Programs & Examples On #Yahoo messenger

Yahoo! Messenger (sometimes abbreviated YIM or YM) is an advertisement-supported instant messaging client and associated protocol provided by Yahoo!.

Automatic creation date for Django model form objects?

Well, the above answer is correct, auto_now_add and auto_now would do it, but it would be better to make an abstract class and use it in any model where you require created_at and updated_at fields.

class TimeStampMixin(models.Model):
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        abstract = True

Now anywhere you want to use it you can do a simple inherit and you can use timestamp in any model you make like.

class Posts(TimeStampMixin):
    name = models.CharField(max_length=50)
    ...
    ...

In this way, you can leverage object-oriented reusability, in Django DRY(don't repeat yourself)

Java get String CompareTo as a comparator object

You may write your own comparator

public class ExampleComparator  implements Comparator<String> {
  public int compare(String obj1, String obj2) {
    if (obj1 == obj2) {
        return 0;
    }
    if (obj1 == null) {
        return -1;
    }
    if (obj2 == null) {
        return 1;
    }
    return obj1.compareTo(obj2);
  }
}

How to receive JSON as an MVC 5 action method parameter

You are sending a array of string

var usersRoles = [];
jQuery("#dualSelectRoles2 option").each(function () {
    usersRoles.push(jQuery(this).val());
});   

So change model type accordingly

 public ActionResult AddUser(List<string> model)
 {
 }

How to create enum like type in TypeScript?

As of TypeScript 0.9 (currently an alpha release) you can use the enum definition like this:

enum TShirtSize {
  Small,
  Medium,
  Large
}

var mySize = TShirtSize.Large;

By default, these enumerations will be assigned 0, 1 and 2 respectively. If you want to explicitly set these numbers, you can do so as part of the enum declaration.

Listing 6.2 Enumerations with explicit members

enum TShirtSize {
  Small = 3,
  Medium = 5,
  Large = 8
}

var mySize = TShirtSize.Large;

Both of these examples lifted directly out of TypeScript for JavaScript Programmers.

Note that this is different to the 0.8 specification. The 0.8 specification looked like this - but it was marked as experimental and likely to change, so you'll have to update any old code:

Disclaimer - this 0.8 example would be broken in newer versions of the TypeScript compiler.

enum TShirtSize {
  Small: 3,
  Medium: 5,
  Large: 8
}

var mySize = TShirtSize.Large;

Getting Textarea Value with jQuery

It can be done at easily like as:

     <a id="send-thoughts" href="">Click</a>
     <textarea id="message"></textarea>

        $("a#send-thoughts").click(function() {
            var thought = $("#message").val();
            alert(thought);
        });

Django - how to create a file and save it to a model's FileField?

You want to have a look at FileField and FieldFile in the Django docs, and especially FieldFile.save().

Basically, a field declared as a FileField, when accessed, gives you an instance of class FieldFile, which gives you several methods to interact with the underlying file. So, what you need to do is:

self.license_file.save(new_name, new_contents)

where new_name is the filename you wish assigned and new_contents is the content of the file. Note that new_contents must be an instance of either django.core.files.File or django.core.files.base.ContentFile (see given links to manual for the details).

The two choices boil down to:

from django.core.files.base import ContentFile, File

# Using File
with open('/path/to/file') as f:
    self.license_file.save(new_name, File(f))

# Using ContentFile
self.license_file.save(new_name, ContentFile('A string with the file content'))

When should we use intern method of String on String literals

http://en.wikipedia.org/wiki/String_interning

string interning is a method of storing only one copy of each distinct string value, which must be immutable. Interning strings makes some string processing tasks more time- or space-efficient at the cost of requiring more time when the string is created or interned. The distinct values are stored in a string intern pool.

To check if string contains particular word

Not as complicated as they say, check this you will not regret.

String sentence = "Check this answer and you can find the keyword with this code";
String search  = "keyword";

if ( sentence.toLowerCase().indexOf(search.toLowerCase()) != -1 ) {

   System.out.println("I found the keyword");

} else {

   System.out.println("not found");

}

You can change the toLowerCase() if you want.

In Excel how to get the left 5 characters of each cell in a specified column and put them into a new column

I find, if the data is imported, you may need to use the trim command on top of it, to get your details. =LEFT(TRIM(B2),8) In my case, I was using it to find a IP range. 10.3.44.44 with mask 255.255.255.0, so response is: 10.3.44 Kind of handy.

how to deal with google map inside of a hidden div (Updated picture)

_x000D_
_x000D_
function init_map() {_x000D_
  var myOptions = {_x000D_
    zoom: 16,_x000D_
    center: new google.maps.LatLng(0.0, 0.0),_x000D_
    mapTypeId: google.maps.MapTypeId.ROADMAP_x000D_
  };_x000D_
  map = new google.maps.Map(document.getElementById('gmap_canvas'), myOptions);_x000D_
  marker = new google.maps.Marker({_x000D_
    map: map,_x000D_
    position: new google.maps.LatLng(0.0, 0.0)_x000D_
  });_x000D_
  infowindow = new google.maps.InfoWindow({_x000D_
    content: 'content'_x000D_
  });_x000D_
  google.maps.event.addListener(marker, 'click', function() {_x000D_
    infowindow.open(map, marker);_x000D_
  });_x000D_
  infowindow.open(map, marker);_x000D_
}_x000D_
google.maps.event.addDomListener(window, 'load', init_map);_x000D_
_x000D_
jQuery(window).resize(function() {_x000D_
  init_map();_x000D_
});_x000D_
jQuery('.open-map').on('click', function() {_x000D_
  init_map();_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src='https://maps.googleapis.com/maps/api/js?v=3.exp'></script>_x000D_
_x000D_
<button type="button" class="open-map"></button>_x000D_
<div style='overflow:hidden;height:250px;width:100%;'>_x000D_
  <div id='gmap_canvas' style='height:250px;width:100%;'></div>_x000D_
</div>
_x000D_
_x000D_
_x000D_

Android SharedPreferences in Fragment

The marked answer didn't work for me, I had to use

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());

EDIT:

Or just try removing the this:

SharedPreferences prefs = getActivity().getSharedPreferences("pref", Context.MODE_PRIVATE);

How can I get the count of milliseconds since midnight for the current?

  1. long timeNow = System.currentTimeMillis();
  2. System.out.println(new Date(timeNow));

Fri Apr 04 14:27:05 PDT 2014

Better way to generate array of all letters in the alphabet

Define any languages an enum, and call getAlphabet();

char[] armenianAlphabet = getAlphabet(LocaleLanguage.ARMENIAN);
char[] russianAlphabet = getAlphabet(LocaleLanguage.RUSSIAN);

// get uppercase alphabet 
char[] currentAlphabet = getAlphabet(true);
    
System.out.println(armenianAlphabet);
System.out.println(russianAlphabet);
System.out.println(currentAlphabet);

result

I/System.out: ??????????????????????????????????????

I/System.out: ????????????????????????????????

I/System.out: ABCDEFGHIJKLMNOPQRSTUVWXYZ

private char[] getAlphabet(){
    return getAlphabet(false);
}

private char[] getAlphabet(boolean flagToUpperCase){
    Locale locale = getResources().getConfiguration().locale;
    LocaleLanguage language = LocaleLanguage.getLocalLanguage(locale);
    return getAlphabet(language, flagToUpperCase);
}

private char[] getAlphabet(LocaleLanguage localeLanguage, boolean flagToUpperCase){
    if (localeLanguage == null)
        localeLanguage = LocaleLanguage.ENGLISH;

    char firstLetter = localeLanguage.getFirstLetter();
    char lastLetter = localeLanguage.getLastLetter();
    int alphabetSize = lastLetter - firstLetter + 1;

    char[] alphabet = new char[alphabetSize];

    for (int index = 0; index < alphabetSize; index++ ){
        alphabet[index] = (char) (index + firstLetter);
    }

    if (flagToUpperCase){
        alphabet = new String(alphabet).toUpperCase().toCharArray();
    }

    return alphabet;
}

private enum LocaleLanguage{
    ARMENIAN(new Locale("hy"), '?', '?'),
    RUSSIAN(new Locale("ru"), '?','?'),
    ENGLISH(new Locale("en"), 'a','z');

    private final Locale mLocale;
    private final char mFirstLetter;
    private final char mLastLetter;

    LocaleLanguage(Locale locale, char firstLetter, char lastLetter) {
        this.mLocale = locale;
        this.mFirstLetter = firstLetter;
        this.mLastLetter = lastLetter;
    }

    public Locale getLocale() {
        return mLocale;
    }

    public char getFirstLetter() {
        return mFirstLetter;
    }

    public char getLastLetter() {
        return mLastLetter;
    }

    public String getDisplayLanguage(){
        return getLocale().getDisplayLanguage();
    }

    public String getDisplayLanguage(LocaleLanguage locale){
        return getLocale().getDisplayLanguage(locale.getLocale());
    }

    @Nullable
    public static LocaleLanguage getLocalLanguage(Locale locale){
        if (locale == null)
            return LocaleLanguage.ENGLISH;

        for (LocaleLanguage localeLanguage : LocaleLanguage.values()){
            if (localeLanguage.getLocale().getLanguage().equals(locale.getLanguage()))
                return localeLanguage;
        }

        return null;
    }
}

filter items in a python dictionary where keys contain a specific string

Jonathon gave you an approach using dict comprehensions in his answer. Here is an approach that deals with your do something part.

If you want to do something with the values of the dictionary, you don't need a dictionary comprehension at all:

I'm using iteritems() since you tagged your question with

results = map(some_function, [(k,v) for k,v in a_dict.iteritems() if 'foo' in k])

Now the result will be in a list with some_function applied to each key/value pair of the dictionary, that has foo in its key.

If you just want to deal with the values and ignore the keys, just change the list comprehension:

results = map(some_function, [v for k,v in a_dict.iteritems() if 'foo' in k])

some_function can be any callable, so a lambda would work as well:

results = map(lambda x: x*2, [v for k,v in a_dict.iteritems() if 'foo' in k])

The inner list is actually not required, as you can pass a generator expression to map as well:

>>> map(lambda a: a[0]*a[1], ((k,v) for k,v in {2:2, 3:2}.iteritems() if k == 2))
[4]

Where is Python language used?

Many websites uses Django or Zope/Plone web framework, these are written in Python.

Python is used a lot for writing system administration software, usually when bash scripts (shell script) isn't up to the job, but going C/C++ is an overkill. This is also the spectrum where perl, awk, etc stands. Gentoo's emerge/portage is one example. Mercurial/HG is a distributed version control system (DVCS) written in python.

Many desktop applications are also written in Python. The original Bittorrent was written in python.

Python is also used as the scripting languages for GIMP, Inkscape, Blender, OpenOffice, etc. Python allows advanced users to write plugins and access advanced functionalities that cannot typically be used through a GUI.

Online code beautifier and formatter

For PHP, Java, C++, C, Perl, JavaScript, CSS you can try:

http://www.prettyprinter.de/index.php

"An attempt was made to load a program with an incorrect format" even when the platforms are the same

1:Go to: Tools > Options > Projects and Solutions > Web Projects > Use the 64 bit version of IIS Express 2: change below setting for web service project. enter image description here

How to print the current Stack Trace in .NET without any exception?

An alternative to System.Diagnostics.StackTrace is to use System.Environment.StackTrace which returns a string-representation of the stacktrace.

Another useful option is to use the $CALLER and $CALLSTACK debugging variables in Visual Studio since this can be enabled run-time without rebuilding the application.

"Android library projects cannot be launched"?

In Eclipse Project -> Clean Modify project.properties like this :

target=android-10
android.library.reference.1=F:/svn/WiEngine_library

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

Most of the answers here have dealt with how to mange EOFError exceptions, which is really handy if you're unsure about whether the pickled object is empty or not.

However, if you're surprised that the pickle file is empty, it could be because you opened the filename through 'wb' or some other mode that could have over-written the file.

for example:

filename = 'cd.pkl'
with open(filename, 'wb') as f:
    classification_dict = pickle.load(f)

This will over-write the pickled file. You might have done this by mistake before using:

...
open(filename, 'rb') as f:

And then got the EOFError because the previous block of code over-wrote the cd.pkl file.

When working in Jupyter, or in the console (Spyder) I usually write a wrapper over the reading/writing code, and call the wrapper subsequently. This avoids common read-write mistakes, and saves a bit of time if you're going to be reading the same file multiple times through your travails

Array and string offset access syntax with curly braces is deprecated

It's really simple to fix the issue, however keep in mind that you should fork and commit your changes for each library you are using in their repositories to help others as well.

Let's say you have something like this in your code:

$str = "test";
echo($str{0});

since PHP 7.4 curly braces method to get individual characters inside a string has been deprecated, so change the above syntax into this:

$str = "test";
echo($str[0]);

Fixing the code in the question will look something like this:

public function getRecordID(string $zoneID, string $type = '', string $name = ''): string
{
    $records = $this->listRecords($zoneID, $type, $name);
    if (isset($records->result[0]->id)) {
        return $records->result[0]->id;
    }
    return false;
}

Dynamically set value of a file input

I ended up doing something like this for AngularJS in case someone stumbles across this question:

const imageElem = angular.element('#awardImg');

if (imageElem[0].files[0])
    vm.award.imageElem = imageElem;
    vm.award.image = imageElem[0].files[0];

And then:

if (vm.award.imageElem)
    $('#awardImg').replaceWith(vm.award.imageElem);
    delete vm.award.imageElem;

Django 1.7 - "No migrations to apply" when run migrate after makemigrations

In my case I wrote like this:

python manage.py makemigrations --empty yourappname

python manage.py migrate yourappname

or:

Django keeps track of all the applied migrations in django_migrations table. So just delete all the rows in the django_migrations table that are related to you app like:

DELETE FROM django_migrations WHERE app='your-app-name'

and then do:

python manage.py makemigrations python manage.py migrate

How to replace specific values in a oracle database column?

In Oracle, there is the concept of schema name, so try using this

update schemname.tablename t
set t.columnname = replace(t.columnname, t.oldvalue, t.newvalue);

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException Error

NullPointerExceptions are among the easier exceptions to diagnose, frequently. Whenever you get an exception in Java and you see the stack trace ( that's what your second quote-block is called, by the way ), you read from top to bottom. Often, you will see exceptions that start in Java library code or in native implementations methods, for diagnosis you can just skip past those until you see a code file that you wrote.

