#Event triggers | Programs & Examples on Event triggers

How to get Month Name from Calendar?

DateFormat date =  new SimpleDateFormat("dd/MMM/yyyy");
Date date1 = new Date();
System.out.println(date.format(date1));

TensorFlow ValueError: Cannot feed value of shape (64, 64, 3) for Tensor u'Placeholder:0', which has shape '(?, 64, 64, 3)'

image has a shape of (64,64,3).

Your input placeholder _x have a shape of (?, 64,64,3).

The problem is that you're feeding the placeholder with a value of a different shape.

You have to feed it with a value of (1, 64, 64, 3) = a batch of 1 image.

Just reshape your image value to a batch with size one.

image = array(img).reshape(1, 64,64,3)

P.S: the fact that the input placeholder accepts a batch of images, means that you can run predicions for a batch of images in parallel. You can try to read more than 1 image (N images) and than build a batch of N image, using a tensor with shape (N, 64,64,3)

What does the symbol \0 mean in a string-literal?

sizeof str is 7 - five bytes for the "Hello" text, plus the explicit NUL terminator, plus the implicit NUL terminator.

strlen(str) is 5 - the five "Hello" bytes only.

The key here is that the implicit nul terminator is always added - even if the string literal just happens to end with \0. Of course, strlen just stops at the first \0 - it can't tell the difference.

There is one exception to the implicit NUL terminator rule - if you explicitly specify the array size, the string will be truncated to fit:

char str[6] = "Hello\0"; // strlen(str) = 5, sizeof(str) = 6 (with one NUL)
char str[7] = "Hello\0"; // strlen(str) = 5, sizeof(str) = 7 (with two NULs)
char str[8] = "Hello\0"; // strlen(str) = 5, sizeof(str) = 8 (with three NULs per C99 6.7.8.21)

This is, however, rarely useful, and prone to miscalculating the string length and ending up with an unterminated string. It is also forbidden in C++.

How to set image in circle in swift

This way is the least expensive way and always keeps your image view rounded:

class RoundedImageView: UIImageView {

    override init(frame: CGRect) {
        super.init(frame: frame)

        clipsToBounds = true
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        clipsToBounds = true
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        assert(bounds.height == bounds.width, "The aspect ratio isn't 1/1. You can never round this image view!")

        layer.cornerRadius = bounds.height / 2
    }
}

The other answers are telling you to make views rounded based on frame calculations set in a UIViewControllers viewDidLoad() method. This isn't correct, since it isn't sure what the final frame will be.

Cache busting via params

Hope this should help you to inject external JS file

<script type="text/javascript"> 
var cachebuster = Math.round(new Date().getTime() / 1000); 
document.write('<scr'+'ipt type="text/javascript" src="external.js?cb=' +cachebuster+'"></scr' + 'ipt>');
</script>

Source - Cachebuster code in JavaScript

How do I round a double to two decimal places in Java?

Math.round is one answer,

public class Util {
 public static Double formatDouble(Double valueToFormat) {
    long rounded = Math.round(valueToFormat*100);
    return rounded/100.0;
 }
}

Test in Spock,Groovy

void "test double format"(){
    given:
         Double performance = 0.6666666666666666
    when:
        Double formattedPerformance = Util.formatDouble(performance)
        println "######################## formatted ######################### => ${formattedPerformance}"
    then:
        0.67 == formattedPerformance

}

MySQL Like multiple values

You can also use REGEXP's synonym RLIKE as well.

For example:

SELECT *
FROM TABLE_NAME
WHERE COLNAME RLIKE 'REGEX1|REGEX2|REGEX3'

How can I clear the content of a file?

Use FileMode.Truncate everytime you create the file. Also place the File.Create inside a try catch.

How can I check if given int exists in array?

I think you are looking for std::any_of, which will return a true/false answer to detect if an element is in a container (array, vector, deque, etc.)

int val = SOME_VALUE; // this is the value you are searching for
bool exists = std::any_of(std::begin(myArray), std::end(myArray), [&](int i)
{
    return i == val;
});

If you want to know where the element is, std::find will return an iterator to the first element matching whatever criteria you provide (or a predicate you give it).

int val = SOME_VALUE;
int* pVal = std::find(std::begin(myArray), std::end(myArray), val);
if (pVal == std::end(myArray))
{
    // not found
}
else
{
    // found
}

Read tab-separated file line into array

You're very close:

while IFS=$'\t' read -r -a myArray
do
 echo "${myArray[0]}"
 echo "${myArray[1]}"
 echo "${myArray[2]}"
done < myfile

(The -r tells read that \ isn't special in the input data; the -a myArray tells it to split the input-line into words and store the results in myArray; and the IFS=$'\t' tells it to use only tabs to split words, instead of the regular Bash default of also allowing spaces to split words as well. Note that this approach will treat one or more tabs as the delimiter, so if any field is blank, later fields will be "shifted" into earlier positions in the array. Is that O.K.?)

Didn't Java once have a Pair class?

It does seem odd. I found this thread, also thinking I'd seen one in the past, but couldn't find it in Javadoc.

I can see the Java developers' point about using specialised classes, and that the presence of a generic Pair class could cause developers to be lazy (perish the thought!)

However, in my experience, there are undoubtedly times when the thing you're modelling really is just a pair of things and coming up with a meaningful name for the relationship between the two halves of the pair, is actually more painful than just getting on with it. So instead, we're left to create a 'bespoke' class of practically boiler-plate code - probably called 'Pair'.

This could be a slippery slope, but a Pair and a Triplet class would cover a very large proportion of the use-cases.

Find where python is installed (if it isn't default dir)

If you are using wiindows OS (I am using windows 10 ) just type

where python

in command prompt ( cmd )

It will show you the directory where you have installed .

json_decode to array

I hope this will help you

$json_ps = '{"courseList":[  
            {"course":"1", "course_data1":"Computer Systems(Networks)"},  
            {"course":"2", "course_data2":"Audio and Music Technology"},  
            {"course":"3", "course_data3":"MBA Digital Marketing"}  
        ]}';

Use Json decode function

$json_pss = json_decode($json_ps, true);

Looping over JSON array in php

foreach($json_pss['courseList'] as $pss_json)
{

    echo '<br>' .$course_data1 = $pss_json['course_data1']; exit; 

}

Result: Computer Systems(Networks)

Sort dataGridView columns in C# ? (Windows Form)

You can control the data returned from SQL database by ordering the data returned:

orderby [Name]

If you execute the SQL query from your application, order the data returned. For example, make a function that calls the procedure or executes the SQL and give it a parameter that gets the orderby criteria. Because if you ordered the data returned from database it will consume time but order it since it's executed as you say that you want it to be ordered not from the UI you want it to be ordered in the run time so order it when executing the SQL query.

Programmatically change UITextField Keyboard type

Swift 4

If you are trying to change your keyboard type when a condition is met, follow this. For example: If we want to change the keyboard type from Default to Number Pad when the count of the textfield is 4 or 5, then do this:

textField.addTarget(self, action: #selector(handleTextChange), for: .editingChanged)

@objc func handleTextChange(_ textChange: UITextField) {
 if textField.text?.count == 4 || textField.text?.count == 5 {
   textField.keyboardType = .numberPad
   textField.reloadInputViews() // need to reload the input view for this to work
 } else {
   textField.keyboardType = .default
   textField.reloadInputViews()
 }

Multi-key dictionary in c#?

Here's another example using the Tuple class with the Dictionary.

        // Setup Dictionary
    Dictionary<Tuple<string, string>, string> testDictionary = new Dictionary<Tuple<string, string>, string>
    {
        {new Tuple<string, string>("key1","key2"), "value1"},
        {new Tuple<string, string>("key1","key3"), "value2"},
        {new Tuple<string, string>("key2","key3"), "value3"}
    };
    //Query Dictionary
    public string FindValue(string stuff1, string stuff2)
    {
        return testDictionary[Tuple.Create(stuff1, stuff2)];
    }

How to return XML in ASP.NET?

Ideally you would use an ashx to send XML although I do allow code in an ASPX to intercept normal execution.

Response.Clear()

I don't use this if you not sure you've dumped anything in the response already the go find it and get rid of it.

Response.ContentType = "text/xml"

Definitely, a common client will not accept the content as XML without this content type present.

 Response.Charset = "UTF-8";

Let the response class handle building the content type header properly. Use UTF-8 unless you have a really, really good reason not to.

Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetAllowResponseInBrowserHistory(true);

If you don't send cache headers some browsers (namely IE) will cache the response, subsequent requests will not necessarily come to the server. You also need to AllowResponseInBrowser if you want this to work over HTTPS (due to yet another bug in IE).

To send content of an XmlDocument simply use:

~~dom.Save(Response.OutputStream);~~

dom.Save(Response.Output);

Just be sure the encodings match, (another good reason to use UTF-8).

The XmlDocument object will automatically adjust its embedded encoding="..." encoding to that of the Response (e.g. UTF-8)

Response.End()

If you really have to in an ASPX but its a bit drastic, in an ASHX don't do it.

How to properly use unit-testing's assertRaises() with NoneType objects?

Complete snippet would look like the following. It expands @mouad's answer to asserting on error's message (or generally str representation of its args), which may be useful.

from unittest import TestCase


class TestNoneTypeError(TestCase):

  def setUp(self): 
    self.testListNone = None

  def testListSlicing(self):
    with self.assertRaises(TypeError) as ctx:
        self.testListNone[:1]
    self.assertEqual("'NoneType' object is not subscriptable", str(ctx.exception))

How to send password using sftp batch file

If you are generating a heap of commands to be run, then call that script from a terminal, you can try the following.

sftp login@host < /path/to/command/list

You will then be asked to enter your password (as per normal) however all the commands in the script run after that.

This is clearly not a completely automated option that can be used in a cron job, but it can be used from a terminal.

adb uninstall failed

Yes, mobile device management would bring its own problems, but i bet 'Failure' is a dos2unix problem. On my Linux machines, adb is appending a DOS newline which causes 'Failure' because uninstall thinks the CR character is part of the package name. Also remove '-1.apk' from the end of the package-1.apk filename.

adb root
adb shell
pm list packages
pm uninstall com.android.chrome

In my case, i have a phone that is in permanent 'Safe mode' so only apps under /system/app/ have a chance of running. So i install them to get the .apk files copied off, then uninstall in bulk and copy to /system/app/, wipe the /cache and reboot. Now i have more apps running even though in safe mdoe.

# adb root
# pm list packages -3 > /root/bulkuninstall.txt
# vi /root/bulkuninstall.txt  and check ^M characters at end of each line.   
   If ^M, then must run dos2unix /root/bulkuninstall.txt.  
   Remove '-1.apk' using vi search and replace:  
        :%s/-1\.apk//g 
   Or sed...

# cp /data/app/* /storage/sdcard1/APKs/
# for f in `cat /root/bulkuninstall.txt`; do echo $f; pm uninstall $f; done;
# 
# echo Now remount system and copy the APK files to /system/app/
# mount | grep system
# mount -o remount,rw /dev/block/(use block device from previous step)  /system 
# cp /storage/sdcard1/APKs/* /system/app/
# reboot

wipe cache power on.

How do you get the length of a list in the JSF expression language?

Yes, since some genius in the Java API creation committee decided that, even though certain classes have size() members or length attributes, they won't implement getSize() or getLength() which JSF and most other standards require, you can't do what you want.

There's a couple ways to do this.

One: add a function to your Bean that returns the length:

In class MyBean:
public int getSomelistLength() { return this.somelist.length; }

In your JSF page:
#{MyBean.somelistLength}

Two: If you're using Facelets (Oh, God, why aren't you using Facelets!), you can add the fn namespace and use the length function

In JSF page:
#{ fn:length(MyBean.somelist) }

Get second child using jQuery

grab the second child:

$(t).children().eq(1);

or, grab the second child <td>:

$(t).children('td').eq(1);

See documentation for children and eq.

Why does this AttributeError in python occur?

This happens because the scipy module doesn't have any attribute named sparse. That attribute only gets defined when you import scipy.sparse.

Submodules don't automatically get imported when you just import scipy; you need to import them explicitly. The same holds for most packages, although a package can choose to import its own submodules if it wants to. (For example, if scipy/__init__.py included a statement import scipy.sparse, then the sparse submodule would be imported whenever you import scipy.)

Get encoding of a file in Windows

The only way that I have found to do this is VIM or Notepad++.

What is the use of adding a null key or value to a HashMap in Java?

A null key can also be helpful when the map stores data for UI selections where the map key represents a bean field.

A corresponding null field value would for example be represented as "(please select)" in the UI selection.

How do I get git to default to ssh and not https for new repositories

GitHub

git config --global url.ssh://[email protected]/.insteadOf https://github.com/

BitBucket

git config --global url.ssh://[email protected]/.insteadOf https://bitbucket.org/

That tells git to always use SSH instead of HTTPS when connecting to GitHub/BitBucket, so you'll authenticate by certificate by default, instead of being prompted for a password.

Python - OpenCV - imread - Displaying Image

In openCV whenever you try to display an oversized image or image bigger than your display resolution you get the cropped display. It's a default behaviour.
In order to view the image in the window of your choice openCV encourages to use named window. Please refer to namedWindow documentation

The function namedWindow creates a window that can be used as a placeholder for images and trackbars. Created windows are referred to by their names.

cv.namedWindow(name, flags=CV_WINDOW_AUTOSIZE) where each window is related to image container by the name arg, make sure to use same name

eg:

import cv2
frame = cv2.imread('1.jpg')
cv2.namedWindow("Display 1")
cv2.resizeWindow("Display 1", 300, 300)
cv2.imshow("Display 1", frame)

How do I enumerate through a JObject?

JObjects can be enumerated via JProperty objects by casting it to a JToken:

foreach (JProperty x in (JToken)obj) { // if 'obj' is a JObject
    string name = x.Name;
    JToken value = x.Value;
}

If you have a nested JObject inside of another JObject, you don't need to cast because the accessor will return a JToken:

foreach (JProperty x in obj["otherObject"]) { // Where 'obj' and 'obj["otherObject"]' are both JObjects
    string name = x.Name;
    JToken value = x.Value;
}

How to make an Android device vibrate? with different frequency?

