Programs & Examples On #Sprite sheet

A spritesheet is a large image filled with smaller images. When you display each of the smaller images in the correct order, you get an animation. If you imagine an old celluloid movie reel, unrolled, chopped up, and laid out in a large square, you have the idea of a sprite sheet. An example of a sprite sheet can be seen here http://gamemedia.wcgame.ru/game-sprite-sheet.html

npm WARN ... requires a peer of ... but none is installed. You must install peer dependencies yourself

You need to only depend on one major version of angular, so update all modules depending on angular 2.x :

  • update @angular/flex-layout to ^2.0.0-beta.9
  • update @angular/material to ^2.0.0-beta.12
  • update angularfire2 to ^4.0.0-rc.2
  • update zone.js to ^0.8.18
  • update webpack to ^3.8.1
  • add @angular/[email protected] (required for @angular/material)
  • replace angular2-google-maps by @agm/[email protected] (new name)

Using Caps Lock as Esc in Mac OS X

You can also use DoubleCommand to remap this, and other keys.

IIRC, it will map Caps Lock to Esc.

How to make Bitmap compress without change the bitmap size?

Here's a short means I used to reduce the size of Images that have a high byteCount (basically pixels)

fun resizeImage(image: Bitmap): Bitmap {

    val width = image.width
    val height = image.height

    val scaleWidth = width / 10
    val scaleHeight = height / 10

    if (image.byteCount <= 1000000)
        return image

    return Bitmap.createScaledBitmap(image, scaleWidth, scaleHeight, false)
}

This returns a scaled Bitmap that is over 10 times smaller than the Bitmap passed as a parameter. Might not be the most ideal solution but it works.

How to log SQL statements in Spring Boot?

This works for me (YAML):

spring:
  jpa:
    properties:
      hibernate:
        show_sql: true
        format_sql: true
logging:
  level:
    org:
      hibernate:
        type: trace

Set color of TextView span in Android

If you want more control, you might want to check the TextPaint class. Here is how to use it:

final ClickableSpan clickableSpan = new ClickableSpan() {
    @Override
    public void onClick(final View textView) {
        //Your onClick code here
    }

    @Override
    public void updateDrawState(final TextPaint textPaint) {
        textPaint.setColor(yourContext.getResources().getColor(R.color.orange));
        textPaint.setUnderlineText(true);
    }
};

How can I fix the form size in a C# Windows Forms application and not to let user change its size?

Check this:

// Define the border style of the form to a dialog box.
form1.FormBorderStyle = FormBorderStyle.FixedDialog;

// Set the MaximizeBox to false to remove the maximize box.
form1.MaximizeBox = false;

// Set the MinimizeBox to false to remove the minimize box.
form1.MinimizeBox = false;

// Set the start position of the form to the center of the screen.
form1.StartPosition = FormStartPosition.CenterScreen;

// Display the form as a modal dialog box.
form1.ShowDialog();

How to add a new schema to sql server 2008?

You can try this:

use database
go

declare @temp as int
select @temp = count(1) from sys.schemas where name = 'newSchema'

if @temp = 0 
begin
    exec ('create SCHEMA temporal')
    print 'The schema newSchema was created in database'
end 
else 
print 'The schema newSchema already exists in database'
go

Unit tests vs Functional tests

Unit Test:- Unit testing is particularly used to test the product component by component specially while the product is under development. Junit and Nunit type of tools will also help you to test the product as per the Unit. **Rather than solving the issues after the Integration it is always comfortable to get it resolved early in the development.

Functional Testing:- As for as the Testing is concerned there are two main types of Testing as 1.Functional Test 2.Non-Functional Test.

Non-Functional Test is a test where a Tester will test that The product will perform all those quality attributes that customer doesn't mention but those quality attributes should be there. Like:-Performance,Usability,Security,Load,Stress etc. but in the Functional Test:- The customer is already present with his requirements and those are properly documented,The testers task is to Cross check that whether the Application Functionality is performing according to the Proposed System or not. For that purpose Tester should test for the Implemented functionality with the proposed System.

Why isn't textarea an input[type="textarea"]?

I realize this is an older post, but thought this might be helpful to anyone wondering the same question:

While the previous answers are no doubt valid, there is a more simple reason for the distinction between textarea and input.

As mentioned previously, HTML is used to describe and give as much semantic structure to web content as possible, including input forms. A textarea may be used for input, however a textarea can also be marked as read only via the readonly attribute. The existence of such an attribute would not make any sense for an input type, and thus the distinction.

Refresh Page and Keep Scroll Position

UPDATE

You can use document.location.reload(true) as mentioned below instead of the forced trick below.

Replace your HTML with this:

<!DOCTYPE html>
<html>
    <head>
        <style type="text/css">
            body { 
                background-image: url('../Images/Black-BackGround.gif');
                background-repeat: repeat;
            }
            body td {
               font-Family: Arial; 
               font-size: 12px; 
            }
            #Nav a { 
                position:relative; 
                display:block; 
                text-decoration: none; 
                color:black; 
            }
        </style>
        <script type="text/javascript">
            function refreshPage () {
                var page_y = document.getElementsByTagName("body")[0].scrollTop;
                window.location.href = window.location.href.split('?')[0] + '?page_y=' + page_y;
            }
            window.onload = function () {
                setTimeout(refreshPage, 35000);
                if ( window.location.href.indexOf('page_y') != -1 ) {
                    var match = window.location.href.split('?')[1].split("&")[0].split("=");
                    document.getElementsByTagName("body")[0].scrollTop = match[1];
                }
            }
        </script>
    </head>
    <body><!-- BODY CONTENT HERE --></body>
</html>

check android application is in foreground or not?

I have tried with package filter from running process. but that is very weird. Instead of that, I have try new solution and this work perfectly. I have checked many times and getting perfect result through this module.

private int numRunningActivities = 0;

 public void onCreate() {
        super.onCreate();
this.registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {

                @Override
                public void onActivityStarted(Activity activity) {
                    numRunningActivities++;
                    if (numRunningActivities == 1) {
                        LogUtils.d("APPLICATION", "APP IN FOREGROUND");
                    }

                }

                @Override
                public void onActivityStopped(Activity activity) {

                    numRunningActivities--;
                    if (numRunningActivities == 0) {
                       Log.e("", "App is in BACKGROUND") 
                    }
                }


                @Override
                public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
                }

                @Override
                public void onActivityResumed(Activity activity) {
                }

                @Override
                public void onActivityPaused(Activity activity) {
                }

                @Override
                public void onActivityDestroyed(Activity activity) {
                }

                @Override
                public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
                }
            });
}

How to close a JavaFX application on window close?

You MUST override the "stop()" method in your Application instance to make it works. If you have overridden even empty "stop()" then the application shuts down gracefully after the last stage is closed (actually the last stage must be the primary stage to make it works completely as in supposed to be). No any additional Platform.exit or setOnCloseRequest calls are need in such case.

Can I style an image's ALT text with CSS?

In Firefox and Chrome (and possibly more) we can insert the string ‘( .... )’ into the alt text of an image that hasn’t loaded.

_x000D_
_x000D_
img {_x000D_
  font-style: italic;_x000D_
  color: #c00;_x000D_
}_x000D_
_x000D_
img:after {_x000D_
  content: " (Image - Right click to reload if not loaded)";_x000D_
}_x000D_
_x000D_
img::after {_x000D_
  content: " (Image - Right click to reload if not loaded)";_x000D_
}
_x000D_
<img alt="Alt text - " />
_x000D_
_x000D_
_x000D_

Explode PHP string by new line

Losing line breaks from posting from input textboxes?
What works faster for me is to copy paste any text or Excel or HTML table type or newline type of data and paste it into a textarea instead of an inputextbox: this keeps the linebreaks intact in the POST.

 <textarea  id="txtArea" name="txtArea" rows="40" cols="170"></textarea>
 <br>
 <input type="submit" value="split lines into array" /> 

in the form receiving file:

 $txtArea ='';  
 $txtArea = $_POST['txtArea'];  
 $TA = $_POST['txtArea'];  
 $string = $TA;  
 $array = preg_split ('/$\R?^/m', $string); 
// or any of these: 
// $array = explode(PHP_EOL,$string);  
// $array = explode("\n", $txtArea); 
 echo "<br>A0: ".$array[0];
 echo "<br>A1: ".@$array[1];
 echo "<br>A2: ".@$array[2];

Disable Logback in SpringBoot

In my case, it was only required to exclude the spring-boot-starter-logging artifact from the spring-boot-starter-security one.