Then you like at the line indicated and look at each of the objects ( instantiated classes ) on that line -- one of them was not created and you tried to use it. You can start by looking up in your code to see if you called the constructor on that object. If you didn't, then that's your problem, you need to instantiate that object by calling new Classname( arguments ). Another frequent cause of NullPointerExceptions is accidentally declaring an object with local scope when there is an instance variable with the same name.

In your case, the exception occurred in your constructor for Workshop on line 75. <init> means the constructor for a class. If you look on that line in your code, you'll see the line

denimjeansButton.addItemListener(this);

There are fairly clearly two objects on this line: denimjeansButton and this. this is synonymous with the class instance you are currently in and you're in the constructor, so it can't be this. denimjeansButton is your culprit. You never instantiated that object. Either remove the reference to the instance variable denimjeansButton or instantiate it.

What is the difference between char array and char pointer in C?

You're not allowed to change the contents of a string constant, which is what the first p points to. The second p is an array initialized with a string constant, and you can change its contents.

How to change the current URL in javascript?

Even it is not a good way of doing what you want try this hint: var url = MUST BE A NUMER FIRST

function nextImage (){
url = url + 1;  
location.href='http://mywebsite.com/' + url+'.html';
}

How to convert a PNG image to a SVG?

A png is a bitmap image style and an SVG is a vector-based graphics design which supports bitmaps so it's not as if it would convert the image to vectors, just an image embedded in a vector-based format. You could do this using http://www.inkscape.org/ which is free. It would embed it, however it also has a Live Trace like engine which will try to convert it to paths if you wish (using potrace). See live trace in adobe illustrator (commericial) is an example:

http://graphicssoft.about.com/od/illustrator/ss/sflivetrace.htm

Case statement in MySQL

MySQL also has IF():

SELECT 
  id, action_heading, 
      IF(action_type='Income',action_amount,0) income, 
      IF(action_type='Expense', action_amount, 0) expense
FROM tbl_transaction

How to check if an app is installed from a web-page on an iPhone?

As far as I know you can not, from a browser, check if an app is installed or not.

But you can try redirecting the phone to the app, and if nothing happens redirect the phone to a specified page, like this:

setTimeout(function () { window.location = "https://itunes.apple.com/appdir"; }, 25);
window.location = "appname://";

If the second line of code gives a result then the first row is never executed.

Hope this helps!

Similar question:

How to find and turn on USB debugging mode on Nexus 4

In case you enabled debugging mode on your phone and adb devices is not listing your device, it seems there is a problem with phone driver. You might not install the usb-driver of your phone or driver might be installed with problems (in windows check in system --> device manager).

In my case, I had the same problem with My HTC android usb device which installing drivers again, fixed my problems.

efficient way to implement paging

In 2008 we cant use Skip().Take()

The way is:

var MinPageRank = (PageNumber - 1) * NumInPage + 1
var MaxPageRank = PageNumber * NumInPage

var visit = Visita.FromSql($"SELECT * FROM (SELECT [RANK] = ROW_NUMBER() OVER (ORDER BY Hora DESC),* FROM Visita WHERE ) A WHERE A.[RANK] BETWEEN {MinPageRank} AND {MaxPageRank}").ToList();

Difference between Interceptor and Filter in Spring MVC

A HandlerInterceptor gives you more fine-grained control than a filter, because you have access to the actual target "handler" - this means that whatever action you perform can vary depending on what the request is actually doing (whereas the servlet filter is generically applied to all requests - only able to take into account the parameters of each request). The handlerInterceptor also provides 3 different methods, so that you can apply behavior prior to calling a handler, after the handler has completed but prior to view rendering (where you may even bypass view rendering altogether), or after the view itself has been rendered. Also, you can set up different interceptors for different groups of handlers - the interceptors are configured on the handlerMapping, and there may be multiple handlerMappings.

Therefore, if you have a need to do something completely generic (e.g. log all requests), then a filter is sufficient - but if the behavior depends on the target handler or you want to do something between the request handling and view rendering, then the HandlerInterceptor provides that flexibility.

Reference: http://static.springframework.org/sp...ng-interceptor

Multi-gradient shapes

Try this method then you can do every thing you want.
It is like a stack so be careful which item comes first or last.

<?xml version="1.0" encoding="utf-8"?>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:right="50dp" android:start="10dp" android:left="10dp">
    <shape
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle">
        <corners android:radius="3dp" />
        <solid android:color="#012d08"/>
    </shape>
</item>
<item android:top="50dp">
    <shape android:shape="rectangle">
        <solid android:color="#7c4b4b" />
    </shape>
</item>
<item android:top="90dp" android:end="60dp">
    <shape android:shape="rectangle">
        <solid android:color="#e2cc2626" />
    </shape>
</item>
<item android:start="50dp" android:bottom="20dp" android:top="120dp">
    <shape android:shape="rectangle">
        <solid android:color="#360e0e" />
    </shape>
</item>

Removing multiple files from a Git repo that have already been deleted from disk

Not that it really matters, but I disagree with the chose answer:

git add -u 

... will remove files from the index if the corresponding files in the working tree have been removed, but it will also stage the modified new contents of tracked files.

git rm $(git ls-files --deleted)

... on the other hand will only rm the deleted files that were tracked.

So the latter in my view is the better option.

Assign static IP to Docker container

Not a direct answer but it could help.

I run most of my dockerized services tied to own static ips using the next approach:

  1. I create ip aliases for all services on docker host
  2. Then I run each service redirecting ports from this ip into container so each service have own static ip which could be used by external users and other containers.

Sample:

docker run --name dns --restart=always -d -p 172.16.177.20:53:53/udp dns
docker run --name registry --restart=always -d -p 172.16.177.12:80:5000 registry
docker run --name cache --restart=always -d -p 172.16.177.13:80:3142 -v /data/cache:/var/cache/apt-cacher-ng cache
docker run --name mirror --restart=always -d -p 172.16.177.19:80:80 -v /data/mirror:/usr/share/nginx/html:ro mirror
...

How to extract duration time from ffmpeg output?

If you want to retrieve the length (and possibly all other metadata) from your media file with ffmpeg by using a python script you could try this:

import subprocess
import json

input_file  = "< path to your input file here >"

metadata = subprocess.check_output(f"ffprobe -i {input_file} -v quiet -print_format json -show_format -hide_banner".split(" "))

metadata = json.loads(metadata)
print(f"Length of file is: {float(metadata['format']['duration'])}")
print(metadata)

Output:

Length of file is: 7579.977143

{
  "streams": [
    {
      "index": 0,
      "codec_name": "mp3",
      "codec_long_name": "MP3 (MPEG audio layer 3)",
      "codec_type": "audio",
      "codec_time_base": "1/44100",
      "codec_tag_string": "[0][0][0][0]",
      "codec_tag": "0x0000",
      "sample_fmt": "fltp",
      "sample_rate": "44100",
      "channels": 2,
      "channel_layout": "stereo",
      "bits_per_sample": 0,
      "r_frame_rate": "0/0",
      "avg_frame_rate": "0/0",
      "time_base": "1/14112000",
      "start_pts": 353600,
      "start_time": "0.025057",
      "duration_ts": 106968637440,
      "duration": "7579.977143",
      "bit_rate": "320000",
      ...
      ...

How to parse the AndroidManifest.xml file inside an .apk package

apk-parser, https://github.com/caoqianli/apk-parser, a lightweight impl for java, with no dependency for aapt or other binarys, is good for parse binary xml files, and other apk infos.

ApkParser apkParser = new ApkParser(new File(filePath));
// set a locale to translate resource tag into specific strings in language the locale specified, you set locale to Locale.ENGLISH then get apk title 'WeChat' instead of '@string/app_name' for example
apkParser.setPreferredLocale(locale);

String xml = apkParser.getManifestXml();
System.out.println(xml);

String xml2 = apkParser.transBinaryXml(xmlPathInApk);
System.out.println(xml2);

ApkMeta apkMeta = apkParser.getApkMeta();
System.out.println(apkMeta);

Set<Locale> locales = apkParser.getLocales();
for (Locale l : locales) {
    System.out.println(l);
}
apkParser.close();

Parse JSON object with string and value only

You need to get a list of all the keys, loop over them and add them to your map as shown in the example below:

    String s = "{menu:{\"1\":\"sql\", \"2\":\"android\", \"3\":\"mvc\"}}";
    JSONObject jObject  = new JSONObject(s);
    JSONObject  menu = jObject.getJSONObject("menu");

    Map<String,String> map = new HashMap<String,String>();
    Iterator iter = menu.keys();
    while(iter.hasNext()){
        String key = (String)iter.next();
        String value = menu.getString(key);
        map.put(key,value);
    }

How to resize superview to fit all subviews with autolayout?

Eric Baker's comment tipped me off to the core idea that in order for a view to have its size be determined by the content placed within it, then the content placed within it must have an explicit relationship with the containing view in order to drive its height (or width) dynamically. "Add subview" does not create this relationship as you might assume. You have to choose which subview is going to drive the height and/or width of the container... most commonly whatever UI element you have placed in the lower right hand corner of your overall UI. Here's some code and inline comments to illustrate the point.

Note, this may be of particular value to those working with scroll views since it's common to design around a single content view that determines its size (and communicates this to the scroll view) dynamically based on whatever you put in it. Good luck, hope this helps somebody out there.

//
//  ViewController.m
//  AutoLayoutDynamicVerticalContainerHeight
//

#import "ViewController.h"

@interface ViewController ()
@property (strong, nonatomic) UIView *contentView;
@property (strong, nonatomic) UILabel *myLabel;
@property (strong, nonatomic) UILabel *myOtherLabel;
@end

@implementation ViewController

- (void)viewDidLoad
{
    // INVOKE SUPER
    [super viewDidLoad];

    // INIT ALL REQUIRED UI ELEMENTS
    self.contentView = [[UIView alloc] init];
    self.myLabel = [[UILabel alloc] init];
    self.myOtherLabel = [[UILabel alloc] init];
    NSDictionary *viewsDictionary = NSDictionaryOfVariableBindings(_contentView, _myLabel, _myOtherLabel);

    // TURN AUTO LAYOUT ON FOR EACH ONE OF THEM
    self.contentView.translatesAutoresizingMaskIntoConstraints = NO;
    self.myLabel.translatesAutoresizingMaskIntoConstraints = NO;
    self.myOtherLabel.translatesAutoresizingMaskIntoConstraints = NO;

    // ESTABLISH VIEW HIERARCHY
    [self.view addSubview:self.contentView]; // View adds content view
    [self.contentView addSubview:self.myLabel]; // Content view adds my label (and all other UI... what's added here drives the container height (and width))
    [self.contentView addSubview:self.myOtherLabel];

    // LAYOUT

    // Layout CONTENT VIEW (Pinned to left, top. Note, it expects to get its vertical height (and horizontal width) dynamically based on whatever is placed within).
    // Note, if you don't want horizontal width to be driven by content, just pin left AND right to superview.
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_contentView]" options:0 metrics:0 views:viewsDictionary]]; // Only pinned to left, no horizontal width yet
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_contentView]" options:0 metrics:0 views:viewsDictionary]]; // Only pinned to top, no vertical height yet

    /* WHATEVER WE ADD NEXT NEEDS TO EXPLICITLY "PUSH OUT ON" THE CONTAINING CONTENT VIEW SO THAT OUR CONTENT DYNAMICALLY DETERMINES THE SIZE OF THE CONTAINING VIEW */
    // ^To me this is what's weird... but okay once you understand...

    // Layout MY LABEL (Anchor to upper left with default margin, width and height are dynamic based on text, font, etc (i.e. UILabel has an intrinsicContentSize))
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_myLabel]" options:0 metrics:0 views:viewsDictionary]];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[_myLabel]" options:0 metrics:0 views:viewsDictionary]];

    // Layout MY OTHER LABEL (Anchored by vertical space to the sibling label that comes before it)
    // Note, this is the view that we are choosing to use to drive the height (and width) of our container...

    // The LAST "|" character is KEY, it's what drives the WIDTH of contentView (red color)
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[_myOtherLabel]-|" options:0 metrics:0 views:viewsDictionary]];

    // Again, the LAST "|" character is KEY, it's what drives the HEIGHT of contentView (red color)
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[_myLabel]-[_myOtherLabel]-|" options:0 metrics:0 views:viewsDictionary]];

    // COLOR VIEWS
    self.view.backgroundColor = [UIColor purpleColor];
    self.contentView.backgroundColor = [UIColor redColor];
    self.myLabel.backgroundColor = [UIColor orangeColor];
    self.myOtherLabel.backgroundColor = [UIColor greenColor];

    // CONFIGURE VIEWS

    // Configure MY LABEL
    self.myLabel.text = @"HELLO WORLD\nLine 2\nLine 3, yo";
    self.myLabel.numberOfLines = 0; // Let it flow

    // Configure MY OTHER LABEL
    self.myOtherLabel.text = @"My OTHER label... This\nis the UI element I'm\narbitrarily choosing\nto drive the width and height\nof the container (the red view)";
    self.myOtherLabel.numberOfLines = 0;
    self.myOtherLabel.font = [UIFont systemFontOfSize:21];
}

@end

How to resize superview to fit all subviews with autolayout.png

Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.9.4 or earlier

Update

data.table v1.9.6+ now supports OP's original attempt and the following answer is no longer necessary.


You can use DT[order(-rank(x), y)].

   x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6

How to send data to COM PORT using JAVA?

This question has been asked and answered many times:

Read file from serial port using Java

Reading serial port in Java

Reading file from serial port in Java

Is there Java library or framework for accessing Serial ports?

Java Serial Communication on Windows

to reference a few.

Personally I recommend SerialPort from http://serialio.com - it's not free, but it's well worth the developer (no royalties) licensing fee for any commercial project. Sadly, it is no longer royalty free to deploy, and SerialIO.com seems to have remade themselves as a hardware seller; I had to search for information on SerialPort.

From personal experience, I strongly recommend against the Sun, IBM and RxTx implementations, all of which were unstable in 24/7 use. Refer to my answers on some of the aforementioned questions for details. To be perfectly fair, RxTx may have come a long way since I tried it, though the Sun and IBM implementations were essentially abandoned, even back then.

A newer free option that looks promising and may be worth trying is jSSC (Java Simple Serial Connector), as suggested by @Jodes comment.

Single controller with multiple GET methods in ASP.NET Web API

Simple Alternative

Just use a query string.