You can Vibrate the Device and its work

   Vibrator v = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
           v.vibrate(100);

Permission is necessary but not on runtime permission required

<uses-permission android:name="android.permission.VIBRATE"/>

Azure SQL Database "DTU percentage" metric

From this document, this DTU percent is determined by this query:

SELECT end_time,   
  (SELECT Max(v)    
   FROM (VALUES (avg_cpu_percent), (avg_data_io_percent), 
(avg_log_write_percent)) AS    
   value(v)) AS [avg_DTU_percent]   
FROM sys.dm_db_resource_stats;

looks like the max of avg_cpu_percent, avg_data_io_percent and avg_log_write_percent

Reference:

https://docs.microsoft.com/en-us/sql/relational-databases/system-dynamic-management-views/sys-dm-db-resource-stats-azure-sql-database

SQL Server: how to add new identity column and populate column with ids?

The program can't start because cygwin1.dll is missing... in Eclipse CDT

This error message means that Windows isn't able to find "cygwin1.dll". The Programs that the Cygwin gcc create depend on this DLL. The file is part of cygwin , so most likely it's located in C:\cygwin\bin. To fix the problem all you have to do is add C:\cygwin\bin (or the location where cygwin1.dll can be found) to your system path. Alternatively you can copy cygwin1.dll into your Windows directory.

There is a nice tool called DependencyWalker that you can download from http://www.dependencywalker.com . You can use it to check dependencies of executables, so if you inspect your generated program it tells you which dependencies are missing and which are resolved.

Java parsing XML document gives "Content not allowed in prolog." error

Please check the xml file whether it has any junk character like this ?.If exists,please use the following syntax to remove that.

String XString = writer.toString();
XString = XString.replaceAll("[^\\x20-\\x7e]", "");

How can labels/legends be added for all chart types in chart.js (chartjs.org)?

Strangely, I didn't find anything about legends and labels in the Chart.js documentation. It seems like you can't do it with chart.js alone.

I used https://github.com/bebraw/Chart.js.legend which is extremely light, to generate the legends.

Unable to read data from the transport connection : An existing connection was forcibly closed by the remote host

For some reason, the connection to the server was lost. It could be that the server explicitly closed the connection, or a bug on the server caused it to be closed unexpectedly. Or something between the client and the server (a switch or router) dropped the connection.

It might be server code that caused the problem, and it might not be. If you have access to the server code, you can put some debugging in there to tell you when client connections are closed. That might give you some indication of when and why connections are being dropped.

On the client, you have to write your code to take into account the possibility of the server failing at any time. That's just the way it is: network connections are inherently unreliable.

Windows batch: formatted date into variable

Check this one..

for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "YY=%dt:~2,2%" & set "YYYY=%dt:~0,4%" & set "MM=%dt:~4,2%" & set "DD=%dt:~6,2%"
set "HH=%dt:~8,2%" & set "Min=%dt:~10,2%" & set "Sec=%dt:~12,2%" & set "MS=%dt:~15,3%"
set "datestamp=%YYYY%%MM%%DD%" & set "timestamp=%HH%%Min%%Sec%" & set "fullstamp=%YYYY%-%MM%-%DD%_%HH%-%Min%-%Sec%-%MS%"
echo datestamp: "%datestamp%"
echo timestamp: "%timestamp%"
echo fullstamp: "%fullstamp%"
pause

jQuery or JavaScript auto click

First i tried with this sample code:

$(document).ready(function(){ 
     $('#upload-file').click(); 
});

It didn't work for me. Then after, tried with this

$(document).ready(function(){ 
     $('#upload-file')[0].click(); 
});

No change. At last, tried with this

$(document).ready(function(){ 
     $('#upload-file')[0].click(function(){
     }); 
});

Solved my problem. Helpful for anyone.

Searching if value exists in a list of objects using Linq

zvolkov's answer is the perfect one to find out if there is such a customer. If you need to use the customer afterwards, you can do:

Customer customer = list.FirstOrDefault(cus => cus.FirstName == "John");
if (customer != null)
{
    // Use customer
}

I know this isn't what you were asking, but I thought I'd pre-empt a follow-on question :) (Of course, this only finds the first such customer... to find all of them, just use a normal where clause.)

jQuery - Call ajax every 10 seconds

Are you going to want to do a setInterval()?

setInterval(function(){get_fb();}, 10000);

Or:

setInterval(get_fb, 10000);

Or, if you want it to run only after successfully completing the call, you can set it up in your .ajax().success() callback:

function get_fb(){
    var feedback = $.ajax({
        type: "POST",
        url: "feedback.php",
        async: false
    }).success(function(){
        setTimeout(function(){get_fb();}, 10000);
    }).responseText;

    $('div.feedback-box').html(feedback);
}

Or use .ajax().complete() if you want it to run regardless of result:

function get_fb(){
    var feedback = $.ajax({
        type: "POST",
        url: "feedback.php",
        async: false
    }).complete(function(){
        setTimeout(function(){get_fb();}, 10000);
    }).responseText;

    $('div.feedback-box').html(feedback);
}

Here is a demonstration of the two. Note, the success works only once because jsfiddle is returning a 404 error on the ajax call.

http://jsfiddle.net/YXMPn/

#define macro for debug printing in C?

For a portable (ISO C90) implementation, you could use double parentheses, like this;

#include <stdio.h>
#include <stdarg.h>

#ifndef NDEBUG
#  define debug_print(msg) stderr_printf msg
#else
#  define debug_print(msg) (void)0
#endif

void
stderr_printf(const char *fmt, ...)
{
  va_list ap;
  va_start(ap, fmt);
  vfprintf(stderr, fmt, ap);
  va_end(ap);
}

int
main(int argc, char *argv[])
{
  debug_print(("argv[0] is %s, argc is %d\n", argv[0], argc));
  return 0;
}

or (hackish, wouldn't recommend it)

#include <stdio.h>

#define _ ,
#ifndef NDEBUG
#  define debug_print(msg) fprintf(stderr, msg)
#else
#  define debug_print(msg) (void)0
#endif

int
main(int argc, char *argv[])
{
  debug_print("argv[0] is %s, argc is %d"_ argv[0] _ argc);
  return 0;
}

How to build query string with Javascript

You don't actually need a form to do this with Prototype. Just use Object.toQueryString function:

Object.toQueryString({ action: 'ship', order_id: 123, fees: ['f1', 'f2'], 'label': 'a demo' })

// -> 'action=ship&order_id=123&fees=f1&fees=f2&label=a%20demo'

Flutter: Setting the height of the AppBar

At the time of writing this, I was not aware of PreferredSize. Cinn's answer is better to achieve this.

You can create your own custom widget with a custom height:

import "package:flutter/material.dart";

class Page extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Column(children : <Widget>[new CustomAppBar("Custom App Bar"), new Container()],);
  }
}


class CustomAppBar extends StatelessWidget {

  final String title;
  final double barHeight = 50.0; // change this for different heights 

  CustomAppBar(this.title);

  @override
  Widget build(BuildContext context) {
    final double statusbarHeight = MediaQuery
        .of(context)
        .padding
        .top;

    return new Container(
      padding: new EdgeInsets.only(top: statusbarHeight),
      height: statusbarHeight + barHeight,
      child: new Center(
        child: new Text(
          title,
          style: new TextStyle(fontSize: 20.0, fontWeight: FontWeight.bold),
        ),
      ),
    );
  }
}

Remove credentials from Git

If you are authenticated using your key pair, you can deleting or moving your private key, or stopping the key agent and trying.

DISABLE the Horizontal Scroll

Koala_dev's answer will work, but in case you are wondering this is the reason why it works:

.
q.html, body {              <--applying this css block to everything in the
                             html code.

q.max-width: 100%;          <--all items created must not exceed 100% of the 
                             users screen size. (no items can be off the page 
                             requiring scroll)

q.overflow-x: hidden;       <--anything that occurs off the X axis of the 
                             page is hidden, so that you wont see it going 
                             off the page.

How to get the Full file path from URI

We all agree that SAF is horribly designed and slow, but Google has been pushing us to it. Given that getExternalStorageDirectory() had been long deprecated, and possibly won't work since 11, I would rather not using these solutions, as it is one update away from crashing...

Plotting categorical data with pandas and matplotlib

You could also use countplot from seaborn. This package builds on pandas to create a high level plotting interface. It gives you good styling and correct axis labels for free.

import pandas as pd
import seaborn as sns
sns.set()

df = pd.DataFrame({'colour': ['red', 'blue', 'green', 'red', 'red', 'yellow', 'blue'],
                   'direction': ['up', 'up', 'down', 'left', 'right', 'down', 'down']})
sns.countplot(df['colour'], color='gray')

It also supports coloring the bars in the right color with a little trick

sns.countplot(df['colour'],
              palette={color: color for color in df['colour'].unique()})

Color picker utility (color pipette) in Ubuntu

You can install the package gcolor2 for this:

sudo apt-get install gcolor2

Then:

Applications -> Graphics -> GColor2

Extract file basename without path and extension in bash

If you want to play nice with Windows file paths (under Cygwin) you can also try this:

fname=${fullfile##*[/|\\]}

This will account for backslash separators when using BaSH on Windows.

Throughput and bandwidth difference?

The bandwidth of a link is the theoretical maximum amount of data that could be sent over that channel without regard to practical considerations. For example, you could pump 10^9 bits per second down a Gigabit Ethernet link over a Cat-6e or fiber optic cable. Unfortunately this would be a completely unformatted stream of bits.

To make it actually useful there's a start of frame sequence which precedes any actual data bits, a frame check sequence at the end for error detection and an idle period between transmitted frames. All of those occupy what is referred to as "bit times" meaning the amount of time it takes to transmit one bit over the line. This is all necessary overhead, but is subtracted from the total bandwidth of the link.

And this is only for the lowest level protocol which is stuffing raw data out onto the wire. Once you start adding in the MAC addresses, an IP header and a TCP or UDP header, then you've added even more overhead.

Check out http://en.wikipedia.org/wiki/Ethernet_frame. Similar problems exist for other transmission media.

Has an event handler already been added?

EventHandler.GetInvocationList().Length > 0

Proper way to get page content

$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array( 'prev_text' >' Previous','post_type' => 'page', 'posts_per_page' => 5, 'paged' => $paged );
$wp_query = new WP_Query($args);
while ( have_posts() ) : the_post();
//get all pages 
the_ID();
the_title();

//if you want specific page of content then write
if(get_the_ID=='11')//make sure to use get_the_ID instead the_ID
{
echo get_the_ID();
the_title();
the_content();
}

endwhile;

//if you want specific page of content then write in loop

  if(get_the_ID=='11')//make sure to use get_the_ID instead the_ID
    {
    echo get_the_ID();
    the_title();
    the_content();
    }

Error: Failed to lookup view in Express

Just noticed that I had named my file ' index.html' instead for 'index.html' with a leading space. That was why it could not find it.

When should an IllegalArgumentException be thrown?

Any API should check the validity of the every parameter of any public method before executing it:

void setPercentage(int pct, AnObject object) {
    if( pct < 0 || pct > 100) {
        throw new IllegalArgumentException("pct has an invalid value");
    }
    if (object == null) {
        throw new IllegalArgumentException("object is null");
    }
}

They represent 99.9% of the times errors in the application because it is asking for impossible operations so in the end they are bugs that should crash the application (so it is a non recoverable error).

In this case and following the approach of fail fast you should let the application finish to avoid corrupting the application state.

Setting the number of map tasks and reduce tasks

In the newer version of Hadoop, there are much more granular mapreduce.job.running.map.limit and mapreduce.job.running.reduce.limit which allows you to set the mapper and reducer count irrespective of hdfs file split size. This is helpful if you are under constraint to not take up large resources in the cluster.

JIRA

AngularJS : When to use service instead of factory

Explanation

You got different things here:

First:

If you use a service you will get the instance of a function ("this" keyword).
If you use a factory you will get the value that is returned by invoking the function reference (the return statement in factory).

ref: angular.service vs angular.factory

Second:

Keep in mind all providers in AngularJS (value, constant, services, factories) are singletons!

Third:

Using one or the other (service or factory) is about code style. But, the common way in AngularJS is to use factory.

Why ?

Because "The factory method is the most common way of getting objects into AngularJS dependency injection system. It is very flexible and can contain sophisticated creation logic. Since factories are regular functions, we can also take advantage of a new lexical scope to simulate "private" variables. This is very useful as we can hide implementation details of a given service."

(ref: http://www.amazon.com/Mastering-Web-Application-Development-AngularJS/dp/1782161821).

Usage

Service : Could be useful for sharing utility functions that are useful to invoke by simply appending () to the injected function reference. Could also be run with injectedArg.call(this) or similar.

Factory : Could be useful for returning a ‘class’ function that can then be new`ed to create instances.

So, use a factory when you have complex logic in your service and you don't want expose this complexity.

In other cases if you want to return an instance of a service just use service.

But you'll see with time that you'll use factory in 80% of cases I think.

For more details: http://blog.manishchhabra.com/2013/09/angularjs-service-vs-factory-with-example/

UPDATE :

Excellent post here : http://iffycan.blogspot.com.ar/2013/05/angular-service-or-factory.html

"If you want your function to be called like a normal function, use factory. If you want your function to be instantiated with the new operator, use service. If you don't know the difference, use factory."

UPDATE :

AngularJS team does his work and give an explanation: http://docs.angularjs.org/guide/providers

And from this page :

"Factory and Service are the most commonly used recipes. The only difference between them is that Service recipe works better for objects of custom type, while Factory can produce JavaScript primitives and functions."

Can I install/update WordPress plugins without providing FTP access?

As stated before none of the perm fixes work anymore. You need to change the perms accordingly AND put the following in your wp-config.php:

define('FS_METHOD', 'direct');

Servlet for serving static content

try this

<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.js</url-pattern>
    <url-pattern>*.css</url-pattern>
    <url-pattern>*.ico</url-pattern>
    <url-pattern>*.png</url-pattern>
    <url-pattern>*.jpg</url-pattern>
    <url-pattern>*.htc</url-pattern>
    <url-pattern>*.gif</url-pattern>
</servlet-mapping>

Edit: This is only valid for the servlet 2.5 spec and up.