This is in a newly generated spring boot 2.2.6.RELEASE project including the following dependencies:

  • spring-boot-starter-security
  • spring-boot-starter-validation
  • spring-boot-starter-web
  • spring-boot-starter-test

I found out by running mvn dependency:tree and looking for ch.qos.logback.

The spring boot related <dependencies> in my pom.xml looks like this:

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>           
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-log4j2</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-test</artifactId>
        <scope>test</scope>
    </dependency>



</dependencies>

Show Console in Windows Application?

Resurrecting a very old thread yet again, since none of the answers here worked very well for me.

I found a simple way that seems pretty robust and simple. It worked for me. The idea:

  • Compile your project as a Windows Application. There might be a parent console when your executable starts, but maybe not. The goal is to re-use the existing console if one exists, or create a new one if not.
  • AttachConsole(-1) will look for the console of the parent process. If there is one, it attaches to it and you're finished. (I tried this and it worked properly when calling my application from cmd)
  • If AttachConsole returned false, there is no parent console. Create one with AllocConsole.

Example:

static class Program
{
    [DllImport( "kernel32.dll", SetLastError = true )]
    static extern bool AllocConsole();

    [DllImport( "kernel32", SetLastError = true )]
    static extern bool AttachConsole( int dwProcessId );

    static void Main(string[] args)
    {
        bool consoleMode = Boolean.Parse(args[0]);
        if (consoleMode)
        {
           if (!AttachConsole(-1))
              AllocConsole();
           Console.WriteLine("consolemode started");
           // ...
        } 
        else
        {
           Application.EnableVisualStyles();
           Application.SetCompatibleTextRenderingDefault(false);
           Application.Run(new Form1());
        }
    }
}

A word of caution : it seems that if you try writing to the console prior to attaching or allocing a console, this approach doesn't work. My guess is the first time you call Console.Write/WriteLine, if there isn't already a console then Windows automatically creates a hidden console somewhere for you. (So perhaps Anthony's ShowConsoleWindow answer is better after you've already written to the console, and my answer is better if you've not yet written to the console). The important thing to note is that this doesn't work:

static void Main(string[] args)
    {
        Console.WriteLine("Welcome to the program");   //< this ruins everything
        bool consoleMode = Boolean.Parse(args[0]);
        if (consoleMode)
        {
           if (!AttachConsole(-1))
              AllocConsole();
           Console.WriteLine("consolemode started");   //< this doesn't get displayed on the parent console
           // ...
        } 
        else
        {
           Application.EnableVisualStyles();
           Application.SetCompatibleTextRenderingDefault(false);
           Application.Run(new Form1());
        }
    }

Can we install Android OS on any Windows Phone and vice versa, and same with iPhone and vice versa?

Ok, For installing Android on Windows phone, I think you can..(But your window phone has required configuration to run Android) (For other I don't know If I will then surely post here)

Just go through these links,

Run Android on Your Windows Mobile Phone

full tutorial on how to put android on windows mobile touch pro 2

How to install Android on most Windows Mobile phones

Update:

For Windows 7 to Android device, this also possible, (You need to do some hack for this)

Just go through these links,

Install Windows Phone 7 Mango on HTC HD2 [How-To Guide]

HTC HD2: How To Install WP7 (Windows Phone 7) & MAGLDR 1.13 To NAND

Install windows phone 7 on android and iphones | Tips and Tricks

How to install Windows Phone 7 on HTC HD2? (Video)


To Install Android on your iOS Devices (This also possible...)

Look at How To Install Android on your iOS Devices

Android 2.2 Froyo running on Iphone

How do you force Visual Studio to regenerate the .designer files for aspx/ascx files?

Well I found a solution that works, though I don't really like it. I had to delete the .designer.cs file then recreate an empty file with the same name. When I went back in and saved the aspx file again, the designer file was re-generated.

Dodgy!

Best Way to Refresh Adapter/ListView on Android

If nothing works, just create the adapter instance again with the new set of results or the updated set of results. Then you can see the new view.

XYZAdapter adbXzy = new XYZAdapter(context, 0, listData);
xyzListView.setAdapter(adbXzy);

adbXzy.notifyDataSetChanged();

Return JSON response from Flask view

If you don't want to use jsonify for some reason, you can do what it does manually. Call flask.json.dumps to create JSON data, then return a response with the application/json content type.

from flask import json

@app.route('/summary')
def summary():
    data = make_summary()
    response = app.response_class(
        response=json.dumps(data),
        mimetype='application/json'
    )
    return response

flask.json is distinct from the built-in json module. It will use the faster simplejson module if available, and enables various integrations with your Flask app.

How do I recursively delete a directory and its entire contents (files + sub dirs) in PHP?

Once you finish running tests , just remove # from the #unlink and #rmdir in the class .

<?php 
class RMRFiles {

        function __construct(){
        }

    public function recScan( $mainDir, $allData = array() )
    {

    // hide files
    $hidefiles = array(
    ".",
    "..") ;

    //start reading directory
    $dirContent = scandir( $mainDir ) ;

        //cycle through
        foreach ( $dirContent as $key => $content )
        {
            $path = $mainDir . '/' . $content ;

            // if is readable / file
            if ( ! in_array( $content, $hidefiles ) )
            {
            if ( is_file( $path ) && is_readable( $path ) )
            {
            #delete files within directory
            #unlink($path);
            $allData['unlink'][] = $path ;
            }

            // if is readable / directory
            else
            if ( is_dir( $path ) && is_readable( $path ) )
            {
            /*recursive*/
            $allData = $this->recScan( $path, $allData ) ;

            #finally remove directory
            $allData['rmdir'][]=$path;
            #rmdir($path);
            }
            }
        }

    return $allData ;

    }

}

header("Content-Type: text/plain");

/* Get absolute path of the running script 
Ex : /home/user/public_html/   */
define('ABPATH', dirname(__file__) . '/'); 

/* The folder where we store cache files 
Ex: /home/user/public_html/var/cache   */
define('STOREDIR','var/cache'); 

$rmrf = new RMRFiles();
#here we delete folder content files & directories
print_r($rmrf->recScan(ABPATH.STOREDIR));
#finally delete scanned directory ? 
#rmdir(ABPATH.STOREDIR);

?>

How to find patterns across multiple lines using grep?

As an alternative to Balu Mohan's answer, it is possible to enforce the order of the patterns using only grep, head and tail:

for f in FILEGLOB; do tail $f -n +$(grep -n "pattern1" $f | head -n1 | cut -d : -f 1) 2>/dev/null | grep "pattern2" &>/dev/null && echo $f; done

This one isn't very pretty, though. Formatted more readably:

for f in FILEGLOB; do
    tail $f -n +$(grep -n "pattern1" $f | head -n1 | cut -d : -f 1) 2>/dev/null \
    | grep -q "pattern2" \
    && echo $f
done

This will print the names of all files where "pattern2" appears after "pattern1", or where both appear on the same line:

$ echo "abc
def" > a.txt
$ echo "def
abc" > b.txt
$ echo "abcdef" > c.txt; echo "defabc" > d.txt
$ for f in *.txt; do tail $f -n +$(grep -n "abc" $f | head -n1 | cut -d : -f 1) 2>/dev/null | grep -q "def" && echo $f; done
a.txt
c.txt
d.txt

Explanation

  • tail -n +i - print all lines after the ith, inclusive
  • grep -n - prepend matching lines with their line numbers
  • head -n1 - print only the first row
  • cut -d : -f 1 - print the first cut column using : as the delimiter
  • 2>/dev/null - silence tail error output that occurs if the $() expression returns empty
  • grep -q - silence grep and return immediately if a match is found, since we are only interested in the exit code

Why and when to use angular.copy? (Deep Copy)

Javascript passes variables by reference, this means that:

var i = [];
var j = i;
i.push( 1 );

Now because of by reference part i is [1], and j is [1] as well, even though only i was changed. This is because when we say j = i javascript doesn't copy the i variable and assign it to j but references i variable through j.

Angular copy lets us lose this reference, which means:

var i = [];
var j = angular.copy( i );
i.push( 1 );

Now i here equals to [1], while j still equals to [].

There are situations when such kind of copy functionality is very handy.