Routing

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{id}",
    defaults: new { id = RouteParameter.Optional }
);

Controller

public class TestController : ApiController
{
    public IEnumerable<SomeViewModel> Get()
    {
    }

    public SomeViewModel GetById(int objectId)
    {
    }
}

Requests

GET /Test
GET /Test?objectId=1

Note

Keep in mind that the query string param should not be "id" or whatever the parameter is in the configured route.

How to use source: function()... and AJAX in JQuery UI autocomplete

When you ask about:

Blockquote // But what now? How do I display my data? Blockquote

you need to map an array of object, that way:

response([{label: 'result_name', value: 'result_id'},]);

That way when you use the select event of the autocomplete plugin, you can see the result bellow;

Result of the select event

You can use the select event that way:

jQuery("#field").autocomplete({
      source: function (request, response) {

      },
      minLength: 3,
      select: function(event, ui)
      {
        console.log(ui);
      }
  });

I hope that it can help and complement the answers.

Initializing a member array in constructor initializer

Workaround:

template<class T, size_t N>
struct simple_array { // like std::array in C++0x
   T arr[N];
};


class C : private simple_array<int, 3> 
{
      static simple_array<int, 3> myarr() {
           simple_array<int, 3> arr = {1,2,3};
           return arr;
      }
public:
      C() : simple_array<int, 3>(myarr()) {}
};

Convert SQL Server result set into string

The answer from brad.v is incorrect! It won't give you a concatenated string.

Here's the correct code, almost like brad.v's but with one important change:

DECLARE @results VarChar(1000)
  SELECT @results = CASE
     WHEN @results IS NULL THEN CONVERT( VarChar(20), [StudentId])
     ELSE @results + ', ' + CONVERT( VarChar(20), [StudentId])
  END
FROM Student WHERE condition = abc;

See the difference? :) brad.v please fix your answer, I can't do anything to correct it or comment on it 'cause my reputation here is zero. I guess I can remove mine after you fix yours. Thanks!

How to decrypt a password from SQL server?

You cannot decrypt this password again but there is another method named "pwdcompare". Here is a example how to use it with SQL syntax:

USE TEMPDB
GO
declare @hash varbinary (255)
CREATE TABLE tempdb..h (id_num int, hash varbinary (255))
SET @hash = pwdencrypt('123') -- encryption
INSERT INTO tempdb..h (id_num,hash) VALUES (1,@hash)
SET @hash = pwdencrypt('123')
INSERT INTO tempdb..h (id_num,hash) VALUES (2,@hash)
SELECT TOP 1 @hash = hash FROM tempdb..h WHERE id_num = 2
SELECT pwdcompare ('123', @hash) AS [Success of check] -- Comparison
SELECT * FROM tempdb..h
INSERT INTO tempdb..h (id_num,hash) 
VALUES (3,CONVERT(varbinary (255),
0x01002D60BA07FE612C8DE537DF3BFCFA49CD9968324481C1A8A8FE612C8DE537DF3BFCFA49CD9968324481C1A8A8))
SELECT TOP 1 @hash = hash FROM tempdb..h WHERE id_num = 3
SELECT pwdcompare ('123', @hash) AS [Success of check] -- Comparison
SELECT * FROM tempdb..h
DROP TABLE tempdb..h
GO

How to count the number of lines of a string in javascript

Hmm yeah... what you're doing is absolutely wrong. When you say str.split("\r\n|\r|\n") it will try to find the exact string "\r\n|\r|\n". That's where you're wrong. There's no such occurance in the whole string. What you really want is what David Hedlund suggested:

lines = str.split(/\r\n|\r|\n/);
return lines.length;

The reason is that the split method doesn't convert strings into regular expressions in JavaScript. If you want to use a regexp, use a regexp.

PHPExcel - creating multiple sheets by iteration

When you first instantiate the $objPHPExcel, it already has a single sheet (sheet 0); you're then adding a new sheet (which will become sheet 1), but setting active sheet to sheet $i (when $i is 0)... so you're renaming and populating the original worksheet created when you instantiated $objPHPExcel rather than the one you've just added... this is your title "0".

You're also using the createSheet() method, which both creates a new worksheet and adds it to the workbook... but you're also adding it again yourself which is effectively adding the sheet in two position.

So first iteration, you already have sheet0, add a new sheet at both indexes 1 and 2, and edit/title sheet 0. Second iteration, you add a new sheet at both indexes 3 and 4, and edit/title sheet 1, but because you have the same sheet at indexes 1 and 2 this effectively writes to the sheet at index 2. Third iteration, you add a new sheet at indexes 5 and 6, and edit/title sheet 2, overwriting your earlier editing/titleing of sheet 1 which acted against sheet 2 instead.... and so on

How to pass parameters to ThreadStart method in Thread?

You could also delegate like so...

ThreadStart ts = delegate
{
      bool moreWork = DoWork("param1", "param2", "param3");
      if (moreWork) 
      {
          DoMoreWork("param1", "param2");
      }
};
new Thread(ts).Start();

Read a text file line by line in Qt

QFile inputFile(QString("/path/to/file"));
inputFile.open(QIODevice::ReadOnly);
if (!inputFile.isOpen())
    return;

QTextStream stream(&inputFile);
QString line = stream.readLine();
while (!line.isNull()) {
    /* process information */

    line = stream.readLine();
};

The resource could not be loaded because the App Transport Security policy requires the use of a secure connection

iOS 9 (may) force developers to use App Transport Security exclusively. I overheard this somewhere randomly so I don't know whether this is true myself. But I suspect it and have come to this conclusion:

The app running on iOS 9 will (maybe) no longer connect to a Meteor server without SSL.

This means running meteor run ios or meteor run ios-device will (probably?) no longer work.

In the app's info.plist, NSAppTransportSecurity [Dictionary] needs to have a key NSAllowsArbitraryLoads [Boolean] to be set to YES or Meteor needs to use https for its localhost server soon.

What are best practices for REST nested resources?

I disagree with this kind of path

GET /companies/{companyId}/departments

If you want to get departments, I think it's better to use a /departments resource

GET /departments?companyId=123

I suppose you have a companies table and a departments table then classes to map them in the programming language you use. I also assume that departments could be attached to other entities than companies, so a /departments resource is straightforward, it's convenient to have resources mapped to tables and also you don't need as many endpoints since you can reuse

GET /departments?companyId=123

for any kind of search, for instance

GET /departments?name=xxx
GET /departments?companyId=123&name=xxx
etc.

If you want to create a department, the

POST /departments

resource should be used and the request body should contain the company ID (if the department can be linked to only one company).

window.open with target "_blank" in Chrome

As Dennis says, you can't control how the browser chooses to handle target=_blank.

If you're wondering about the inconsistent behavior, probably it's pop-up blocking. Many browsers will forbid new windows from being opened apropos of nothing, but will allow new windows to be spawned as the eventual result of a mouse-click event.

Set HTML element's style property in javascript

You can try grabbing the cssText and className.

var css1 = table.rows[1].style.cssText;
var css2 = table.rows[2].style.cssText;
var class1 = table.rows[1].className;
var class2 = table.rows[2].className;

// sort

// loop
    if (i%2==0) {
        table.rows[i].style.cssText = css1;
        table.rows[i].className = class1;
    } else {
        table.rows[i].style.cssText = css2;
        table.rows[i].className = class2;
    }

Not entirely sure about browser compatibility with cssText, though.

Setting the number of map tasks and reduce tasks

To explain it with a example:

Assume your hadoop input file size is 2 GB and you set block size as 64 MB so 32 Mappers tasks are set to run while each mapper will process 64 MB block to complete the Mapper Job of your Hadoop Job.

==> Number of mappers set to run are completely dependent on 1) File Size and 2) Block Size

Assume you have running hadoop on a cluster size of 4: Assume you set mapred.map.tasks and mapred.reduce.tasks parameters in your conf file to the nodes as follows:

Node 1: mapred.map.tasks = 4 and mapred.reduce.tasks = 4
Node 2: mapred.map.tasks = 2 and mapred.reduce.tasks = 2
Node 3: mapred.map.tasks = 4 and mapred.reduce.tasks = 4
Node 4: mapred.map.tasks = 1 and mapred.reduce.tasks = 1

Assume you set the above paramters for 4 of your nodes in this cluster. If you notice Node 2 has set only 2 and 2 respectively because the processing resources of the Node 2 might be less e.g(2 Processors, 2 Cores) and Node 4 is even set lower to just 1 and 1 respectively might be due to processing resources on that node is 1 processor, 2 cores so can't run more than 1 mapper and 1 reducer task.

So when you run the job Node 1, Node 2, Node 3, Node 4 are configured to run a max. total of (4+2+4+1)11 mapper tasks simultaneously out of 42 mapper tasks that needs to be completed by the Job. After each Node completes its map tasks it will take the remaining mapper tasks left in 42 mapper tasks.

Now comming to reducers, as you set mapred.reduce.tasks = 0 so we only get mapper output in to 42 files(1 file for each mapper task) and no reducer output.

How to write the Fibonacci Sequence?

How about this one? I guess it's not as fancy as the other suggestions because it demands the initial specification of the previous result to produce the expected output, but I feel is a very readable option, i.e., all it does is to provide the result and the previous result to the recursion.

#count the number of recursions
num_rec = 0

def fibonacci(num, prev, num_rec, cycles):

    num_rec = num_rec + 1

    if num == 0 and prev == 0:
        result  = 0;
        num = 1;
    else:
        result = num + prev

    print(result)

    if num_rec == cycles:
        print("done")
    else:
        fibonacci(result, num, num_rec, cycles)

#Run the fibonacci function 10 times
fibonacci(0, 0, num_rec, 10)

Here's the output:

0
1
1
2
3
5
8
13
21
34
done

What is the difference between origin and upstream on GitHub?

after cloning a fork you have to explicitly add a remote upstream, with git add remote "the original repo you forked from". This becomes your upstream, you mostly fetch and merge from your upstream. Any other business such as pushing from your local to upstream should be done using pull request.

What's the difference between & and && in MATLAB?

A good rule of thumb when constructing arguments for use in conditional statements (IF, WHILE, etc.) is to always use the &&/|| forms, unless there's a very good reason not to. There are two reasons...

  1. As others have mentioned, the short-circuiting behavior of &&/|| is similar to most C-like languages. That similarity / familiarity is generally considered a point in its favor.
  2. Using the && or || forms forces you to write the full code for deciding your intent for vector arguments. When a = [1 0 0 1] and b = [0 1 0 1], is a&b true or false? I can't remember the rules for MATLAB's &, can you? Most people can't. On the other hand, if you use && or ||, you're FORCED to write the code "in full" to resolve the condition.

Doing this, rather than relying on MATLAB's resolution of vectors in & and |, leads to code that's a little bit more verbose, but a LOT safer and easier to maintain.

Toad for Oracle..How to execute multiple statements?

You can either go for f5 it will execute all the scrips on the tab.

Or

You can create a sql file and put all the insert statements in it and than give the file path in sql plus and execute.

What's the fastest way of checking if a point is inside a polygon in python

Your test is good, but it measures only some specific situation: we have one polygon with many vertices, and long array of points to check them within polygon.

Moreover, I suppose that you're measuring not matplotlib-inside-polygon-method vs ray-method, but matplotlib-somehow-optimized-iteration vs simple-list-iteration

Let's make N independent comparisons (N pairs of point and polygon)?

# ... your code...
lenpoly = 100
polygon = [[np.sin(x)+0.5,np.cos(x)+0.5] for x in np.linspace(0,2*np.pi,lenpoly)[:-1]]

M = 10000
start_time = time()
# Ray tracing
for i in range(M):
    x,y = np.random.random(), np.random.random()
    inside1 = ray_tracing_method(x,y, polygon)
print "Ray Tracing Elapsed time: " + str(time()-start_time)

# Matplotlib mplPath
start_time = time()
for i in range(M):
    x,y = np.random.random(), np.random.random()
    inside2 = path.contains_points([[x,y]])
print "Matplotlib contains_points Elapsed time: " + str(time()-start_time)

Result:

Ray Tracing Elapsed time: 0.548588991165
Matplotlib contains_points Elapsed time: 0.103765010834

Matplotlib is still much better, but not 100 times better. Now let's try much simpler polygon...

lenpoly = 5
# ... same code

result:

Ray Tracing Elapsed time: 0.0727779865265
Matplotlib contains_points Elapsed time: 0.105288982391

How do I change the android actionbar title and icon

You just need to add these 3 lines of code. Replace the icon with your own icon. If you want to generate icons use this

getSupportActionBar().setHomeAsUpIndicator(R.drawable.icon_back_arrow);
getActionBar().setHomeButtonEnabled(true);
getActionBar().setDisplayHomeAsUpEnabled(true);

Fill Combobox from database

You will have to completely re-write your code. DisplayMember and ValueMember point to columnNames! Furthermore you should really use a using block - so the connection gets disposed (and closed) after query execution.

Instead of using a dataReader to access the values I choosed a dataTable and bound it as dataSource onto the comboBox.

using (SqlConnection conn = new SqlConnection(@"Data Source=SHARKAWY;Initial Catalog=Booking;Persist Security Info=True;User ID=sa;Password=123456"))
{
    try
    {
        string query = "select FleetName, FleetID from fleets";
        SqlDataAdapter da = new SqlDataAdapter(query, conn);
        conn.Open();
        DataSet ds = new DataSet();
        da.Fill(ds, "Fleet");
        cmbTripName.DisplayMember =  "FleetName";
        cmbTripName.ValueMember = "FleetID";
        cmbTripName.DataSource = ds.Tables["Fleet"];
    }
    catch (Exception ex)
    {
        // write exception info to log or anything else
        MessageBox.Show("Error occured!");
    }               
}

Using a dataTable may be a little bit slower than a dataReader but I do not have to create my own class. If you really have to/want to make use of a DataReader you may choose @Nattrass approach. In any case you should write a using block!

EDIT

If you want to get the current Value of the combobox try this

private void cmbTripName_SelectedIndexChanged(object sender, EventArgs e)
{
    if (cmbTripName.SelectedItem != null)
    {
        DataRowView drv = cmbTripName.SelectedItem as DataRowView;

        Debug.WriteLine("Item: " + drv.Row["FleetName"].ToString());
        Debug.WriteLine("Value: " + drv.Row["FleetID"].ToString());
        Debug.WriteLine("Value: " + cmbTripName.SelectedValue.ToString());
    }
}

Convert MFC CString to integer

i've written a function that extract numbers from string:

int SnirElgabsi::GetNumberFromCString(CString src, CString str, int length) {
   // get startIndex
   int startIndex = src.Find(str) + CString(str).GetLength();
   // cut the string
   CString toreturn = src.Mid(startIndex, length);
   // convert to number
   return _wtoi(toreturn); // atoi(toreturn)
}

Usage:

CString str = _T("digit:1, number:102");
int  digit = GetNumberFromCString(str, _T("digit:"), 1);
int number = GetNumberFromCString(str, _T("number:"), 3);

How to create a md5 hash of a string in C?