How to get the index of an item in a list in a single step?

Here's a copy/paste-able extension method for IEnumerable

public static class EnumerableExtensions
{
    /// <summary>
    /// Searches for an element that matches the conditions defined by the specified predicate,
    /// and returns the zero-based index of the first occurrence within the entire <see cref="IEnumerable{T}"/>.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="list">The list.</param>
    /// <param name="predicate">The predicate.</param>
    /// <returns>
    /// The zero-based index of the first occurrence of an element that matches the conditions defined by <paramref name="predicate"/>, if found; otherwise it'll throw.
    /// </returns>
    public static int FindIndex<T>(this IEnumerable<T> list, Func<T, bool> predicate)
    {
        var idx = list.Select((value, index) => new {value, index}).Where(x => predicate(x.value)).Select(x => x.index).First();
        return idx;
    }
}

Enjoy.

How do I create a file AND any folders, if the folders don't exist?

You want Directory.CreateDirectory()

Here is a class I use (converted to C#) that if you pass it a source directory and a destination it will copy all of the files and sub-folders of that directory to your destination:

using System.IO;

public class copyTemplateFiles
{


public static bool Copy(string Source, string destination)
{

    try {

        string[] Files = null;

        if (destination[destination.Length - 1] != Path.DirectorySeparatorChar) {
            destination += Path.DirectorySeparatorChar;
        }

        if (!Directory.Exists(destination)) {
            Directory.CreateDirectory(destination);
        }

        Files = Directory.GetFileSystemEntries(Source);
        foreach (string Element in Files) {
            // Sub directories
            if (Directory.Exists(Element)) {
                copyDirectory(Element, destination + Path.GetFileName(Element));
            } else {
                // Files in directory
                File.Copy(Element, destination + Path.GetFileName(Element), true);
            }
        }

    } catch (Exception ex) {
        return false;
    }

    return true;

}



private static void copyDirectory(string Source, string destination)
{
    string[] Files = null;

    if (destination[destination.Length - 1] != Path.DirectorySeparatorChar) {
        destination += Path.DirectorySeparatorChar;
    }

    if (!Directory.Exists(destination)) {
        Directory.CreateDirectory(destination);
    }

    Files = Directory.GetFileSystemEntries(Source);
    foreach (string Element in Files) {
        // Sub directories
        if (Directory.Exists(Element)) {
            copyDirectory(Element, destination + Path.GetFileName(Element));
        } else {
            // Files in directory
            File.Copy(Element, destination + Path.GetFileName(Element), true);
        }
    }

}

}

Restore DB — Error RESTORE HEADERONLY is terminating abnormally.

This type of error will come when you try to upload backup data from a higher version to lower version. Like you have backup of SQL server 2008 and you trying to upload data into SQL server 2005 then you will get this kind of error. Please try to upload in a higher version.

How do I install pip on macOS or OS X?

Download python setup tools from the below website:

https://pypi.python.org/pypi/setuptools

Use the tar file.

Once you download, go to the downloaded folder and run

python setup.py install

Once you do that,you will have easy_install.

Use the below then to install pip:

sudo easy_install pip

How to use dashes in HTML-5 data-* attributes in ASP.NET MVC

I do not like use pure "a" tag, too much typing. So I come with solution. In view it look

<%: Html.ActionLink(node.Name, "Show", "Browse", 
                    Dic.Route("id", node.Id), Dic.New("data-nodeId", node.Id)) %>

Implementation of Dic class

public static class Dic
{
    public static Dictionary<string, object> New(params object[] attrs)
    {
        var res = new Dictionary<string, object>();
        for (var i = 0; i < attrs.Length; i = i + 2)
            res.Add(attrs[i].ToString(), attrs[i + 1]);
        return res;
    }

    public static RouteValueDictionary Route(params object[] attrs)
    {
        return new RouteValueDictionary(Dic.New(attrs));
    }
}

Adding a simple spacer to twitter bootstrap

My approach. Tricky, but works well for me

<p>&nbsp;</p>

CSS Box Shadow - Top and Bottom Only

As Kristian has pointed out, good control over z-values will often solve your problems.

If that does not work you can take a look at CSS Box Shadow Bottom Only on using overflow hidden to hide excess shadow.

I would also have in mind that the box-shadow property can accept a comma-separated list of shadows like this:

box-shadow: 0px 10px 5px #888, 0px -10px 5px #888;

This will give you some control over the "amount" of shadow in each direction.

Have a look at http://www.css3.info/preview/box-shadow/ for more information about box-shadow.

Hope this was what you were looking for!

How to initialize HashSet values by construction?

In Java 8 I would use:

Set<String> set = Stream.of("a", "b").collect(Collectors.toSet());

This gives you a mutable Set pre-initialized with "a" and "b". Note that while in JDK 8 this does return a HashSet, the specification doesn't guarantee it, and this might change in the future. If you specifically want a HashSet, do this instead:

Set<String> set = Stream.of("a", "b")
                        .collect(Collectors.toCollection(HashSet::new));

Response Content type as CSV

Just Use like that

Response.Clear();
Response.ContentType = "application/CSV";
Response.AddHeader("content-disposition", "attachment; filename=\"" + filename + ".csv\"");
Response.Write(t.ToString());
Response.End();

How to test valid UUID/GUID?

regex to the rescue

/^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$/.test('01234567-9ABC-DEF0-1234-56789ABCDEF0');

or with brackets

/^\{?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}??\}?$/

Batch script loop

Here is a template script I will use.

@echo off
goto Loop

:Loop
<EXTRA SCRIPTING HERE!!!!>
goto Loop

exit

What this does is when it starts it turns off echo then after that it runs the "Loop" but in that place it keeps going to "Loop" (I hope this helps.)

Android: android.content.res.Resources$NotFoundException: String resource ID #0x5

Just wanted to point out another reason this error can be thrown is if you defined a string resource for one translation of your app but did not provide a default string resource.

Example of the Issue:

As you can see below, I had a string resource for a Spanish string "get_started". It can still be referenced in code, but if the phone is not in Spanish it will have no resource to load and crash when calling getString().

values-es/strings.xml

<string name="get_started">SIGUIENTE</string>

Reference to resource

textView.setText(getString(R.string.get_started)

Logcat:

06-11 11:46:37.835    7007-7007/? E/AndroidRuntime? FATAL EXCEPTION: main
Process: com.app.test PID: 7007
android.content.res.Resources$NotFoundException: String resource ID #0x7f0700fd
        at android.content.res.Resources.getText(Resources.java:299)
        at android.content.res.Resources.getString(Resources.java:385)
        at com.juvomobileinc.tigousa.ui.signin.SignInFragment$4.onClick(SignInFragment.java:188)
        at android.view.View.performClick(View.java:4780)
        at android.view.View$PerformClick.run(View.java:19866)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Solution to the Issue

Preventing this is quite simple, just make sure that you always have a default string resource in values/strings.xml so that if the phone is in another language it will always have a resource to fall back to.

values/strings.xml

<string name="get_started">Get Started</string>

values-en/strings.xml

<string name="get_started">Get Started</string>

values-es/strings.xml

<string name="get_started">Siguiente</string>

values-de/strings.xml

<string name="get_started">Ioslegen</string>

What are the differences between struct and class in C++?

Quoting The C++ FAQ,

[7.8] What's the difference between the keywords struct and class?

The members and base classes of a struct are public by default, while in class, they default to private. Note: you should make your base classes explicitly public, private, or protected, rather than relying on the defaults.

Struct and class are otherwise functionally equivalent.

OK, enough of that squeaky clean techno talk. Emotionally, most developers make a strong distinction between a class and a struct. A struct simply feels like an open pile of bits with very little in the way of encapsulation or functionality. A class feels like a living and responsible member of society with intelligent services, a strong encapsulation barrier, and a well defined interface. Since that's the connotation most people already have, you should probably use the struct keyword if you have a class that has very few methods and has public data (such things do exist in well designed systems!), but otherwise you should probably use the class keyword.

Prevent HTML5 video from being downloaded (right-click saved)?

You can at least stop the the non-tech savvy people from using the right-click context menu to download your video. You can disable the context menu for any element using the oncontextmenu attribute.

oncontextmenu="return false;"

This works for the body element (whole page) or just a single video using it inside the video tag.

<video oncontextmenu="return false;" controls>...</video>

Change icon on click (toggle)

Instead of overwriting the html every time, just toggle the class.

$('#click_advance').click(function() {
    $('#display_advance').toggle('1000');
    $("i", this).toggleClass("icon-circle-arrow-up icon-circle-arrow-down");
});

how to read a text file using scanner in Java?

This should help you..:

import java.io.*;
import static java.lang.System.*;
/**
* Write a description of class InRead here.
* 
* @author (your name) 
* @version (a version number or a date)
*/
public class InRead
{
public InRead(String Recipe)
{
    find(Recipe);
}
public void find(String Name){
    String newRecipe= Name+".txt";
    try{
        FileReader fr= new FileReader(newRecipe);
        BufferedReader br= new BufferedReader(fr);

        String str;


    while ((str=br.readLine()) != null){
            out.println(str + "\n");
        }
        br.close();

    }catch (IOException e){
        out.println("File Not Found!");
    }
}

}

How to import/include a CSS file using PHP code and not HTML code?

If you want to import a CSS file like that, just give the file itself a .php extension and import it anyway. It will work just fine :)

How do I make Visual Studio pause after executing a console application in debug mode?

It would actually be more effort, but you could just build in VS.Net, run it from the regular command line (cmd.exe), and then attach to the process after it starts running. This is probably not the solution you are looking for however.

How to cast DATETIME as a DATE in mysql?

http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html

http://www.tutorialspoint.com/mysql/mysql-date-time-functions.htm

use Date function directly. Hope it works

Export html table data to Excel using JavaScript / JQuery is not working properly in chrome browser

Regarding to sampopes answer from Jun 6 '14 at 11:59:

I have insert a css style with font-size of 20px to display the excel data greater. In sampopes code the leading <tr> tags are missing, so i first output the headline and than the other tables lines within a loop.

function fnExcelReport()
{
    var tab_text = '<table border="1px" style="font-size:20px" ">';
    var textRange; 
    var j = 0;
    var tab = document.getElementById('DataTableId'); // id of table
    var lines = tab.rows.length;

    // the first headline of the table
    if (lines > 0) {
        tab_text = tab_text + '<tr bgcolor="#DFDFDF">' + tab.rows[0].innerHTML + '</tr>';
    }

    // table data lines, loop starting from 1
    for (j = 1 ; j < lines; j++) {     
        tab_text = tab_text + "<tr>" + tab.rows[j].innerHTML + "</tr>";
    }

    tab_text = tab_text + "</table>";
    tab_text = tab_text.replace(/<A[^>]*>|<\/A>/g, "");             //remove if u want links in your table
    tab_text = tab_text.replace(/<img[^>]*>/gi,"");                 // remove if u want images in your table
    tab_text = tab_text.replace(/<input[^>]*>|<\/input>/gi, "");    // reomves input params
    // console.log(tab_text); // aktivate so see the result (press F12 in browser)

    var ua = window.navigator.userAgent;
    var msie = ua.indexOf("MSIE "); 

     // if Internet Explorer
    if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./)) {
        txtArea1.document.open("txt/html","replace");
        txtArea1.document.write(tab_text);
        txtArea1.document.close();
        txtArea1.focus(); 
        sa = txtArea1.document.execCommand("SaveAs", true, "DataTableExport.xls");
    }  
    else // other browser not tested on IE 11
        sa = window.open('data:application/vnd.ms-excel,' + encodeURIComponent(tab_text));  

    return (sa);
}

What are named pipes?

Named pipes is a windows system for inter-process communication. In the case of SQL server, if the server is on the same machine as the client, then it is possible to use named pipes to tranfer the data, as opposed to TCP/IP.

What causes a TCP/IP reset (RST) flag to be sent?

Run a packet sniffer (e.g., Wireshark) also on the peer to see whether it's the peer who's sending the RST or someone in the middle.

How do I do a simple 'Find and Replace" in MsSQL?

This pointed me in the right direction, but I have a DB that originated in MSSQL 2000 and is still using the ntext data type for the column I was replacing on. When you try to run REPLACE on that type you get this error:

Argument data type ntext is invalid for argument 1 of replace function.

The simplest fix, if your column data fits within nvarchar, is to cast the column during replace. Borrowing the code from the accepted answer:

UPDATE YourTable
SET Column1 = REPLACE(cast(Column1 as nvarchar(max)),'a','b')
WHERE Column1 LIKE '%a%'

This worked perfectly for me. Thanks to this forum post I found for the fix. Hopefully this helps someone else!

Rails 4: how to use $(document).ready() with turbo-links

I found the following article which worked great for me and details the use of the following:

var load_this_javascript = function() { 
  // do some things 
}
$(document).ready(load_this_javascript)
$(window).bind('page:change', load_this_javascript)

SVG rounded corner

You are using a path element, why don't you just give the path a curve? See here for how to make curves using path elements: http://www.w3.org/TR/SVG/paths.html#PathDataCurveCommands

Debugging Stored Procedure in SQL Server 2008

Well the answer was sitting right in front of me the whole time.

In SQL Server Management Studio 2008 there is a Debug button in the toolbar. Set a break point in a query window to step through.

I dismissed this functionality at the beginning because I didn't think of stepping INTO the stored procedure, which you can do with ease.

SSMS basically does what FinnNK mentioned with the MSDN walkthrough but automatically.

So easy! Thanks for your help FinnNK.

Edit: I should add a step in there to find the stored procedure call with parameters I used SQL Profiler on my database.

