

  code="""
  int i,count,j;
  j=0;
  count=0;
  for(i=1; i<Ndata[0]; i++){
      count++;
      if(data(i) > data(i-1)){
          nums(j) = count;
          count = 0;
          j++;
      }
  }
  // Handle last value
  nums(j) = count+1;
  """
  weave.inline(code,
      ['data', 'nums'],
      extra_compile_args=['-O2'],
      type_converters=weave.converters.blitz)
  return uniq, nums

Profile info

> %timeit count_unique(data)
> 10000 loops, best of 3: 55.1 µs per loop

Eelco's pure numpy version:

> %timeit unique_count(data)
> 1000 loops, best of 3: 284 µs per loop

Note

There's redundancy here (unique performs a sort also), meaning that the code could probably be further optimized by putting the unique functionality inside the c-code loop.

Spaces cause split in path with PowerShell

For any file path with space, simply put them in double quotations will work in Windows Powershell. For example, if you want to go to Program Files directory, instead of use

PS C:\> cd Program Files

which will induce error, simply use the following will solve the problem:

PS C:\> cd "Program Files"

Visual Studio debugging/loading very slow

My solution was simply to reload a saved GOOD (backup) copy of my settings (made a year ago). Worth trying before resetting everything to blank. My VS2010 would take 60 seconds to start debugging and approx. 3 minutes to stop debugging. I saved the corrupted settings and to my surprise they were over 3MB instead of 260Kb. I loaded the good backup copy and everything is great again :-)

How do I consume the JSON POST data in an Express application

For Express v4+

install body-parser from the npm.

$ npm install body-parser

https://www.npmjs.org/package/body-parser#installation

var express    = require('express')
var bodyParser = require('body-parser')

var app = express()

// parse application/json
app.use(bodyParser.json())

app.use(function (req, res, next) {
  console.log(req.body) // populated!
  next()
})

How to select true/false based on column value?

What does the UDF EntityHasProfile() do?

Typically you could do something like this with a LEFT JOIN:

SELECT EntityId, EntityName, CASE WHEN EntityProfileIs IS NULL THEN 0 ELSE 1 END AS Has Profile
FROM Entities
LEFT JOIN EntityProfiles
    ON EntityProfiles.EntityId = Entities.EntityId

This should eliminate a need for a costly scalar UDF call - in my experience, scalar UDFs should be a last resort for most database design problems in SQL Server - they are simply not good performers.

Install sbt on ubuntu

My guess is that the directory ~/bin/sbt/bin is not in your PATH.

To execute programs or scripts that are in the current directory you need to prefix the command with ./, as in:

./sbt

This is a security feature in linux, so to prevent overriding of system commands (and other programs) by a malicious party dropping a file in your home directory (for example). Imagine a script called 'ls' that emails your /etc/passwd file to 3rd party before executing the ls command... Or one that executes 'rm -rf .'...

That said, unless you need something specific from the latest source code, you're best off doing what paradigmatic said in his post, and install it from the Typesafe repository.

Setting environment variable in react-native?

In my opinion the best option is to use react-native-config. It supports 12 factor.

I found this package extremely useful. You can set multiple environments, e.g. development, staging, production.

In case of Android, variables are available also in Java classes, gradle, AndroidManifest.xml etc. In case of iOS, variables are available also in Obj-C classes, Info.plist.

You just create files like

.env.development
.env.staging
.env.production

You fill these files with key, values like

API_URL=https://myapi.com
GOOGLE_MAPS_API_KEY=abcdefgh

and then just use it:

import Config from 'react-native-config'

Config.API_URL  // 'https://myapi.com'
Config.GOOGLE_MAPS_API_KEY  // 'abcdefgh'

If you want to use different environments, you basically set ENVFILE variable like this:

ENVFILE=.env.staging react-native run-android

or for assembling app for production (android in my case):

cd android && ENVFILE=.env.production ./gradlew assembleRelease

How to only find files in a given directory, and ignore subdirectories using bash

This may do what you want:

find /dev \( ! -name /dev -prune \) -type f -print

Can a constructor in Java be private?

Private Constructors can be defnied in the Java for the following reasons

To have control on the instantiation of the Java objects, it wont allow you to create an instance of an object.
It wont allow the class to be Subclassed
This has a special advantage when implementing the singleton Pattern, Private contstructors are used for it and have a control on the creating the instance for the whole application.
when you want to have a class with all constants defined and Does not require its instance any more, then we declare that class as a private constructor.

NotificationCenter issue on Swift 3

I think it has changed again.

For posting this works in Xcode 8.2.

NotificationCenter.default.post(Notification(name:.UIApplicationWillResignActive)

What is the equivalent of Select Case in Access SQL?

Consider the Switch Function as an alternative to multiple IIf() expressions. It will return the value from the first expression/value pair where the expression evaluates as True, and ignore any remaining pairs. The concept is similar to the SELECT ... CASE approach you referenced but which is not available in Access SQL.

If you want to display a calculated field as commission:

SELECT
    Switch(
        OpeningBalance < 5001, 20,
        OpeningBalance < 10001, 30,
        OpeningBalance < 20001, 40,
        OpeningBalance >= 20001, 50
        ) AS commission
FROM YourTable;

If you want to store that calculated value to a field named commission:

UPDATE YourTable
SET commission =
    Switch(
        OpeningBalance < 5001, 20,
        OpeningBalance < 10001, 30,
        OpeningBalance < 20001, 40,
        OpeningBalance >= 20001, 50
        );

Either way, see whether you find Switch() easier to understand and manage. Multiple IIf()s can become mind-boggling as the number of conditions grows.

Connecting to remote MySQL server using PHP

firewall of the server must be set-up to enable incomming connections on port 3306
you must have a user in MySQL who is allowed to connect from % (any host) (see manual for details)

The current problem is the first one, but right after you resolve it you will likely get the second one.

How do you remove a Cookie in a Java Servlet

This is code that I have effectively used before, passing "/" as the strPath parameter.

public static Cookie eraseCookie(String strCookieName, String strPath) {
    Cookie cookie = new Cookie(strCookieName, "");
    cookie.setMaxAge(0);
    cookie.setPath(strPath);

    return cookie;
}

When to use MongoDB or other document oriented database systems?

Who needs distributed, sharded forums? Maybe Facebook, but unless you're creating a Facebook-competitor, just use Mysql, Postgres or whatever you are most comfortable with. If you want to try MongoDB, ok, but don't expect it to do magic for you. It'll have its quirks and general nastiness, just as everything else, as I'm sure you've already discovered if you really have been working on it already.

Sure, MongoDB may be hyped and seem easy on the surface, but you'll run into problems which more mature products have already overcome. Don't be lured so easily, but rather wait until "nosql" matures, or dies.

Personally, I think "nosql" will wither and die from fragmentation, as there are no set standards (almost by definition). So I will not personally bet on it for any long-term projects.

Only thing that can save "nosql" in my book, is if it can integrate into Ruby or similar languages seamlessly, and make the language "persistent", almost without any overhead in coding and design. That may come to pass, but I'll wait until then, not now, AND it needs to be more mature of course.

Btw, why are you creating a forum from scratch? There are tons of open source forums which can be tweaked to fit most requirements, unless you really are creating The Next Generation of Forums (which I doubt).

How to check if a line has one of the strings in a list?

One approach is to combine the search strings into a regex pattern as in this answer.

Are the decimal places in a CSS width respected?

The width will be rounded to an integer number of pixels.

I don't know if every browser will round it the same way though. They all seem to have a different strategy when rounding sub-pixel percentages. If you're interested in the details of sub-pixel rounding in different browsers, there's an excellent article on ElastiCSS.

edit: I tested @Skilldrick's demo in some browsers for the sake of curiosity. When using fractional pixel values (not percentages, they work as suggested in the article I linked) IE9p7 and FF4b7 seem to round to the nearest pixel, while Opera 11b, Chrome 9.0.587.0 and Safari 5.0.3 truncate the decimal places. Not that I hoped that they had something in common after all...

iPhone App Icons - Exact Radius?

All the previous answers to this question are now out of date. Since at least May 2015, Apple requires you to provide square icons with no rounding:

Keep icon corners square. The system applies a mask that rounds icon corners automatically.

https://developer.apple.com/ios/human-interface-guidelines/graphics/app-icon/

jquery UI dialog: how to initialize without a title bar?

Try using

$("#mydialog").closest(".ui-dialog-titlebar").hide();

This will hide all dialogs titles

$(".ui-dialog-titlebar").hide();

What is the backslash character (\\)?

\ is used for escape sequences in programming languages.

\n prints a newline
\\ prints a backslash
\" prints "
\t prints a tabulator
\b moves the cursor one back

Change the icon of the exe file generated from Visual Studio 2010

I found it easier to edit the project file directly e.g. YourApp.csproj.

You can do this by modifying ApplicationIcon property element:

<ApplicationIcon>..\Path\To\Application.ico</ApplicationIcon>

Also, if you create an MSI installer for your application e.g. using WiX, you can use the same icon again for display in Add/Remove Programs. See tip 5 here.

Access Google's Traffic Data through a Web Service

Rather than trying to pull the raw traffic data, you can try a different approach. The Google Directions API allows you to query the api with a particular route and returns a JSON string or XML element as a result. This result includes the element - ' duration_in_traffic ' This indicates the total duration of the particular leg of the journey, taking into account current traffic conditions. (for information on 'leg' and other elements of the JSON string returned by the Directions API refer link below)

https://developers.google.com/maps/documentation/directions/#JSON I haven't tried this myself but just something I came across in the documentation.

Disable Pinch Zoom on Mobile Web

To everyone who said that this is a bad idea I want to say it is not always a bad one. Sometimes it is very boring to have to zoom out to see all the content. For example when you type on an input on iOS it zooms to get it in the center of the screen. You have to zoom out after that cause closing the keyboard does not do the work. Also I agree that when you put many I hours in making a great layout and user experience you don't want it to be messed up by a zoom.

But the other argument is valuable as well for people with vision issues. However In my opinion if you have issues with your eyes you are already using the zooming features of the system so there is no need to disturb the content.

How do I configure the proxy settings so that Eclipse can download new plugins?

finally work for me !