Here's a complete example:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(__APPLE__)
#  define COMMON_DIGEST_FOR_OPENSSL
#  include <CommonCrypto/CommonDigest.h>
#  define SHA1 CC_SHA1
#else
#  include <openssl/md5.h>
#endif

char *str2md5(const char *str, int length) {
    int n;
    MD5_CTX c;
    unsigned char digest[16];
    char *out = (char*)malloc(33);

    MD5_Init(&c);

    while (length > 0) {
        if (length > 512) {
            MD5_Update(&c, str, 512);
        } else {
            MD5_Update(&c, str, length);
        }
        length -= 512;
        str += 512;
    }

    MD5_Final(digest, &c);

    for (n = 0; n < 16; ++n) {
        snprintf(&(out[n*2]), 16*2, "%02x", (unsigned int)digest[n]);
    }

    return out;
}

    int main(int argc, char **argv) {
        char *output = str2md5("hello", strlen("hello"));
        printf("%s\n", output);
        free(output);
        return 0;
    }

How to get rid of blank pages in PDF exported from SSRS

I've successfully used pdftk to remove pages I didn't want/need in pdfs. You can download the program here

You might try something like the following. Taken from here under examples

Remove 'page 13' from in1.pdf to create out1.pdf pdftk in.pdf cat 1-12 14-end output out1.pdf

or:

pdftk A=in1.pdf cat A1-12 A14-end output out1.pdf

Horizontal scroll on overflow of table

The solution for those who cannot or do not want to wrap the table in a div (e.g. if the HTML is generated from Markdown) but still want to have scrollbars:

_x000D_
_x000D_
table {_x000D_
  display: block;_x000D_
  max-width: -moz-fit-content;_x000D_
  max-width: fit-content;_x000D_
  margin: 0 auto;_x000D_
  overflow-x: auto;_x000D_
  white-space: nowrap;_x000D_
}
_x000D_
<table>_x000D_
  <tr>_x000D_
    <td>Especially on mobile, a table can easily become wider than the viewport.</td>_x000D_
    <td>Using the right CSS, you can get scrollbars on the table without wrapping it.</td>_x000D_
  </tr>_x000D_
</table>_x000D_
_x000D_
<table>_x000D_
  <tr>_x000D_
    <td>A centered table.</td>_x000D_
  </tr>_x000D_
</table>
_x000D_
_x000D_
_x000D_

Explanation: display: block; makes it possible to have scrollbars. By default (and unlike tables), blocks span the full width of the parent element. This can be prevented with max-width: fit-content;, which allows you to still horizontally center tables with less content using margin: 0 auto;. white-space: nowrap; is optional (but useful for this demonstration).

What does ':' (colon) do in JavaScript?

The ':' is a delimiter for key value pairs basically. In your example it is a Javascript Object Literal notation.

In javascript, Objects are defined with the colon delimiting the identifier for the property, and its value so you can have the following:

return { 
    Property1 : 125,
    Property2 : "something",
    Method1 : function() { /* do nothing */ },
    array: [5, 3, 6, 7]
};

and then use it like:

var o =  { 
    property1 : 125,
    property2 : "something",
    method1 : function() { /* do nothing */ },
    array: [5, 3, 6, 7]
};

alert(o.property1); // Will display "125"

A subset of this is also known as JSON (Javascript Object Notation) which is useful in AJAX calls because it is compact and quick to parse in server-side languages and Javascript can easily de-serialize a JSON string into an object.

// The parenthesis '(' & ')' around the object are important here
var o = eval('(' + "{key: \"value\"}" + ')');

You can also put the key inside quotes if it contains some sort of special character or spaces, but I wouldn't recommend that because it just makes things harder to work with.

Keep in mind that JavaScript Object Literal Notation in the JavaScript language is different from the JSON standard for message passing. The main difference between the 2 is that functions and constructors are not part of the JSON standard, but are allowed in JS object literals.

How should I have explained the difference between an Interface and an Abstract class?

In abstract class, you can write default implementation of methods! But in Interface you can not. Basically, In interface there exist pure virtual methods which have to be implemented by the class which implements the interface.

How to detect tableView cell touched or clicked in swift

In Swift 3.0

You can find the event for the touch/click of the cell of tableview through it delegate method. As well, can find the section and row value of the cell like this.

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
       print("section: \(indexPath.section)")
       print("row: \(indexPath.row)")
}

How to run certain task every day at a particular time using ScheduledExecutorService?

Just to add up on Victor's answer.

I would recommend to add a check to see, if the variable (in his case the long midnight) is higher than 1440. If it is, I would omit the .plusDays(1), otherwise the task will only run the day after tomorrow.

I did it simply like this:

Long time;

final Long tempTime = LocalDateTime.now().until(LocalDate.now().plusDays(1).atTime(7, 0), ChronoUnit.MINUTES);
if (tempTime > 1440) {
    time = LocalDateTime.now().until(LocalDate.now().atTime(7, 0), ChronoUnit.MINUTES);
} else {
    time = tempTime;
}

Count how many files in directory PHP

Working Demo

<?php

$directory = "../images/team/harry/"; // dir location
if (glob($directory . "*.*") != false)
{
 $filecount = count(glob($directory . "*.*"));
 echo $filecount;
}
else
{
 echo 0;
}

?>

How to set label size in Bootstrap

You'll have to do 2 things to make a Bootstrap label (or anything really) adjust sizes based on screen size:

  • Use a media query per display size range to adjust the CSS.
  • Override CSS sizing set by Bootstrap. You do this by making your CSS rules more specific than Bootstrap's. By default, Bootstrap sets .label { font-size: 75% }. So any extra selector on your CSS rule will make it more specific.

Here's an example CSS listing to accomplish what you are asking, using the default 4 sizes in Bootstrap:

@media (max-width: 767) {
    /* your custom css class on a parent will increase specificity */
    /* so this rule will override Bootstrap's font size setting */
    .autosized .label { font-size: 14px; }
}

@media (min-width: 768px) and (max-width: 991px) {
    .autosized .label { font-size: 16px; }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .autosized .label { font-size: 18px; }
}

@media (min-width: 1200px) {
    .autosized .label { font-size: 20px; }
}

Here is how it could be used in the HTML:

<!-- any ancestor could be set to autosized -->
<div class="autosized">
    ...
        ...
            <span class="label label-primary">Label 1</span>
</div>

How to install SimpleJson Package for Python

Download the source code, unzip it to and directory, and execute python setup.py install.

CSS: stretching background image to 100% width and height of screen?

I would recommend background-size: cover; if you don't want your background to lose its proportions: JS Fiddle

html { 
  background: url(image/path) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

Source: http://css-tricks.com/perfect-full-page-background-image/

How to Set focus to first text input in a bootstrap modal after shown

I got that bootstrap added the following info on their page:

Due to how HTML5 defines its semantics, the autofocus HTML attribute has no effect in Bootstrap modals. To achieve the same effect, use some custom JavaScript:

$('#myModal').on('shown.bs.modal', function () {
  $('#myInput').focus()
})

http://getbootstrap.com/javascript/#modals

Play a Sound with Python

I just released a simple python wrapper around sox that will play a sound with Python. It's very easy to install as you need Python 2.6 or greater, sox (easy to get binaries for most architectures) and the wrapper ( https://github.com/standarddeviant/sound4python ). If you don't have sox, go here: http://sourceforge.net/projects/sox/files/sox/

You would play audio with it by:

from sound4python import sound
import random
a = []
for idx in xrange(1*16000):
    a.append(random.randint(-16384,16384))
sound(a)

Keep in mind, the only parts actually involved in playing audio are just these:

from sound4python import sound
...
sound(a)    

How can I check the size of a collection within a Django template?

A list is considered to be False if it has no elements, so you can do something like this:

{% if mylist %}
    <p>I have a list!</p>
{% else %}
    <p>I don't have a list!</p>
{% endif %}

Spark - Error "A master URL must be set in your configuration" when submitting an app

try this

make trait

import org.apache.spark.sql.SparkSession
trait SparkSessionWrapper {
   lazy val spark:SparkSession = {
      SparkSession
        .builder()
        .getOrCreate()
    }
}

extends it

object Preprocess extends SparkSessionWrapper {

How to send a compressed archive that contains executables so that Google's attachment filter won't reject it

To bypass google's check, which is what you really want, simply remove the extensions from the file when you send it, and add them back after you download it. For example:

  • tar czvf file.tar.gz directory
  • mv file.tar.gz filetargz
  • [send filetargz via gmail]
  • [download filetargz]
  • [rename filetargz to file.tar.gz and open]

How to check if the given string is palindrome?

Const-correct C/C++ pointer solution. Minimal operations in loop.

int IsPalindrome (const char *str)
{
    const unsigned len = strlen(str);
    const char *end = &str[len-1];
    while (str < end)
        if (*str++ != *end--)
            return 0;
    return 1;
}

Why can a function modify some arguments as perceived by the caller, but not others?

Python is a pure pass-by-value language if you think about it the right way. A python variable stores the location of an object in memory. The Python variable does not store the object itself. When you pass a variable to a function, you are passing a copy of the address of the object being pointed to by the variable.

Contrasst these two functions

def foo(x):
    x[0] = 5

def goo(x):
    x = []

Now, when you type into the shell

>>> cow = [3,4,5]
>>> foo(cow)
>>> cow
[5,4,5]

Compare this to goo.

>>> cow = [3,4,5]
>>> goo(cow)
>>> goo
[3,4,5]

In the first case, we pass a copy the address of cow to foo and foo modified the state of the object residing there. The object gets modified.

In the second case you pass a copy of the address of cow to goo. Then goo proceeds to change that copy. Effect: none.

I call this the pink house principle. If you make a copy of your address and tell a painter to paint the house at that address pink, you will wind up with a pink house. If you give the painter a copy of your address and tell him to change it to a new address, the address of your house does not change.

The explanation eliminates a lot of confusion. Python passes the addresses variables store by value.

Slide up/down effect with ng-show and ng-animate

I've written an Angular directive that does slideToggle() without jQuery.

https://github.com/EricWVGG/AngularSlideables

matplotlib savefig in jpeg format

You can save an image as 'png' and use the python imaging library (PIL) to convert this file to 'jpg':

import Image
import matplotlib.pyplot as plt

plt.plot(range(10))
plt.savefig('testplot.png')
Image.open('testplot.png').save('testplot.jpg','JPEG')

The original:

enter image description here

The JPEG image:

enter image description here

MySQL error 2006: mysql server has gone away

I've encountered this a number of times and I've normally found the answer to be a very low default setting of max_allowed_packet.

Raising it in /etc/my.cnf (under [mysqld]) to 8 or 16M usually fixes it. (The default in MySql 5.7 is 4194304, which is 4MB.)

[mysqld]
max_allowed_packet=16M

Note: Just create the line if it does not exist

Note: This can be set on your server as it's running.

Use set global max_allowed_packet=104857600. This sets it to 100MB.

Hunk #1 FAILED at 1. What's that mean?

It is an error generated by patch. If you would open the .patch file, you'd see that it's organized in a bunch of segments, so-called "hunks". Every hunk identifies corresponding pieces of code (by line numbers) in the old and new version, the differences between those pieces of code, and similarities between them (the "context").

A hunk might fail if the similarities of a hunk don't match what's in the original file. When you see this error, it is almost always because you're using a patch for the wrong version of the code you're patching. There are a few ways to work around this:

  • Get an updated version of libdvdnav that already includes the patch (best option).
  • Get a .patch file for the version of libdvdnav you're patching.
  • Patch manually. For every hunk in the patch, try to locate the corresponding file and lines in libdvdnav, and correct them according to the instructions in the patch.
  • Take the version of libdvdnav that's closer to whatever version the .patch file was intended for (probably a bad idea).

fe_sendauth: no password supplied

Do not use passwords. Use peer authentication instead:

postgres://myuser@%2Fvar%2Frun%2Fpostgresql/mydb

Crystal Reports 13 And Asp.Net 3.5

I have same problem. I solved install this setup. (I use vs 2015 (4.6))

Internal vs. Private Access Modifiers

Find an explanation below. You can check this link for more details - http://www.dotnetbull.com/2013/10/public-protected-private-internal-access-modifier-in-c.html

Private: - Private members are only accessible within the own type (Own class).

Internal: - Internal member are accessible only within the assembly by inheritance (its derived type) or by instance of class.

enter image description here

Reference :

dotnetbull - what is access modifier in c#

How do I get the XML root node with C#?

Try this

XElement root = XDocument.Load(fStream).Root;

MongoDB - admin user not authorized

For MongoDB shell version v4.2.8 I've tried different ways to back-up my database with auth, my winner solution is

mongodump -h <your_hostname> -d <your_db_name> -u <your_db_username> -p <your_db_password> --authenticationDatabase admin -o /path/to/where/i/want

For loop in Oracle SQL

You are pretty confused my friend. There are no LOOPS in SQL, only in PL/SQL. Here's a few examples based on existing Oracle table - copy/paste to see results:

-- Numeric FOR loop --
set serveroutput on -->> do not use in TOAD --
DECLARE
  k NUMBER:= 0;
BEGIN
  FOR i IN 1..10 LOOP
    k:= k+1;
    dbms_output.put_line(i||' '||k);
 END LOOP;
END;
/

-- Cursor FOR loop --
set serveroutput on
DECLARE
   CURSOR c1 IS SELECT * FROM scott.emp;
   i NUMBER:= 0;
BEGIN
  FOR e_rec IN c1 LOOP
  i:= i+1;
    dbms_output.put_line(i||chr(9)||e_rec.empno||chr(9)||e_rec.ename);
  END LOOP;
END;
/

-- SQL example to generate 10 rows --
SELECT 1 + LEVEL-1 idx
  FROM dual
CONNECT BY LEVEL <= 10
/

Why does multiplication repeats the number several times?