How do I fix a Git detached head?

HEAD is a pointer, and it points — directly or indirectly — to a particular commit:

Attached  HEAD means that it is attached to some branch (i.e. it points to a branch).
Detached HEAD means that it is not attached to any branch, i.e. it points directly to some commit.

enter image description here

In other words:

  • If it points to a commit directly, the HEAD is detached.
  • If it points to a commit indirectly, (i.e. it points to a branch, which in turn points to a commit), the HEAD is attached.

To better understand situations with attached / detached HEAD, let's show the steps leading to the quadruplet of pictures above.

We begin with the same state of the repository (pictures in all quadrants are the same):

enter image description here


Now we want to perform git checkout — with different targets in the individual pictures (commands on top of them are dimmed to emphasize that we are only going to apply those commands):

enter image description here


This is the situation after performing those commands:

enter image description here

As you can see, the HEAD points to the target of the git checkout command — to a branch (first 3 images of the quadruplet), or (directly) to a commit (the last image of the quadruplet).

The content of the working directory is changed, too, to be in accordance with the appropriate commit (snapshot), i.e. with the commit pointed (directly or indirectly) by the HEAD.


So now we are in the same situation as in the start of this answer:

enter image description here

How to delete Certain Characters in a excel 2010 cell

Replace [ with nothing, then ] with nothing.

How to delete an SMS from the inbox in Android programmatically?

Using suggestions from others, I think I got it to work:

(using SDK v1 R2)

It's not perfect, since i need to delete the entire conversation, but for our purposes, it's a sufficient compromise as we will at least know all messages will be looked at and verified. Our flow will probably need to then listen for the message, capture for the message we want, do a query to get the thread_id of the recently inbounded message and do the delete() call.

In our Activity:

Uri uriSms = Uri.parse("content://sms/inbox");
Cursor c = getContentResolver().query(uriSms, null,null,null,null); 
int id = c.getInt(0);
int thread_id = c.getInt(1); //get the thread_id
getContentResolver().delete(Uri.parse("content://sms/conversations/" + thread_id),null,null);

Note: I wasn't able to do a delete on content://sms/inbox/ or content://sms/all/

Looks like the thread takes precedence, which makes sense, but the error message only emboldened me to be angrier. When trying the delete on sms/inbox/ or sms/all/, you will probably get:

java.lang.IllegalArgumentException: Unknown URL
    at com.android.providers.telephony.SmsProvider.delete(SmsProvider.java:510)
    at android.content.ContentProvider$Transport.delete(ContentProvider.java:149)
    at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:149)

For additional reference too, make sure to put this into your manifest for your intent receiver:

<receiver android:name=".intent.MySmsReceiver">
    <intent-filter>
        <action android:name="android.provider.Telephony.SMS_RECEIVED"></action>
    </intent-filter>
</receiver>

Note the receiver tag does not look like this:

<receiver android:name=".intent.MySmsReceiver" 
    android:permission="android.permission.RECEIVE_SMS">

When I had those settings, android gave me some crazy permissions exceptions that didn't allow android.phone to hand off the received SMS to my intent. So, DO NOT put that RECEIVE_SMS permission attribute in your intent! Hopefully someone wiser than me can tell me why that was the case.

How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?

For entity Framework Core 2.0 or above, the correct way to do this is:

var firstName = "John";
var id = 12;
ctx.Database.ExecuteSqlCommand($"Update [User] SET FirstName = {firstName} WHERE Id = {id}";

Note that Entity Framework will produce the two parameters for you, so you are protected from Sql Injection.

Also note that it is NOT:

var firstName = "John";
var id = 12;
var sql = $"Update [User] SET FirstName = {firstName} WHERE Id = {id}";
ctx.Database.ExecuteSqlCommand(sql);

because this does NOT protect you from Sql Injection, and no parameters are produced.

See this for more.

How to display and hide a div with CSS?

To hide an element, use:

display: none;
visibility: hidden;

To show an element, use:

display: block;
visibility: visible;

The difference is:

Visibility handles the visibility of the tag, the display handles space it occupies on the page.

If you set the visibility and do not change the display, even if the tags are not seen, it still occupies space.

What is the most efficient way to concatenate N arrays?

Shorten with ES6.

new Set([].concat(...Array));

This does concat and unique the multiple arrays;

Demo on codepen

How to Convert Boolean to String

Edited based on @sebastian-norr suggestion pointing out that the $bool variable may or may not be a true 0 or 1. For example, 2 resolves to true when running it through a Boolean test in PHP.

As a solution, I have used type casting to ensure that we convert $bool to 0 or 1.
But I have to admit that the simple expression $bool ? 'true' : 'false' is way cleaner.

My solution used below should never be used, LOL.
Here is why not...

To avoid repetition, the array containing the string representation of the Boolean can be stored in a constant that can be made available throughout the application.

// Make this constant available everywhere in the application
const BOOLEANS = ['true', 'false'];

$bool = true;
echo BOOLEANS[(bool)  $bool]; // 'true'
echo BOOLEANS[(bool) !$bool]; // 'false'

AngularJs directive not updating another directive's scope

Just wondering why you are using 2 directives?

It seems like, in this case it would be more straightforward to have a controller as the parent - handle adding the data from your service to its $scope, and pass the model you need from there into your warrantyDirective.

Or for that matter, you could use 0 directives to achieve the same result. (ie. move all functionality out of the separate directives and into a single controller).

It doesn't look like you're doing any explicit DOM transformation here, so in this case, perhaps using 2 directives is overcomplicating things.

Alternatively, have a look at the Angular documentation for directives: http://docs.angularjs.org/guide/directive The very last example at the bottom of the page explains how to wire up dependent directives.

React Native: Possible unhandled promise rejection

In My case, I am running a local Django backend in IP 127.0.0.1:8000 with Expo start. Just make sure you have the server in public domain not hosted lcoally on your machine

Encrypt and decrypt a password in Java

EDIT : this answer is old. Usage of MD5 is now discouraged as it can easily be broken.


MD5 must be good enough for you I imagine? You can achieve it with MessageDigest.

MessageDigest.getInstance("MD5");

There are also other algorithms listed here.

And here's an third party version of it, if you really want: Fast MD5

How to convert a JSON string to a dictionary?

let JSONData = jsonString.data(using: .utf8)!

let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableLeaves)

guard let userDictionary = jsonResult as? Dictionary<String, AnyObject> else {
            throw NSError()}

The multi-part identifier could not be bound

Did you forget to join some tables? If not then you probably need to use some aliases.

How to display gpg key details without importing it?

I seem to be able to get along with simply:

$gpg <path_to_file>

Which outputs like this:

$ gpg /tmp/keys/something.asc 
  pub  1024D/560C6C26 2014-11-26 Something <[email protected]>
  sub  2048g/0C1ACCA6 2014-11-26

The op didn't specify in particular what key info is relevant. This output is all I care about.

Sockets - How to find out what port and address I'm assigned

The comment in your code is wrong. INADDR_ANY doesn't put server's IP automatically'. It essentially puts 0.0.0.0, for the reasons explained in mark4o's answer.

What is the default username and password in Tomcat?

For Window 7, Netbeans 8.0.2 , Apache Tomcat 8.0.15
C:\Users\JONATHAN\AppData\Roaming\NetBeans\8.0.2\apache-tomcat-8.0.15.0_base\conf\tomcat-users.xml
The Tomcat Manager Username and password is like below pic..
tomcat-users.xml

How do I scroll the UIScrollView when the keyboard appears?

Apple's recommendation recoded in Swift + Using UIScrollView with Auto Layout in iOS (basing on these following links: link 1, link 2, link 3):

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet var t1: UITextField!
    @IBOutlet var t2: UITextField!
    @IBOutlet var t3: UITextField!
    @IBOutlet var t4: UITextField!

    @IBOutlet var srcScrollView: UIScrollView!