Converting a PDF to PNG

One can also use the command line utilities included in poppler-utils package:

sudo apt-get install poppler-utils
pdftoppm --help
pdftocairo --help

Example:

pdftocairo -png mypage.pdf mypage.png

JS how to cache a variable

check out my js lib for caching: https://github.com/hoangnd25/cacheJS

My blog post: New way to cache your data with Javascript

Features:

Conveniently use array as key for saving cache
Support array and localStorage
Clear cache by context (clear all blog posts with authorId="abc")
No dependency

Basic usage:

Saving cache:

cacheJS.set({blogId:1,type:'view'},'<h1>Blog 1</h1>');
cacheJS.set({blogId:2,type:'view'},'<h1>Blog 2</h1>', null, {author:'hoangnd'});
cacheJS.set({blogId:3,type:'view'},'<h1>Blog 3</h1>', 3600, {author:'hoangnd',categoryId:2});

Retrieving cache:

cacheJS.get({blogId: 1,type: 'view'});

Flushing cache

cacheJS.removeByKey({blogId: 1,type: 'view'});
cacheJS.removeByKey({blogId: 2,type: 'view'});

cacheJS.removeByContext({author:'hoangnd'});

Switching provider

cacheJS.use('array');
cacheJS.use('array').set({blogId:1},'<h1>Blog 1</h1>')};

ROW_NUMBER() in MySQL

SELECT 
    @i:=@i+1 AS iterator, 
    t.*
FROM 
    tablename AS t,
    (SELECT @i:=0) AS foo

How to erase the file contents of text file in Python?

From user @jamylak an alternative form of open("filename","w").close() is

with open('filename.txt','w'): pass

How do I dispatch_sync, dispatch_async, dispatch_after, etc in Swift 3, Swift 4, and beyond?

in Xcode 8 use:

DispatchQueue.global(qos: .userInitiated).async { }

TNS-12505: TNS:listener does not currently know of SID given in connect descriptor

This worked for me like a magic.

I logged into database and registered the listener.

alter system set local_listener='(...)';
alter system register;

How to write subquery inside the OUTER JOIN Statement

You need the "correlation id" (the "AS SS" thingy) on the sub-select to reference the fields in the "ON" condition. The id's assigned inside the sub select are not usable in the join.

SELECT
       cs.CUSID
       ,dp.DEPID
FROM
    CUSTMR cs
        LEFT OUTER JOIN (
            SELECT
                    DEPID
                    ,DEPNAME
                FROM
                    DEPRMNT 
                WHERE
                    dp.DEPADDRESS = 'TOKYO'
        ) ss
            ON (
                ss.DEPID = cs.CUSID
                AND ss.DEPNAME = cs.CUSTNAME
            )
WHERE
    cs.CUSID != ''

Foreign Key to multiple tables

You have a few options, all varying in "correctness" and ease of use. As always, the right design depends on your needs.

You could simply create two columns in Ticket, OwnedByUserId and OwnedByGroupId, and have nullable Foreign Keys to each table.
You could create M:M reference tables enabling both ticket:user and ticket:group relationships. Perhaps in future you will want to allow a single ticket to be owned by multiple users or groups? This design does not enforce that a ticket must be owned by a single entity only.
You could create a default group for every user and have tickets simply owned by either a true Group or a User's default Group.
Or (my choice) model an entity that acts as a base for both Users and Groups, and have tickets owned by that entity.

Heres a rough example using your posted schema:

create table dbo.PartyType
(   
    PartyTypeId tinyint primary key,
    PartyTypeName varchar(10)
)

insert into dbo.PartyType
    values(1, 'User'), (2, 'Group');


create table dbo.Party
(
    PartyId int identity(1,1) primary key,
    PartyTypeId tinyint references dbo.PartyType(PartyTypeId),
    unique (PartyId, PartyTypeId)
)

CREATE TABLE dbo.[Group]
(
    ID int primary key,
    Name varchar(50) NOT NULL,
    PartyTypeId as cast(2 as tinyint) persisted,
    foreign key (ID, PartyTypeId) references Party(PartyId, PartyTypeID)
)  

CREATE TABLE dbo.[User]
(
    ID int primary key,
    Name varchar(50) NOT NULL,
    PartyTypeId as cast(1 as tinyint) persisted,
    foreign key (ID, PartyTypeId) references Party(PartyID, PartyTypeID)
)

CREATE TABLE dbo.Ticket
(
    ID int primary key,
    [Owner] int NOT NULL references dbo.Party(PartyId),
    [Subject] varchar(50) NULL
)

Launching a website via windows commandline

To open a URL with the default browser, you can execute:

rundll32 url.dll,FileProtocolHandler https://www.google.com

I had issues with URL parameters with the other solutions. However, this one seemed to work correctly.

Cannot obtain value of local or argument as it is not available at this instruction pointer, possibly because it has been optimized away

Regarding the problem with "Optimize code" property being UNCHECKED yet the code still compiling as optimized: What finally helped me after trying everything was checking the "Enable unmanaged code debugging" checkbox on the same settings page (Project properties - Debug). It doesn't directly relate to the code optimization, but with this enabled, VS no longer optimizes my library and I can debug.

Convert special characters to HTML in Javascript

In a PRE tag -and in most other HTML tags- plain text for a batch file that uses the output redirection characters (< and >) will break the HTML, but here is my tip: anything goes in a TEXTAREA element -it will not break the HTML, mainly because we are inside a control instanced and handled by the OS, and therefore its content are not being parsed by the HTML engine.

As an example, say I want to highlight the syntax of my batch file using javascript. I simply paste the code in a textarea without worrying about the HTML reserved characters, and have the script process the innerHTML property of the textarea, which evaluates to the text with the HTML reserved characters replaced by their corresponding ISO-8859-1 entities.

Browsers will escape special characters automatically when you retrieve the innerHTML (and outerHTML) property of an element. Using a textarea (and who knows, maybe an input of type text) just saves you from doing the conversion (manually or through code).

I use this trick to test my syntax highlighter, and when I'm done authoring and testing, I simply hide the textarea from view.

How do you log all events fired by an element in jQuery?

Just add this to the page and no other worries, will handle rest for you:

$('input').live('click mousedown mouseup focus keydown change blur', function(e) {
     console.log(e);
});

You can also use console.log('Input event:' + e.type) to make it easier.

DataFrame constructor not properly called! error

You are providing a string representation of a dict to the DataFrame constructor, and not a dict itself. So this is the reason you get that error.

So if you want to use your code, you could do:

df = DataFrame(eval(data))

But better would be to not create the string in the first place, but directly putting it in a dict. Something roughly like:

data = []
for row in result_set:
    data.append({'value': row["tag_expression"], 'key': row["tag_name"]})

But probably even this is not needed, as depending on what is exactly in your result_set you could probably:

provide this directly to a DataFrame: DataFrame(result_set)
or use the pandas read_sql_query function to do this for you (see docs on this)

Search for a particular string in Oracle clob column

select *  
from TABLE_NAME
where dbms_lob.instr(COLUMNNAME,'searchtext') > 0;

docker container ssl certificates

I am trying to do something similar to this. As commented above, I think you would want to build a new image with a custom Dockerfile (using the image you pulled as a base image), ADD your certificate, then RUN update-ca-certificates. This way you will have a consistent state each time you start a container from this new image.

# Dockerfile
FROM some-base-image:0.1
ADD you_certificate.crt:/container/cert/path
RUN update-ca-certificates

Let's say a docker build against that Dockerfile produced IMAGE_ID. On the next docker run -d [any other options] IMAGE_ID, the container started by that command will have your certificate info. Simple and reproducible.

How do you test your Request.QueryString[] variables?

Below is an extension method that will allow you to write code like this:

int id = request.QueryString.GetValue<int>("id");
DateTime date = request.QueryString.GetValue<DateTime>("date");

It makes use of TypeDescriptor to perform the conversion. Based on your needs, you could add an overload which takes a default value instead of throwing an exception:

public static T GetValue<T>(this NameValueCollection collection, string key)
{
    if(collection == null)
    {
        throw new ArgumentNullException("collection");
    }

    var value = collection[key];

    if(value == null)
    {
        throw new ArgumentOutOfRangeException("key");
    }

    var converter = TypeDescriptor.GetConverter(typeof(T));

    if(!converter.CanConvertFrom(typeof(string)))
    {
        throw new ArgumentException(String.Format("Cannot convert '{0}' to {1}", value, typeof(T)));
    }

    return (T) converter.ConvertFrom(value);
}

How to delete all files and folders in a folder by cmd call

One easy one-line option is to create an empty directory somewhere on your file system, and then use ROBOCOPY (http://technet.microsoft.com/en-us/library/cc733145.aspx) with the /MIR switch to remove all files and subfolders. By default, robocopy does not copy security, so the ACLs in your root folder should remain intact.

Also probably want to set a value for the retry switch, /r, because the default number of retries is 1 million.

robocopy "C:\DoNotDelete_UsedByScripts\EmptyFolder" "c:\temp\MyDirectoryToEmpty" /MIR /r:3

When to use SELECT ... FOR UPDATE?

The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been deleted is locking them with SELECT FOR UPDATE.

However in some systems locking is a side effect of concurrency control, and you achieve the same results without specifying FOR UPDATE explicitly.

To solve this problem, Thread 1 should SELECT id FROM rooms FOR UPDATE, thereby preventing Thread 2 from deleting from rooms until Thread 1 is done. Is that correct?

This depends on the concurrency control your database system is using.

MyISAM in MySQL (and several other old systems) does lock the whole table for the duration of a query.
In SQL Server, SELECT queries place shared locks on the records / pages / tables they have examined, while DML queries place update locks (which later get promoted to exclusive or demoted to shared locks). Exclusive locks are incompatible with shared locks, so either SELECT or DELETE query will lock until another session commits.
In databases which use MVCC (like Oracle, PostgreSQL, MySQL with InnoDB), a DML query creates a copy of the record (in one or another way) and generally readers do not block writers and vice versa. For these databases, a SELECT FOR UPDATE would come handy: it would lock either SELECT or the DELETE query until another session commits, just as SQL Server does.

When should one use REPEATABLE_READ transaction isolation versus READ_COMMITTED with SELECT ... FOR UPDATE?

Generally, REPEATABLE READ does not forbid phantom rows (rows that appeared or disappeared in another transaction, rather than being modified)

In Oracle and earlier PostgreSQL versions, REPEATABLE READ is actually a synonym for SERIALIZABLE. Basically, this means that the transaction does not see changes made after it has started. So in this setup, the last Thread 1 query will return the room as if it has never been deleted (which may or may not be what you wanted). If you don't want to show the rooms after they have been deleted, you should lock the rows with SELECT FOR UPDATE
In InnoDB, REPEATABLE READ and SERIALIZABLE are different things: readers in SERIALIZABLE mode set next-key locks on the records they evaluate, effectively preventing the concurrent DML on them. So you don't need a SELECT FOR UPDATE in serializable mode, but do need them in REPEATABLE READ or READ COMMITED.

Note that the standard on isolation modes does prescribe that you don't see certain quirks in your queries but does not define how (with locking or with MVCC or otherwise).

When I say "you don't need SELECT FOR UPDATE" I really should have added "because of side effects of certain database engine implementation".

How to remove the last element added into the List?

if you need to do it more often , you can even create your own method for pop the last element; something like this:

public void pop(List<string> myList) {
    myList.RemoveAt(myList.Count - 1);
}

or even instead of void you can return the value like:

public string pop (List<string> myList) {
    // first assign the  last value to a seperate string 
    string extractedString = myList(myList.Count - 1);
    // then remove it from list
    myList.RemoveAt(myList.Count - 1);
    // then return the value 
    return extractedString;
}

just notice that the second method's return type is not void , it is string b/c we want that function to return us a string ...

How do you add a timer to a C# console application

That's very nice, however in order to simulate some time passing we need to run a command that takes some time and that's very clear in second example.

However, the style of using a for loop to do some functionality forever takes a lot of device resources and instead we can use the Garbage Collector to do some thing like that.

We can see this modification in the code from the same book CLR Via C# Third Ed.

using System;
using System.Threading;

public static class Program {

   public static void Main() {
      // Create a Timer object that knows to call our TimerCallback
      // method once every 2000 milliseconds.
      Timer t = new Timer(TimerCallback, null, 0, 2000);
      // Wait for the user to hit <Enter>
      Console.ReadLine();
   }

   private static void TimerCallback(Object o) {
      // Display the date/time when this method got called.
      Console.WriteLine("In TimerCallback: " + DateTime.Now);
      // Force a garbage collection to occur for this demo.
      GC.Collect();
   }
}

Error while trying to run project: Unable to start program. Cannot find the file specified

I had the same problem.
The cause for me was that the Command option in Configuration Properties | Debugging had been reset to its default value.

Linux find file names with given string recursively

use ack its simple. just type ack <string to be searched>

Run exe file with parameters in a batch file

Unless it's just a simplified example for the question, my advice is that drop the batch wrapper and schedule PHP directly, more specifically the php-win.exe program, which won't open unnecessary windows.

Program: c:\program files\php\php-win.exe
Arguments: D:\mydocs\mp\index.php param1 param2

Otherwise, just quote stuff as Andrew points out.

In older versions of Windows, you should be able to put everything in the single "Run" text box (as long as you quote everything that has spaces):

"c:\program files\php\php-win.exe" D:\mydocs\mp\index.php param1 param2

How to get memory usage at runtime using C++?

I was looking for a Linux app to measure maximum memory used. valgrind is an excellent tool, but was giving me more information than I wanted. tstime seemed to be the best tool I could find. It measures "highwater" memory usage (RSS and virtual). See this answer.

How set the android:gravity to TextView from Java side in Android

textView.setGravity(Gravity.CENTER | Gravity.BOTTOM);

This will set gravity of your textview.