You cannot multiply an integer by a string. To be sure, you could try using the int (short for integer which means whole number) command, like this for example -

firstNumber = int(9)
secondNumber = int(1)
answer = (firstNumber*secondNumber)

Hope that helped :)

'xmlParseEntityRef: no name' warnings while loading xml into a php file

If you are getting this issue with opencart try editing

catalog/controller/extension/feed/google_sitemap.php For More info and How to do it refer this: xmlparseentityref-no-name-error

Get bytes from std::string in C++

If this is just plain vanilla C, then:

strcpy(buffer, text.c_str());

Assuming that buffer is allocated and large enough to hold the contents of 'text', which is the assumption in your original code.

If encrypt() takes a 'const char *' then you can use

encrypt(text.c_str())

and you do not need to copy the string.

Force overwrite of local file with what's in origin repo?

Simplest version, assuming you're working on the same branch that the file you want is on:

git checkout path/to/file.

I do this so often that I've got an alias set to gc='git checkout'.

Difference between using gradlew and gradle

gradlew is a wrapper(w - character) that uses gradle.

Under the hood gradlew performs three main things:

  • Download and install the correct gradle version
  • Parse the arguments
  • Call a gradle task

Using Gradle Wrapper we can distribute/share a project to everybody to use the same version and Gradle's functionality(compile, build, install...) even if it has not been installed.

To create a wrapper run:

gradle wrapper

This command generate:

gradle-wrapper.properties will contain the information about the Gradle distribution

*./ Is used on Unix to specify the current directory

Print a file's last modified date in Bash

If file name has no spaces:

ls -l <dir> | awk '{print $6, " ", $7, " ", $8, " ", $9 }'

This prints as the following format:

 Dec   21   20:03   a1.out
 Dec   21   20:04   a.cpp

If file names have space (you can use the following command for file names with no spaces too, just it looks complicated/ugly than the former):

 ls -l <dir> | awk '{printf ("%s %s %s ",  $6,  $7, $8); for (i=9;   i<=NF; i++){ printf ("%s ", $i)}; printf ("\n")}'

Append same text to every cell in a column in Excel

I just wrote this for another answer:

You would call it using the form using your example: appendTextToRange "[theRange]", ",".

Sub testit()
    appendTextToRange "A1:D4000", "hey there"
End Sub


Sub appendTextToRange(rngAddress As String, append As String)

    Dim arr() As Variant, c As Variant
    arr = Range(rngAddress).Formula

    For x = LBound(arr, 1) To UBound(arr, 1)
        For y = LBound(arr, 2) To UBound(arr, 2)
            Debug.Print arr(x, y)
            If arr(x, y) = "" Then
                arr(x, y) = append
            ElseIf Left(arr(x, y), 1) = "=" Then
                arr(x, y) = arr(x, y) & " & "" " & append & """"
            Else
                arr(x, y) = arr(x, y) & " " & append
            End If
        Next
    Next
    Range(rngAddress).Formula = arr

End Sub

How to access /storage/emulated/0/

Here, it is found at /mnt/shell/emulated/0

How big can a MySQL database get before performance starts to degrade

It's kind of pointless to talk about "database performance", "query performance" is a better term here. And the answer is: it depends on the query, data that it operates on, indexes, hardware, etc. You can get an idea of how many rows are going to be scanned and what indexes are going to be used with EXPLAIN syntax.

2GB does not really count as a "large" database - it's more of a medium size.

Difference between JPanel, JFrame, JComponent, and JApplet

JFrame and JApplet are top level containers. If you wish to create a desktop application, you will use JFrame and if you plan to host your application in browser you will use JApplet.

JComponent is an abstract class for all Swing components and you can use it as the base class for your new component. JPanel is a simple usable component you can use for almost anything.

Since this is for a fun project, the simplest way for you is to work with JPanel and then host it inside JFrame or JApplet. Netbeans has a visual designer for Swing with simple examples.

Javascript: Unicode string to hex

how do you get "\u6f22\u5b57" from ?? in JavaScript?

These are JavaScript Unicode escape sequences e.g. \u12AB. To convert them, you could iterate over every code unit in the string, call .toString(16) on it, and go from there.

However, it is more efficient to also use hexadecimal escape sequences e.g. \xAA in the output wherever possible.

Also note that ASCII symbols such as A, b, and - probably don’t need to be escaped.

I’ve written a small JavaScript library that does all this for you, called jsesc. It has lots of options to control the output.

Here’s an online demo of the tool in action: http://mothereff.in/js-escapes#1%E6%BC%A2%E5%AD%97


Your question was tagged as utf-8. Reading the rest of your question, UTF-8 encoding/decoding didn’t seem to be what you wanted here, but in case you ever need it: use utf8.js (online demo).

Reliable way for a Bash script to get the full path to itself

The simplest way that I have found to get a full canonical path in Bash is to use cd and pwd:

ABSOLUTE_PATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/$(basename "${BASH_SOURCE[0]}")"

Using ${BASH_SOURCE[0]} instead of $0 produces the same behavior regardless of whether the script is invoked as <name> or source <name>.

What is the C++ function to raise a number to a power?

Note that the use of pow(x,y) is less efficient than x*x*x y times as shown and answered here https://stackoverflow.com/a/2940800/319728.

So if you're going for efficiency use x*x*x.

Convert char array to a int number in C

I personally don't like atoi function. I would suggest sscanf:

char myarray[5] = {'-', '1', '2', '3', '\0'};
int i;
sscanf(myarray, "%d", &i);

It's very standard, it's in the stdio.h library :)

And in my opinion, it allows you much more freedom than atoi, arbitrary formatting of your number-string, and probably also allows for non-number characters at the end.

EDIT I just found this wonderful question here on the site that explains and compares 3 different ways to do it - atoi, sscanf and strtol. Also, there is a nice more-detailed insight into sscanf (actually, the whole family of *scanf functions).

EDIT2 Looks like it's not just me personally disliking the atoi function. Here's a link to an answer explaining that the atoi function is deprecated and should not be used in newer code.

How to remove the Flutter debug banner?

There is also another way for removing the "debug" banner from the flutter app. Now after new release there is no "debugShowCheckedModeBanner: false," code line in main .dart file. So I think these methods are effective:

  1. If you are using VS Code, then install "Dart DevTools" from extensions. After installation, you can easily find "Dart DevTools" text icon at the bottom of the VS Code. When you click on that text icon, a link will be open in google chrome. From that link page, you can easily remove the banner by just tapping on the banner icon as shown in this screenshot.

NOTE:-- Dart DevTools is a dart language debugger extension in VS Code

  1. If Dart DevTools is already installed in your VS Code, then you can directly open the google chrome and open this URL = "127.0.0.1: ZZZZZ/?hide=debugger&port=XXXXX"

NOTE:-- In this link replace "XXXXX" by 5 digit port-id (on which your flutter app is running) which will vary whenever you use "flutter run" command and replace "ZZZZZ" by your global(unchangeable) 5 digit debugger-id

NOTE:-- these dart dev tools are only for "Google Chrome Browser"

git push to specific branch

git push origin amd_qlp_tester will work for you. If you just type git push, then the remote of the current branch is the default value.

Syntax of push looks like this - git push <remote> <branch>. If you look at your remote in .git/config file, you will see an entry [remote "origin"] which specifies url of the repository. So, in the first part of command you will tell Git where to find repository for this project, and then you just specify a branch.

pypi UserWarning: Unknown distribution option: 'install_requires'

It works fine if you follow the official documentation:

import setuptools
setuptools.setup(...)

Source: https://packaging.python.org/tutorials/packaging-projects/#creating-setup-py

Spring Boot REST service exception handling

What about this code ? I use a fallback request mapping to catch 404 errors.

@Controller
@ControllerAdvice
public class ExceptionHandlerController {

    @ExceptionHandler(Exception.class)
    public ModelAndView exceptionHandler(HttpServletRequest request, HttpServletResponse response, Exception ex) {
        //If exception has a ResponseStatus annotation then use its response code
        ResponseStatus responseStatusAnnotation = AnnotationUtils.findAnnotation(ex.getClass(), ResponseStatus.class);

        return buildModelAndViewErrorPage(request, response, ex, responseStatusAnnotation != null ? responseStatusAnnotation.value() : HttpStatus.INTERNAL_SERVER_ERROR);
    }

    @RequestMapping("*")
    public ModelAndView fallbackHandler(HttpServletRequest request, HttpServletResponse response) throws Exception {
        return buildModelAndViewErrorPage(request, response, null, HttpStatus.NOT_FOUND);
    }

    private ModelAndView buildModelAndViewErrorPage(HttpServletRequest request, HttpServletResponse response, Exception ex, HttpStatus httpStatus) {
        response.setStatus(httpStatus.value());

        ModelAndView mav = new ModelAndView("error.html");
        if (ex != null) {
            mav.addObject("title", ex);
        }
        mav.addObject("content", request.getRequestURL());
        return mav;
    }

}

Closing a Userform with Unload Me doesn't work

Without seeing your full code, this is impossible to answer with any certainty. The error usually occurs when you are trying to unload a control rather than the form.

Make sure that you don't have the "me" in brackets.

Also if you can post the full code for the userform it would help massively.

HTML5 canvas ctx.fillText won't do line breaks?

I don't think this is possible neither, but a workaround for this is to create a <p>element and position it with Javascript.

X11/Xlib.h not found in Ubuntu

A quick search using...

apt search Xlib.h

Turns up the package libx11-dev but you shouldn't need this for pure OpenGL programming. What tutorial are you using?

You can add Xlib.h to your system by running the following...

sudo apt install libx11-dev

What does file:///android_asset/www/index.html mean?

The URI "file:///android_asset/" points to YourProject/app/src/main/assets/.

Note: android_asset/ uses the singular (asset) and src/main/assets uses the plural (assets).

Suppose you have a file YourProject/app/src/main/assets/web_thing.html that you would like to display in a WebView. You can refer to it like this:

WebView webViewer = (WebView) findViewById(R.id.webViewer);
webView.loadUrl("file:///android_asset/web_thing.html");

The snippet above could be located in your Activity class, possibly in the onCreate method.

Here is a guide to the overall directory structure of an android project, that helped me figure out this answer.

Remove by _id in MongoDB console

Even though this post is outdated, collection.remove is deprecated! collection.delete_one should be used instead!

More information can be found here under #remove

Android "gps requires ACCESS_FINE_LOCATION" error, even though my manifest file contains this

ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION, and WRITE_EXTERNAL_STORAGE are all part of the Android 6.0 runtime permission system. In addition to having them in the manifest as you do, you also have to request them from the user at runtime (using requestPermissions()) and see if you have them (using checkSelfPermission()).

One workaround in the short term is to drop your targetSdkVersion below 23.

But, eventually, you will want to update your app to use the runtime permission system.

For example, this activity works with five permissions. Four are runtime permissions, though it is presently only handling three (I wrote it before WRITE_EXTERNAL_STORAGE was added to the runtime permission roster).

/***
 Copyright (c) 2015 CommonsWare, LLC
 Licensed under the Apache License, Version 2.0 (the "License"); you may not
 use this file except in compliance with the License. You may obtain a copy
 of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
 by applicable law or agreed to in writing, software distributed under the
 License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
 OF ANY KIND, either express or implied. See the License for the specific
 language governing permissions and limitations under the License.

 From _The Busy Coder's Guide to Android Development_
 https://commonsware.com/Android
 */

package com.commonsware.android.permmonger;

import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
  private static final String[] INITIAL_PERMS={
    Manifest.permission.ACCESS_FINE_LOCATION,
    Manifest.permission.READ_CONTACTS
  };
  private static final String[] CAMERA_PERMS={
    Manifest.permission.CAMERA
  };
  private static final String[] CONTACTS_PERMS={
      Manifest.permission.READ_CONTACTS
  };
  private static final String[] LOCATION_PERMS={
      Manifest.permission.ACCESS_FINE_LOCATION
  };
  private static final int INITIAL_REQUEST=1337;
  private static final int CAMERA_REQUEST=INITIAL_REQUEST+1;
  private static final int CONTACTS_REQUEST=INITIAL_REQUEST+2;
  private static final int LOCATION_REQUEST=INITIAL_REQUEST+3;
  private TextView location;
  private TextView camera;
  private TextView internet;
  private TextView contacts;
  private TextView storage;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    location=(TextView)findViewById(R.id.location_value);
    camera=(TextView)findViewById(R.id.camera_value);
    internet=(TextView)findViewById(R.id.internet_value);
    contacts=(TextView)findViewById(R.id.contacts_value);
    storage=(TextView)findViewById(R.id.storage_value);

    if (!canAccessLocation() || !canAccessContacts()) {
      requestPermissions(INITIAL_PERMS, INITIAL_REQUEST);
    }
  }

  @Override
  protected void onResume() {
    super.onResume();

    updateTable();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.actions, menu);

    return(super.onCreateOptionsMenu(menu));
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()) {
      case R.id.camera:
        if (canAccessCamera()) {
          doCameraThing();
        }
        else {
          requestPermissions(CAMERA_PERMS, CAMERA_REQUEST);
        }
        return(true);

      case R.id.contacts:
        if (canAccessContacts()) {
          doContactsThing();
        }
        else {
          requestPermissions(CONTACTS_PERMS, CONTACTS_REQUEST);
        }
        return(true);

      case R.id.location:
        if (canAccessLocation()) {
          doLocationThing();
        }
        else {
          requestPermissions(LOCATION_PERMS, LOCATION_REQUEST);
        }
        return(true);
    }

    return(super.onOptionsItemSelected(item));
  }

  @Override
  public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    updateTable();

    switch(requestCode) {
      case CAMERA_REQUEST:
        if (canAccessCamera()) {
          doCameraThing();
        }
        else {
          bzzzt();
        }
        break;

      case CONTACTS_REQUEST:
        if (canAccessContacts()) {
          doContactsThing();
        }
        else {
          bzzzt();
        }
        break;

      case LOCATION_REQUEST:
        if (canAccessLocation()) {
          doLocationThing();
        }
        else {
          bzzzt();
        }
        break;
    }
  }

  private void updateTable() {
    location.setText(String.valueOf(canAccessLocation()));
    camera.setText(String.valueOf(canAccessCamera()));
    internet.setText(String.valueOf(hasPermission(Manifest.permission.INTERNET)));
    contacts.setText(String.valueOf(canAccessContacts()));
    storage.setText(String.valueOf(hasPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)));
  }

  private boolean canAccessLocation() {
    return(hasPermission(Manifest.permission.ACCESS_FINE_LOCATION));
  }

  private boolean canAccessCamera() {
    return(hasPermission(Manifest.permission.CAMERA));
  }

  private boolean canAccessContacts() {
    return(hasPermission(Manifest.permission.READ_CONTACTS));
  }

  private boolean hasPermission(String perm) {
    return(PackageManager.PERMISSION_GRANTED==checkSelfPermission(perm));
  }

  private void bzzzt() {
    Toast.makeText(this, R.string.toast_bzzzt, Toast.LENGTH_LONG).show();
  }

  private void doCameraThing() {
    Toast.makeText(this, R.string.toast_camera, Toast.LENGTH_SHORT).show();
  }

  private void doContactsThing() {
    Toast.makeText(this, R.string.toast_contacts, Toast.LENGTH_SHORT).show();
  }

  private void doLocationThing() {
    Toast.makeText(this, R.string.toast_location, Toast.LENGTH_SHORT).show();
  }
}

(from this sample project)

For the requestPermissions() function, should the parameters just be "ACCESS_COARSE_LOCATION"? Or should I include the full name "android.permission.ACCESS_COARSE_LOCATION"?