In Eclipse, Window > Preferences > General > Network Connections,
set Active Provider to Native
add to eclipse.ini :

-Djava.net.useSystemProxies=true
-Dhttp.proxyPort=8080
-Dhttp.proxyHost=myproxy
-Dhttp.proxyUser=mydomain\myusername
-Dhttp.proxyPassword=mypassword
-Dhttp.nonProxyHosts=localhost|127.0.0.1|192.168.*|10.*
-Dorg.eclipse.ecf.provider.filetransfer.excludeContributors=org.eclipse.ecf.provider.filetransfer.httpclient4

Environment Variable with Maven

I suggest using the amazing tool direnv. With it you can inject environment variables once you cd into the project. These steps worked for me:

.envrc file

source_up
dotenv

.env file

_JAVA_OPTIONS="-DYourEnvHere=123"

How to implement custom JsonConverter in JSON.NET to deserialize a List of base class objects?

A lot of the times the implementation will exist in the same namespace as the interface. So, I came up with this:

    public class InterfaceConverter : JsonConverter
    {
    public override bool CanWrite => false;
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var token = JToken.ReadFrom(reader);
        var typeVariable = this.GetTypeVariable(token);
        if (TypeExtensions.TryParse(typeVariable, out var implimentation))
        { }
        else if (!typeof(IEnumerable).IsAssignableFrom(objectType))
        {
            implimentation = this.GetImplimentedType(objectType);
        }
        else
        {
            var genericArgumentTypes = objectType.GetGenericArguments();
            var innerType = genericArgumentTypes.FirstOrDefault();
            if (innerType == null)
            {
                implimentation = typeof(IEnumerable);
            }
            else
            {
                Type genericType = null;
                if (token.HasAny())
                {
                    var firstItem = token[0];
                    var genericTypeVariable = this.GetTypeVariable(firstItem);
                    TypeExtensions.TryParse(genericTypeVariable, out genericType);
                }

                genericType = genericType ?? this.GetImplimentedType(innerType);
                implimentation = typeof(IEnumerable<>);
                implimentation = implimentation.MakeGenericType(genericType);
            }
        }

        return JsonConvert.DeserializeObject(token.ToString(), implimentation);
    }

    public override bool CanConvert(Type objectType)
    {
        return !typeof(IEnumerable).IsAssignableFrom(objectType) && objectType.IsInterface || typeof(IEnumerable).IsAssignableFrom(objectType) && objectType.GetGenericArguments().Any(t => t.IsInterface);
    }

    protected Type GetImplimentedType(Type interfaceType)
    {
        if (!interfaceType.IsInterface)
        {
            return interfaceType;
        }

        var implimentationQualifiedName = interfaceType.AssemblyQualifiedName?.Replace(interfaceType.Name, interfaceType.Name.Substring(1));
        return implimentationQualifiedName == null ? interfaceType : Type.GetType(implimentationQualifiedName) ?? interfaceType;
    }

    protected string GetTypeVariable(JToken token)
    {
        if (!token.HasAny())
        {
            return null;
        }

        return token.Type != JTokenType.Object ? null : token.Value<string>("$type");
    }
}

Therefore, you can include this globally like so:

public static JsonSerializerSettings StandardSerializerSettings => new JsonSerializerSettings
    {
        Converters = new List<JsonConverter>
        {
            new InterfaceConverter()
        }
    };

Easy way to use variables of enum types as string in C?

The technique from Making something both a C identifier and a string? can be used here.

As usual with such preprocessor stuff, writing and understanding the preprocessor part can be hard, and includes passing macros to other macros and involves using # and ## operators, but using it is real easy. I find this style very useful for long enums, where maintaining the same list twice can be really troublesome.

Factory code - typed only once, usually hidden in the header:

enumFactory.h:

// expansion macro for enum value definition
#define ENUM_VALUE(name,assign) name assign,

// expansion macro for enum to string conversion
#define ENUM_CASE(name,assign) case name: return #name;

// expansion macro for string to enum conversion
#define ENUM_STRCMP(name,assign) if (!strcmp(str,#name)) return name;

/// declare the access function and define enum values
#define DECLARE_ENUM(EnumType,ENUM_DEF) \
  enum EnumType { \
    ENUM_DEF(ENUM_VALUE) \
  }; \
  const char *GetString(EnumType dummy); \
  EnumType Get##EnumType##Value(const char *string); \

/// define the access function names
#define DEFINE_ENUM(EnumType,ENUM_DEF) \
  const char *GetString(EnumType value) \
  { \
    switch(value) \
    { \
      ENUM_DEF(ENUM_CASE) \
      default: return ""; /* handle input error */ \
    } \
  } \
  EnumType Get##EnumType##Value(const char *str) \
  { \
    ENUM_DEF(ENUM_STRCMP) \
    return (EnumType)0; /* handle input error */ \
  } \

Factory used

someEnum.h:

#include "enumFactory.h"
#define SOME_ENUM(XX) \
    XX(FirstValue,) \
    XX(SecondValue,) \
    XX(SomeOtherValue,=50) \
    XX(OneMoreValue,=100) \

DECLARE_ENUM(SomeEnum,SOME_ENUM)

someEnum.cpp:

#include "someEnum.h"
DEFINE_ENUM(SomeEnum,SOME_ENUM)

The technique can be easily extended so that XX macros accepts more arguments, and you can also have prepared more macros to substitute for XX for different needs, similar to the three I have provided in this sample.

Comparison to X-Macros using #include / #define / #undef

While this is similar to X-Macros others have mentioned, I think this solution is more elegant in that it does not require #undefing anything, which allows you to hide more of the complicated stuff is in the factory the header file - the header file is something you are not touching at all when you need to define a new enum, therefore new enum definition is a lot shorter and cleaner.

You don't have permission to access / on this server

try to edit httpd.conf

<Directory "/usr/local/www/apache24/cgi-bin">
  Options Indexes FollowSymLinks Includes ExecCGI
  Require all granted
</Directory>

Add 2 hours to current time in MySQL?

You need DATE_SUB() OR DATE_ADD()

Can't check signature: public key not found

There is a similar problem.it is a tomcat digital signature.

$ gpg --verify apache-tomcat-9.0.16-windows-x64.zip.asc apache-tomcat-9.0.16-windows- 
x64.zip
gpg: Signature made 2019?02? 5?  0:32:50
gpg:                using RSA key A9C5DF4D22E99998D9875A5110C01C5A2F6059E7
gpg: Can't check signature: No public key

but then I use the RSA key it provided to receive the public key to verify.

$ gpg --receive-keys A9C5DF4D22E99998D9875A5110C01C5A2F6059E7
gpg: key 10C01C5A2F6059E7: 38 signatures not checked due to missing keys
gpg: key 10C01C5A2F6059E7: public key "Mark E D Thomas <[email protected]>" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1

Then successfully.

$ gpg --verify apache-tomcat-9.0.16-windows-x64.zip.asc
gpg: assuming signed data in 'apache-tomcat-9.0.16-windows-x64.zip'
gpg: Signature made 2019?02? 5?  0:32:50
gpg:                using RSA key A9C5DF4D22E99998D9875A5110C01C5A2F6059E7
gpg: Good signature from "Mark E D Thomas <[email protected]>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: A9C5 DF4D 22E9 9998 D987  5A51 10C0 1C5A 2F60 59E7

Block direct access to a file over http but allow php script access

in httpd.conf to block browser & wget access to include files especially say db.inc or config.inc . Note you cannot chain file types in the directive instead create multiple file directives.

<Files ~ "\.inc$">
Order allow,deny
Deny from all
</Files>

to test your config before restarting apache

service httpd configtest

then (graceful restart)

service httpd graceful

How to set up a Web API controller for multipart/form-data

This is what solved my problem
Add the following line to WebApiConfig.cs

config.Formatters.XmlFormatter.SupportedMediaTypes.Add(new System.Net.Http.Headers.MediaTypeHeaderValue("multipart/form-data"));

How to Increase browser zoom level on page load?

Setting environment variables in Linux using Bash

export VAR=value will set VAR to value. Enclose it in single quotes if you want spaces, like export VAR='my val'. If you want the variable to be interpolated, use double quotes, like export VAR="$MY_OTHER_VAR".

Using SUMIFS with multiple AND OR conditions

In order to get the formula to work place the cursor inside the formula and press ctr+shift+enter and then it will work!

Load a UIView from nib in Swift

Swift 3 version of Logan's answer

extension UIView {
    public class func fromNib(nibName: String? = nil) -> Self {
        return fromNib(nibName: nibName, type: self)
    }

    public class func fromNib<T: UIView>(nibName: String? = nil, type: T.Type) -> T {
        return fromNib(nibName: nibName, type: T.self)!
    }

    public class func fromNib<T: UIView>(nibName: String? = nil, type: T.Type) -> T? {
        var view: T?
        let name: String

        if let nibName = nibName {
            name = nibName
        } else {
            name = self.nibName
        }

        if let nibViews = Bundle.main.loadNibNamed(name, owner: nil, options: nil) {
            for nibView in nibViews {
                if let tog = nibView as? T {
                    view = tog
                }
            }
        }

        return view
    }

    public class var nibName: String {
        return "\(self)".components(separatedBy: ".").first ?? ""
    }

    public class var nib: UINib? {
        if let _ = Bundle.main.path(forResource: nibName, ofType: "nib") {
            return UINib(nibName: nibName, bundle: nil)
        } else {
            return nil
        }
    }
}

How can I echo the whole content of a .html file in PHP?

If you want to make sure the HTML file doesn't contain any PHP code and will not be executed as PHP, do not use include or require. Simply do:

echo file_get_contents("/path/to/file.html");

JQuery datepicker language

A quick Update, for the text "Today", the right names are:

todayText: 'Huidige', todayStatus: 'Bekijk de huidige maand',

"starting Tomcat server 7 at localhost has encountered a prob"

Close Eclipse
Copy all files from TOMCAT/conf to WORKSPACE/Servers/Tomcat v7.0 Server at localhost-config
Start Eclipse
Expand the Servers project, click on the Tomcat 7 project and hit F5
Start Tomcat from Eclipse

Setting up MySQL and importing dump within Dockerfile

edit: I had misunderstand the question here. My following answer explains how to run sql commands at container creation time, but not at image creation time as desired by OP.