Use of REPLACE in SQL Query for newline/ carriage return characters

There are probably embedded tabs (CHAR(9)) etc. as well. You can find out what other characters you need to replace (we have no idea what your goal is) with something like this:

DECLARE @var NVARCHAR(255), @i INT;

SET @i = 1;

SELECT @var = AccountType FROM dbo.Account
  WHERE AccountNumber = 200
  AND AccountType LIKE '%Daily%';

CREATE TABLE #x(i INT PRIMARY KEY, c NCHAR(1), a NCHAR(1));

WHILE @i <= LEN(@var)
BEGIN
  INSERT #x 
    SELECT SUBSTRING(@var, @i, 1), ASCII(SUBSTRING(@var, @i, 1));

  SET @i = @i + 1;
END

SELECT i,c,a FROM #x ORDER BY i;

You might also consider doing better cleansing of this data before it gets into your database. Cleaning it every time you need to search or display is not the best approach.

warning: incompatible implicit declaration of built-in function ‘xyz’

Here is some C code that produces the above mentioned error:

int main(int argc, char **argv) {
  exit(1);
}

Compiled like this on Fedora 17 Linux 64 bit with gcc:

el@defiant ~/foo2 $ gcc -o n n2.c                                                               
n2.c: In function ‘main’:
n2.c:2:3: warning: incompatible implicit declaration of built-in 
function ‘exit’ [enabled by default]
el@defiant ~/foo2 $ ./n 
el@defiant ~/foo2 $

To make the warning go away, add this declaration to the top of the file:

#include <stdlib.h>

Simple Popup by using Angular JS

If you are using bootstrap.js then the below code might be useful. This is very simple. Dont have to write anything in js to invoke the pop-up.

Source :http://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_modal&stacked=h

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>Modal Example</h2>
  <!-- Trigger the modal with a button -->
  <button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>

  <!-- Modal -->
  <div class="modal fade" id="myModal" role="dialog">
    <div class="modal-dialog">

      <!-- Modal content-->
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal">&times;</button>
          <h4 class="modal-title">Modal Header</h4>
        </div>
        <div class="modal-body">
          <p>Some text in the modal.</p>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
      </div>

    </div>
  </div>

</div>

</body>
</html>

ActionController::InvalidAuthenticityToken

Following Chrome Lighthouse recommendations for a faster application load, I have asynced my Javascript:

views/layout/application.html.erb

<%= javascript_include_tag 'application', 'data-turbolinks-track' => 'reload', async: true %>

This broke everything and got that Token error for my remote forms. Removing async: true fixed the problem.

Windows Bat file optional argument parsing

Though I tend to agree with @AlekDavis' comment, there are nonetheless several ways to do this in the NT shell.

The approach I would take advantage of the SHIFT command and IF conditional branching, something like this...

@ECHO OFF

SET man1=%1
SET man2=%2
SHIFT & SHIFT

:loop
IF NOT "%1"=="" (
    IF "%1"=="-username" (
        SET user=%2
        SHIFT
    )
    IF "%1"=="-otheroption" (
        SET other=%2
        SHIFT
    )
    SHIFT
    GOTO :loop
)

ECHO Man1 = %man1%
ECHO Man2 = %man2%
ECHO Username = %user%
ECHO Other option = %other%

REM ...do stuff here...

:theend

Create a folder if it doesn't already exist

Something a bit more universal since this comes up on google. While the details are more specific, the title of this question is more universal.

/** 
 * recursively create a long directory path
 */
function createPath($path) {
    if (is_dir($path)) return true;
    $prev_path = substr($path, 0, strrpos($path, '/', -2) + 1 );
    $return = createPath($prev_path);
    return ($return && is_writable($prev_path)) ? mkdir($path) : false;
}

This will take a path, possibly with a long chain of uncreated directories, and keep going up one directory until it gets to an existing directory. Then it will attempt to create the next directory in that directory, and continue till it's created all the directories. It returns true if successful.

Could be improved by providing a stopping level so it just fails if it goes beyond user folder or something and by including permissions.

Proper way to set response status and JSON content in a REST API made with nodejs and express

res.status(500).jsonp(dataRes);

Getting "method not valid without suitable object" error when trying to make a HTTP request in VBA?

You probably haven't added a reference to Microsoft XML (any version) for Dim objHTTP As New MSXML2.XMLHTTP in the VBA window's Tools/References... dialog.

Also, it's a good idea to avoid using late binding (CreateObject...); better to use early binding (Dim objHTTP As New MSXML2.XMLHTTP), as early binding allows you to use Intellisense to list the members and do all sorts of design-time validation.

Inserting line breaks into PDF

If you are using fpdf, in order to be able to use line breaks you will need to use a multi-line text cell as described here.

If you use this, then line breaks in your text should be interpreted and converted correctly.

Just a quick example:

$pdf->Multicell(0,2,"This is a multi-line text string\nNew line\nNew line");

Here, 2 is the height of the multi-line text box. I don't know what units that's measured in or if you can just set it to 0 and ignore it. Perhaps try it with a large number if at first it doesn't work.

How to resize an image to a specific size in OpenCV?

Make a useful function like this:

IplImage* img_resize(IplImage* src_img, int new_width,int new_height)
{
    IplImage* des_img;
    des_img=cvCreateImage(cvSize(new_width,new_height),src_img->depth,src_img->nChannels);
    cvResize(src_img,des_img,CV_INTER_LINEAR);
    return des_img;
}

Counting the number of option tags in a select tag in jQuery

The best form is this

$('#example option').length

How to parse date string to Date?

A parse exception is a checked exception, so you must catch it with a try-catch when working with parsing Strings to Dates, as @miku suggested...

What does void do in java?

void means it returns nothing. It does not return a string, you write a string to System.out but you're not returning one.

You must specify what a method returns, even if you're just saying that it returns nothing.

Technically speaking they could have designed the language such that if you don't write a return type then it's assumed to return nothing, however making you explicitly write out void helps to ensure that the lack of a returned value is intentional and not accidental.

NVIDIA NVML Driver/library version mismatch

As @etal said, rebooting can solve this problem, but I think a procedure without rebooting will help.

For Chinese, check my blog -> ???

The error message

NVML: Driver/library version mismatch

tell us the Nvidia driver kernel module (kmod) have a wrong version, so we should unload this driver, and then load the correct version of kmod

How to do that ?

First, we should know which drivers are loaded.

lsmod | grep nvidia

you may get

nvidia_uvm            634880  8
nvidia_drm             53248  0
nvidia_modeset        790528  1 nvidia_drm
nvidia              12312576  86 nvidia_modeset,nvidia_uvm

our final goal is to unload nvidia mod, so we should unload the module depend on nvidia

sudo rmmod nvidia_drm
sudo rmmod nvidia_modeset
sudo rmmod nvidia_uvm

then, unload nvidia

sudo rmmod nvidia

Troubleshooting

if you get an error like rmmod: ERROR: Module nvidia is in use, which indicates that the kernel module is in use, you should kill the process that using the kmod:

sudo lsof /dev/nvidia*

and then kill those process, then continue to unload the kmods

Test

confirm you successfully unload those kmods

lsmod | grep nvidia

you should get nothing, then confirm you can load the correct driver

nvidia-smi

you should get the correct output

JavaScript: Create and destroy class instance through class method

1- There is no way to actually destroy an object in javascript, but using delete, we could remove a reference from an object:

var obj = {};
obj.mypointer = null;
delete obj.mypointer;

2- The important point about the delete keyword is that it does not actually destroy the object BUT if only after deleting that reference to the object, there is no other reference left in the memory pointed to the same object, that object would be marked as collectible. The delete keyword deletes the reference but doesn't GC the actual object. it means if you have several references of the same object, the object will be collected just after you delete all the pointed references.

3- there are also some tricks and workarounds that could help us out, when we want to make sure we do not leave any memory leaks behind. for instance if you have an array consisting several objects, without any other pointed reference to those objects, if you recreate the array all those objects would be killed. For instance if you have var array = [{}, {}] overriding the value of the array like array = [] would remove the references to the two objects inside the array and those two objects would be marked as collectible.

4- for your solution the easiest way is just this:

var storage = {};
storage.instance = new Class();
//since 'storage.instance' is your only reference to the object, whenever you wanted to destroy do this:
storage.instance = null;
// OR
delete storage.instance;

As mentioned above, either setting storage.instance = null or delete storage.instance would suffice to remove the reference to the object and allow it to be cleaned up by the GC. The difference is that if you set it to null then the storage object still has a property called instance (with the value null). If you delete storage.instance then the storage object no longer has a property named instance.

and WHAT ABOUT destroy method ??

the paradoxical point here is if you use instance.destroy in the destroy function you have no access to the actual instance pointer, and it won't let you delete it.

The only way is to pass the reference to the destroy function and then delete it:

// Class constructor
var Class = function () {
     this.destroy = function (baseObject, refName) {
         delete baseObject[refName];
     };
};

// instanciate
var storage = {};
storage.instance = new Class();
storage.instance.destroy(object, "instance");
console.log(storage.instance); // now it is undefined

BUT if I were you I would simply stick to the first solution and delete the object like this:

storage.instance = null;
// OR
delete storage.instance;

WOW it was too much :)

Finding even or odd ID values

In oracle,

select num from table where MOD (num, 2) = 0;

How to iterate through a DataTable

foreach (DataRow row in myDataTable.Rows)
{
   Console.WriteLine(row["ImagePath"]);
}

I am writing this from memory.
Hope this gives you enough hint to understand the object model.

DataTable -> DataRowCollection -> DataRow (which one can use & look for column contents for that row, either using columnName or ordinal).

-> = contains.

How to run 'sudo' command in windows

In Windows Powershell you can use Start-Process command with option -Verb RunAs to start and elevated process. Here is my sudo function example:

function sudo {
    Start-Process @args -verb runas
}

Ex: Open hosts file as Admin in notepad

sudo notepad C:\Windows\System32\drivers\etc\hosts

What is the difference between Sprint and Iteration in Scrum and length of each Sprint?

Sprint is just the term for an iteration.
You can change the Sprint length to be anything you want, but likely you'll want to try to find an amount of time that "works well" (which may mean any number of things for your team) and end up sticking with it over time.

String split on new line, tab and some number of spaces

Just use .strip(), it removes all whitespace for you, including tabs and newlines, while splitting. The splitting itself can then be done with data_string.splitlines():

[s.strip() for s in data_string.splitlines()]

Output:

>>> [s.strip() for s in data_string.splitlines()]
['Name: John Smith', 'Home: Anytown USA', 'Phone: 555-555-555', 'Other Home: Somewhere Else', 'Notes: Other data', 'Name: Jane Smith', 'Misc: Data with spaces']

You can even inline the splitting on : as well now:

>>> [s.strip().split(': ') for s in data_string.splitlines()]
[['Name', 'John Smith'], ['Home', 'Anytown USA'], ['Phone', '555-555-555'], ['Other Home', 'Somewhere Else'], ['Notes', 'Other data'], ['Name', 'Jane Smith'], ['Misc', 'Data with spaces']]

Git - Pushing code to two remotes

In recent versions of Git you can add multiple pushurls for a given remote. Use the following to add two pushurls to your origin:

git remote set-url --add --push origin git://original/repo.git
git remote set-url --add --push origin git://another/repo.git

So when you push to origin, it will push to both repositories.

UPDATE 1: Git 1.8.0.1 and 1.8.1 (and possibly other versions) seem to have a bug that causes --add to replace the original URL the first time you use it, so you need to re-add the original URL using the same command. Doing git remote -v should reveal the current URLs for each remote.

UPDATE 2: Junio C. Hamano, the Git maintainer, explained it's how it was designed. Doing git remote set-url --add --push <remote_name> <url> adds a pushurl for a given remote, which overrides the default URL for pushes. However, you may add multiple pushurls for a given remote, which then allows you to push to multiple remotes using a single git push. You can verify this behavior below:

$ git clone git://original/repo.git
$ git remote -v
origin  git://original/repo.git (fetch)
origin  git://original/repo.git (push)
$ git config -l | grep '^remote\.'
remote.origin.url=git://original/repo.git
remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*

Now, if you want to push to two or more repositories using a single command, you may create a new remote named all (as suggested by @Adam Nelson in comments), or keep using the origin, though the latter name is less descriptive for this purpose. If you still want to use origin, skip the following step, and use origin instead of all in all other steps.

So let's add a new remote called all that we'll reference later when pushing to multiple repositories:

$ git remote add all git://original/repo.git
$ git remote -v
all git://original/repo.git (fetch)               <-- ADDED
all git://original/repo.git (push)                <-- ADDED
origin  git://original/repo.git (fetch)
origin  git://original/repo.git (push)
$ git config -l | grep '^remote\.all'
remote.all.url=git://original/repo.git            <-- ADDED
remote.all.fetch=+refs/heads/*:refs/remotes/all/* <-- ADDED

Then let's add a pushurl to the all remote, pointing to another repository:

$ git remote set-url --add --push all git://another/repo.git
$ git remote -v
all git://original/repo.git (fetch)
all git://another/repo.git (push)                 <-- CHANGED
origin  git://original/repo.git (fetch)
origin  git://original/repo.git (push)
$ git config -l | grep '^remote\.all'
remote.all.url=git://original/repo.git
remote.all.fetch=+refs/heads/*:refs/remotes/all/*
remote.all.pushurl=git://another/repo.git         <-- ADDED

Here git remote -v shows the new pushurl for push, so if you do git push all master, it will push the master branch to git://another/repo.git only. This shows how pushurl overrides the default url (remote.all.url).

Now let's add another pushurl pointing to the original repository:

$ git remote set-url --add --push all git://original/repo.git
$ git remote -v
all git://original/repo.git (fetch)
all git://another/repo.git (push)
all git://original/repo.git (push)                <-- ADDED
origin  git://original/repo.git (fetch)
origin  git://original/repo.git (push)
$ git config -l | grep '^remote\.all'
remote.all.url=git://original/repo.git
remote.all.fetch=+refs/heads/*:refs/remotes/all/*
remote.all.pushurl=git://another/repo.git
remote.all.pushurl=git://original/repo.git        <-- ADDED

You see both pushurls we added are kept. Now a single git push all master will push the master branch to both git://another/repo.git and git://original/repo.git.

Docker: How to use bash with an Alpine based docker image?

Alpine docker image doesn't have bash installed by default. You will need to add following commands to get bash:

RUN apk update && apk add bash

If youre using Alpine 3.3+ then you can just do

RUN apk add --no-cache bash

to keep docker image size small. (Thanks to comment from @sprkysnrky)

How to save a Python interactive session?