I would use the constants defined on Manifest.permission, as shown above.

Also, what is the request code?

That will be passed back to you as the first parameter to onRequestPermissionsResult(), so you can tell one requestPermissions() call from another.

angularjs make a simple countdown

Please take a look at this example here. It is a simple example of a count up! Which I think you could easily modify to create a count down.

http://jsfiddle.net/ganarajpr/LQGE2/

JavaScript code:

function AlbumCtrl($scope,$timeout) {
    $scope.counter = 0;
    $scope.onTimeout = function(){
        $scope.counter++;
        mytimeout = $timeout($scope.onTimeout,1000);
    }
    var mytimeout = $timeout($scope.onTimeout,1000);

    $scope.stop = function(){
        $timeout.cancel(mytimeout);
    }
}

HTML markup:

<!doctype html>
<html ng-app>
<head>
    <script src="http://code.angularjs.org/angular-1.0.0rc11.min.js"></script>
    <script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
</head>
<body>
<div ng-controller="AlbumCtrl">
    {{counter}}
    <button ng-click="stop()">Stop</button>    
</div>
</body>
</html>

What should be the values of GOPATH and GOROOT?

Here is one solution (single user):

GOROOT=$HOME/.local # your go executable is in $GOROOT/bin
GOPATH=$HOME/.gopath
PATH=$GOROOT/bin:$GOPATH/bin:$PATH

go complains if you change .gopath to .go.

I wish they went with how the rust/cargo guys did and just put everything at one place.

What should I do when 'svn cleanup' fails?

Whenever I have similar problems I use rsync (NB: I use Linux or Mac OS X) to help out like so:

# Go to the parent directory
cd dir_above_borked

# Rename corrupted directory
mv borked_dir borked_dir.bak

# Checkout a fresh copy
svn checkout svn://... borked_dir

# Copy the modified files to the fresh checkout
# - test rsync
#   (possibly use -c to verify all content and show only actually changed files)
rsync -nav --exclude=.svn borked_dir.bak/ borked_dir/

# - If all ok, run rsync for real
#   (possibly using -c again, possibly not using -v)
rsync -av --exclude=.svn borked_dir.bak/ borked_dir/

That way you have a fresh checkout, but with the same working files. For me this always works like a charm.

Disable scrolling in webview?

If you subclass Webview, you can simply override onTouchEvent to filter out the move-events that trigger scrolling.

public class SubWebView extends WebView {

    @Override
    public boolean onTouchEvent (MotionEvent ev)    {
        if(ev.getAction() == MotionEvent.ACTION_MOVE) {
            postInvalidate();
            return true;
        }
        return super.onTouchEvent(ev);
    }
    ...

How to create a hidden <img> in JavaScript?

This question is vague, but if you want to make the image with Javascript. It is simple.

function loadImages(src) {
  if (document.images) {
    img1 = new Image();
    img1.src = src;
}
loadImages("image.jpg");

The image will be requested but until you show it it will never be displayed. great for pre loading images you expect to be requests but delaying it until the document is loaded.

Example

How to do error logging in CodeIgniter (PHP)

In config.php add or edit the following lines to this:
------------------------------------------------------
$config['log_threshold'] = 4; // (1/2/3)
$config['log_path'] = '/home/path/to/application/logs/';

Run this command in the terminal:
----------------------------------
sudo chmod -R 777 /home/path/to/application/logs/

System.loadLibrary(...) couldn't find native library in my case

In my case i must exclude compiling sources by gradle and set libs path

android {

    ...
    sourceSets {
        ...
        main.jni.srcDirs = []
        main.jniLibs.srcDirs = ['libs']
    }
....

How to hide keyboard in swift on pressing return key?

Another way of doing this which mostly uses the storyboard and easily allows you to have multiple text fields is:

@IBAction func resignKeyboard(sender: AnyObject) {
    sender.resignFirstResponder()
}

Connect all your text fields for that view controller to that action on the Did End On Exit event of each field.

How do I clone a job in Jenkins?

All the answers here are super helpful but miss one very weird bug about Jenkins. After you have edited the new job configurations, sometimes if your zoom level is too high, you may not see the save or apply button option. The button is present on the page and hidden by your zoom level, you have to zoom out until you see the button at the bottom left of your page.

Strange, I know!

Opening a SQL Server .bak file (Not restoring!)

It doesn't seem possible with SQL Server 2008 alone. You're going to need a third-party tool's help.

It will help you make your .bak act like a live database:

http://www.red-gate.com/products/dba/sql-virtual-restore/

What is the purpose of a question mark after a type (for example: int? myVariable)?

To add on to the answers above, here is a code sample

struct Test
{
    int something;
}
struct NullableTest
{
    int something;
}
class Example
{
    public void Demo()
    {
        Test t = new Test();
        t = null;

        NullableTest? t2 = new NullableTest();
        t2 = null;
    }
}

This would give a compilation error:

Error 12 Cannot convert null to 'Test' because it is a non-nullable value type

Notice that there is no compilation error for NullableTest. (note the ? in the declaration of t2)

What's the difference between xsd:include and xsd:import?

Use xsd:include brings all declarations and definitions of an external schema document into the current schema.

Use xsd:import to bring in an XSD from a different namespace and used to build a new schema by extending existing schema documents..

git is not installed or not in the PATH

If you installed GitHubDesktop then the path for git.exe will be ,

C:\Users\<'Username'>\AppData\Local\GitHubDesktop\app-1.1.1\resources\app\git\cmd

Add this path to the environment variables by following,

** (Note: \cmd at the end, not \cmd\git.exe).**

Navigate to the Environmental Variables Editor and find the Path variable in the “System Variables” section. Click Edit… and paste the URL of Git to the end. Save!

Now open a new cmd and type command git. If you are able to see the git usage then it's done.

Now you can execute your command to install your package.

ex: npm install native-base --save

jQuery, checkboxes and .is(":checked")

Most fastest and easy way:

$('#myCheckbox').change(function(){
    alert(this.checked);
});

$el[0].checked;

$el - is jquery element of selection.

Enjoy!

Asp.Net WebApi2 Enable CORS not working with AspNet.WebApi.Cors 5.2.3

I've created a pared-down demo project for you.

You can try the above API Link from your local Fiddler to see the headers. Here is an explanation.

Global.ascx

All this does is call the WebApiConfig. It's nothing but code organization.

public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        WebApiConfig.Register(GlobalConfiguration.Configuration);
    }
}

WebApiConfig.cs

The key method for your here is the EnableCrossSiteRequests method. This is all that you need to do. The EnableCorsAttribute is a globally scoped CORS attribute.

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        EnableCrossSiteRequests(config);
        AddRoutes(config);
    }

    private static void AddRoutes(HttpConfiguration config)
    {
        config.Routes.MapHttpRoute(
            name: "Default",
            routeTemplate: "api/{controller}/"
        );
    }

    private static void EnableCrossSiteRequests(HttpConfiguration config)
    {
        var cors = new EnableCorsAttribute(
            origins: "*", 
            headers: "*", 
            methods: "*");
        config.EnableCors(cors);
    }
}

Values Controller

The Get method receives the EnableCors attribute that we applied globally. The Another method overrides the global EnableCors.

public class ValuesController : ApiController
{
    // GET api/values
    public IEnumerable<string> Get()
    {
        return new string[] { 
            "This is a CORS response.", 
            "It works from any origin." 
        };
    }

    // GET api/values/another
    [HttpGet]
    [EnableCors(origins:"http://www.bigfont.ca", headers:"*", methods: "*")]
    public IEnumerable<string> Another()
    {
        return new string[] { 
            "This is a CORS response. ", 
            "It works only from two origins: ",
            "1. www.bigfont.ca ",
            "2. the same origin." 
        };
    }
}

Web.config

You do not need to add anything special into web.config. In fact, this is what the demo's web.config looks like - it's empty.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
</configuration>

Demo

_x000D_
_x000D_
var url = "https://cors-webapi.azurewebsites.net/api/values"_x000D_
_x000D_
$.get(url, function(data) {_x000D_
  console.log("We expect this to succeed.");_x000D_
  console.log(data);_x000D_
});_x000D_
_x000D_
var url = "https://cors-webapi.azurewebsites.net/api/values/another"_x000D_
_x000D_
$.get(url, function(data) {_x000D_
  console.log(data);_x000D_
}).fail(function(xhr, status, text) {_x000D_
  console.log("We expect this to fail.");_x000D_
  console.log(status);_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
_x000D_
_x000D_
_x000D_

Find a file in python

In Python 3.4 or newer you can use pathlib to do recursive globbing:

>>> import pathlib
>>> sorted(pathlib.Path('.').glob('**/*.py'))
[PosixPath('build/lib/pathlib.py'),
 PosixPath('docs/conf.py'),
 PosixPath('pathlib.py'),
 PosixPath('setup.py'),
 PosixPath('test_pathlib.py')]

Reference: https://docs.python.org/3/library/pathlib.html#pathlib.Path.glob

In Python 3.5 or newer you can also do recursive globbing like this:

>>> import glob
>>> glob.glob('**/*.txt', recursive=True)
['2.txt', 'sub/3.txt']

Reference: https://docs.python.org/3/library/glob.html#glob.glob

How to print a int64_t type in C

In windows environment, use

%I64d

in Linux, use

%lld

How to convert timestamps to dates in Bash?

In PHP

$unix_time = 1256571985;

echo date("Y-m-d H:i:s",$unix_time)

How to read a file into a variable in shell?

In cross-platform, lowest-common-denominator sh you use:

#!/bin/sh
value=`cat config.txt`
echo "$value"

In bash or zsh, to read a whole file into a variable without invoking cat:

#!/bin/bash
value=$(<config.txt)
echo "$value"

Invoking cat in bash or zsh to slurp a file would be considered a Useless Use of Cat.

Note that it is not necessary to quote the command substitution to preserve newlines.

See: Bash Hacker's Wiki - Command substitution - Specialities.

Inline style to act as :hover in CSS

A simple solution:

   <a href="#" onmouseover="this.style.color='orange';" onmouseout="this.style.color='';">My Link</a>

Or

<script>
 /** Change the style **/
 function overStyle(object){
    object.style.color = 'orange';
    // Change some other properties ...
 }

 /** Restores the style **/
 function outStyle(object){
    object.style.color = 'orange';
    // Restore the rest ...
 }
</script>

<a href="#" onmouseover="overStyle(this)" onmouseout="outStyle(this)">My Link</a>

Rerender view on browser resize with React

It's a simple and short example of using es6 without jQuery.

import React, { Component } from 'react';

export default class CreateContact extends Component {
  state = {
    windowHeight: undefined,
    windowWidth: undefined
  }

  handleResize = () => this.setState({
    windowHeight: window.innerHeight,
    windowWidth: window.innerWidth
  });

  componentDidMount() {
    this.handleResize();
    window.addEventListener('resize', this.handleResize)
  }

  componentWillUnmount() {
    window.removeEventListener('resize', this.handleResize)
  }

  render() {
    return (
      <span>
        {this.state.windowWidth} x {this.state.windowHeight}
      </span>
    );
  }
}

hooks

import React, { useEffect, useState } from "react";

let App = () => {
  const [windowWidth, setWindowWidth] = useState(0);
  const [windowHeight, setWindowHeight] = useState(0);
  let resizeWindow = () => {
    setWindowWidth(window.innerWidth);
    setWindowHeight(window.innerHeight);
  };

  useEffect(() => {
    resizeWindow();
    window.addEventListener("resize", resizeWindow);
    return () => window.removeEventListener("resize", resizeWindow);
  }, []);

  return (
    <div>
      <span>
        {windowWidth} x {windowHeight}
      </span>
    </div>
  );
};

tmux set -g mouse-mode on doesn't work

As @Graham42 said, from version 2.1 mouse options has been renamed but you can use the mouse with any version of tmux adding this to your ~/.tmux.conf:

Bash shells:

is_pre_2_1="[[ $(tmux -V | cut -d' ' -f2) < 2.1 ]] && echo true || echo false"
if-shell "$is_pre_2_1" "setw -g mode-mouse on; set -g mouse-resize-pane on;\
      set -g mouse-select-pane on; set -g mouse-select-window on" "set -g mouse on"

Sh (Bourne shell) shells:

is_pre_2_1="tmux -V | cut -d' ' -f2 | awk '{print ($0 < 2.1) ? "true" : "false"}'"
if-shell "$is_pre_2_1" "setw -g mode-mouse on; set -g mouse-resize-pane on;\
      set -g mouse-select-pane on; set -g mouse-select-window on" "set -g mouse on"

Hope this helps

How to write data to a text file without overwriting the current data

You have to open as new StreamWriter(filename, true) so that it appends to the file instead of overwriting.

How to allow CORS in react.js?

It is better to add CORS enabling code on Server Side. To enable CORS in NodeJS and ExpressJs based application following code should be included-

var app = express();

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

Paging with Oracle

Ask Tom on pagination and very, very useful analytic functions.

This is excerpt from that page:

select * from (
    select /*+ first_rows(25) */
     object_id,object_name,
     row_number() over
    (order by object_id) rn
    from all_objects
)
where rn between :n and :m
order by rn;

How to make a owl carousel with arrows instead of next previous

This is how you do it in your $(document).ready() function with FontAwesome Icons:

 $( ".owl-prev").html('<i class="fa fa-chevron-left"></i>');
 $( ".owl-next").html('<i class="fa fa-chevron-right"></i>');

CSS last-child selector: select last-element of specific class, not last child inside of parent?