I'm not quite fond of Kuhess's accepted answer as the sleep 5 seems a bit hackish to me as it assumes that the mysql db daemon has correctly loaded within this time frame. That's an assumption, no guarantee. Also if you use a provided mysql docker image, the image itself already takes care about starting up the server; I would not interfer with this with a custom /usr/bin/mysqld_safe.

I followed the other answers around here and copied bash and sql scripts into the folder /docker-entrypoint-initdb.d/ within the docker container as this is clearly the intended way by the mysql image provider. Everything in this folder is executed once the db daemon is ready, hence you should be able rely on it.

As an addition to the others - since no other answer explicitely mentions this: besides sql scripts you can also copy bash scripts into that folder which might give you more control.

This is what I had needed for example as I also needed to import a dump, but the dump alone was not sufficient as it did not provide which database it should import into. So in my case I have a script named db_custom_init.sh with this content:

mysql -u root -p$MYSQL_ROOT_PASSWORD -e 'create database my_database_to_import_into'
mysql -u root -p$MYSQL_ROOT_PASSWORD my_database_to_import_into < /home/db_dump.sql

and this Dockerfile copying that script:

FROM mysql/mysql-server:5.5.62
ENV MYSQL_ROOT_PASSWORD=XXXXX
COPY ./db_dump.sql /home/db_dump.sql
COPY ./db_custom_init.sh /docker-entrypoint-initdb.d/

Finding the next available id in MySQL

Update 2014-12-05: I am not recommending this approach due to reasons laid out in Simon's (accepted) answer as well as Diego's comment. Please use query below at your own risk.

The shortest one i found on mysql developer site:

SELECT Auto_increment FROM information_schema.tables WHERE table_name='the_table_you_want'

mind you if you have few databases with same tables, you should specify database name as well, like so:

SELECT Auto_increment FROM information_schema.tables WHERE table_name='the_table_you_want' AND table_schema='the_database_you_want';

Linux c++ error: undefined reference to 'dlopen'

you can try to add this

LIBS=-ldl CFLAGS=-fno-strict-aliasing

to the configure options

Transpose list of lists

Here is a solution for transposing a list of lists that is not necessarily square:

maxCol = len(l[0])
for row in l:
    rowLength = len(row)
    if rowLength > maxCol:
        maxCol = rowLength
lTrans = []
for colIndex in range(maxCol):
    lTrans.append([])
    for row in l:
        if colIndex < len(row):
            lTrans[colIndex].append(row[colIndex])

XPath contains(text(),'some string') doesn't work when used with node with more than one Text subnode

//*[text()='ABC']

returns

<street>ABC</street>
<comment>BLAH BLAH BLAH <br><br>ABC</comment>

How to get the first element of the List or Set?

You can use the get(index) method to access an element from a List.

Sets, by definition, simply contain elements and have no particular order. Therefore, there is no "first" element you can get, but it is possible to iterate through it using iterator (using the for each loop) or convert it to an array using the toArray() method.

Concat strings by & and + in VB.Net

& and + are both concatenation operators but when you specify an integer while using +, vb.net tries to cast "Hello" into integer to do an addition. If you change "Hello" with "123", you will get the result 124.

Remove an entire column from a data.frame in R

You can set it to NULL.

> Data$genome <- NULL
> head(Data)
   chr region
1 chr1    CDS
2 chr1   exon
3 chr1    CDS
4 chr1   exon
5 chr1    CDS
6 chr1   exon

As pointed out in the comments, here are some other possibilities:

Data[2] <- NULL    # Wojciech Sobala
Data[[2]] <- NULL  # same as above
Data <- Data[,-2]  # Ian Fellows
Data <- Data[-2]   # same as above

You can remove multiple columns via:

Data[1:2] <- list(NULL)  # Marek
Data[1:2] <- NULL        # does not work!

Be careful with matrix-subsetting though, as you can end up with a vector:

Data <- Data[,-(2:3)]             # vector
Data <- Data[,-(2:3),drop=FALSE]  # still a data.frame

Uncaught TypeError: Cannot set property 'value' of null

The problem may where the code is being executed. If you are in the head of a document executing JavaScript, even when you have an element with id="u" in your web page, the code gets executed before the DOM is finished loading, and so none of the HTML really exists yet... You can fix this by moving your code to the end of the page just above the closing html tag. This is one good reason to use jQuery.

How I can check if an object is null in ruby on rails 2?

In your example, you can simply replace null with `nil and it will work fine.

require 'erb'

template = <<EOS
<% if (@objectname != nil) then %>
  @objectname is not nil
<% else %>
  @objectname is nil
<% end %>
EOS

@objectname = nil
ERB.new(template, nil, '>').result # => "  @objectname is nil\n"

@objectname = 'some name'
ERB.new(template, nil, '>').result # => "  @objectname is not nil\n"

Contrary to what the other poster said, you can see above that then works fine in Ruby. It's not common, but it is fine.

#blank? and #present? have other implications. Specifically, if the object responds to #empty?, they will check whether it is empty. If you go to http://api.rubyonrails.org/ and search for "blank?", you will see what objects it is defined on and how it works. Looking at the definition on Object, we see "An object is blank if it’s false, empty, or a whitespace string. For example, “”, “ ”, nil, [], and {} are all blank." You should make sure that this is what you want.

Also, nil is considered false, and anything other than false and nil is considered true. This means you can directly place the object in the if statement, so a more canonical way of writing the above would be

require 'erb'

template = <<EOS
<% if @objectname %>
  @objectname is not nil
<% else %>
  @objectname is nil
<% end %>
EOS

@objectname = nil
ERB.new(template, nil, '>').result # => "  @objectname is nil\n"

@objectname = 'some name'
ERB.new(template, nil, '>').result # => "  @objectname is not nil\n"

If you explicitly need to check nil and not false, you can use the #nil? method, for which nil is the only object that will cause this to return true.

nil.nil?          # => true
false.nil?        # => false
Object.new.nil?   # => false

PHP 7 simpleXML

For Ubuntu 14.04 with

PHP 7.0.13-1+deb.sury.org~trusty+1 (cli) ( NTS )

sudo apt-get install php-xml

worked for me.

pretty-print JSON using JavaScript

It works well:

console.table()

How to Store Historical Data

I don't think there is a particular standard way of doing it but I thought I would throw in a possible method. I work in Oracle and our in-house web application framework that utilizes XML for storing application data.

We use something called a Master - Detail model that at it's simplest consists of:

Master Table for example calledWidgets often just containing an ID. Will often contain data that won't change over time / isn't historical.

Detail / History Table for example called Widget_Details containing at least:

ID - primary key. Detail/historical ID
MASTER_ID - for example in this case called 'WIDGET_ID', this is the FK to the Master record
START_DATETIME - timestamp indicating the start of that database row
END_DATETIME - timestamp indicating the end of that database row
STATUS_CONTROL - single char column indicated status of the row. 'C' indicates current, NULL or 'A' would be historical/archived. We only use this because we can't index on END_DATETIME being NULL
CREATED_BY_WUA_ID - stores the ID of the account that caused the row to be created
XMLDATA - stores the actual data

So essentially, a entity starts by having 1 row in the master and 1 row in the detail. The detail having a NULL end date and STATUS_CONTROL of 'C'. When an update occurs, the current row is updated to have END_DATETIME of the current time and status_control is set to NULL (or 'A' if preferred). A new row is created in the detail table, still linked to the same master, with status_control 'C', the id of the person making the update and the new data stored in the XMLDATA column.

This is the basis of our historical model. The Create / Update logic is handled in an Oracle PL/SQL package so you simply pass the function the current ID, your user ID and the new XML data and internally it does all the updating / inserting of rows to represent that in the historical model. The start and end times indicate when that row in the table is active for.

Storage is cheap, we don't generally DELETE data and prefer to keep an audit trail. This allows us to see what our data looked like at any given time. By indexing status_control = 'C' or using a View, cluttering isn't exactly a problem. Obviously your queries need to take into account you should always use the current (NULL end_datetime and status_control = 'C') version of a record.

Remove characters from NSString?

If you want to support more than one space at a time, or support any whitespace, you can do this:

NSString* noSpaces =
    [[myString componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]
                           componentsJoinedByString:@""];

How to delete duplicate rows in SQL Server?

Please see the below way of deletion too.

Declare @table table
(col1 varchar(10),col2 int,col3 int, col4 int, col5 int, col6 int, col7 int)
Insert into @table values 
('john',1,1,1,1,1,1),
('john',1,1,1,1,1,1),
('sally',2,2,2,2,2,2),
('sally',2,2,2,2,2,2)

Created a sample table named @table and loaded it with given data.

Delete  aliasName from (
Select  *,
        ROW_NUMBER() over (Partition by col1,col2,col3,col4,col5,col6,col7 order by col1) as rowNumber
From    @table) aliasName 
Where   rowNumber > 1

Select * from @table

Note: If you are giving all columns in the Partition by part, then order by do not have much significance.

I know, the question is asked three years ago, and my answer is another version of what Tim has posted, But posting just incase it is helpful for anyone.

Where can I find documentation on formatting a date in JavaScript?

Where is the documentation which lists the format specifiers supported by the Date() object?

I stumbled across this today and was quite surprised that no one took the time to answer this simple question. True, there are many libraries out there to help with date manipulation. Some are better than others. But that wasn't the question asked.

AFAIK, pure JavaScript doesn't support format specifiers the way you have indicated you'd like to use them. But it does support methods for formatting dates and/or times, such as .toLocaleDateString(), .toLocaleTimeString(), and .toUTCString().

The Date object reference I use most frequently is on the w3schools.com website (but a quick Google search will reveal many more that may better meet your needs).

Also note that the Date Object Properties section provides a link to prototype, which illustrates some ways you can extend the Date object with custom methods. There has been some debate in the JavaScript community over the years about whether or not this is best practice, and I am not advocating for or against it, just pointing out its existence.