    @IBOutlet var contentView: UIView!

    var contentViewCoordinates: CGPoint!

    override func viewDidLoad() {

        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        /* Constraints on content view */
        let leftConstraint = NSLayoutConstraint(item:self.contentView,
            attribute:NSLayoutAttribute.Leading,
            relatedBy:NSLayoutRelation.Equal,
            toItem:self.view,
            attribute:NSLayoutAttribute.Left,
            multiplier:1.0,
            constant:0)
        self.view.addConstraint(leftConstraint)

        let rightConstraint = NSLayoutConstraint(item:self.contentView,
            attribute:NSLayoutAttribute.Trailing,
            relatedBy:NSLayoutRelation.Equal,
            toItem:self.view,
            attribute:NSLayoutAttribute.Right,
            multiplier:1.0,
            constant:0)
        self.view.addConstraint(rightConstraint)

        /* Tap gesture */
        let tapGesture: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "hideKeyboard")
        // prevents the scroll view from swallowing up the touch event of child buttons
        tapGesture.cancelsTouchesInView = false
        srcScrollView.addGestureRecognizer(tapGesture)

        /* Save content view coordinates */
        contentViewCoordinates = contentView.frame.origin
    }

    func hideKeyboard() {
        t1.resignFirstResponder()
        t2.resignFirstResponder()
        t3.resignFirstResponder()
        t4.resignFirstResponder()
    }

    var activeField: UITextField?

    func textFieldDidBeginEditing(textField: UITextField) {
        activeField = textField
    }

    func textFieldDidEndEditing(textField: UITextField) {
        activeField = nil
    }

    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        let center = NSNotificationCenter.defaultCenter()
        center.addObserver(self, selector: "keyboardOnScreen:", name: UIKeyboardDidShowNotification, object: nil)
        center.addObserver(self, selector: "keyboardOffScreen:", name: UIKeyboardDidHideNotification, object: nil)
    }

    func keyboardOnScreen(notification: NSNotification){
        // Retrieve the size and top margin (inset is the fancy word used by Apple) 
        // of the keyboard displayed.
        let info: NSDictionary  = notification.userInfo!
        let kbSize = info.valueForKey(UIKeyboardFrameEndUserInfoKey)?.CGRectValue().size
        let contentInsets: UIEdgeInsets  = UIEdgeInsetsMake(0.0, 0.0, kbSize!.height, 0.0)

        srcScrollView.contentInset = contentInsets
        srcScrollView.scrollIndicatorInsets = contentInsets

        var aRect: CGRect = self.view.frame
        aRect.size.height -= kbSize!.height
        //you may not need to scroll, see if the active field is already visible
        if (CGRectContainsPoint(aRect, activeField!.frame.origin) == false) {
            let scrollPoint:CGPoint = CGPointMake(0.0, activeField!.frame.origin.y - kbSize!.height)
            srcScrollView.setContentOffset(scrollPoint, animated: true)
        }
    }

//    func keyboardOnScreen(aNotification: NSNotification) {
//        let info: NSDictionary  = aNotification.userInfo!
//        let kbSize = info.valueForKey(UIKeyboardFrameEndUserInfoKey)?.CGRectValue().size
//        
//        var bkgndRect: CGRect! = activeField?.superview?.frame
//        
//        bkgndRect.size.height += kbSize!.height
//        
//        activeField?.superview?.frame = bkgndRect
//        
//        srcScrollView.setContentOffset(CGPointMake(0.0, activeField!.frame.origin.y - kbSize!.height), animated: true)
//    }

    func keyboardOffScreen(notification: NSNotification){
        let contentInsets:UIEdgeInsets = UIEdgeInsetsZero

        srcScrollView.contentInset = contentInsets
        srcScrollView.scrollIndicatorInsets = contentInsets

        self.srcScrollView.setContentOffset(CGPointMake(0, -self.view.frame.origin.y/2), animated: true)
    }

}

How can I perform a reverse string search in Excel without using VBA?

This is very clean and compact, and works well.

{=RIGHT(A1,LEN(A1)-MAX(IF(MID(A1,ROW(1:999),1)=" ",ROW(1:999),0)))}

It does not error trap for no spaces or one word, but that's easy to add.

Edit:
This handles trailing spaces, single word, and empty cell scenarios. I have not found a way to break it.

{=RIGHT(TRIM(A1),LEN(TRIM(A1))-MAX(IF(MID(TRIM(A1),ROW($1:$999),1)=" ",ROW($1:$999),0)))}

Send json post using php

use CURL luke :) seriously, thats one of the best ways to do it AND you get the response.

How do I rename all folders and files to lowercase on Linux?

None of the solutions here worked for me because I was on a system that didn't have access to the perl rename script, plus some of the files included spaces. However, I found a variant that works:

find . -depth -exec sh -c '
    t=${0%/*}/$(printf %s "${0##*/}" | tr "[:upper:]" "[:lower:]");
    [ "$t" = "$0" ] || mv -i "$0" "$t"
' {} \;

Credit goes to "Gilles 'SO- stop being evil'", see this answer on the similar question "change entire directory tree to lower-case names" on the Unix & Linux StackExchange.

How to concatenate columns in a Postgres SELECT?

PHP's Laravel framework, I am using search first_name, last_name Fields consider like Full Name Search

Using || symbol Or concat_ws(), concat() methods

$names = str_replace(" ", "", $searchKey);                               
$customers = Customer::where('organization_id',$this->user->organization_id)
             ->where(function ($q) use ($searchKey, $names) {
                 $q->orWhere('phone_number', 'ilike', "%{$searchKey}%"); 
                 $q->orWhere('email', 'ilike', "%{$searchKey}%");
                 $q->orWhereRaw('(first_name || last_name) LIKE ? ', '%' . $names. '%');
    })->orderBy('created_at','desc')->paginate(20);

This worked charm!!!

Cannot use Server.MapPath

System.Web.HttpContext.Current.Server.MapPath("~/") gives null if we call it from a thread.

So, Try to use

System.Web.Hosting.HostingEnvironment.MapPath("~/")

Total number of items defined in an enum

If you find yourself writing the above solution as often as I do then you could implement it as a generic:

public static int GetEnumEntries<T>() where T : struct, IConvertible 
{
    if (!typeof(T).IsEnum)
        throw new ArgumentException("T must be an enumerated type");

    return Enum.GetNames(typeof(T)).Length;
}

How do I automatically scroll to the bottom of a multiline text box?

I use a function for this :

private void Log (string s) {
    TB1.AppendText(Environment.NewLine + s);
    TB1.ScrollToCaret();
}

Angular2 - Radio Button Binding

This may be not the correct solution but this one is also option hope it will help someone.

Till now i had getting the value of radioButtons using (click) method like following:

<input type="radio" name="options" #male (click)="onChange(male.value)">Male
<input type="radio" name="options" #female (click)="onChange(female.value)">Female

and in the .ts file i have set the value of predefined variable to getter value of onChange function.

But after searching i found good method i have't tried yet but it seems this one is good using [(ng-model)] link is here to github here. this is using RadioControlValueAccessor for the radio as well as checkbox too. here is the working #plnkr# for this method here .

HTTP Error 403.14 - Forbidden - The Web server is configured to not list the contents of this directory

This could happen for any number of reasons. If you have tried through all of the above and still getting the same error, I have one more solution.

Another reason this could happen is that

  1. If you have the same code base running before you started to run the fresh solution, you might encounter this error. The reason is that IIS Express is trying to run on the same port as it was for the old solution which has the physical path registered for the application start URL.
  2. Since the IIS cannot figure out the physical path to run the solution, it might not be able to locate all the dlls required to start the application.

Solutions:

  1. Try to change the application port to default. For example., Use http://localhost/ instead of http://localhost:25836/

  2. Try changing to any other port if you have already used the default port for the previous application. ex: http://localhost:25364/ instead of http://localhost/

This will allow the IIS/IIS Express to point to the default bin path of the newer application you are trying to run which will have all the required dlls to start the application.

What is the PostgreSQL equivalent for ISNULL()

SELECT CASE WHEN field IS NULL THEN 'Empty' ELSE field END AS field_alias

Or more idiomatic:

SELECT coalesce(field, 'Empty') AS field_alias

What is the difference between const and readonly in C#?

This explains it. Summary: const must be initialized at declaration time, readonly can be initialized on the constructor (and thus have a different value depending on the constructor used).

EDIT: See Gishu's gotcha above for the subtle difference

What is the documents directory (NSDocumentDirectory)?

This has changed in iOS 8. See the following tech note: https://developer.apple.com/library/ios/technotes/tn2406/_index.html

The Apple sanctioned way (from the link above) is as follows:

// Returns the URL to the application's Documents directory.
- (NSURL *)applicationDocumentsDirectory
{
    return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}

How to convert .pem into .key?

openssl rsa -in privkey.pem -out private.key does the job.

importing external ".txt" file in python

Import gives you access to other modules in your program. You can't decide to import a text file. If you want to read from a file that's in the same directory, you can look at this. Here's another StackOverflow post about it.

are there dictionaries in javascript like python?