I guess that the most correct answer is: Use :nth-child (or, in this specific case, its counterpart :nth-last-child). Most only know this selector by its first argument to grab a range of items based on a calculation with n, but it can also take a second argument "of [any CSS selector]".

Your scenario could be solved with this selector: .commentList .comment:nth-last-child(1 of .comment)

But being technically correct doesn't mean you can use it, though, because this selector is as of now only implemented in Safari.

For further reading:

Better way to find control in ASP.NET

All the highlighted solutions are using recursion (which is performance costly). Here is cleaner way without recursion:

public T GetControlByType<T>(Control root, Func<T, bool> predicate = null) where T : Control 
{
    if (root == null) {
        throw new ArgumentNullException("root");
    }

    var stack = new Stack<Control>(new Control[] { root });

    while (stack.Count > 0) {
        var control = stack.Pop();
        T match = control as T;

        if (match != null && (predicate == null || predicate(match))) {
            return match;
        }

        foreach (Control childControl in control.Controls) {
           stack.Push(childControl);
        }
    }

    return default(T);
}

How to export all data from table to an insertable sql format?

I know this is an old question, but victorio also asked if there are any other options to copy data from one table to another. There is a very short and fast way to insert all the records from one table to another (which might or might not have similar design).

If you dont have identity column in table B_table:

INSERT INTO A_db.dbo.A_table
SELECT * FROM B_db.dbo.B_table

If you have identity column in table B_table, you have to specify columns to insert. Basically you select all except identity column, which will be auto incremented by default.

In case if you dont have existing B_table in B_db

SELECT *
INTO B_db.dbo.B_table
FROM A_db.dbo.A_table

will create table B_table in database B_db with all existing values

When to catch java.lang.Error?

And there are a couple of other cases where if you catch an Error, you have to rethrow it. For example ThreadDeath should never be caught, it can cause big problem is you catch it in a contained environment (eg. an application server) :

An application should catch instances of this class only if it must clean up after being terminated asynchronously. If ThreadDeath is caught by a method, it is important that it be rethrown so that the thread actually dies.

What are the differences between LDAP and Active Directory?

https://jumpcloud.com/blog/difference-between-ldap-and-active-directory/

Realistically, there are probably more differences than similarities between the two directory solutions. Microsoft’s AD is largely a directory for Windows users, devices, and applications. AD requires a Microsoft Domain Controller to be present and when it is, users are able to single sign-on to Windows resources that live within the domain structure.

LDAP, on the other hand, has largely worked outside of the Windows structure focusing on the Linux / Unix environment and with more technical applications. LDAP doesn’t have the same concepts of domains or single sign-on. LDAP is largely implemented with open source solutions and as a result has more flexibility than AD.

Another critical difference between LDAP and Active Directory is how AD and LDAP each approach device management. AD manages Windows devices through and Group Policy Objects (GPOs). A similar concept doesn’t exist within LDAP. Both LDAP and AD are highly different solutions and as a result many organization must leverage both to serve different purposes.

This is why there’s an obvious opportunity for innovation. Why leverage and manage two complete systems, when one system can effectively merge the two?

Pass parameters in setInterval function

Another solution consists in pass your function like that (if you've got dynamics vars) : setInterval('funca('+x+','+y+')',500);

How to read a .properties file which contains keys that have a period character using Shell script

@fork2x

I have tried like this .Please review and update me whether it is right approach or not.

#/bin/sh
function pause(){
   read -p "$*"
}

file="./apptest.properties"


if [ -f "$file" ]
then
    echo "$file found."

dbUser=`sed '/^\#/d' $file | grep 'db.uat.user'  | tail -n 1 | cut -d "=" -f2- | sed 's/^[[:space:]]*//;s/[[:space:]]*$//'`
dbPass=`sed '/^\#/d' $file | grep 'db.uat.passwd'  | tail -n 1 | cut -d "=" -f2- | sed 's/^[[:space:]]*//;s/[[:space:]]*$//'`

echo database user = $dbUser
echo database pass = $dbPass

else
    echo "$file not found."
fi

how to open a jar file in Eclipse

The jar file is just an executable java program. If you want to modify the code, you have to open the .java files.

How to detect running app using ADB command

If you want to directly get the package name of the current app in focus, use this adb command -

adb shell dumpsys window windows | grep -E 'mFocusedApp'| cut -d / -f 1 | cut -d " " -f 7

Extra info from the result of the adb command is removed using the cut command. Original solution from here.

Test for non-zero length string in Bash: [ -n "$var" ] or [ "$var" ]

Here are some more tests

True if string is not empty:

[ -n "$var" ]
[[ -n $var ]]
test -n "$var"
[ "$var" ]
[[ $var ]]
(( ${#var} ))
let ${#var}
test "$var"

True if string is empty:

[ -z "$var" ]
[[ -z $var ]]
test -z "$var"
! [ "$var" ]
! [[ $var ]]
! (( ${#var} ))
! let ${#var}
! test "$var"

How do I add more members to my ENUM-type column in MySQL?

It's possible if you believe. Hehe. try this code.

public function add_new_enum($new_value)
  {
    $table="product";
    $column="category";
         $row = $this->db->query("SELECT COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS
        WHERE TABLE_NAME = ? AND COLUMN_NAME = ?", array($table, $column))->row_array();

    $old_category = array();
    $new_category="";
    foreach (explode(',', str_replace("'", '', substr($row['COLUMN_TYPE'], 5, (strlen($row['COLUMN_TYPE']) - 6)))) as $val)
    {
        //getting the old category first

        $old_category[$val] = $val;
        $new_category.="'".$old_category[$val]."'".",";
    }

     //after the end of foreach, add the $new_value to $new_category

      $new_category.="'".$new_value."'";

    //Then alter the table column with the new enum

    $this->db->query("ALTER TABLE product CHANGE category category ENUM($new_category)");
  }

Before adding new value

After adding new value

Output of git branch in tree like fashion

You can use a tool called gitk.

Loop over array dimension in plpgsql

Since PostgreSQL 9.1 there is the convenient FOREACH:

DO
$do$
DECLARE
   m   varchar[];
   arr varchar[] := array[['key1','val1'],['key2','val2']];
BEGIN
   FOREACH m SLICE 1 IN ARRAY arr
   LOOP
      RAISE NOTICE 'another_func(%,%)',m[1], m[2];
   END LOOP;
END
$do$

Solution for older versions:

DO
$do$
DECLARE
   arr varchar[] := '{{key1,val1},{key2,val2}}';
BEGIN
   FOR i IN array_lower(arr, 1) .. array_upper(arr, 1)
   LOOP
      RAISE NOTICE 'another_func(%,%)',arr[i][1], arr[i][2];
   END LOOP;
END
$do$

Also, there is no difference between varchar[] and varchar[][] for the PostgreSQL type system. I explain in more detail here.

The DO statement requires at least PostgreSQL 9.0, and LANGUAGE plpgsql is the default (so you can omit the declaration).

hadoop copy a local file system folder to HDFS

From command line -

Hadoop fs -copyFromLocal

Hadoop fs -copyToLocal

Or you also use spark FileSystem library to get or put hdfs file.

Hope this is helpful.

How to exclude rows that don't join with another table?

Another solution is:

SELECT * FROM TABLE1 WHERE id NOT IN (SELECT id FROM TABLE2)

How to grep for two words existing on the same line?

Why do you pass -c? That will just show the number of matches. Similarly, there is no reason to use -r. I suggest you read man grep.

To grep for 2 words existing on the same line, simply do:

grep "word1" FILE | grep "word2"

grep "word1" FILE will print all lines that have word1 in them from FILE, and then grep "word2" will print the lines that have word2 in them. Hence, if you combine these using a pipe, it will show lines containing both word1 and word2.

If you just want a count of how many lines had the 2 words on the same line, do:

grep "word1" FILE | grep -c "word2"

Also, to address your question why does it get stuck : in grep -c "word1", you did not specify a file. Therefore, grep expects input from stdin, which is why it seems to hang. You can press Ctrl+D to send an EOF (end-of-file) so that it quits.

How to make HTML input tag only accept numerical values?

I have used regular expression to replace the input value with the pattern needed.

_x000D_
_x000D_
var userName = document.querySelector('#numberField');_x000D_
_x000D_
userName.addEventListener('input', restrictNumber);_x000D_
function restrictNumber (e) {  _x000D_
  var newValue = this.value.replace(new RegExp(/[^\d]/,'ig'), "");_x000D_
  this.value = newValue;_x000D_
}_x000D_
  
_x000D_
<input type="text" id="numberField">
_x000D_
_x000D_
_x000D_

How to negate code in "if" statement block in JavaScript -JQuery like 'if not then..'

You can use the Logical NOT ! operator:

if (!$(this).parent().next().is('ul')){

Or equivalently (see comments below):

if (! ($(this).parent().next().is('ul'))){

For more information, see the Logical Operators section of the MDN docs.

Git on Mac OS X v10.7 (Lion)

It's part of Xcode. You'll need to reinstall the developer tools.

IIS7 Permissions Overview - ApplicationPoolIdentity

Top Answer from Jon Adams

Here is how to implement this for the PowerShell folks

$IncommingPath = "F:\WebContent"
$Acl = Get-Acl $IncommingPath
$Ar = New-Object  system.security.accesscontrol.filesystemaccessrule("IIS AppPool\DefaultAppPool","FullControl","ContainerInherit, ObjectInherit", "None", "Allow")
$Acl.SetAccessRule($Ar)
Set-Acl $IncommingPath $Acl

How to create a Restful web service with input parameters?

You can try this... put parameters as :
http://localhost:8080/WebApplication11/webresources/generic/getText?arg1=hello in your browser...

package newpackage;

import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.DefaultValue;


import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PUT;
import javax.ws.rs.QueryParam;

@Path("generic")
public class GenericResource {

    @Context
    private UriInfo context;

    /**
     * Creates a new instance of GenericResource
     */
    public GenericResource() {
    }

    /**
     * Retrieves representation of an instance of newpackage.GenericResource

     * @return an instance of java.lang.String
     */
    @GET
    @Produces("text/plain")
    @Consumes("text/plain")
    @Path("getText/")
    public String getText(@QueryParam("arg1")
            @DefaultValue("") String arg1) {

       return  arg1 ;  }

    @PUT
    @Consumes("text/plain")
    public void putText(String content) {





    }
}

How to get different colored lines for different plots in a single figure?

I would like to offer a minor improvement on the last loop answer given in the previous post (that post is correct and should still be accepted). The implicit assumption made when labeling the last example is that plt.label(LIST) puts label number X in LIST with the line corresponding to the Xth time plot was called. I have run into problems with this approach before. The recommended way to build legends and customize their labels per matplotlibs documentation ( http://matplotlib.org/users/legend_guide.html#adjusting-the-order-of-legend-item) is to have a warm feeling that the labels go along with the exact plots you think they do:

...
# Plot several different functions...
labels = []
plotHandles = []
for i in range(1, num_plots + 1):
    x, = plt.plot(some x vector, some y vector) #need the ',' per ** below
    plotHandles.append(x)
    labels.append(some label)
plt.legend(plotHandles, labels, 'upper left',ncol=1)

**: Matplotlib Legends not working

android layout with visibility GONE

Done by having it like that:

view = inflater.inflate(R.layout.entry_detail, container, false);
TextView tp1= (TextView) view.findViewById(R.id.tp1);
LinearLayout layone= (LinearLayout) view.findViewById(R.id.layone);
tp1.setVisibility(View.VISIBLE);
layone.setVisibility(View.VISIBLE);

How to remove all CSS classes using jQuery/JavaScript?

I had similar issue. In my case on disabled elements was applied that aspNetDisabled class and all disabled controls had wrong colors. So, I used jquery to remove this class on every element/control I wont and everything works and looks great now.

This is my code for removing aspNetDisabled class:

$(document).ready(function () {

    $("span").removeClass("aspNetDisabled");
    $("select").removeClass("aspNetDisabled");
    $("input").removeClass("aspNetDisabled");

}); 

How do I define and use an ENUM in Objective-C?

I recommend using NS_OPTIONS or NS_ENUM. You can read more about it here: http://nshipster.com/ns_enum-ns_options/

Here's an example from my own code using NS_OPTIONS, I have an utility that sets a sublayer (CALayer) on a UIView's layer to create a border.

The h. file:

typedef NS_OPTIONS(NSUInteger, BSTCMBorder) {
    BSTCMBOrderNoBorder     = 0,
    BSTCMBorderTop          = 1 << 0,
    BSTCMBorderRight        = 1 << 1,
    BSTCMBorderBottom       = 1 << 2,
    BSTCMBOrderLeft         = 1 << 3
};

@interface BSTCMBorderUtility : NSObject

+ (void)setBorderOnView:(UIView *)view
                 border:(BSTCMBorder)border
                  width:(CGFloat)width
                  color:(UIColor *)color;

@end

The .m file:

@implementation BSTCMBorderUtility

+ (void)setBorderOnView:(UIView *)view
                 border:(BSTCMBorder)border
                  width:(CGFloat)width
                  color:(UIColor *)color
{

    // Make a left border on the view
    if (border & BSTCMBOrderLeft) {

    }

    // Make a right border on the view
    if (border & BSTCMBorderRight) {

    }

    // Etc

}

@end

Benefits of EBS vs. instance-store (and vice-versa)

The bottom line is you should almost always use EBS backed instances.

Here's why

  • EBS backed instances can be set so that they cannot be (accidentally) terminated through the API.
  • EBS backed instances can be stopped when you're not using them and resumed when you need them again (like pausing a Virtual PC), at least with my usage patterns saving much more money than I spend on a few dozen GB of EBS storage.
  • EBS backed instances don't lose their instance storage when they crash (not a requirement for all users, but makes recovery much faster)
  • You can dynamically resize EBS instance storage.
  • You can transfer the EBS instance storage to a brand new instance (useful if the hardware at Amazon you were running on gets flaky or dies, which does happen from time to time)
  • It is faster to launch an EBS backed instance because the image does not have to be fetched from S3.
  • If the hardware your EBS-backed instance is scheduled for maintenance, stopping and starting the instance automatically migrates to new hardware. I was also able to move an EBS-backed instance on failed hardware by force-stopping the instance and launching it again (your mileage may vary on failed hardware).

I'm a heavy user of Amazon and switched all of my instances to EBS backed storage as soon as the technology came out of beta. I've been very happy with the result.