Python: CSV write by column rather than row

what about Result_* there also are generated in the loop (because i don't think it's possible to add to the csv file)

i will go like this ; generate all the data at one rotate the matrix write in the file:

A = []

A.append(range(1, 5))  # an Example of you first loop

A.append(range(5, 9))  # an Example of you second loop

data_to_write = zip(*A)

# then you can write now row by row

Number of occurrences of a character in a string

Here is the most inefficient way to get the count in all answers. But you'll get a Dictionary that contains key-value pairs as a bonus.

string test = "key1=value1&key2=value2&key3=value3";

var keyValues = Regex.Matches(test, @"([\w\d]+)=([\w\d]+)[&$]*")
                     .Cast<Match>()
                     .ToDictionary(m => m.Groups[1].Value, m => m.Groups[2].Value);

var count = keyValues.Count - 1;

Difference between require, include, require_once and include_once?

Difference between _once functions and without _once functions: without _once code will be included again whereas with _once functions PHP keeps track of the included files and will include it only once.

Difference between require and include: If a required file is not found PHP will emit a fatal error whereas for include only a warning will be emitted.

Protecting cells in Excel but allow these to be modified by VBA script

A basic but simple to understand answer:

Sub Example()
    ActiveSheet.Unprotect
    Program logic...
    ActiveSheet.Protect
End Sub

Split Java String by New Line

The above code doesnt actually do anything visible - it just calcualtes then dumps the calculation. Is it the code you used, or just an example for this question?

try doing textAreaDoc.insertString(int, String, AttributeSet) at the end?

Correct way to integrate jQuery plugins in AngularJS

i have alreay 2 situations where directives and services/factories didnt play well.

the scenario is that i have (had) a directive that has dependency injection of a service, and from the directive i ask the service to make an ajax call (with $http).

in the end, in both cases the ng-Repeat did not file at all, even when i gave the array an initial value.

i even tried to make a directive with a controller and an isolated-scope

only when i moved everything to a controller and it worked like magic.

example about this here Initialising jQuery plugin (RoyalSlider) in Angular JS

Android Button Onclick

There are two solutions for this are :-

(1) do not put onClick in xml

(2) remove

button.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
            // TODO Auto-generated method stub
    }
});

and put

public void setLogin(View v) {
    // Your code here
}

Check if a time is between two times (time DataType)

This should also work (even in SQL-Server 2005):

SELECT *
FROM dbo.MyTable
WHERE Created >= DATEADD(hh,23,DATEADD(day, DATEDIFF(day, 0, Created - 1), 0))
  AND Created <  DATEADD(hh,7,DATEADD(day, DATEDIFF(day, 0, Created), 0))

DEMO

How to create radio buttons and checkbox in swift (iOS)?

I made a super simple class to handle this in a Mac application I'm working on. Hopefully, this is helpful to someone

RadioButtonController Class:

class RadioButtonController: NSObject {

var buttonArray : [NSButton] = []
var currentleySelectedButton : NSButton?
var defaultButton : NSButton = NSButton() {
    didSet {
        buttonArrayUpdated(buttonSelected: self.defaultButton)
    }
}

func buttonArrayUpdated(buttonSelected : NSButton) {
    for button in buttonArray {
        if button == buttonSelected {
            currentleySelectedButton = button
            button.state = .on
        } else {
            button.state = .off
        }
    }
}

}

Implementation in View Controller:

class OnboardingDefaultLaunchConfiguration: NSViewController {

let radioButtonController : RadioButtonController = RadioButtonController()
@IBOutlet weak var firstRadioButton: NSButton!
@IBOutlet weak var secondRadioButton: NSButton!

@IBAction func folderRadioButtonSelected(_ sender: Any) {
    radioButtonController.buttonArrayUpdated(buttonSelected: folderGroupRadioButton)
}

@IBAction func fileListRadioButtonSelected(_ sender: Any) {
    radioButtonController.buttonArrayUpdated(buttonSelected: fileListRadioButton)
}

override func viewDidLoad() {
    super.viewDidLoad()
    radioButtonController.buttonArray = [firstRadioButton, secondRadioButton]
    radioButtonController.defaultButton = firstRadioButton
}

}

How to cherry-pick from a remote branch?

If you have fetched, yet this still happens, the following might be a reason.

It can happen that the commit you are trying to pick, is no longer belonging to any branch. This may happen when you rebase.

In such case, at the remote repo:

git checkout xxxxx
git checkout -b temp-branch

Then in your repo, fetch again. The new branch will be fetched, including that commit.

How to find tag with particular text with Beautiful Soup?

With bs4 4.7.1+ you can use :contains pseudo class to specify the td containing your search string

from bs4 import BeautifulSoup
html = '''
<tr>
  <td class="pos">\n
      "Some text:"\n
      <br>\n
      <strong>some value</strong>\n
  </td>
</tr>
<tr>
  <td class="pos">\n
      "Fixed text:"\n
      <br>\n
      <strong>text I am looking for</strong>\n
  </td>
</tr>
<tr>
  <td class="pos">\n
      "Some other text:"\n
      <br>\n
      <strong>some other value</strong>\n
  </td>
</tr>'''
soup = bs(html, 'lxml')
print(soup.select_one('td:contains("Fixed text:")'))

How to create a inner border for a box in html?

Use dashed border style for outline.
Draw background-color with :before or :after pseudo element.

Note: This method will allow you to have maximum browser support.

Output Image:

_x000D_

* {box-sizing: border-box;}_x000D_
_x000D_
.box {_x000D_
  border: 1px dashed #fff;_x000D_
  position: relative;_x000D_
  height: 160px;_x000D_
  width: 350px;_x000D_
  margin: 20px;_x000D_
}_x000D_
_x000D_
.box:before {_x000D_
  position: absolute;_x000D_
  background: black;_x000D_
  content: '';_x000D_
  bottom: -10px;_x000D_
  right: -10px;_x000D_
  left: -10px;_x000D_
  top: -10px;_x000D_
  z-index: -1;_x000D_
}

_x000D_

<div class="box">_x000D_
_x000D_
</div>

_x000D_

Why does ANT tell me that JAVA_HOME is wrong when it is not?

To solve this problem add tools.jar file in window->preferences->ant-> runtime .

Invalid default value for 'create_date' timestamp field

TIMESTAMP has a range of '1970-01-01 00:00:01' UTC to '2038-01-19 03:14:07' UTC (see doc). The default value must be within that range.

Other odd, related, behavior:

CREATE TABLE tbl1 (
    ts TIMESTAMP);  
Query OK, 0 rows affected (0.01 sec)

CREATE TABLE tbl2 (
    ts TIMESTAMP,
    ts2 TIMESTAMP);
ERROR 1067 (42000): Invalid default value for 'ts2'

CREATE TABLE tbl3 (
    ts TIMESTAMP,
    ts2 TIMESTAMP DEFAULT '1970-01-01 00:00:01');
Query OK, 0 rows affected (0.01 sec)

Side note, if you want to insert NULLS:

CREATE TABLE tbl4 (
    ts TIMESTAMP NULL DEFAULT NULL);

Convert string to date in bash

This worked for me :

date -d '20121212 7 days'
date -d '12-DEC-2012 7 days'
date -d '2012-12-12 7 days'
date -d '2012-12-12 4:10:10PM 7 days'
date -d '2012-12-12 16:10:55 7 days'

then you can format output adding parameter '+%Y%m%d'

invalid byte sequence for encoding "UTF8"

Open file CSV by Notepad++ . Choose menu Encoding \ Encoding in UTF-8, then fix few cell manuallly.

Then try import again.

Tomcat view catalina.out log file

It works for me on Ubuntu...
cd var/lib/tomcat7
sudo nano logs/catalina.out

Correct way to use Modernizr to detect IE?

Well, after doing more research on this topic I ended up using following solution for targeting IE 10+. As IE10&11 are the only browsers which support the -ms-high-contrast media query, that is a good option without any JS:

@media screen and (-ms-high-contrast: active), screen and (-ms-high-contrast: none) {  
   /* IE10+ specific styles go here */  
}

Works perfectly.

Place cursor at the end of text in EditText

The question is old and answered, but I think it may be useful to have this answer if you want to use the newly released DataBinding tools for Android, just set this in your XML :

<data>
    <variable name="stringValue" type="String"/>
</data>
...
<EditText
        ...
        android:text="@={stringValue}"
        android:selection="@{stringValue.length()}"
        ...
/>

Two inline-block, width 50% elements wrap to second line

I continued to have this problem in ie7 when the browser was at certain widths. Turns out older browsers round the pixel value up if the percentage result isn't a whole number. To solve this you can try setting

overflow: hidden;

on the last element (or all of them).

Best way to track onchange as-you-type in input type="text"?

I had a similar requirement (twitter style text field). Used onkeyup and onchange. onchange actually takes care of mouse paste operations during lost focus from the field.

[Update] In HTML5 or later, use oninput to get real time character modification updates, as explained in other answers above.

Replace \n with actual new line in Sublime Text

Open Find and Replace Option ( CTRL + ALT + F in Mac )
Type \n in find input box
Click on Find All button, This will select all the \n in the text with the cursor
Now press Enter, this will replace \n with the New Line

Add a new element to an array without specifying the index in Bash

With an indexed array, you can to something like this:

declare -a a=()
a+=('foo' 'bar')

Is there a command line utility for rendering GitHub flavored Markdown?

I found a website that will do this for you: http://tmpvar.com/markdown.html. Paste in your Markdown, and it'll display it for you. It seems to work just fine!

However, it doesn't seem to handle the syntax highlighting option for code; that is, the ~~~ruby feature doesn't work. It just prints 'ruby'.

How to call a method in MainActivity from another class?

Use this code in sub Fragment of MainActivity to call the method on it.

((MainActivity) getActivity()).startChronometer();

How do I simulate a low bandwidth, high latency environment?

I found this little neat program for Windows called clumsy. It's in kind of alpha status, but it seem to work fine for me, and it's open source.

Edit: Others have noticed that you can't limit bandwidth with clumsy, and that's true. You can only add Latency and a couple of other network related errors. This will disqualify this answer as a valid answer to the question, however since I had good use for it when I wanted to simulate a bad network so I'll leave it here as long as it has > 0 votes or similar.

Pure CSS checkbox image replacement

If you are still looking for further more customization,

Check out the following library: https://lokesh-coder.github.io/pretty-checkbox/

Thanks

Change package name for Android in React Native

I use the react-native-rename* npm package. Install it via

npm install react-native-rename -g

Then, from the root of your React Native project, execute the following:

react-native-rename "MyApp" -b com.mycompany.myapp

How to get full width in body element

You can use CSS to do it for example

<style>
html{
    width:100%;
    height:100%;
}
body{
    width:100%;
    height:100%;
    background-color:#DDD;
}
</style>

Rename file with Git

Do a git status to find out if your file is actually in your index or the commit.