I realize this is an old question, but it pops up in Google when you search for 'javascript dictionaries', so I'd like to add to the above answers that in ECMAScript 6, the official Map object has been introduced, which is a dictionary implementation:

var dict = new Map();
dict.set("foo", "bar");

//returns "bar"
dict.get("foo");

Unlike javascript's normal objects, it allows any object as a key:

var foo = {};
var bar = {};
var dict = new Map();
dict.set(foo, "Foo");
dict.set(bar, "Bar");

//returns "Bar"
dict.get(bar);

//returns "Foo"
dict.get(foo);

//returns undefined, as {} !== foo and {} !== bar
dict.get({});

Python open() gives FileNotFoundError/IOError: Errno 2 No such file or directory

Most likely, the problem is that you're using a relative file path to open the file, but the current working directory isn't set to what you think it is.

It's a common misconception that relative paths are relative to the location of the python script, but this is untrue. Relative file paths are always relative to the current working directory, and the current working directory doesn't have to be the location of your python script.

You have three options:

  • Use an absolute path to open the file:

    file = open(r'C:\path\to\your\file.yaml')
    
  • Generate the path to the file relative to your python script:

    from pathlib import Path
    
    script_location = Path(__file__).absolute().parent
    file_location = script_location / 'file.yaml'
    file = file_location.open()
    

    (See also: How do I get the path and name of the file that is currently executing?)

  • Change the current working directory before opening the file:

    import os
    
    os.chdir(r'C:\path\to\your\file')
    file = open('file.yaml')
    

Other common mistakes that could cause a "file not found" error include:

  • Accidentally using escape sequences in a file path:

    path = 'C:\Users\newton\file.yaml'
    # Incorrect! The '\n' in 'Users\newton' is a line break character!
    

    To avoid making this mistake, remember to use raw string literals for file paths:

    path = r'C:\Users\newton\file.yaml'
    # Correct!
    

    (See also: Windows path in Python)

  • Forgetting that Windows doesn't display file extensions:

    Since Windows doesn't display known file extensions, sometimes when you think your file is named file.yaml, it's actually named file.yaml.yaml. Double-check your file's extension.

Quicker way to get all unique values of a column in VBA?

Try this

Option Explicit

Sub UniqueValues()
Dim ws As Worksheet
Dim uniqueRng As Range
Dim myCol As Long

myCol = 5 '<== set it as per your needs
Set ws = ThisWorkbook.Worksheets("unique") '<== set it as per your needs

Set uniqueRng = GetUniqueValues(ws, myCol)

End Sub


Function GetUniqueValues(ws As Worksheet, col As Long) As Range
Dim firstRow As Long

With ws
    .Columns(col).RemoveDuplicates Columns:=Array(1), header:=xlNo

    firstRow = 1
    If IsEmpty(.Cells(1, col)) Then firstRow = .Cells(1, col).End(xlDown).row

    Set GetUniqueValues = Range(.Cells(firstRow, col), .Cells(.Rows.Count, col).End(xlUp))
End With

End Function

it should be quite fast and without the drawback NeepNeepNeep told about

Java, how to compare Strings with String Arrays

I presume you are wanting to check if the array contains a certain value, yes? If so, use the contains method.

if(Arrays.asList(codes).contains(userCode))

Command prompt won't change directory to another drive

The short answer

The correct way to go from C:\...\Adminto D:\Docs\Java drive, is the following command :

cd /d d:\Docs\Java

More details

If you're somewhere random on your D:\ drive, and you want to go to the root of your drive, you can use this command :

cd d:\

If you're somewhere random on your D:\ drive, and you want to go to a specific folder on your drive, you can use this command :

cd d:\Docs\Java

If you're on a different drive, and you want to go to the root of your D:\ drive, you can use this command :

cd /d d:\

If you're on a different drive, and you want to go to a specific folder on your D: drive, you can use this command :

cd /d d:\Docs\Java

If you're on a different drive, and you want to go to the last open folder of you D: drive, you can use this command :

cd /d d:

As a shorthand for cd /d d:, you can also use this command :

d:

How does the bitwise complement operator (~ tilde) work?

As others mentioned ~ just flipped bits (changes one to zero and zero to one) and since two's complement is used you get the result you saw.

One thing to add is why two's complement is used, this is so that the operations on negative numbers will be the same as on positive numbers. Think of -3 as the number to which 3 should be added in order to get zero and you'll see that this number is 1101, remember that binary addition is just like elementary school (decimal) addition only you carry one when you get to two rather than 10.

 1101 +
 0011 // 3
    =
10000
    =
 0000 // lose carry bit because integers have a constant number of bits.

Therefore 1101 is -3, flip the bits you get 0010 which is two.

How to tell if UIViewController's view is visible

Good point that view is appeared if it's already in window hierarchy stack. thus we can extend our classes for this functionality.

extension UIViewController {
  var isViewAppeared: Bool { viewIfLoaded?.isAppeared == true }
}

extension UIView {
  var isAppeared: Bool { window != nil }
}

Diff files present in two different directories

Try this:

diff -rq /path/to/folder1 /path/to/folder2      

__init__() got an unexpected keyword argument 'user'

Check your imports. There could be two classes with the same name. Either from your code or from a library you are using. Personally that was the issue.

how to get current location in google map android

Simple steps to get current location on google map:

1 - create map activity so in onMap ready method you create LocationManager and LocationListener

2 - in onMap ready also you check for android version and user permission ==> if there is a permission give location update OR ask the user for permission

3 - in the main class check for result of permission (onRequestPermissionsResult) ==> if the condition is true so give location update

4 - in (onLocationChanged) method we create LatLng variable and get the coordinates from location then from mMap we (addMarker and moveCamera) for that variable we've just created, this gives us location when the user moves so we still need to create new LatLng in onMap ready to have user's location when the App starts ==>inside condition if there is permission (lastKnownLocation).

NOTE:

1) Do Not forget to ask for permissions (Location and Internet) in Manifest

2) Do Not forget to have Map key from google APIs

3) We used (mMap.clear) to avoid repeating the marker each time we (run the app or update location)

Coding Part:

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    LocationManager locationManager;
    LocationListener locationListener;

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

        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);


    }

    @SuppressLint("MissingPermission")
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        locationManager  = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

        locationListener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {

                mMap.clear();

                LatLng userLocation = new LatLng(location.getLatitude(), location.getLongitude());

                mMap.addMarker(new MarkerOptions().position(userLocation).title("Marker"));

                mMap.moveCamera(CameraUpdateFactory.newLatLng(userLocation));

                Toast.makeText(MapsActivity.this, userLocation.toString(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onStatusChanged(String provider, int status, Bundle extras) {


            }

            @Override
            public void onProviderEnabled(String provider) {

            }

            @Override
            public void onProviderDisabled(String provider) {

            }


        };

        if (Build.VERSION.SDK_INT < 23 ){

            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

        }else if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {

            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

            Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

            LatLng userLocation = new LatLng(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude());

            mMap.clear();

            mMap.addMarker(new MarkerOptions().position(userLocation).title("Marker"));

            mMap.moveCamera(CameraUpdateFactory.newLatLng(userLocation));

            Toast.makeText(MapsActivity.this, userLocation.toString(), Toast.LENGTH_SHORT).show();


        } else {

            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

        }


    }


    }
}

How do I return a proper success/error message for JQuery .ajax() using PHP?

Some people recommend using HTTP status codes, but I rather despise that practice. e.g. If you're doing a search engine and the provided keywords have no results, the suggestion would be to return a 404 error.

However, I consider that wrong. HTTP status codes apply to the actual browser<->server connection. Everything about the connect went perfectly. The browser made a request, the server invoked your handler script. The script returned 'no rows'. Nothing in that signifies "404 page not found" - the page WAS found.

Instead, I favor divorcing the HTTP layer from the status of your server-side operations. Instead of simply returning some text in a json string, I always return a JSON data structure which encapsulates request status and request results.

e.g. in PHP you'd have

$results = array(
   'error' => false,
   'error_msg' => 'Everything A-OK',
   'data' => array(....results of request here ...)
);
echo json_encode($results);

Then in your client-side code you'd have

if (!data.error) {
   ... got data, do something with it ...
} else {
   ... invoke error handler ...
}

What is the purpose of the var keyword and when should I use it (or omit it)?