You can use built-in function open: I use it in all of my programs in which I need to store some history (Including Calculator, etc.) for example:

#gk-test.py or anything else would do
try: # use the try loop only if you haven't created the history file outside program
    username = open("history.txt").readline().strip("\n")
    user_age = open("history.txt").readlines()[1].strip("\n")
except FileNotFoundError:
    username = input("Enter Username: ")
    user_age = input("Enter User's Age: ")
    open("history.txt", "w").write(f"{username}\n{user_age}")
#Rest of the code is secret! try it your own!

I would thank to all of them who liked my comments! Thank you for reading this!

Which icon sizes should my Windows application's icon include?

In the case of Windows 10 this is not exactly accurate, in fact none of the answers on stackoverflow was, I found this out when I tried to use pixel art as an icon and it got rescaled when it was not supposed to(it was easy to see in this case cause of the interpolation and smoothing windows does) even thou I used the sizes from this post.

So I made an app and did the work on all DPI settings, see it here:
Windows 10 all icon resolutions on all DPI settings
You can also use my app to create icons, also with nearest neighbor interpolation with smoothing off, which is not done with any of the bad editors I have seen.

If you only want the resolutions:
16, 20, 24, 28, 30, 31, 32, 40, 42, 47, 48, 56, 60, 63, 84, 256
and you should use all PNG icons and anything you put in beside these it won't be displayed. See my post why.

How to make a HTML list appear horizontally instead of vertically using CSS only?

Using display: inline-flex

_x000D_

#menu ul {_x000D_
  list-style: none;_x000D_
  margin: 0;_x000D_
  padding: 0;_x000D_
  display: inline-flex_x000D_
}

_x000D_

<div id="menu">_x000D_
  <ul>_x000D_
    <li>1 menu item</li>_x000D_
    <li>2 menu item</li>_x000D_
    <li>3 menu item</li>_x000D_
  </ul>_x000D_
</div>

_x000D_

Using display: inline-block

_x000D_

#menu ul {_x000D_
  list-style: none;_x000D_
  margin: 0;_x000D_
  padding: 0;_x000D_
}_x000D_
_x000D_
#menu li {_x000D_
  display: inline-block;_x000D_
}

_x000D_

<div id="menu">_x000D_
  <ul>_x000D_
    <li>1 menu item</li>_x000D_
    <li>2 menu item</li>_x000D_
    <li>3 menu item</li>_x000D_
  </ul>_x000D_
</div>

_x000D_

JQuery string contains check

var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";

sttr1.search(str2);

it will return the position of the match, or -1 if it isn't found.

What is the difference between "JPG" / "JPEG" / "PNG" / "BMP" / "GIF" / "TIFF" Image?

Since others have covered the differences, I'll hit the uses.

TIFF is usually used by scanners. It makes huge files and is not really used in applications.

BMP is uncompressed and also makes huge files. It is also not really used in applications.

GIF used to be all over the web but has fallen out of favor since it only supports a limited number of colors and is patented.

JPG/JPEG is mainly used for anything that is photo quality, though not for text. The lossy compression used tends to mar sharp lines.

PNG isn't as small as JPEG but is lossless so it's good for images with sharp lines. It's in common use on the web now.

Personally, I usually use PNG everywhere I can. It's a good compromise between JPG and GIF.

Multiple Where clauses in Lambda expressions

You can include it in the same where statement with the && operator...

x=> x.Lists.Include(l => l.Title).Where(l=>l.Title != String.Empty 
    && l.InternalName != String.Empty)

You can use any of the comparison operators (think of it like doing an if statement) such as...

List<Int32> nums = new List<int>();

nums.Add(3);
nums.Add(10);
nums.Add(5);

var results = nums.Where(x => x == 3 || x == 10);

...would bring back 3 and 10.

Best way to create an empty map in Java

1) If the Map can be immutable:

Collections.emptyMap()

// or, in some cases:
Collections.<String, String>emptyMap()

You'll have to use the latter sometimes when the compiler cannot automatically figure out what kind of Map is needed (this is called type inference). For example, consider a method declared like this:

public void foobar(Map<String, String> map){ ... }

When passing the empty Map directly to it, you have to be explicit about the type:

foobar(Collections.emptyMap());                 // doesn't compile
foobar(Collections.<String, String>emptyMap()); // works fine

2) If you need to be able to modify the Map, then for example:

new HashMap<String, String>()

(as tehblanx pointed out)

Addendum: If your project uses Guava, you have the following alternatives:

1) Immutable map:

ImmutableMap.of()
// or:
ImmutableMap.<String, String>of()

Granted, no big benefits here compared to Collections.emptyMap(). From the Javadoc:

This map behaves and performs comparably to Collections.emptyMap(), and is preferable mainly for consistency and maintainability of your code.

2) Map that you can modify:

Maps.newHashMap()
// or:
Maps.<String, String>newHashMap()

Maps contains similar factory methods for instantiating other types of maps as well, such as TreeMap or LinkedHashMap.

Update (2018): On Java 9 or newer, the shortest code for creating an immutable empty map is:

Map.of()

...using the new convenience factory methods from JEP 269.

Javascript set img src

Your src property is an object because you are setting the src element to be the entire image you created in JavaScript.

Try

document["pic1"].src = searchPic.src;

Get MAC address using shell script

oh, if you want only the mac ether mac address, you can use that:

ifconfig | grep "ether*" | tr -d ' ' | tr -d '\t' | cut -c 6-42

(work on macintosh)

ifconfig -- get all info
grep -- keep the line with address
tr -- clean all
cut -- remove the "ether" to have only the address

string in namespace std does not name a type

You need to

#include <string>

<iostream> declares cout, cin, not string.

Get file path of image on Android

I am doing this on click of Button.

private static final int CAMERA_PIC_REQUEST = 1;

private View.OnClickListener  OpenCamera=new View.OnClickListener() {

            @Override
            public void onClick(View paramView) {
                // TODO Auto-generated method stub

                Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

                NewSelectedImageURL=null;
                //outfile where we are thinking of saving it
                Date date = new Date();
                SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");

                String newPicFile = RecipeName+ df.format(date) + ".png";


                String outPath =Environment.getExternalStorageDirectory() + "/myFolderName/"+ newPicFile ;
                File outFile = new File(outPath);               

                CapturedImageURL=outFile.toString();
                Uri outuri = Uri.fromFile(outFile);
                cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, outuri);            
                startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);  

            }
        };

You can get the URL of the recently Captured Image from variable CapturedImageURL

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  


    //////////////////////////////////////
    if (requestCode == CAMERA_PIC_REQUEST) {  
        // do something  

         if (resultCode == RESULT_OK) 
         {
             Uri uri = null;

             if (data != null) 
             {
                 uri = data.getData();
             }
             if (uri == null && CapturedImageURL != null) 
             {
                 uri = Uri.fromFile(new File(CapturedImageURL));
             }
             File file = new File(CapturedImageURL);
             if (!file.exists()) {
                file.mkdir();
                sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+Environment.getExternalStorageDirectory())));
            }




         }


    }

Are there bookmarks in Visual Studio Code?

Under the general heading of 'editors always forget to document getting out…' to toggle go to another line and press the combination ctrl+shift+'N' to erase the current bookmark do the same on marked line…

Regex to match a 2-digit number (to validate Credit/Debit Card Issue number)

Something like this would work

/^\d{2}$/

What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN?

INNER JOIN gets all records that are common between both tables based on the supplied ON clause.

LEFT JOIN gets all records from the LEFT linked and the related record from the right table ,but if you have selected some columns from the RIGHT table, if there is no related records, these columns will contain NULL.

RIGHT JOIN is like the above but gets all records in the RIGHT table.

FULL JOIN gets all records from both tables and puts NULL in the columns where related records do not exist in the opposite table.

Support for "border-radius" in IE

The corner radius issue of IE gonna solve.

http://kbala.com/ie-9-supports-corner-radius/

How to get list of dates between two dates in mysql select query

Try:

select * from 
(select adddate('1970-01-01',t4.i*10000 + t3.i*1000 + t2.i*100 + t1.i*10 + t0.i) selected_date from
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t0,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t1,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t2,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t3,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t4) v
where selected_date between '2012-02-10' and '2012-02-15'

-for date ranges up to nearly 300 years in the future.

[Corrected following a suggested edit by UrvishAtSynapse.]

Convert Object to JSON string

jQuery does only make some regexp checking before calling the native browser method window.JSON.parse(). If that is not available, it uses eval() or more exactly new Function() to create a Javascript object.

The opposite of JSON.parse() is JSON.stringify() which serializes a Javascript object into a string. jQuery does not have functionality of its own for that, you have to use the browser built-in version or json2.js from http://www.json.org

JSON.stringify() is available in all major browsers, but to be compatible with older browsers you still need that fallback.

Using array map to filter results with if conditional

You're looking for the .filter() function:

  $scope.appIds = $scope.applicationsHere.filter(function(obj) {
    return obj.selected;
  });

That'll produce an array that contains only those objects whose "selected" property is true (or truthy).

edit sorry I was getting some coffee and I missed the comments - yes, as jAndy noted in a comment, to filter and then pluck out just the "id" values, it'd be:

  $scope.appIds = $scope.applicationsHere.filter(function(obj) {
    return obj.selected;
  }).map(function(obj) { return obj.id; });

Some functional libraries (like Functional, which in my opinion doesn't get enough love) have a .pluck() function to extract property values from a list of objects, but native JavaScript has a pretty lean set of such tools.

How to toggle (hide / show) sidebar div using jQuery

See this fiddle for a preview and check the documentation for jquerys toggle and animate methods.

$('#toggle').toggle(function(){
    $('#A').animate({width:0});
    $('#B').animate({left:0});
},function(){
    $('#A').animate({width:200});
    $('#B').animate({left:200});
});

Basically you animate on the properties that sets the layout.

A more advanced version:

$('#toggle').toggle(function(){
    $('#A').stop(true).animate({width:0});
    $('#B').stop(true).animate({left:0});
},function(){
    $('#A').stop(true).animate({width:200});
    $('#B').stop(true).animate({left:200});
})

This stops the previous animation, clears animation queue and begins the new animation.

Map isn't showing on Google Maps JavaScript API v3 when nested in a div tag

FIXED

Give initial height of div and specify height in percentage in your style;

#map {
   height: 100%;
}

<div id="map" style="clear:both; height:200px;"></div>

HTTP Error 503, the service is unavailable

For my case, My Default Application Pool was offline, to troubleshoot the problem, I checked the IIS logs located in C:\Windows\System32\LogFile\HTTPERR Scroll down to the most recent error logs, this will show you problems with IIS if any My Error was "503 1 AppOffline DefaultPool"

Solution Open you IIS Manager, -Click on Application Pools, this lists all application pool to your right. -Check if the application pools hosting your api or site has a stop sign on it, If so, right click the application pool and click start. _Trying again to access your service from the client This worked for me. Shouts out to @kombsh

Get ConnectionString from appsettings.json instead of being hardcoded in .NET Core 2.0 App

If you need in different Layer :

Create a Static Class and expose all config properties on that layer as below :

_x000D_

using Microsoft.Extensions.Configuration;_x000D_
using System.IO;_x000D_
_x000D_
namespace Core.DAL_x000D_
{_x000D_
    public static class ConfigSettings_x000D_
    {_x000D_
        public static string conStr1 { get ; }_x000D_
        static ConfigSettings()_x000D_
        {_x000D_
            var configurationBuilder = new ConfigurationBuilder();_x000D_
            string path = Path.Combine(Directory.GetCurrentDirectory(), "appsettings.json");_x000D_
            configurationBuilder.AddJsonFile(path, false);_x000D_
            conStr1 = configurationBuilder.Build().GetSection("ConnectionStrings:ConStr1").Value;_x000D_
        }_x000D_
    }_x000D_
}

_x000D_

What are the different NameID format used for?

1 and 2 are SAML 1.1 because those URIs were part of the OASIS SAML 1.1 standard. Section 8.3 of the linked PDF for the OASIS SAML 2.0 standard explains this:

Where possible an existing URN is used to specify a protocol. In the case of IETF protocols, the URN of the most current RFC that specifies the protocol is used. URI references created specifically for SAML have one of the following stems, according to the specification set version in which they were first introduced:
urn:oasis:names:tc:SAML:1.0:
urn:oasis:names:tc:SAML:1.1:
urn:oasis:names:tc:SAML:2.0:

Trigger an action after selection select2

It works for me:

$('#yourselect').on("change", function(e) { 
   // what you would like to happen
});

What's the default password of mariadb on fedora?

mariadb uses by defaults UNIX_SOCKET plugin to authenticate user root. https://mariadb.com/kb/en/mariadb/unix_socket-authentication-plugin/

"Because he has identified himself to the operating system, he does not need to do it again for the database"

so you need to login as the root user on unix to login as root in mysql/mariadb:

sudo mysql

if you want to login with root from your normal unix user, you can disable the authentication plugin for root.

Beforehand you can set the root password with mysql_secure_installation (default password is blank), then to let every user authenticate as root login with:

shell$ sudo mysql -u root
[mysql] use mysql;
[mysql] update user set plugin='' where User='root';
[mysql] flush privileges;
[mysql] \q

Python Timezone conversion

To convert a time in one timezone to another timezone in Python, you could use datetime.astimezone():

time_in_new_timezone = time_in_old_timezone.astimezone(new_timezone)

Given aware_dt (a datetime object in some timezone), to convert it to other timezones and to print the times in a given time format:

#!/usr/bin/env python3
import pytz  # $ pip install pytz

time_format = "%Y-%m-%d %H:%M:%S%z"
tzids = ['Asia/Shanghai', 'Europe/London', 'America/New_York']
for tz in map(pytz.timezone, tzids):
    time_in_tz = aware_dt.astimezone(tz)
    print(f"{time_in_tz:{time_format}}")

^{If f"" syntax is unavailable, you could replace it with "".format(**vars())}

where you could set aware_dt from the current time in the local timezone:

from datetime import datetime
import tzlocal  # $ pip install tzlocal

local_timezone = tzlocal.get_localzone()
aware_dt = datetime.now(local_timezone) # the current time

Or from the input time string in the local timezone:

naive_dt = datetime.strptime(time_string, time_format)
aware_dt = local_timezone.localize(naive_dt, is_dst=None)

where time_string could look like: '2016-11-19 02:21:42'. It corresponds to time_format = '%Y-%m-%d %H:%M:%S'.

is_dst=None forces an exception if the input time string corresponds to a non-existing or ambiguous local time such as during a DST transition. You could also pass is_dst=False, is_dst=True. See links with more details at Python: How do you convert datetime/timestamp from one timezone to another timezone?