It is easy as a beginner to misunderstand the index/staging area.

I view it as a 'progress pinboard'. I therefore have to add the file to the pinboard before I can commit it (i.e. a copy of the complete pinboard), I have to update the pinboard when required, and I also have to deliberately remove files from it when I've finished with them - simply creating, editing or deleting a file doesn't affect the pinboard. It's like 'storyboarding'.

Edit: As others noted, You should do the edits locally and then push the updated repo, rather than attempt to edit directly on github.

How do you get git to always pull from a specific branch?

Not wanting to edit my git config file I followed the info in @mipadi's post and used:

$ git pull origin master

Convert R vector to string vector of 1 element

Use the collapse argument to paste:

paste(a,collapse=" ")
[1] "aa bb cc"

What is the default boolean value in C#?

Basically local variables aren't automatically initialized. Hence using them without initializing would result in an exception.

Only the following variables are automatically initialized to their default values:

Static variables
Instance variables of class and struct instances
Array elements

The default values are as follows (assigned in default constructor of a class):

The default value of a variable of reference type is null.
For integer types, the default value is 0
For char, the default value is `\u0000'
For float, the default value is 0.0f
For double, the default value is 0.0d
For decimal, the default value is 0.0m
For bool, the default value is false
For an enum type, the default value is 0
For a struct type, the default value is obtained by setting all value type fields to their default values

As far as later parts of your question are conerned:

The reason why all variables which are not automatically initialized to default values should be initialized is a restriction imposed by compiler.
private bool foo = false; This is indeed redundant since this is an instance variable of a class. Hence this would be initialized to false in the default constructor. Hence no need to set this to false yourself.

How to solve Object reference not set to an instance of an object.?

You need to initialize the list first:

protected List<string> list = new List<string>();

Password must have at least one non-alpha character

A simple method will be like this:

Match match1 = Regex.Match(<input_string>, @"(?=.{7})");

match1.Success ensures that there are at least 8 characters.

Match match2 = Regex.Match(<input_string>, [^a-zA-Z]);

match2.Success ensures that there is at least one special character or number within the string.

So, match1.Success && match2.Success guarantees will get what you want.

Leverage browser caching, how on apache or .htaccess?

First we need to check if we have enabled mod_headers.c and mod_expires.c.

sudo apache2 -l

If we don't have it, we need to enable them

sudo a2enmod headers

Then we need to restart apache

sudo apache2 restart

At last, add the rules on .htaccess (seen on other answers), for example

ExpiresActive On
ExpiresByType image/gif A2592000
ExpiresByType image/jpeg A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/png A2592000
ExpiresByType image/x-icon A2592000
ExpiresByType text/css A86400
ExpiresByType text/javascript A86400
ExpiresByType application/x-shockwave-flash A2592000
#
<FilesMatch "\.(gif|jpe?g|png|ico|css|js|swf)$">
Header set Cache-Control "public"
</FilesMatch>

Change a branch name in a Git repo

If you're currently on the branch you want to rename:

git branch -m new_name

Or else:

git branch -m old_name new_name

You can check with:

git branch -a

As you can see, only the local name changed Now, to change the name also in the remote you must do:

git push origin :old_name

This removes the branch, then upload it with the new name:

git push origin new_name

Source: https://web.archive.org/web/20150929104013/http://blog.changecong.com:80/2012/10/rename-a-remote-branch-on-github

Print all properties of a Python Class

Another way is to call the dir() function (see https://docs.python.org/2/library/functions.html#dir).

a = Animal()
dir(a)   
>>>
['__class__', '__delattr__', '__dict__', '__doc__', '__format__', '__getattribute__',
 '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', 
 '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 
 '__weakref__', 'age', 'color', 'kids', 'legs', 'name', 'smell']

Note, that dir() tries to reach any attribute that is possible to reach.

Then you can access the attributes e.g. by filtering with double underscores:

attributes = [attr for attr in dir(a) 
              if not attr.startswith('__')]

This is just an example of what is possible to do with dir(), please check the other answers for proper way of doing this.

Are static class variables possible in Python?

You could also enforce a class to be static using metaclass.

class StaticClassError(Exception):
    pass


class StaticClass:
    __metaclass__ = abc.ABCMeta

    def __new__(cls, *args, **kw):
        raise StaticClassError("%s is a static class and cannot be initiated."
                                % cls)

class MyClass(StaticClass):
    a = 1
    b = 3

    @staticmethod
    def add(x, y):
        return x+y

Then whenever by accident you try to initialize MyClass you'll get an StaticClassError.

Having the output of a console application in Visual Studio instead of the console

regarding System.Diagnostics.Debug producing a lot of "junk" in the Output window: You can turn that off by right clicking in the output window. E.g. there's an item "Module Load Messages" which you want to disable and an item "Program Output" which you want to keep.

Build tree array from flat array in javascript

Based on @FurkanO's answer, I created another version that does not mutate the origial data (like @Dac0d3r requested). I really liked @shekhardtu's answer, but realized it had to filter through the data many times. I thought a solution could be to use FurkanO's answer by copying the data first. I tried my version in jsperf, and the results where unfortunately (very) bleak... It seems like the accepted answer is really a good one! My version is quite configurable and failsafe though, so I share it with you guys anyway; here is my contribution:

function unflat(data, options = {}) {
    const { id, parentId, childrenKey } = {
        id: "id",
        parentId: "parentId",
        childrenKey: "children",
        ...options
    };
    const copiesById = data.reduce(
        (copies, datum) => ((copies[datum[id]] = datum) && copies),
        {}
    );
    return Object.values(copiesById).reduce(
        (root, datum) => {
            if ( datum[parentId] && copiesById[datum[parentId]] ) {
                copiesById[datum[parentId]][childrenKey] = [ ...copiesById[datum[parentId]][childrenKey], datum ];
            } else {
                root = [ ...root, datum ];
            }
            return root
        }, []
    );
}

const data = [
    {
        "account": "10",
        "name": "Konto 10",
        "parentAccount": null
    },{
        "account": "1010",
        "name": "Konto 1010",
        "parentAccount": "10"
    },{
        "account": "10101",
        "name": "Konto 10101",
        "parentAccount": "1010"
    },{
        "account": "10102",
        "name": "Konto 10102",
        "parentAccount": "1010"
    },{
        "account": "10103",
        "name": "Konto 10103",
        "parentAccount": "1010"
    },{
        "account": "20",
        "name": "Konto 20",
        "parentAccount": null
    },{
        "account": "2020",
        "name": "Konto 2020",
        "parentAccount": "20"
    },{
        "account": "20201",
        "name": "Konto 20201",
        "parentAccount": "2020"
    },{
        "account": "20202",
        "name": "Konto 20202",
        "parentAccount": "2020"
    }
];

const options = {
    id: "account",
    parentId: "parentAccount",
    childrenKey: "children"
};

console.log(
    "Hierarchical tree",
    unflat(data, options)
);

With the options parameter, it is possible to configure what property to use as id or parent id. It is also possible to configure the name of the children property, if someone wants "childNodes": [] or something.

OP could simply use default options:

input.People = unflat(input.People);

If the parent id is falsy (null, undefined or other falsy values) or the parent object does not exist, we consider the object to be a root node.

How to check if a process is running via a batch script

Another possibility I came up with, inspired by using grep, is:

tasklist /FI "IMAGENAME eq myapp.exe" 2>NUL | find /I /N "myapp.exe">NUL
if "%ERRORLEVEL%"=="0" echo Program is running

It doesn't need to save an extra file, so I prefer this method.

T-SQL split string based on delimiter

For those looking for answers for SQL Server 2016+. Use the built-in STRING_SPLIT function

Eg:

DECLARE @tags NVARCHAR(400) = 'clothing,road,,touring,bike'  

SELECT value  
FROM STRING_SPLIT(@tags, ',')  
WHERE RTRIM(value) <> '';

Reference: https://msdn.microsoft.com/en-nz/library/mt684588.aspx

Check if a parameter is null or empty in a stored procedure

What about combining coalesce and nullif?

SET @PreviousStartDate = coalesce(nullif(@PreviousStartDate, ''), '01/01/2010')

Verify object attribute value with mockito

The solutions above didn't really work in my case. I couldn't use ArgumentCaptor as the method was called several times and I needed to validate each one. A simple Matcher with "argThat" did the trick easily.

Custom Matcher

// custom matcher
private class PolygonMatcher extends ArgumentMatcher<PolygonOptions> {
    private int fillColor;
    public PolygonMatcher(int fillColor) {
        this.fillColor = fillColor;
    }

    @Override
    public boolean matches(Object argument) {
        if (!(argument instanceof PolygonOptions)) return false;
        PolygonOptions arg = (PolygonOptions)argument;
        return Color.red(arg.getFillColor()) == Color.red(fillColor)
                && Color.green(arg.getFillColor()) == Color.green(fillColor)
                && Color.blue(arg.getFillColor()) == Color.blue(fillColor);
    }
}

Test Runner

// do setup work setup
// 3 light green polygons
int green = getContext().getResources().getColor(R.color.dmb_rx_bucket1);
verify(map, times(3)).addPolygon(argThat(new PolygonMatcher(green)));

// 1 medium yellow polygons
int yellow = getContext().getResources().getColor(R.color.dmb_rx_bucket4);
    verify(map, times(1)).addPolygon(argThat(new PolygonMatcher(yellow)));

// 3 red polygons
int orange = getContext().getResources().getColor(R.color.dmb_rx_bucket5);
verify(map, times(3)).addPolygon(argThat(new PolygonMatcher(orange)));

// 2 red polygons
int red = getContext().getResources().getColor(R.color.dmb_rx_bucket7);
verify(map, times(2)).addPolygon(argThat(new PolygonMatcher(red)));

How to check if a specified key exists in a given S3 bucket using Java

Update:

It seems there's a new API to check just that. See another answer in this page: https://stackoverflow.com/a/36653034/435605

Original post:

Use errorCode.equals("NoSuchKey")

try {
    AmazonS3 s3 = new AmazonS3Client(new ClasspathPropertiesFileCredentialsProvider());
    String bucketName = getBucketName();
    s3.createBucket(bucketName);
    S3Object object = s3.getObject(bucketName, getKey());
} catch (AmazonServiceException e) {
    String errorCode = e.getErrorCode();
    if (!errorCode.equals("NoSuchKey")) {
        throw e;
    }
    Logger.getLogger(getClass()).debug("No such key!!!", e);
}

Note about the exception: I know exceptions should not be used for flow control. The problem is that Amazon didn't provide any api to check this flow - just documentation about the exception.