You should use var keyword unless you intend to have the variable attached to window object in browser. Here's a link that explains scoping and difference between glocal scoping and local scoping with and wihtout var keyword.

When variables get defined without the use of var keyword, what it looks like is a simple “assignment” operation.

When the value is assigned to a variable in javascript, the interpreter first tries to find the “variable declaration” in the same context/scope as that of assignment. When the interpreter executes dummyVariable = 20, it looks up for the declaration of dummyVariable at beginning of the function. (Since all Variable declarations are moved to the beginning of the context by javascript interpreter and this is called hoisting)

You may also want to look at hoisting in javascript

Reading a plain text file in Java

My favorite way to read a small file is to use a BufferedReader and a StringBuilder. It is very simple and to the point (though not particularly effective, but good enough for most cases):

BufferedReader br = new BufferedReader(new FileReader("file.txt"));
try {
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();

    while (line != null) {
        sb.append(line);
        sb.append(System.lineSeparator());
        line = br.readLine();
    }
    String everything = sb.toString();
} finally {
    br.close();
}

Some has pointed out that after Java 7 you should use try-with-resources (i.e. auto close) features:

try(BufferedReader br = new BufferedReader(new FileReader("file.txt"))) {
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();

    while (line != null) {
        sb.append(line);
        sb.append(System.lineSeparator());
        line = br.readLine();
    }
    String everything = sb.toString();
}

When I read strings like this, I usually want to do some string handling per line anyways, so then I go for this implementation.

Though if I want to actually just read a file into a String, I always use Apache Commons IO with the class IOUtils.toString() method. You can have a look at the source here:

http://www.docjar.com/html/api/org/apache/commons/io/IOUtils.java.html

FileInputStream inputStream = new FileInputStream("foo.txt");
try {
    String everything = IOUtils.toString(inputStream);
} finally {
    inputStream.close();
}

And even simpler with Java 7:

try(FileInputStream inputStream = new FileInputStream("foo.txt")) {     
    String everything = IOUtils.toString(inputStream);
    // do something with everything string
}

Target a css class inside another css class

I use div instead of tables and am able to target classes within the main class, as below:

CSS

.main {
    .width: 800px;
    .margin: 0 auto;
    .text-align: center;
}
.main .table {
    width: 80%;
}
.main .row {
   / ***something ***/
}
.main .column {
    font-size: 14px;
    display: inline-block;
}
.main .left {
    width: 140px;
    margin-right: 5px;
    font-size: 12px;
}
.main .right {
    width: auto;
    margin-right: 20px;
    color: #fff;
    font-size: 13px;
    font-weight: normal;
}

HTML

<div class="main">
    <div class="table">
        <div class="row">
            <div class="column left">Swing Over Bed</div>
            <div class="column right">650mm</div>
            <div class="column left">Swing In Gap</div>
            <div class="column right">800mm</div>
        </div>
    </div>
</div>

If you want to style a particular "cell" exclusively you can use another sub-class or the id of the div e.g:

.main #red { color: red; }

<div class="main">
    <div class="table">
        <div class="row">
            <div id="red" class="column left">Swing Over Bed</div>
            <div class="column right">650mm</div>
            <div class="column left">Swing In Gap</div>
            <div class="column right">800mm</div>
        </div>
    </div>
</div>

Create folder with batch but only if it doesn't already exist

This should work for you:

IF NOT EXIST "\path\to\your\folder" md \path\to\your\folder

However, there is another method, but it may not be 100% useful:

md \path\to\your\folder >NUL 2>NUL

This one creates the folder, but does not show the error output if folder exists. I highly recommend that you use the first one. The second one is if you have problems with the other.

How to use UIPanGestureRecognizer to move object? iPhone/iPad

UIPanGestureRecognizer * pan1 = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(moveObject:)];
pan1.minimumNumberOfTouches = 1;
[image1 addGestureRecognizer:pan1];

-(void)moveObject:(UIPanGestureRecognizer *)pan;
{
 image1.center = [pan locationInView:image1.superview];
}

Convert date field into text in Excel

You can use TEXT like this as part of a concatenation

=TEXT(A1,"dd-mmm-yy") & " other string"

enter image description here

How can I increment a char?

"bad enough not having a traditional for(;;) looper"?? What?

Are you trying to do

import string
for c in string.lowercase:
    ...do something with c...

Or perhaps you're using string.uppercase or string.letters?

Python doesn't have for(;;) because there are often better ways to do it. It also doesn't have character math because it's not necessary, either.

How to get the xml node value in string

XmlDocument d = new XmlDocument();
d.Load(@"D:\Work_Time_Calculator\10-07-2013.xml");
XmlNodeList n = d.GetElementsByTagName("Short_Fall");
if(n != null) {
    Console.WriteLine(n[0].InnerText); //Will output '08:29:57'
}

or you could wrap in foreach loop to print each value

XmlDocument d = new XmlDocument();
d.Load(@"D:\Work_Time_Calculator\10-07-2013.xml");
XmlNodeList n = d.GetElementsByTagName("Short_Fall");
if(n != null) {
    foreach(XmlNode curr in n) {
        Console.WriteLine(curr.InnerText);
    }
}

Highlight all occurrence of a selected word?

I know than it's a really old question, but if someone is interested in this feature, can check this code http://vim.wikia.com/wiki/Auto_highlight_current_word_when_idle

" Highlight all instances of word under cursor, when idle.
" Useful when studying strange source code.
" Type z/ to toggle highlighting on/off.
nnoremap z/ :if AutoHighlightToggle()<Bar>set hls<Bar>endif<CR>
function! AutoHighlightToggle()
   let @/ = ''
   if exists('#auto_highlight')
     au! auto_highlight
     augroup! auto_highlight
     setl updatetime=4000
     echo 'Highlight current word: off'
     return 0
  else
    augroup auto_highlight
    au!
    au CursorHold * let @/ = '\V\<'.escape(expand('<cword>'), '\').'\>'
    augroup end
    setl updatetime=500
    echo 'Highlight current word: ON'
  return 1
 endif
endfunction

Python URLLib / URLLib2 POST

u = urllib2.urlopen('http://myserver/inout-tracker', data)
h.request('POST', '/inout-tracker/index.php', data, headers)

Using the path /inout-tracker without a trailing / doesn't fetch index.php. Instead the server will issue a 302 redirect to the version with the trailing /.

Doing a 302 will typically cause clients to convert a POST to a GET request.

I don't understand -Wl,-rpath -Wl,

The man page makes it pretty clear. If you want to pass two arguments (-rpath and .) to the linker you can write

-Wl,-rpath,.

or alternatively

-Wl,-rpath -Wl,.

The arguments -Wl,-rpath . you suggested do NOT make sense to my mind. How is gcc supposed to know that your second argument (.) is supposed to be passed to the linker instead of being interpreted normally? The only way it would be able to know that is if it had insider knowledge of all possible linker arguments so it knew that -rpath required an argument after it.

How to check if IsNumeric

There's the TryParse method, which returns a bool indicating if the conversion was successful.

Changing the interval of SetInterval while it's running

Here is yet another way to create a decelerating/accelerating interval timer. The interval gets multiplied by a factor until a total time is exceeded.

function setChangingInterval(callback, startInterval, factor, totalTime) {
    let remainingTime = totalTime;
    let interval = startInterval;

    const internalTimer = () => {
        remainingTime -= interval ;
        interval *= factor;
        if (remainingTime >= 0) {
            setTimeout(internalTimer, interval);
            callback();
        }
    };
    internalTimer();
}

Responsive width Facebook Page Plugin

This doesn't work too well when you have the plugin placed in a thin column, like a sidebar for example. On medium sized screens these typically run smaller than 280px in width.

.fb-page, 
.fb-page span, 
.fb-page span iframe[style] { 
    width: 100% !important; 
}

This is the code I use to stop the plugin breaking outside of a wrapping container. Unlike the old like box which would tile, this one just overflows, hiding the overflowed content.

An unhandled exception was generated during the execution of the current web request

As far as I understand, you have more than one form tag in your web page that causes the problem. Make sure you have only one server-side form tag for each page.