EBS can still fail - not a silver bullet

Keep in mind that any piece of cloud-based infrastructure can fail at any time. Plan your infrastructure accordingly. While EBS-backed instances provide certain level of durability compared to ephemeral storage instances, they can and do fail. Have an AMI from which you can launch new instances as needed in any availability zone, back up your important data (e.g. databases), and if your budget allows it, run multiple instances of servers for load balancing and redundancy (ideally in multiple availability zones).

When Not To

At some points in time, it may be cheaper to achieve faster IO on Instance Store instances. There was a time when it was certainly true. Now there are many options for EBS storage, catering to many needs. The options and their pricing evolve constantly as technology changes. If you have a significant amount of instances that are truly disposable (they don't affect your business much if they just go away), do the math on cost vs. performance. EBS-backed instances can also die at any point in time, but my practical experience is that EBS is more durable.

AES vs Blowfish for file encryption

AES.

(I also am assuming you mean twofish not the much older and weaker blowfish)

Both (AES & twofish) are good algorithms. However even if they were equal or twofish was slightly ahead on technical merit I would STILL chose AES.

Why? Publicity. AES is THE standard for government encryption and thus millions of other entities also use it. A talented cryptanalyst simply gets more "bang for the buck" finding a flaw in AES then it does for the much less know and used twofish.

Obscurity provides no protection in encryption. More bodies looking, studying, probing, attacking an algorithm is always better. You want the most "vetted" algorithm possible and right now that is AES. If an algorithm isn't subject to intense and continual scrutiny you should place a lower confidence of it's strength. Sure twofish hasn't been compromised. Is that because of the strength of the cipher or simply because not enough people have taken a close look ..... YET

String formatting: % vs. .format vs. string literal

PEP 3101 proposes the replacement of the % operator with the new, advanced string formatting in Python 3, where it would be the default.

How to get height of <div> in px dimension

Use .height() like this:

var result = $("#myDiv").height();

There's also .innerHeight() and .outerHeight() depending on exactly what you want.

You can test it here, play with the padding/margins/content to see how it changes around.

Android SDK manager won't open

Make sure your java\bin directory is in your path statement before the windows\system32 directory. The SDK Manager uses java and it was finding the one in the system32 folder.

In a CMD window, you can run 'where java'. Don't forget to restart your CMD after changing the path variable for checking.

How can you find the height of text on an HTML canvas?

UPDATE - for an example of this working, I used this technique in the Carota editor.

Following on from ellisbben's answer, here is an enhanced version to get the ascent and descent from the baseline, i.e. same as tmAscent and tmDescent returned by Win32's GetTextMetric API. This is needed if you want to do a word-wrapped run of text with spans in different fonts/sizes.

Big Text on canvas with metric lines

The above image was generated on a canvas in Safari, red being the top line where the canvas was told to draw the text, green being the baseline and blue being the bottom (so red to blue is the full height).

Using jQuery for succinctness:

var getTextHeight = function(font) {

  var text = $('<span>Hg</span>').css({ fontFamily: font });
  var block = $('<div style="display: inline-block; width: 1px; height: 0px;"></div>');

  var div = $('<div></div>');
  div.append(text, block);

  var body = $('body');
  body.append(div);

  try {

    var result = {};

    block.css({ verticalAlign: 'baseline' });
    result.ascent = block.offset().top - text.offset().top;

    block.css({ verticalAlign: 'bottom' });
    result.height = block.offset().top - text.offset().top;

    result.descent = result.height - result.ascent;

  } finally {
    div.remove();
  }

  return result;
};

In addition to a text element, I add a div with display: inline-block so I can set its vertical-align style, and then find out where the browser has put it.

So you get back an object with ascent, descent and height (which is just ascent + descent for convenience). To test it, it's worth having a function that draws a horizontal line:

var testLine = function(ctx, x, y, len, style) {
  ctx.strokeStyle = style; 
  ctx.beginPath();
  ctx.moveTo(x, y);
  ctx.lineTo(x + len, y);
  ctx.closePath();
  ctx.stroke();
};

Then you can see how the text is positioned on the canvas relative to the top, baseline and bottom:

var font = '36pt Times';
var message = 'Big Text';

ctx.fillStyle = 'black';
ctx.textAlign = 'left';
ctx.textBaseline = 'top'; // important!
ctx.font = font;
ctx.fillText(message, x, y);

// Canvas can tell us the width
var w = ctx.measureText(message).width;

// New function gets the other info we need
var h = getTextHeight(font);

testLine(ctx, x, y, w, 'red');
testLine(ctx, x, y + h.ascent, w, 'green');
testLine(ctx, x, y + h.height, w, 'blue');

Receiving JSON data back from HTTP request

It's working fine for me by the following way -

public async Task<object> TestMethod(TestModel model)
    {
        try
        {
            var apicallObject = new
            {
                Id= model.Id,
                name= model.Name
            };

            if (apicallObject != null)
            {
                var bodyContent = JsonConvert.SerializeObject(apicallObject);
                using (HttpClient client = new HttpClient())
                {
                    var content = new StringContent(bodyContent.ToString(), Encoding.UTF8, "application/json");
                    content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
                    client.DefaultRequestHeaders.Add("access-token", _token); // _token = access token
                    var response = await client.PostAsync(_url, content); // _url =api endpoint url
                    if (response != null)
                    {
                        var jsonString = await response.Content.ReadAsStringAsync();

                        try
                        {
                            var result = JsonConvert.DeserializeObject<TestModel2>(jsonString); // TestModel2 = deserialize object
                        }
                        catch (Exception e){
                            //msg
                            throw e;
                        }
                    }
                }
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return null;
    }

Google Maps V3 marker with label

I doubt the standard library supports this.

But you can use the google maps utility library:

http://code.google.com/p/google-maps-utility-library-v3/wiki/Libraries#MarkerWithLabel

var myLatlng = new google.maps.LatLng(-25.363882,131.044922);

var myOptions = {
    zoom: 8,
    center: myLatlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };

map = new google.maps.Map(document.getElementById('map_canvas'), myOptions);

var marker = new MarkerWithLabel({
   position: myLatlng,
   map: map,
   draggable: true,
   raiseOnDrag: true,
   labelContent: "A",
   labelAnchor: new google.maps.Point(3, 30),
   labelClass: "labels", // the CSS class for the label
   labelInBackground: false
 });

The basics about marker can be found here: https://developers.google.com/maps/documentation/javascript/overlays#Markers

On select change, get data attribute value

document.querySelector('select').onchange = function(){   
   alert(this.selectedOptions[0].getAttribute('data-attr')); 
};

Foreach Control in form, how can I do something to all the TextBoxes in my Form?

Check this:

foreach (Control x in this.Controls)
{
    if (x is TextBox)
    {
        x.Text = "";
    }
}

How do I find a particular value in an array and return its index?

The syntax you have there for your function doesn't make sense (why would the return value have a member called arr?).

To find the index, use std::distance and std::find from the <algorithm> header.

int x = std::distance(arr, std::find(arr, arr + 5, 3));

Or you can make it into a more generic function:

template <typename Iter>
size_t index_of(Iter first, Iter last, typename const std::iterator_traits<Iter>::value_type& x)
{
    size_t i = 0;
    while (first != last && *first != x)
      ++first, ++i;
    return i;
}

Here, I'm returning the length of the sequence if the value is not found (which is consistent with the way the STL algorithms return the last iterator). Depending on your taste, you may wish to use some other form of failure reporting.

In your case, you would use it like so:

size_t x = index_of(arr, arr + 5, 3);

How can I use the python HTMLParser library to extract data from a specific div tag?

Little correction at Line 3

HTMLParser.HTMLParser.__init__(self)

it should be

HTMLParser.__init__(self)

The following worked for me though

import urllib2 

from HTMLParser import HTMLParser  

class MyHTMLParser(HTMLParser):

  def __init__(self):
    HTMLParser.__init__(self)
    self.recording = 0 
    self.data = []
  def handle_starttag(self, tag, attrs):
    if tag == 'required_tag':
      for name, value in attrs:
        if name == 'somename' and value == 'somevale':
          print name, value
          print "Encountered the beginning of a %s tag" % tag 
          self.recording = 1 


  def handle_endtag(self, tag):
    if tag == 'required_tag':
      self.recording -=1 
      print "Encountered the end of a %s tag" % tag 

  def handle_data(self, data):
    if self.recording:
      self.data.append(data)

 p = MyHTMLParser()
 f = urllib2.urlopen('http://www.someurl.com')
 html = f.read()
 p.feed(html)
 print p.data
 p.close()

`

What is the difference between "::" "." and "->" in c++

-> is for pointers to a class instance

. is for class instances

:: is for classnames - for example when using a static member

How do I deploy Node.js applications as a single executable file?

You could create a git repo and setup a link to the node git repo as a dependency. Then any user who clones the repo could also install node.

#git submodule [--quiet] add [-b branch] [-f|--force]
git submodule add /var/Node-repo.git common

You could easily package a script up to automatically clone the git repo you have hosted somewhere and "install" from one that one script file.

#!/bin/sh
#clone git repo
git clone your-repo.git

What is the size of a boolean variable in Java?

The actual information represented by a boolean value in Java is one bit: 1 for true, 0 for false. However, the actual size of a boolean variable in memory is not precisely defined by the Java specification. See Primitive Data Types in Java.

The boolean data type has only two possible values: true and false. Use this data type for simple flags that track true/false conditions. This data type represents one bit of information, but its "size" isn't something that's precisely defined.

Java: Date from unix timestamp

For kotlin

fun unixToDate(timeStamp: Long) : String? {
    val time = java.util.Date(timeStamp as Long * 1000)
    val sdf = SimpleDateFormat("yyyy-MM-dd")
    return sdf.format(time)

}

Window.open and pass parameters by post method

Since you wanted the whole form inside the javascript, instead of writing it in tags, you can do this:

let windowName = 'w_' + Date.now() + Math.floor(Math.random() * 100000).toString();
var form = document.createElement("form");
form.setAttribute("method", "post");
form.setAttribute("action", "openData.do");

form.setAttribute("target", windowName);

var hiddenField = document.createElement("input"); 
hiddenField.setAttribute("type", "hidden");
hiddenField.setAttribute("name", "message");
hiddenField.setAttribute("value", "val");
form.appendChild(hiddenField);
document.body.appendChild(form);

window.open('', windowName);

form.submit();

MySQL count occurrences greater than 2

SELECT word, COUNT(*) FROM words GROUP by word HAVING COUNT(*) > 1

MySQL Error 1264: out of range value for column

The value 3172978990 is greater than 2147483647 – the maximum value for INT – hence the error. MySQL integer types and their ranges are listed here.

Also note that the (10) in INT(10) does not define the "size" of an integer. It specifies the display width of the column. This information is advisory only.

To fix the error, change your datatype to VARCHAR. Phone and Fax numbers should be stored as strings. See this discussion.

Automatic HTTPS connection/redirect with node.js/express

The idea is to check if the incoming request is made with https, if so simply don't redirect it again to https but continue as usual. Else, if it is http, redirect it with appending https.

app.use (function (req, res, next) {
  if (req.secure) {
          next();
  } else {
          res.redirect('https://' + req.headers.host + req.url);
  }
});

Quick way to list all files in Amazon S3 bucket?

Update 15-02-2019:

This command will give you a list of all buckets in AWS S3:

aws s3 ls

This command will give you a list of all top-level objects inside an AWS S3 bucket:

aws s3 ls bucket-name

This command will give you a list of ALL objects inside an AWS S3 bucket:

aws s3 ls bucket-name --recursive

This command will place a list of ALL inside an AWS S3 bucket... inside a text file in your current directory:

aws s3 ls bucket-name --recursive | cat >> file-name.txt

mysqldump data only

 >> man -k  mysqldump [enter in the terminal]

you will find the below explanation

--no-create-info, -t

Do not write CREATE TABLE statements that re-create each dumped table. Note This option does not not exclude statements creating log file groups or tablespaces from mysqldump output; however, you can use the --no-tablespaces option for this purpose.

--no-data, -d

Do not write any table row information (that is, do not dump table contents). This is useful if you want to dump only the CREATE TABLE statement for the table (for example, to create an empty copy of the table by loading the dump file).

# To export to file (data only)
mysqldump -t -u [user] -p[pass] -t mydb > mydb_data.sql

# To export to file (structure only)
mysqldump -d -u [user] -p[pass] -d mydb > mydb_structure.sql

Run an exe from C# code

Example:

Process process = Process.Start(@"Data\myApp.exe");
int id = process.Id;
Process tempProc = Process.GetProcessById(id);
this.Visible = false;
tempProc.WaitForExit();
this.Visible = true;

Make anchor link go some pixels above where it's linked to

To link to an element, and then 'position' that element an arbitrary distance from the top of the page, using pure CSS, you'd have to use padding-top, that way the element is still positioned at the top of the window, but it appears, visibly, to be positioned some distance from the top of the view-port, for example:

<a href="#link1">Link one</a>
<a href="#link2">Link two</a>

<div id="link1">
    The first.
</div>

<div id="link2">
    The second.
</div>

CSS:

div {
    /* just to force height, and window-scrolling to get to the elements.
       Irrelevant to the demo, really */
    margin-top: 1000px;
    height: 1000px;
}

#link2 {
    /* places the contents of the element 100px from the top of the view-port */
    padding-top: 100px;
}

JS Fiddle demo.

To use a plain JavaScript approach:

function addMargin() {
    window.scrollTo(0, window.pageYOffset - 100);
}

window.addEventListener('hashchange', addMargin);

JS Fiddle demo.

What's the difference between all the Selection Segues?

For clarity, I'd like to illustrate @Joey's answer above with these gifs :

Show

enter image description here

Show Detail

enter image description here

Present Modally

enter image description here

Present As Popover

enter image description here

How to remove the querystring and get only the url?

Most Easiest Way

$url = 'https://www.youtube.com/embed/ROipDjNYK4k?rel=0&autoplay=1';
$url_arr = parse_url($url);
$query = $url_arr['query'];
print $url = str_replace(array($query,'?'), '', $url);

//output
https://www.youtube.com/embed/ROipDjNYK4k

Getting the difference between two repositories

Your best bet is to have both repos on your local machine and use the linux diff command with the two directories as parameters:

diff -r repo-A repo-B

fork() child and parent processes

It is printing twice because you are calling printf twice, once in the execution of your program and once in the fork. Try taking your fork() out of the printf call.