Mean filter for smoothing images in Matlab

I see good answers have already been given, but I thought it might be nice to just give a way to perform mean filtering in MATLAB using no special functions or toolboxes. This is also very good for understanding exactly how the process works as you are required to explicitly set the convolution kernel. The mean filter kernel is fortunately very easy:

I = imread(...)
kernel = ones(3, 3) / 9; % 3x3 mean kernel
J = conv2(I, kernel, 'same'); % Convolve keeping size of I

Note that for colour images you would have to apply this to each of the channels in the image.

Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?

The raw_json_encode() function above did not solve me the problem (for some reason, the callback function raised an error on my PHP 5.2.5 server).

But this other solution did actually work.

https://www.experts-exchange.com/questions/28628085/json-encode-fails-with-special-characters.html

Credits should go to Marco Gasi. I just call his function instead of calling json_encode():

function jsonRemoveUnicodeSequences( $json_struct )
{ 
    return preg_replace( "/\\\\u([a-f0-9]{4})/e", "iconv('UCS-4LE','UTF-8',pack('V', hexdec('U$1')))", json_encode( $json_struct ) );
}

Basic HTTP authentication with Node and Express 4

TL;DR:

? `express.basicAuth` is gone
? `basic-auth-connect` is deprecated
? `basic-auth` doesn't have any logic
? `http-auth` is an overkill
? `express-basic-auth` is what you want

More info:

Since you're using Express then you can use the express-basic-auth middleware.

See the docs:

https://www.npmjs.com/package/express-basic-auth

Example:

const app = require('express')();
const basicAuth = require('express-basic-auth');
 
app.use(basicAuth({
    users: { admin: 'supersecret123' },
    challenge: true // <--- needed to actually show the login dialog!
}));

Convert UTF-8 encoded NSData to NSString

If the data is not null-terminated, you should use -initWithData:encoding:

NSString* newStr = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding];

If the data is null-terminated, you should instead use -stringWithUTF8String: to avoid the extra \0 at the end.

NSString* newStr = [NSString stringWithUTF8String:[theData bytes]];

(Note that if the input is not properly UTF-8-encoded, you will get nil.)

Swift variant:

let newStr = String(data: data, encoding: .utf8)
// note that `newStr` is a `String?`, not a `String`.

If the data is null-terminated, you could go though the safe way which is remove the that null character, or the unsafe way similar to the Objective-C version above.

// safe way, provided data is \0-terminated
let newStr1 = String(data: data.subdata(in: 0 ..< data.count - 1), encoding: .utf8)
// unsafe way, provided data is \0-terminated
let newStr2 = data.withUnsafeBytes(String.init(utf8String:))

How do I deal with special characters like \^$.?*|+()[{ in my regex?

Escape with a double backslash

R treats backslashes as escape values for character constants. (... and so do regular expressions. Hence the need for two backslashes when supplying a character argument for a pattern. The first one isn't actually a character, but rather it makes the second one into a character.) You can see how they are processed using cat.

y <- "double quote: \", tab: \t, newline: \n, unicode point: \u20AC"
print(y)
## [1] "double quote: \", tab: \t, newline: \n, unicode point: €"
cat(y)
## double quote: ", tab:    , newline: 
## , unicode point: €

Further reading: Escaping a backslash with a backslash in R produces 2 backslashes in a string, not 1

To use special characters in a regular expression the simplest method is usually to escape them with a backslash, but as noted above, the backslash itself needs to be escaped.

grepl("\\[", "a[b")
## [1] TRUE

To match backslashes, you need to double escape, resulting in four backslashes.

grepl("\\\\", c("a\\b", "a\nb"))
## [1]  TRUE FALSE

The rebus package contains constants for each of the special characters to save you mistyping slashes.

library(rebus)
OPEN_BRACKET
## [1] "\\["
BACKSLASH
## [1] "\\\\"

For more examples see:

?SpecialCharacters

Your problem can be solved this way:

library(rebus)
grepl(OPEN_BRACKET, "a[b")

Form a character class

You can also wrap the special characters in square brackets to form a character class.

grepl("[?]", "a?b")
## [1] TRUE

Two of the special characters have special meaning inside character classes: \ and ^.

Backslash still needs to be escaped even if it is inside a character class.

grepl("[\\\\]", c("a\\b", "a\nb"))
## [1]  TRUE FALSE

Caret only needs to be escaped if it is directly after the opening square bracket.

grepl("[ ^]", "a^b")  # matches spaces as well.
## [1] TRUE
grepl("[\\^]", "a^b") 
## [1] TRUE

rebus also lets you form a character class.

char_class("?")
## <regex> [?]

Use a pre-existing character class

If you want to match all punctuation, you can use the [:punct:] character class.

grepl("[[:punct:]]", c("//", "[", "(", "{", "?", "^", "$"))
## [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE

stringi maps this to the Unicode General Category for punctuation, so its behaviour is slightly different.

stri_detect_regex(c("//", "[", "(", "{", "?", "^", "$"), "[[:punct:]]")
## [1]  TRUE  TRUE  TRUE  TRUE  TRUE FALSE FALSE

You can also use the cross-platform syntax for accessing a UGC.

stri_detect_regex(c("//", "[", "(", "{", "?", "^", "$"), "\\p{P}")
## [1]  TRUE  TRUE  TRUE  TRUE  TRUE FALSE FALSE

Use \Q \E escapes

Placing characters between \\Q and \\E makes the regular expression engine treat them literally rather than as regular expressions.

grepl("\\Q.\\E", "a.b")
## [1] TRUE

rebus lets you write literal blocks of regular expressions.

literal(".")
## <regex> \Q.\E

Don't use regular expressions

Regular expressions are not always the answer. If you want to match a fixed string then you can do, for example:

grepl("[", "a[b", fixed = TRUE)
stringr::str_detect("a[b", fixed("["))
stringi::stri_detect_fixed("a[b", "[")

How to fix Git error: object file is empty?

The git object files have gone corrupt (as pointed out in other answers as well). This can happen during machine crashes, etc.

I had the same thing. After reading the other top answers here I found the quickest way to fix the broken git repository with the following commands (execute in the git working directory that contains the .git folder):

(Be sure to back up your git repository folder first!)

find .git/objects/ -type f -empty | xargs rm
git fetch -p
git fsck --full

This will first remove any empty object files that cause corruption of the repository as a whole, and then fetch down the missing objects (as well as latest changes) from the remote repository, and then do a full object store check. Which, at this point, should succeed without any errors (there may be still some warnings though!)

PS. This answer suggests you have a remote copy of your git repository somewhere (e.g. on GitHub) and the broken repository is the local repository that is tied to the remote repository which is still in tact. If that is not the case, then do not attempt to fix it the way I recommend.

What is the proper use of an EventEmitter?

Yes, go ahead and use it.

EventEmitter is a public, documented type in the final Angular Core API. Whether or not it is based on Observable is irrelevant; if its documented emit and subscribe methods suit what you need, then go ahead and use it.

As also stated in the docs:

Uses Rx.Observable but provides an adapter to make it work as specified here: https://github.com/jhusain/observable-spec

Once a reference implementation of the spec is available, switch to it.

So they wanted an Observable like object that behaved in a certain way, they implemented it, and made it public. If it were merely an internal Angular abstraction that shouldn't be used, they wouldn't have made it public.

There are plenty of times when it's useful to have an emitter which sends events of a specific type. If that's your use case, go for it. If/when a reference implementation of the spec they link to is available, it should be a drop-in replacement, just as with any other polyfill.

Just be sure that the generator you pass to the subscribe() function follows the linked spec. The returned object is guaranteed to have an unsubscribe method which should be called to free any references to the generator (this is currently an RxJs Subscription object but that is indeed an implementation detail which should not be depended on).

export class MyServiceEvent {
    message: string;
    eventId: number;
}

export class MyService {
    public onChange: EventEmitter<MyServiceEvent> = new EventEmitter<MyServiceEvent>();

    public doSomething(message: string) {
        // do something, then...
        this.onChange.emit({message: message, eventId: 42});
    }
}

export class MyConsumer {
    private _serviceSubscription;

    constructor(private service: MyService) {
        this._serviceSubscription = this.service.onChange.subscribe({
            next: (event: MyServiceEvent) => {
                console.log(`Received message #${event.eventId}: ${event.message}`);
            }
        })
    }

    public consume() {
        // do some stuff, then later...

        this.cleanup();
    }

    private cleanup() {
        this._serviceSubscription.unsubscribe();
    }
}

All of the strongly-worded doom and gloom predictions seem to stem from a single Stack Overflow comment from a single developer on a pre-release version of Angular 2.

WARNING: UNPROTECTED PRIVATE KEY FILE! when trying to SSH into Amazon EC2 Instance

The private key file should be protected. In my case i have been using the public_key authentication for a long time and i used to set the permission as 600 (rw- --- ---) for private key and 644 (rw- r-- r--) and for the .ssh folder in the home folder you will have 700 permission (rwx --- ---). For setting this go to the user's home folder and run the following command

Set the 700 permission for .ssh folder

chmod 700 .ssh

Set the 600 permission for private key file

chmod 600 .ssh/id_rsa

Set 644 permission for public key file

chmod 644 .ssh/id_rsa.pub

Why does Java have transient fields?

transient is used to indicate that a class field doesn't need to be serialized. Probably the best example is a Thread field. There's usually no reason to serialize a Thread, as its state is very 'flow specific'.