Using variable in SQL LIKE statement

It may be as simple as LIKE '%%[%3]%%' being [%3] the input variable.

This works for me with SAP B1 9.1

Why use argparse rather than optparse?

As of python 2.7, optparse is deprecated, and will hopefully go away in the future.

argparse is better for all the reasons listed on its original page (https://code.google.com/archive/p/argparse/):

handling positional arguments
supporting sub-commands
allowing alternative option prefixes like + and /
handling zero-or-more and one-or-more style arguments
producing more informative usage messages
providing a much simpler interface for custom types and actions

More information is also in PEP 389, which is the vehicle by which argparse made it into the standard library.

Ansible: get current target host's IP address

A list of all addresses is stored in a fact ansible_all_ipv4_addresses, a default address in ansible_default_ipv4.address.

---
- hosts: localhost
  connection: local
  tasks:
    - debug: var=ansible_all_ipv4_addresses
    - debug: var=ansible_default_ipv4.address

Then there are addresses assigned to each network interface... In such cases you can display all the facts and find the one that has the value you want to use.

Input group - two inputs close to each other

To show more than one inputs inline without using "form-inline" class you can use the next code:

<div class="input-group">
    <input type="text" class="form-control" value="First input" />
    <span class="input-group-btn"></span>
    <input type="text" class="form-control" value="Second input" />
</div>

Then using CSS selectors:

/* To remove space between text inputs */
.input-group > .input-group-btn:empty {
    width: 0px;
}

Basically you have to insert an empty span tag with "input-group-btn" class between input tags.

If you want to see more examples of input groups and bootstrap-select groups take a look at this URL: http://jsfiddle.net/vkhusnulina/gze0Lcm0

trying to align html button at the center of the my page

Here is the solution as asked

_x000D_

<button type="button" style="background-color:yellow;margin:auto;display:block">mybuttonname</button>

_x000D_

Scrollable Menu with Bootstrap - Menu expanding its container when it should not

Do everything in the inline of UL tag

<ul class="dropdown-menu scrollable-menu" role="menu" style="height: auto;max-height: 200px; overflow-x: hidden;">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Action</a></li>
                ..
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
            </ul>

How to vertically center an image inside of a div element in HTML using CSS?

The accepted answer did not work for me. vertical-align needs a partner so that they can be aligned at their centers. So I created an empty div with full height of the parent div but with no width for the image to align with. inline-block is needed for both objects to stay in one line.

<div>
    <div class="placeholder"></div>
    <img />
</div>

CSS:

.class {
    height: 100%;
    width: 0%;
    vertical-align: middle;
    display: inline-block
}
img {
    display: inline-block;
    vertical-align: middle;
}

How to place and center text in an SVG rectangle

alignment-baseline is not the right attribute to use here. The correct answer is to use a combination of dominant-baseline="central" and text-anchor="middle":

_x000D_

<svg width="200" height="100">_x000D_
    <g>_x000D_
        <rect x="0" y="0" width="200" height="100" style="stroke:red; stroke-width:3px; fill:white;"/>_x000D_
        <text x="50%" y="50%" style="dominant-baseline:central; text-anchor:middle; font-size:40px;">TEXT</text>_x000D_
    </g>_x000D_
</svg>

_x000D_

How to insert current datetime in postgresql insert query

timestamp (or date or time columns) do NOT have "a format".

Any formatting you see is applied by the SQL client you are using.

To insert the current time use current_timestamp as documented in the manual:

INSERT into "Group" (name,createddate) 
VALUES ('Test', current_timestamp);

To display that value in a different format change the configuration of your SQL client or format the value when SELECTing the data:

select name, to_char(createddate, ''yyyymmdd hh:mi:ss tt') as created_date
from "Group"

For psql (the default command line client) you can configure the display format through the configuration parameter DateStyle: https://www.postgresql.org/docs/current/static/runtime-config-client.html#GUC-DATESTYLE

Copy Notepad++ text with formatting?

For those who do not see Plugins->NPPExport,

Download Plugin Manager from this. Extract contents and place under C/ProgramFile/NP++ installation, plugins & updater folder. Restart NP++. You should be able to see Plugins->Plugin Manager then. You can download any plugin, including NPPExport and install it to see the Copy command.

What's the difference between ISO 8601 and RFC 3339 Date Formats?

Is one just an extension?

Pretty much, yes - RFC 3339 is listed as a profile of ISO 8601. Most notably RFC 3339 specifies a complete representation of date and time (only fractional seconds are optional). The RFC also has some small, subtle differences. For example truncated representations of years with only two digits are not allowed -- RFC 3339 requires 4-digit years, and the RFC only allows a period character to be used as the decimal point for fractional seconds. The RFC also allows the "T" to be replaced by a space (or other character), while the standard only allows it to be omitted (and only when there is agreement between all parties using the representation).

I wouldn't worry too much about the differences between the two, but on the off-chance your use case runs in to them, it'd be worth your while taking a glance at:

What is the purpose and use of **kwargs?

kwargs are a syntactic sugar to pass name arguments as dictionaries(for func), or dictionaries as named arguments(to func)

How to pass a value to razor variable from javascript variable?

here is my solution that works:

in my form i use:

@using (Html.BeginForm("RegisterOrder", "Account", FormMethod.Post, new { @class = "form", role = "form" }))
  {

   @Html.TextBoxFor(m => m.Email, new { @class = "form-control" })

   @Html.HiddenFor(m => m.quantity, new { id = "quantity", Value = 0 })

  }

in my file.js I get the quantity from a GET request and pass the variable as follows to the form:

    $http({
        method: 'Get',
        url: "https://xxxxxxx.azurewebsites.net/api/quantity/" + usr
    })
        .success(function (data){

            setQuantity(data.number);

            function setQuantity(number) {
                $('#quantity').val(number);
            }

        });

What is the backslash character (\\)?

\ is used for escape sequences in programming languages.

\n prints a newline
\\ prints a backslash
\" prints "
\t prints a tabulator
\b moves the cursor one back

Printing long int value in C

To take input " long int " and output " long int " in C is :

long int n;
scanf("%ld", &n);
printf("%ld", n);

To take input " long long int " and output " long long int " in C is :

long long int n;
scanf("%lld", &n);
printf("%lld", n);

Hope you've cleared..

How do I set the default locale in the JVM?

You can set it on the command line via JVM parameters:

java -Duser.country=CA -Duser.language=fr ... com.x.Main

For further information look at Internationalization: Understanding Locale in the Java Platform - Using Locale

Python 3.1.1 string to hex

base64.b16encode and base64.b16decode convert bytes to and from hex and work across all Python versions. The codecs approach also works, but is less straightforward in Python 3.

SQL JOIN vs IN performance?

Funny you mention that, I did a blog post on this very subject.

See Oracle vs MySQL vs SQL Server: Aggregation vs Joins

Short answer: you have to test it and individual databases vary a lot.

In WPF, what are the differences between the x:Name and Name attributes?

x:Name and Name are referencing different namespaces.

x:name is a reference to the x namespace defined by default at the top of the Xaml file.

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Just saying Name uses the default below namespace.

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

x:Name is saying use the namespace that has the x alias. x is the default and most people leave it but you can change it to whatever you like

xmlns:foo="http://schemas.microsoft.com/winfx/2006/xaml"

so your reference would be foo:name

Define and Use Namespaces in WPF

OK lets look at this a different way. Say you drag and drop an button onto your Xaml page. You can reference this 2 ways x:name and name. All xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" and xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" are is references to multiple namespaces. Since xaml holds the Control namespace(not 100% on that) and presentation holds the FrameworkElement AND the Button class has a inheritance pattern of:

Button : ButtonBase
ButtonBase : ContentControl, ICommandSource
ContentControl : Control, IAddChild
Control : FrameworkElement
FrameworkElement : UIElement, IFrameworkInputElement, 
                    IInputElement, ISupportInitialize, IHaveResources

So as one would expect anything that inherits from FrameworkElement would have access to all its public attributes. so in the case of Button it is getting its Name attribute from FrameworkElement, at the very top of the hierarchy tree. So you can say x:Name or Name and they will both be accessing the getter/setter from the FrameworkElement.

MSDN Reference

WPF defines a CLR attribute that is consumed by XAML processors in order to map multiple CLR namespaces to a single XML namespace. The XmlnsDefinitionAttribute attribute is placed at the assembly level in the source code that produces the assembly. The WPF assembly source code uses this attribute to map the various common namespaces, such as System.Windows and System.Windows.Controls, to the http://schemas.microsoft.com/winfx/2006/xaml/presentation namespace.

So the assembly attributes will look something like:

PresentationFramework.dll - XmlnsDefinitionAttribute:

[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows")]

[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Data")]

[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Navigation")]

[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Shapes")]

[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Documents")]

[assembly: XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml/presentation", "System.Windows.Controls")]

TypeError: method() takes 1 positional argument but 2 were given

Pass cls parameter into @classmethod to resolve this problem.

@classmethod
def test(cls):
    return ''

Javascript window.open pass values using POST

Thank you php-b-grader. I improved the code, it is not necessary to use window.open(), the target is already specified in the form.

// Create a form
var mapForm = document.createElement("form");
mapForm.target = "_blank";    
mapForm.method = "POST";
mapForm.action = "abmCatalogs.ftl";

// Create an input
var mapInput = document.createElement("input");
mapInput.type = "text";
mapInput.name = "variable";
mapInput.value = "lalalalala";

// Add the input to the form
mapForm.appendChild(mapInput);

// Add the form to dom
document.body.appendChild(mapForm);

// Just submit
mapForm.submit();

for target options --> w3schools - Target

PHP new line break in emails

if you are outputting the code as html - change /n -->
and do echo $message;

Apply style ONLY on IE

@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
   #myElement {
        /* Enter your style code */
   }
}

Explanation: It is a Microsoft-specific media query. Using -ms-high-contrast property specific to Microsoft IE, it will only be parsed in Internet Explorer 10 or greater. I have used both the valid values of the media query, so it will be parsed by IE only, whether the user has high contrast enabled or not.

How to change string into QString?

Moreover, to convert whatever you want, you can use the QVariant class.

for example:

std::string str("hello !");
qDebug() << QVariant(str.c_str()).toString();
int test = 10;
double titi = 5.42;
qDebug() << QVariant(test).toString();
qDebug() << QVariant(titi).toString();
qDebug() << QVariant(titi).toInt();

output

"hello !"
"10"
"5.42"
5

Angular - Can't make ng-repeat orderBy work

The orderBy only works with Arrays -- See http://docs.angularjs.org/api/ng.filter:orderBy

Also a great filter to use for Objects instead of Arrays @ Angularjs OrderBy on ng-repeat doesn't work

How to change angular port from 4200 to any other

You can try:

ng serve --host 0.0.0.0 --port 4001

Then launch browser with: http://localhost:4001/

How to merge multiple dicts with same key or different key?

Here's a general solution that will handle an arbitrary amount of dictionaries, with cases when keys are in only some of the dictionaries:

from collections import defaultdict

d1 = {1: 2, 3: 4}
d2 = {1: 6, 3: 7}

dd = defaultdict(list)

for d in (d1, d2): # you can list as many input dicts as you want here
    for key, value in d.items():
        dd[key].append(value)

print(dd)

Shows:

defaultdict(<type 'list'>, {1: [2, 6], 3: [4, 7]})

Also, to get your .attrib, just change append(value) to append(value.attrib)

Executing set of SQL queries using batch file?

Use the SQLCMD utility.

http://technet.microsoft.com/en-us/library/ms162773.aspx

There is a connect statement that allows you to swing from database server A to server B in the same batch.

:Connect server_name[\instance_name] [-l timeout] [-U user_name [-P password]] Connects to an instance of SQL Server. Also closes the current connection.

On the other hand, if you are familiar with PowerShell, you can programmatic do the same.

http://technet.microsoft.com/en-us/library/cc281954(v=sql.105).aspx

Hibernate, @SequenceGenerator and allocationSize

allocationSize=1 It is a micro optimization before getting query Hibernate tries to assign value in the range of allocationSize and so try to avoid querying database for sequence. But this query will be executed every time if you set it to 1. This hardly makes any difference since if your data base is accessed by some other application then it will create issues if same id is used by another application meantime .

Next generation of Sequence Id is based on allocationSize.

By defualt it is kept as 50 which is too much. It will also only help if your going to have near about 50 records in one session which are not persisted and which will be persisted using this particular session and transation.

So you should always use allocationSize=1 while using SequenceGenerator. As for most of underlying databases sequence is always incremented by 1.

Get current controller in view

Other way to get current Controller name in View

@ViewContext.Controller.ValueProvider.GetValue("controller").RawValue

How can I see if a Perl hash already has a certain key?

I guess that this code should answer your question:

use strict;
use warnings;

my @keys = qw/one two three two/;
my %hash;
for my $key (@keys)
{
    $hash{$key}++;
}

for my $key (keys %hash)
{
   print "$key: ", $hash{$key}, "\n";
}

Output:

three: 1
one: 1
two: 2

The iteration can be simplified to:

$hash{$_}++ for (@keys);

(See $_ in perlvar.) And you can even write something like this:

$hash{$_}++ or print "Found new value: $_.\n" for (@keys);

Which reports each key the first time it’s found.

Hosting a Maven repository on github

The best solution I've been able to find consists of these steps:

Create a branch called mvn-repo to host your maven artifacts.
Use the github site-maven-plugin to push your artifacts to github.
Configure maven to use your remote mvn-repo as a maven repository.