Changing git commit message after push (given that no one pulled from remote)

If you want to modify an older commit, not the last one, you will need to use rebase command as explained in here,Github help page , on the Amending the message of older or multiple commit messages section

Oracle TNS names not showing when adding new connection to SQL Developer

In SQLDeveloper browse Tools --> Preferences, as shown in below image.

enter image description here

In the Preferences options expand Database --> select Advanced --> under "Tnsnames Directory" --> Browse the directory where tnsnames.ora present.
Then click on Ok.
as shown in below diagram.

enter image description here

You have Done!

Now you can connect via the TNSnames options.

How to create helper file full of functions in react native?

i prefer to create folder his name is Utils and inside create page index that contain what that think you helper by

const findByAttr = (component,attr) => {
    const wrapper=component.find(`[data-test='${attr}']`);
    return wrapper;
}

const FUNCTION_NAME = (component,attr) => {
    const wrapper=component.find(`[data-test='${attr}']`);
    return wrapper;
}

export {findByAttr, FUNCTION_NAME}

When you need to use this it should be imported as use "{}" because you did not use the default keyword look

 import {FUNCTION_NAME,findByAttr} from'.whare file is store/utils/index'

Receive result from DialogFragment

Well its too late may be to answer but here is what i did to get results back from the DialogFragment. very similar to @brandon's answer. Here i am calling DialogFragment from a fragment, just place this code where you are calling your dialog.

FragmentManager fragmentManager = getFragmentManager();
            categoryDialog.setTargetFragment(this,1);
            categoryDialog.show(fragmentManager, "dialog");

where categoryDialog is my DialogFragment which i want to call and after this in your implementation of dialogfragment place this code where you are setting your data in intent. The value of resultCode is 1 you can set it or use system Defined.

            Intent intent = new Intent();
            intent.putExtra("listdata", stringData);
            getTargetFragment().onActivityResult(getTargetRequestCode(), resultCode, intent);
            getDialog().dismiss();

now its time to get back to to the calling fragment and implement this method. check for data validity or result success if you want with resultCode and requestCode in if condition.

 @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);        
        //do what ever you want here, and get the result from intent like below
        String myData = data.getStringExtra("listdata");
Toast.makeText(getActivity(),data.getStringExtra("listdata"),Toast.LENGTH_SHORT).show();
    }

Drop view if exists

DROP VIEW if exists {ViewName}
Go
CREATE View {ViewName} AS 
SELECT * from {TableName}  
Go

Reverse Contents in Array

try this can you better fell comparing to another codes.

using namespace std;
int main() {
    int a[5]={4,6,3,5,9};
    for(int i=4;i>=0;i--) {
        cout<<"\n"<<a[i];
    }
}

PHP Error: Cannot use object of type stdClass as array (array and object issues)

$blog is an object, not an array, so you should access it like so:

$blog->id;
$blog->title;
$blog->content;

Getting a list of associative array keys

I am currently using Rob de la Cruz's reply:

Object.keys(obj)

And in a file loaded early on I have some lines of code borrowed from elsewhere on the Internet which cover the case of old versions of script interpreters that do not have Object.keys built in.

if (!Object.keys) {
    Object.keys = function(object) {
        var keys = [];
        for (var o in object) {
            if (object.hasOwnProperty(o)) {
                keys.push(o);
            }
        }
        return keys;
    };
}

I think this is the best of both worlds for large projects: simple modern code and backwards compatible support for old versions of browsers, etc.

Effectively it puts JW's solution into the function when Rob de la Cruz's Object.keys(obj) is not natively available.

How to map and remove nil values in Ruby

each_with_object is probably the cleanest way to go here:

new_items = items.each_with_object([]) do |x, memo|
    ret = process_x(x)
    memo << ret unless ret.nil?
end

In my opinion, each_with_object is better than inject/reduce in conditional cases because you don't have to worry about the return value of the block.

AWS S3 CLI - Could not connect to the endpoint URL

Some AWS services are just available in specific regions that do not match your actual region. If this is the case you can override the standard setting by adding the region to your actual cli command.

This might be a handy solution for people that do not want to change their default region in the config file. IF your general config file is not set: Please check the suggestions above.

In this example the region is forced to eu-west-1 (e.g. Ireland):

aws s3 ls --region=eu-west-1

Tested and used with aws workmail to delete users:

aws workmail delete-user --region=eu-west-1 --organization-id [org-id] --user-id [user-id]

I derived the idea from this thread and it works perfect for me - so I wanted to share it. Hope it helps!

Use of the MANIFEST.MF file in Java

Manifest.MF contains information about the files contained in the JAR file.

Whenever a JAR file is created a default manifest.mf file is created inside META-INF folder and it contains the default entries like this:

Manifest-Version: 1.0
Created-By: 1.7.0_06 (Oracle Corporation)

These are entries as “header:value” pairs. The first one specifies the manifest version and second one specifies the JDK version with which the JAR file is created.

Main-Class header: When a JAR file is used to bundle an application in a package, we need to specify the class serving an entry point of the application. We provide this information using ‘Main-Class’ header of the manifest file,

Main-Class: {fully qualified classname}

The ‘Main-Class’ value here is the class having main method. After specifying this entry we can execute the JAR file to run the application.

Class-Path header: Most of the times we need to access the other JAR files from the classes packaged inside application’s JAR file. This can be done by providing their fully qualified paths in the manifest file using ‘Class-Path’ header,

Class-Path: {jar1-name jar2-name directory-name/jar3-name}

This header can be used to specify the external JAR files on the same local network and not inside the current JAR.

Package version related headers: When the JAR file is used for package versioning the following headers are used as specified by the Java language specification:

Headers in a manifest
Header                  | Definition
-------------------------------------------------------------------
Name                    | The name of the specification.
Specification-Title     | The title of the specification.
Specification-Version   | The version of the specification.
Specification-Vendor    | The vendor of the specification.
Implementation-Title    | The title of the implementation.
Implementation-Version  | The build number of the implementation.
Implementation-Vendor   | The vendor of the implementation.

Package sealing related headers:

We can also specify if any particular packages inside a JAR file should be sealed meaning all the classes defined in that package must be archived in the same JAR file. This can be specified with the help of ‘Sealed’ header,

Name: {package/some-package/} Sealed:true

Here, the package name must end with ‘/’.

Enhancing security with manifest files:

We can use manifest files entries to ensure the security of the web application or applet it packages with the different attributes as ‘Permissions’, ‘Codebae’, ‘Application-Name’, ‘Trusted-Only’ and many more.

META-INF folder:

This folder is where the manifest file resides. Also, it can contain more files containing meta data about the application. For example, in an EJB module JAR file, this folder contains the EJB deployment descriptor for the EJB module along with the manifest file for the JAR. Also, it contains the xml file containing mapping of an abstract EJB references to concrete container resources of the application server on which it will be run.

Reference:
https://docs.oracle.com/javase/tutorial/deployment/jar/manifestindex.html

How can we run a test method with multiple parameters in MSTest?

Not exactly the same as NUnit's Value (or TestCase) attributes, but MSTest has the DataSource attribute, which allows you to do a similar thing.

You can hook it up to database or XML file - it is not as straightforward as NUnit's feature, but it does the job.

docker build with --build-arg with multiple arguments

Use --build-arg with each argument.

If you are passing two argument then add --build-arg with each argument like:

docker build \
-t essearch/ess-elasticsearch:1.7.6 \
--build-arg number_of_shards=5 \
--build-arg number_of_replicas=2 \
--no-cache .

Position buttons next to each other in the center of page

jsFiddle:http://jsfiddle.net/7Laf8/1302/

I hope this answers your question.

_x000D_

.wrapper {_x000D_
  text-align: center;_x000D_
  display: inline-block;_x000D_
  position: absolute;_x000D_
  top: 50%;_x000D_
  left: 50%;_x000D_
}

_x000D_

<div class="wrapper">_x000D_
  <button class="button">Hello</button>_x000D_
  <button class="button">Another One</button>_x000D_
</div>

_x000D_

How can I determine if an image has loaded, using Javascript/jQuery?

You want to do what Allain said, however be aware that sometimes the image loads before dom ready, which means your load handler won't fire. The best way is to do as Allain says, but set the src of the image with javascript after attaching the load hander. This way you can guarantee that it fires.

In terms of accessibility, will your site still work for people without javascript? You may want to give the img tag the correct src, attach you dom ready handler to run your js: clear the image src (give it a fixed with and height with css to prevent the page flickering), then set your img load handler, then reset the src to the correct file. This way you cover all bases :)

Ubuntu apt-get unable to fetch packages

I tried using :

sudo do-release-upgrade

and then use :

sudo apt-get update

after that you will be able to install any packages.

If this did not worked for you try to change the network conf in apt.conf

Getting execute permission to xp_cmdshell

I want to complete the answer from tchester.

(1) Enable the xp_cmdshell procedure:

-- To allow advanced options to be changed.
EXEC sp_configure 'show advanced options', 1
RECONFIGURE
GO

-- Enable the xp_cmdshell procedure
EXEC sp_configure 'xp_cmdshell', 1
RECONFIGURE
GO

(2) Create a login 'Domain\TestUser' (windows user) for the non-sysadmin user that has public access to the master database

(3) Grant EXEC permission on the xp_cmdshell stored procedure:

GRANT EXECUTE ON xp_cmdshell TO [Domain\TestUser]

(4) Create a proxy account that xp_cmdshell will be run under using sp_xp_cmdshell_proxy_account

EXEC sp_xp_cmdshell_proxy_account 'Domain\TestUser', 'pwd'
-- Note: pwd means windows password for [Domain\TestUser] account id on the box.
--       Don't include square brackets around Domain\TestUser.

(5) Grant control server permission to user

USE master;
GRANT CONTROL SERVER TO [Domain\TestUser]
GO

jQuery ajax success callback function definition

The "new" way of doing this since jQuery 1.5 (Jan 2011) is to use deferred objects instead of passing a success callback. You should return the result of $.ajax and then use the .done, .fail etc methods to add the callbacks outside of the $.ajax call.

function getData() {
    return $.ajax({
        url : 'example.com',
        type: 'GET'
    });
}

function handleData(data /* , textStatus, jqXHR */ ) {
    alert(data);
    //do some stuff
}

getData().done(handleData);

This decouples the callback handling from the AJAX handling, allows you to add multiple callbacks, failure callbacks, etc, all without ever needing to modify the original getData() function. Separating the AJAX functionality from the set of actions to be completed afterwards is a good thing!.

Deferreds also allow for much easier synchronisation of multiple asynchronous events, which you can't easily do just with success:

For example, I could add multiple callbacks, an error handler, and wait for a timer to elapse before continuing:

// a trivial timer, just for demo purposes -
// it resolves itself after 5 seconds
var timer = $.Deferred();
setTimeout(timer.resolve, 5000);

// add a done handler _and_ an `error:` handler, even though `getData`
// didn't directly expose that functionality
var ajax = getData().done(handleData).fail(error);

$.when(timer, ajax).done(function() {
    // this won't be called until *both* the AJAX and the 5s timer have finished
});

ajax.done(function(data) {
    // you can add additional callbacks too, even if the AJAX call
    // already finished
});

Other parts of jQuery use deferred objects too - you can synchronise jQuery animations with other async operations very easily with them.

Unable to execute dex: Multiple dex files define

I removed Android dependencies from build path and it worked.

Get Date in YYYYMMDD format in windows batch file

If, after reading the other questions and viewing the links mentioned in the comment sections, you still can't figure it out, read on.

First of all, where you're going wrong is the offset.

It should look more like this...

set mydate=%date:~10,4%%date:~6,2%/%date:~4,2%
echo %mydate%

If the date was Tue 12/02/2013 then it would display it as 2013/02/12.

To remove the slashes, the code would look more like

set mydate=%date:~10,4%%date:~7,2%%date:~4,2%
echo %mydate%

which would output 20130212

And a hint for doing it in the future, if mydate equals something like %date:~10,4%%date:~7,2% or the like, you probably forgot a tilde (~).

Java program to find the largest & smallest number in n numbers without using arrays

Try the code mentioned below

public static void main(String[] args) {
    int smallest=0; int large=0; int num;
    System.out.println("enter the number");
    Scanner input=new Scanner(System.in);
    int n=input.nextInt();
    num=input.nextInt();
    smallest = num;
    for(int i=0;i<n-1;i++)
        {
            num=input.nextInt();
            if(num<smallest)
            {
                smallest=num;
            }
        }
        System.out.println("the smallest is:"+smallest);
}

How do I put hint in a asp:textbox

asp:TextBox ID="txtName" placeholder="any text here"

Select entries between dates in doctrine 2

Look how I format my date $jour in the parameters. It depends if you use a expr()->like or a expr()->lte

$qb
        ->select('e')
        ->from('LdbPlanningBundle:EventEntity', 'e')
        ->where(
            $qb->expr()->andX(
                $qb->expr()->orX(
                    $qb->expr()->like('e.start', ':jour1'),
                    $qb->expr()->like('e.end', ':jour1'),
                    $qb->expr()->andX(
                        $qb->expr()->lte('e.start', ':jour2'),
                        $qb->expr()->gte('e.end', ':jour2')
                    )
                ),
                $qb->expr()->eq('e.user', ':user')
            )
        )
        ->andWhere('e.user = :user ')
        ->setParameter('user', $user)
        ->setParameter('jour1', '%'.$jour->format('Y-m-d').'%')
        ->setParameter('jour2', $jour->format('Y-m-d'))
        ->getQuery()
        ->getArrayResult()
    ;

How to define two angular apps / modules in one page?

I created an alternative directive that doesn't have ngApp's limitations. It's called ngModule. This is what you code would look like when you use it:

<!DOCTYPE html>
<html>
    <head>
        <script src="angular.js"></script>
        <script src="angular.ng-modules.js"></script>
        <script>
          var moduleA = angular.module("MyModuleA", []);
          moduleA.controller("MyControllerA", function($scope) {
              $scope.name = "Bob A";
          });

          var moduleB = angular.module("MyModuleB", []);
          moduleB.controller("MyControllerB", function($scope) {
              $scope.name = "Steve B";
          });
        </script>
    </head>
    <body>
        <div ng-modules="MyModuleA, MyModuleB">
            <h1>Module A, B</h1>
            <div ng-controller="MyControllerA">
                {{name}}
            </div>
            <div ng-controller="MyControllerB">
                {{name}}
            </div>
        </div>

        <div ng-module="MyModuleB">
            <h1>Just Module B</h1>
            <div ng-controller="MyControllerB">
                {{name}}
            </div>
        </div>
    </body>
</html>

You can get the source code at:

http://www.simplygoodcode.com/2014/04/angularjs-getting-around-ngapp-limitations-with-ngmodule/

It's essentially the same code used internally by AngularJS without the limitations.

date format yyyy-MM-ddTHH:mm:ssZ

In C# 6+ you can use string interpolation and make this more terse:

$"{DateTime.UtcNow:s}Z"

html 5 audio tag width

You also can set the width of a audio tag by JavaScript:

audio = document.getElementById('audio-id');
audio.style.width = '200px';

Styling HTML email for Gmail

As others have said, some email programs will not read the css styles. If you already have a web email written up you can use the following tool from zurb to inline all of your styles:

http://zurb.com/ink/inliner.php

This comes in extremely handy when using templates like those mentioned above from mailchimp, campaign monitor, etc. as they, as you have found, will not work in some email programs. This tool leaves your style section for the mail programs that will read it and puts all the styles inline to get more universal readability in the format that you wanted.

How to hide element using Twitter Bootstrap and show it using jQuery?

Use bootstrap .collapse instead of .hidden

Later in JQuery you can use .show() or .hide() to manipulate it

MatPlotLib: Multiple datasets on the same scatter plot

I don't know, it works fine for me. Exact commands:

import scipy, pylab
ax = pylab.subplot(111)
ax.scatter(scipy.randn(100), scipy.randn(100), c='b')
ax.scatter(scipy.randn(100), scipy.randn(100), c='r')
ax.figure.show()

How to include file in a bash shell script

Simply put inside your script :

source FILE

. FILE # POSIX compliant

$ LANG=C help source
source: source filename [arguments]
Execute commands from a file in the current shell.

Read and execute commands from FILENAME in the current shell.  The
entries in $PATH are used to find the directory containing FILENAME.
If any ARGUMENTS are supplied, they become the positional parameters
when FILENAME is executed.

Exit Status:
Returns the status of the last command executed in FILENAME; fails if
FILENAME cannot be read.

how to get request path with express req object

If you want to really get only "path" without querystring, you can use url library to parse and get only path part of url.

var url = require('url');

//auth required or redirect
app.use('/account', function(req, res, next) {
    var path = url.parse(req.url).pathname;
    if ( !req.session.user ) {
      res.redirect('/login?ref='+path);
    } else {
      next();
    }
});

Programs & Examples On #Codec

FlutterError: Unable to load asset

TypeError: Object of type 'bytes' is not JSON serializable

Load local images in React.js

error UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte

Vertical Align Center in Bootstrap 4

How do I get rid of the b-prefix in a string in python?

(unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

Django - Did you forget to register or load this tag?

HTML 5 Video "autoplay" not automatically starting in CHROME

Download and save PDF file with Python requests module

Call to undefined function App\Http\Controllers\ [ function name ]

FFMPEG mp4 from http live streaming m3u8 file?

Significance of ios_base::sync_with_stdio(false); cin.tie(NULL);

UnicodeEncodeError: 'ascii' codec can't encode character at special name

Writing an mp4 video using python opencv

Encoding Error in Panda read_csv

Deserialize JSON with Jackson into Polymorphic Types - A Complete Example is giving me a compile error

How to open html file?

UnicodeEncodeError: 'charmap' codec can't encode characters

Gradle DSL method not found: 'runProguard'

What steps are needed to stream RTSP from FFmpeg?

Python NLTK: SyntaxError: Non-ASCII character '\xc3' in file (Sentiment Analysis -NLP)

UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 23: ordinal not in range(128)

How to encode text to base64 in python

gcc: undefined reference to

PhoneGap Eclipse Issue - eglCodecCommon glUtilsParamSize: unknow param errors

UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte

Best approach to real time http streaming to HTML5 video client

How to deploy correctly when using Composer's develop / production switch?

How to playback MKV video in web browser?

How to fix: "UnicodeDecodeError: 'ascii' codec can't decode byte"

HTML5 Video not working in IE 11

Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat

ImportError: No module named dateutil.parser

Android Gradle plugin 0.7.0: "duplicate files during packaging of APK"

Javascript: console.log to html

UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 7: ordinal not in range(128)

Playing m3u8 Files with HTML Video Tag

"for line in..." results in UnicodeDecodeError: 'utf-8' codec can't decode byte

How to write UTF-8 in a CSV file

Reverse a string without using reversed() or [::-1]?

UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)

Cutting the videos based on start and end time using ffmpeg

new answer (fast)

old answer with explanation (slow)

Python unicode equal comparison failed

UnicodeDecodeError when reading CSV file in Pandas with Python

Why do I get a SyntaxError for a Unicode escape in my file path?

u'\ufeff' in Python string

The type List is not generic; it cannot be parameterized with arguments [HTTPClient]

Technically what is the main difference between Oracle JDK and OpenJDK?

Writing a pandas DataFrame to CSV file

Include .so library in apk in android studio

UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2

python 3.2 UnicodeEncodeError: 'charmap' codec can't encode character '\u2013' in position 9629: character maps to <undefined>

fatal error LNK1169: one or more multiply defined symbols found in game programming

Maven Java EE Configuration Marker with Java Server Faces 1.2

python encoding utf-8

Convert Python dictionary to JSON array

UnicodeEncodeError: 'charmap' codec can't encode - character maps to <undefined>, print function

How to recompile with -fPIC

How to increase IDE memory limit in IntelliJ IDEA on Mac?

Matplotlib-Animation "No MovieWriters Available"

Encoding as Base64 in Java

Execute jar file with multiple classpath libraries from command prompt

Visual Studio debugging/loading very slow

UnicodeDecodeError: 'utf8' codec can't decode byte 0x9c

Printing to the console in Google Apps Script?

Answering the OP questions

Addendum

JavaScript: function returning an object

The module was expected to contain an assembly manifest

How to make Sonar ignore some classes for codeCoverage metric?

ffmpeg - Converting MOV files to MP4

How to add a new audio (not mixing) into a video using ffmpeg?

Decoding a Base64 string in Java

how to create insert new nodes in JsonNode?

Setting Camera Parameters in OpenCV/Python

string encoding and decoding?