There are several benefits to using this approach:

Maven artifacts are kept separate from your source in a separate branch called mvn-repo, much like github pages are kept in a separate branch called gh-pages (if you use github pages)
Unlike some other proposed solutions, it doesn't conflict with your gh-pages if you're using them.
Ties in naturally with the deploy target so there are no new maven commands to learn. Just use mvn deploy as you normally would

The typical way you deploy artifacts to a remote maven repo is to use mvn deploy, so let's patch into that mechanism for this solution.

First, tell maven to deploy artifacts to a temporary staging location inside your target directory. Add this to your pom.xml:

<distributionManagement>
    <repository>
        <id>internal.repo</id>
        <name>Temporary Staging Repository</name>
        <url>file://${project.build.directory}/mvn-repo</url>
    </repository>
</distributionManagement>

<plugins>
    <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.8.1</version>
        <configuration>
            <altDeploymentRepository>internal.repo::default::file://${project.build.directory}/mvn-repo</altDeploymentRepository>
        </configuration>
    </plugin>
</plugins>

Now try running mvn clean deploy. You'll see that it deployed your maven repository to target/mvn-repo. The next step is to get it to upload that directory to GitHub.

Add your authentication information to ~/.m2/settings.xml so that the github site-maven-plugin can push to GitHub:

<!-- NOTE: MAKE SURE THAT settings.xml IS NOT WORLD READABLE! -->
<settings>
  <servers>
    <server>
      <id>github</id>
      <username>YOUR-USERNAME</username>
      <password>YOUR-PASSWORD</password>
    </server>
  </servers>
</settings>

(As noted, please make sure to chmod 700 settings.xml to ensure no one can read your password in the file. If someone knows how to make site-maven-plugin prompt for a password instead of requiring it in a config file, let me know.)

Then tell the GitHub site-maven-plugin about the new server you just configured by adding the following to your pom:

<properties>
    <!-- github server corresponds to entry in ~/.m2/settings.xml -->
    <github.global.server>github</github.global.server>
</properties>

Finally, configure the site-maven-plugin to upload from your temporary staging repo to your mvn-repo branch on Github:

<build>
    <plugins>
        <plugin>
            <groupId>com.github.github</groupId>
            <artifactId>site-maven-plugin</artifactId>
            <version>0.11</version>
            <configuration>
                <message>Maven artifacts for ${project.version}</message>  <!-- git commit message -->
                <noJekyll>true</noJekyll>                                  <!-- disable webpage processing -->
                <outputDirectory>${project.build.directory}/mvn-repo</outputDirectory> <!-- matches distribution management repository url above -->
                <branch>refs/heads/mvn-repo</branch>                       <!-- remote branch name -->
                <includes><include>**/*</include></includes>
                <repositoryName>YOUR-REPOSITORY-NAME</repositoryName>      <!-- github repo name -->
                <repositoryOwner>YOUR-GITHUB-USERNAME</repositoryOwner>    <!-- github username  -->
            </configuration>
            <executions>
              <!-- run site-maven-plugin's 'site' target as part of the build's normal 'deploy' phase -->
              <execution>
                <goals>
                  <goal>site</goal>
                </goals>
                <phase>deploy</phase>
              </execution>
            </executions>
        </plugin>
    </plugins>
</build>

The mvn-repo branch does not need to exist, it will be created for you.

Now run mvn clean deploy again. You should see maven-deploy-plugin "upload" the files to your local staging repository in the target directory, then site-maven-plugin committing those files and pushing them to the server.

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building DaoCore 1.3-SNAPSHOT
[INFO] ------------------------------------------------------------------------
...
[INFO] --- maven-deploy-plugin:2.5:deploy (default-deploy) @ greendao ---
Uploaded: file:///Users/mike/Projects/greendao-emmby/DaoCore/target/mvn-repo/com/greendao-orm/greendao/1.3-SNAPSHOT/greendao-1.3-20121223.182256-3.jar (77 KB at 2936.9 KB/sec)
Uploaded: file:///Users/mike/Projects/greendao-emmby/DaoCore/target/mvn-repo/com/greendao-orm/greendao/1.3-SNAPSHOT/greendao-1.3-20121223.182256-3.pom (3 KB at 1402.3 KB/sec)
Uploaded: file:///Users/mike/Projects/greendao-emmby/DaoCore/target/mvn-repo/com/greendao-orm/greendao/1.3-SNAPSHOT/maven-metadata.xml (768 B at 150.0 KB/sec)
Uploaded: file:///Users/mike/Projects/greendao-emmby/DaoCore/target/mvn-repo/com/greendao-orm/greendao/maven-metadata.xml (282 B at 91.8 KB/sec)
[INFO] 
[INFO] --- site-maven-plugin:0.7:site (default) @ greendao ---
[INFO] Creating 24 blobs
[INFO] Creating tree with 25 blob entries
[INFO] Creating commit with SHA-1: 0b8444e487a8acf9caabe7ec18a4e9cff4964809
[INFO] Updating reference refs/heads/mvn-repo from ab7afb9a228bf33d9e04db39d178f96a7a225593 to 0b8444e487a8acf9caabe7ec18a4e9cff4964809
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 8.595s
[INFO] Finished at: Sun Dec 23 11:23:03 MST 2012
[INFO] Final Memory: 9M/81M
[INFO] ------------------------------------------------------------------------

Visit github.com in your browser, select the mvn-repo branch, and verify that all your binaries are now there.

enter image description here

Congratulations!

You can now deploy your maven artifacts to a poor man's public repo simply by running mvn clean deploy.

There's one more step you'll want to take, which is to configure any poms that depend on your pom to know where your repository is. Add the following snippet to any project's pom that depends on your project:

<repositories>
    <repository>
        <id>YOUR-PROJECT-NAME-mvn-repo</id>
        <url>https://github.com/YOUR-USERNAME/YOUR-PROJECT-NAME/raw/mvn-repo/</url>
        <snapshots>
            <enabled>true</enabled>
            <updatePolicy>always</updatePolicy>
        </snapshots>
    </repository>
</repositories>

Now any project that requires your jar files will automatically download them from your github maven repository.

Edit: to avoid the problem mentioned in the comments ('Error creating commit: Invalid request. For 'properties/name', nil is not a string.'), make sure you state a name in your profile on github.

jQuery: how to change title of document during .ready()?

If you have got a serverside script get_title.php that echoes the current title session this works fine in jQuery:

$.get('get_title.php',function(*respons*){
    title=*respons* + 'whatever you want'   
    $(document).attr('title',title)
})

Allow a div to cover the whole page instead of the area within the container

Apply a css-reset to reset all the margins and paddings like this

/* http://meyerweb.com/eric/tools/css/reset/

v2.0 | 20110126 License: none (public domain) */

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
display: block;
}
body {
line-height: 1;
}
ol, ul {
list-style: none;
}
blockquote, q {
quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: '';
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}

You can use various css-resets as you need, normal and use in css

 html
 {
  margin: 0px;
 padding: 0px;
 }

body
{
margin: 0px;
padding: 0px;
}

How to initialize struct?

Will "length" ever deviate from the real length of "s". If the answer is no, then you don't need to store length, because strings store their length already, and you can just call s.Length.
To get the syntax you asked for, you can implement an "implicit" operator like so:
```
static implicit operator MyStruct(string s) {
    return new MyStruct(...);
}
```
The implicit operator will work, regardless of whether you make your struct mutable or not.

How to switch between frames in Selenium WebDriver using Java

There is also possibility to use WebDriverWait with ExpectedConditions (to make sure that Frame will be available).

With string as parameter

(new WebDriverWait(driver, 5)).until(ExpectedConditions.frameToBeAvailableAndSwitchToIt("frame-name"));

With locator as a parameter

(new WebDriverWait(driver, 5)).until(ExpectedConditions.frameToBeAvailableAndSwitchToIt(By.id("frame-id")));

More info can be found here

Why are static variables considered evil?

Static variables are generally considered bad because they represent global state and are therefore much more difficult to reason about. In particular, they break the assumptions of object-oriented programming. In object-oriented programming, each object has its own state, represented by instance (non-static) variables. Static variables represent state across instances which can be much more difficult to unit test. This is mainly because it is more difficult to isolate changes to static variables to a single test.

That being said, it is important to make a distinction between regular static variables (generally considered bad), and final static variables (AKA constants; not so bad).

Wait until an HTML5 video loads

You don't really need jQuery for this as there is a Media API that provides you with all you need.

var video = document.getElementById('myVideo');
video.src = 'my_video_' + value + '.ogg';
video.load();

The Media API also contains a load() method which: "Causes the element to reset and start selecting and loading a new media resource from scratch."

(Ogg isn't the best format to use, as it's only supported by a limited number of browsers. I'd suggest using WebM and MP4 to cover all major browsers - you can use the canPlayType() function to decide on which one to play).

You can then wait for either the loadedmetadata or loadeddata (depending on what you want) events to fire:

video.addEventListener('loadeddata', function() {
   // Video is loaded and can be played
}, false);

Negation in Python

try instead:

if not os.path.exists(pathName):
    do this

An item with the same key has already been added

I found the answer.It was because of the variables. Like int a and string a. there were two variables with the same name.

How to add border radius on table row

The tr element does honor the border-radius. Can use pure html and css, no javascript.

JSFiddle link: http://jsfiddle.net/pflies/zL08hqp1/10/

_x000D_

tr {_x000D_
    border: 0;_x000D_
    display: block;_x000D_
    margin: 5px;_x000D_
}_x000D_
.solid {_x000D_
    border: 2px red solid;_x000D_
    border-radius: 10px;_x000D_
}_x000D_
.dotted {_x000D_
    border: 2px green dotted;_x000D_
    border-radius: 10px;_x000D_
}_x000D_
.dashed {_x000D_
    border: 2px blue dashed;_x000D_
    border-radius: 10px;_x000D_
}_x000D_
_x000D_
td {_x000D_
    padding: 5px;_x000D_
}

_x000D_

<table>_x000D_
    <tr>_x000D_
        <td>01</td>_x000D_
        <td>02</td>_x000D_
        <td>03</td>_x000D_
        <td>04</td>_x000D_
        <td>05</td>_x000D_
        <td>06</td>_x000D_
    </tr>_x000D_
    <tr class='dotted'>_x000D_
        <td>07</td>_x000D_
        <td>08</td>_x000D_
        <td>09</td>_x000D_
        <td>10</td>_x000D_
        <td>11</td>_x000D_
        <td>12</td>_x000D_
    </tr>_x000D_
    <tr class='solid'>_x000D_
        <td>13</td>_x000D_
        <td>14</td>_x000D_
        <td>15</td>_x000D_
        <td>16</td>_x000D_
        <td>17</td>_x000D_
        <td>18</td>_x000D_
    </tr>_x000D_
    <tr class='dotted'>_x000D_
        <td>19</td>_x000D_
        <td>20</td>_x000D_
        <td>21</td>_x000D_
        <td>22</td>_x000D_
        <td>23</td>_x000D_
        <td>24</td>_x000D_
    </tr>_x000D_
    <tr class='dashed'>_x000D_
        <td>25</td>_x000D_
        <td>26</td>_x000D_
        <td>27</td>_x000D_
        <td>28</td>_x000D_
        <td>29</td>_x000D_
        <td>30</td>_x000D_
    </tr>_x000D_
</table>

_x000D_

How to select current date in Hive SQL

According to the LanguageManual, you can use unix_timestamp() to get the "current time stamp using the default time zone." If you need to convert that to something more human-readable, you can use from_unixtime(unix_timestamp()).

Hope that helps.

How to run .jar file by double click on Windows 7 64-bit?

I had this same issue, and searched the internet for a solution and none of the suggestions didn’t not open by double clicking the .jar file.

In my case the reason is I have multiple JDK & JRE versions installed on my computer. Since I am a software developer working with several different versions for different clients I need to use multiple JDKs in my PC (Windows 10 Pro). So I do not want to change the system variables (i.e. JAVA_HOME, JRE_HOME or PATH), instead I use command prompt to run java in user process whenever I wanted to use a different version.

When installing JDK it registers the .jar file association with latest version we installed in the PC. If you right click on the .jar icon and select properties, it will show that file opens with “Java(TM) Platform SE Binary”. If we look at the registry key: HKEY_CLASSES_ROOT\jarfile\shell\open\command, it will point to latest JDK version.

It is not a good idea (sometimes annoying) to change the registry key every time I want to run an app build from a different version.

So in my situation it is impossible to just double click the .jar file to execute it. But instead I found a work around solution myself.

Scenario:

Multiple JDKs (1.7, 1.8, 9.0, 10.0, 11.0, and 12.0)are installed in the PC, so the latest installed was 12.0.

Problem

Want to double click an executable .jar developed using JDK 1.8 and didn’t work

This is my work around solution:

Create a shortcut for the .jar file that you want to open.
Right click the shortcut icon and select properties -> Shortcut tab
Change the text in the target (for example "D:\Dev\JavaApp1.8.jar") To

"C:\Program Files\Java\jdk1.8.0\bin\javaw.exe" -jar "D:\Dev\JavaApp1.8.jar"
Then click ok Double click the shortcut.

It should now open the app.

How to add extension methods to Enums

we have just made an enum extension for c# https://github.com/simonmau/enum_ext

It's just a implementation for the typesafeenum, but it works great so we made a package to share - have fun with it

public sealed class Weekday : TypeSafeNameEnum<Weekday, int>
{
    public static readonly Weekday Monday = new Weekday(1, "--Monday--");
    public static readonly Weekday Tuesday = new Weekday(2, "--Tuesday--");
    public static readonly Weekday Wednesday = new Weekday(3, "--Wednesday--");
    ....

    private Weekday(int id, string name) : base(id, name)
    {
    }

    public string AppendName(string input)
    {
        return $"{Name} {input}";
    }
}

I know the example is kind of useless, but you get the idea ;)

Programs & Examples On #Event triggers

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Explanation

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Example of the Issue:

Solution to the Issue

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Change icon on click (toggle)

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