How to run travis-ci locally

I'm not sure what was your original reason for running Travis locally, if you just wanted to play with it, then stop reading here as it's irrelevant for you.

If you already have experience with hosted Travis and you want to get the same experience in your own datacenter, read on.

Since Dec 2014 Travis CI offers an Enterprise on-premises version.

http://blog.travis-ci.com/2014-12-19-introducing-travis-ci-enterprise/

The pricing is part of the article as well:

The licensing is done per seats, where every license includes 20 users. Pricing starts at $6,000 per license, which includes 20 users and 5 concurrent builds. There's a premium option with unlimited builds for $8,500.

Add a month to a Date

addedMonth <- seq(as.Date('2004-01-01'), length=2, by='1 month')[2]
addedQuarter <- seq(as.Date('2004-01-01'), length=2, by='1 quarter')[2]

How to enable directory listing in apache web server

This one solved my issue which is SELinux setting:

chcon -R -t httpd_sys_content_t /home/*

Encrypting & Decrypting a String in C#

Try this class:

public class DataEncryptor
{
    TripleDESCryptoServiceProvider symm;

    #region Factory
    public DataEncryptor()
    {
        this.symm = new TripleDESCryptoServiceProvider();
        this.symm.Padding = PaddingMode.PKCS7;
    }
    public DataEncryptor(TripleDESCryptoServiceProvider keys)
    {
        this.symm = keys;
    }

    public DataEncryptor(byte[] key, byte[] iv)
    {
        this.symm = new TripleDESCryptoServiceProvider();
        this.symm.Padding = PaddingMode.PKCS7;
        this.symm.Key = key;
        this.symm.IV = iv;
    }

    #endregion

    #region Properties
    public TripleDESCryptoServiceProvider Algorithm
    {
        get { return symm; }
        set { symm = value; }
    }
    public byte[] Key
    {
        get { return symm.Key; }
        set { symm.Key = value; }
    }
    public byte[] IV
    {
        get { return symm.IV; }
        set { symm.IV = value; }
    }

    #endregion

    #region Crypto

    public byte[] Encrypt(byte[] data) { return Encrypt(data, data.Length); }
    public byte[] Encrypt(byte[] data, int length)
    {
        try
        {
            // Create a MemoryStream.
            var ms = new MemoryStream();

            // Create a CryptoStream using the MemoryStream 
            // and the passed key and initialization vector (IV).
            var cs = new CryptoStream(ms,
                symm.CreateEncryptor(symm.Key, symm.IV),
                CryptoStreamMode.Write);

            // Write the byte array to the crypto stream and flush it.
            cs.Write(data, 0, length);
            cs.FlushFinalBlock();

            // Get an array of bytes from the 
            // MemoryStream that holds the 
            // encrypted data.
            byte[] ret = ms.ToArray();

            // Close the streams.
            cs.Close();
            ms.Close();

            // Return the encrypted buffer.
            return ret;
        }
        catch (CryptographicException ex)
        {
            Console.WriteLine("A cryptographic error occured: {0}", ex.Message);
        }
        return null;
    }

    public string EncryptString(string text)
    {
        return Convert.ToBase64String(Encrypt(Encoding.UTF8.GetBytes(text)));
    }

    public byte[] Decrypt(byte[] data) { return Decrypt(data, data.Length); }
    public byte[] Decrypt(byte[] data, int length)
    {
        try
        {
            // Create a new MemoryStream using the passed 
            // array of encrypted data.
            MemoryStream ms = new MemoryStream(data);

            // Create a CryptoStream using the MemoryStream 
            // and the passed key and initialization vector (IV).
            CryptoStream cs = new CryptoStream(ms,
                symm.CreateDecryptor(symm.Key, symm.IV),
                CryptoStreamMode.Read);

            // Create buffer to hold the decrypted data.
            byte[] result = new byte[length];

            // Read the decrypted data out of the crypto stream
            // and place it into the temporary buffer.
            cs.Read(result, 0, result.Length);
            return result;
        }
        catch (CryptographicException ex)
        {
            Console.WriteLine("A cryptographic error occured: {0}", ex.Message);
        }
        return null;
    }

    public string DecryptString(string data)
    {
        return Encoding.UTF8.GetString(Decrypt(Convert.FromBase64String(data))).TrimEnd('\0');
    }

    #endregion

}

and use it like this:

string message="A very secret message here.";
DataEncryptor keys=new DataEncryptor();
string encr=keys.EncryptString(message);

// later
string actual=keys.DecryptString(encr);

How do I connect to my existing Git repository using Visual Studio Code?

  1. Open Vs Code
  2. Go to view
  3. Click on terminal to open a terminal in VS Code
  4. Copy the link for your existing repository from your GitHub page.
  5. Type “git clone” and paste the link in addition i.e “git clone https://github.com/...”
  6. This will open the repository in your Vs Code Editor.

ComboBox.SelectedText doesn't give me the SelectedText

All of the previous answers explain what the OP 'should' do. I am explaining what the .SelectedText property is.

The .SelectedText property is not the text in the combobox. It is the text that is highlighted. It is the same as .SelectedText property for a textbox.

The following picture shows that the .SelectedText property would be equal to "ort".

enter image description here

How to disable an input box using angular.js

I created a directive for this (angular stable 1.0.8)

<input type="text" input-disabled="editableInput" />
<button ng-click="editableInput = !editableInput">enable/disable</button>

app.controller("myController", function(){
  $scope.editableInput = false;
});

app.directive("inputDisabled", function(){
  return function(scope, element, attrs){
    scope.$watch(attrs.inputDisabled, function(val){
      if(val)
        element.removeAttr("disabled");
      else
        element.attr("disabled", "disabled");
    });
  }
});

Onchange open URL via select - jQuery

Super easy way is as following. No need to create a function.

<select onchange="window.location = this.options[this.selectedIndex].value">
    <option value="">Switch Language</option>
    <option value="{{ url('/en') }}">English</option>
    <option value="{{ url('/ps') }}">????</option>
    <option value="{{ url('/fa') }}">???</option>
</select>

AngularJS - convert dates in controller

i suggest in Javascript:

var item=1387843200000;
var date1=new Date(item);

and then date1 is a Date.

Express.js Response Timeout

An update if one is using Express 4.2 then the timeout middleware has been removed so need to manually add it with

npm install connect-timeout

and in the code it has to be (Edited as per comment, how to include it in the code)

 var timeout = require('connect-timeout');
 app.use(timeout('100s'));

Can I animate absolute positioned element with CSS transition?

You forgot to define the default value for left so it doesn't know how to animate.

.test {
    left: 0;
    transition:left 1s linear;
}

See here: http://jsfiddle.net/shomz/yFy5n/5/

How to reverse MD5 to get the original string?

Its not possible thats the whole point of hashing. You can however bruteforce by going through all possibilities (using all possible digits characters in every possible order) and hashing them and checking for a collision.

for more information on hashing and MD5 etc see: http://en.wikipedia.org/wiki/MD5 , http://en.wikipedia.org/wiki/Hash_function , http://en.wikipedia.org/wiki/Cryptographic_hash_function and http://onin.com/hhh/hhhexpl.html

I myself created my own app to do this, its open source you can check the link: http://sourceforge.net/projects/jpassrecovery/ and of course the source. Here is the source for easy access it has a basic implementation in the comments:

Bruter.java:

import java.util.ArrayList;

public class Bruter {

    public ArrayList<String> characters = new ArrayList<>();
    public boolean found = false;
    public int maxLength;
    public int minLength;
    public int count;
    long starttime, endtime;
    public int minutes, seconds, hours, days;
    public char[] specialCharacters = {'~', '`', '!', '@', '#', '$', '%', '^',
        '&', '*', '(', ')', '_', '-', '+', '=', '{', '}', '[', ']', '|', '\\',
        ';', ':', '\'', '"', '<', '.', ',', '>', '/', '?', ' '};
    public boolean done = false;
    public boolean paused = false;

    public boolean isFound() {
        return found;
    }

    public void setPaused(boolean paused) {
        this.paused = paused;
    }

    public boolean isPaused() {
        return paused;
    }

    public void setFound(boolean found) {
        this.found = found;
    }

    public synchronized void setEndtime(long endtime) {
        this.endtime = endtime;
    }

    public int getCounter() {
        return count;
    }

    public long getRemainder() {
        return getNumberOfPossibilities() - count;
    }

    public long getNumberOfPossibilities() {
        long possibilities = 0;
        for (int i = minLength; i <= maxLength; i++) {
            possibilities += (long) Math.pow(characters.size(), i);
        }
        return possibilities;
    }

    public void addExtendedSet() {
        for (char c = (char) 0; c <= (char) 31; c++) {
            characters.add(String.valueOf(c));
        }
    }

    public void addStandardCharacterSet() {
        for (char c = (char) 32; c <= (char) 127; c++) {
            characters.add(String.valueOf(c));
        }
    }

    public void addLowerCaseLetters() {
        for (char c = 'a'; c <= 'z'; c++) {
            characters.add(String.valueOf(c));
        }
    }

    public void addDigits() {
        for (int c = 0; c <= 9; c++) {
            characters.add(String.valueOf(c));
        }
    }

    public void addUpperCaseLetters() {
        for (char c = 'A'; c <= 'Z'; c++) {
            characters.add(String.valueOf(c));
        }
    }

    public void addSpecialCharacters() {
        for (char c : specialCharacters) {
            characters.add(String.valueOf(c));
        }
    }

    public void setMaxLength(int i) {
        maxLength = i;
    }

    public void setMinLength(int i) {
        minLength = i;
    }

    public int getPerSecond() {
        int i;
        try {
            i = (int) (getCounter() / calculateTimeDifference());
        } catch (Exception ex) {
            return 0;
        }
        return i;

    }

    public String calculateTimeElapsed() {
        long timeTaken = calculateTimeDifference();
        seconds = (int) timeTaken;
        if (seconds > 60) {
            minutes = (int) (seconds / 60);
            if (minutes * 60 > seconds) {
                minutes = minutes - 1;
            }

            if (minutes > 60) {
                hours = (int) minutes / 60;
                if (hours * 60 > minutes) {
                    hours = hours - 1;
                }
            }

            if (hours > 24) {
                days = (int) hours / 24;
                if (days * 24 > hours) {
                    days = days - 1;
                }
            }
            seconds -= (minutes * 60);
            minutes -= (hours * 60);
            hours -= (days * 24);
            days -= (hours * 24);
        }
        return "Time elapsed: " + days + "days " + hours + "h " + minutes + "min " + seconds + "s";
    }

    private long calculateTimeDifference() {
        long timeTaken = (long) ((endtime - starttime) * (1 * Math.pow(10, -9)));
        return timeTaken;
    }

    public boolean excludeChars(String s) {
        char[] arrayChars = s.toCharArray();
        for (int i = 0; i < arrayChars.length; i++) {
            characters.remove(arrayChars[i] + "");
        }
        if (characters.size() < maxLength) {
            return false;
        } else {
            return true;

        }
    }

    public int getMaxLength() {
        return maxLength;
    }

    public int getMinLength() {
        return minLength;
    }

    public void setIsDone(Boolean b) {
        done = b;
    }

    public boolean isDone() {
        return done;
    }
}

HashBruter.java:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.zip.Adler32;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
import javax.swing.JOptionPane;

public class HashBruter extends Bruter {
    /*
     * public static void main(String[] args) {
     *
     * final HashBruter hb = new HashBruter();
     *
     * hb.setMaxLength(5); hb.setMinLength(1);
     *
     * hb.addSpecialCharacters(); hb.addUpperCaseLetters();
     * hb.addLowerCaseLetters(); hb.addDigits();
     *
     * hb.setType("sha-512");
     *
     * hb.setHash("282154720ABD4FA76AD7CD5F8806AA8A19AEFB6D10042B0D57A311B86087DE4DE3186A92019D6EE51035106EE088DC6007BEB7BE46994D1463999968FBE9760E");
     *
     * Thread thread = new Thread(new Runnable() {
     *
     * @Override public void run() { hb.tryBruteForce(); } });
     *
     * thread.start();
     *
     * while (!hb.isFound()) { System.out.println("Hash: " +
     * hb.getGeneratedHash()); System.out.println("Number of Possibilities: " +
     * hb.getNumberOfPossibilities()); System.out.println("Checked hashes: " +
     * hb.getCounter()); System.out.println("Estimated hashes left: " +
     * hb.getRemainder()); }
     *
     * System.out.println("Found " + hb.getType() + " hash collision: " +
     * hb.getGeneratedHash() + " password is: " + hb.getPassword());
     *
     * }
     */

    public String hash, generatedHash, password;
    public String type;

    public String getType() {
        return type;
    }

    public String getPassword() {
        return password;
    }

    public void setHash(String p) {
        hash = p;
    }

    public void setType(String digestType) {
        type = digestType;
    }

    public String getGeneratedHash() {
        return generatedHash;
    }

    public void tryBruteForce() {
        starttime = System.nanoTime();
        for (int size = minLength; size <= maxLength; size++) {
            if (found == true || done == true) {
                break;
            } else {
                while (paused) {
                    try {
                        Thread.sleep(500);
                    } catch (InterruptedException ex) {
                        ex.printStackTrace();
                    }
                }
                generateAllPossibleCombinations("", size);
            }
        }
        done = true;
    }

    private void generateAllPossibleCombinations(String baseString, int length) {
        while (paused) {
            try {
                Thread.sleep(500);
            } catch (InterruptedException ex) {
                ex.printStackTrace();
            }
        }
        if (found == false || done == false) {
            if (baseString.length() == length) {
                if(type.equalsIgnoreCase("crc32")) {
                generatedHash = generateCRC32(baseString);
                } else if(type.equalsIgnoreCase("adler32")) {
                generatedHash = generateAdler32(baseString);
                } else if(type.equalsIgnoreCase("crc16")) {
                    generatedHash=generateCRC16(baseString);
                } else if(type.equalsIgnoreCase("crc64")) {
                    generatedHash=generateCRC64(baseString.getBytes());
                }
                else {
                generatedHash = generateHash(baseString.toCharArray());
                }
                    password = baseString;
                if (hash.equals(generatedHash)) {
                    password = baseString;
                    found = true;
                    done = true;
                }
                count++;
            } else if (baseString.length() < length) {
                for (int n = 0; n < characters.size(); n++) {
                    generateAllPossibleCombinations(baseString + characters.get(n), length);
                }
            }
        }
    }

    private String generateHash(char[] passwordChar) {
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance(type);
        } catch (NoSuchAlgorithmException e1) {
            JOptionPane.showMessageDialog(null, "No such algorithm for hashes exists", "Error", JOptionPane.ERROR_MESSAGE);
        }
        String passwordString = new String(passwordChar);
        byte[] passwordByte = passwordString.getBytes();
        md.update(passwordByte, 0, passwordByte.length);
        byte[] encodedPassword = md.digest();
        String encodedPasswordInString = toHexString(encodedPassword);
        return encodedPasswordInString;
    }

    private void byte2hex(byte b, StringBuffer buf) {
        char[] hexChars = {'0', '1', '2', '3', '4', '5', '6', '7', '8',
            '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        int high = ((b & 0xf0) >> 4);
        int low = (b & 0x0f);
        buf.append(hexChars[high]);
        buf.append(hexChars[low]);
    }

    private String toHexString(byte[] block) {
        StringBuffer buf = new StringBuffer();
        int len = block.length;
        for (int i = 0; i < len; i++) {
            byte2hex(block[i], buf);
        }
        return buf.toString();
    }

    private String generateCRC32(String baseString) {

                //Convert string to bytes
                byte bytes[] = baseString.getBytes();

                Checksum checksum = new CRC32();

                /*
                 * To compute the CRC32 checksum for byte array, use
                 *
                 * void update(bytes[] b, int start, int length)
                 * method of CRC32 class.
                 */

                checksum.update(bytes,0,bytes.length);

                /*
                 * Get the generated checksum using
                 * getValue method of CRC32 class.
                 */
                return String.valueOf(checksum.getValue());
    }   
    private String generateAdler32(String baseString) {

                //Convert string to bytes
                byte bytes[] = baseString.getBytes();

                Checksum checksum = new Adler32();

                /*
                 * To compute the CRC32 checksum for byte array, use
                 *
                 * void update(bytes[] b, int start, int length)
                 * method of CRC32 class.
                 */

                checksum.update(bytes,0,bytes.length);

                /*
                 * Get the generated checksum using
                 * getValue method of CRC32 class.
                 */
                return String.valueOf(checksum.getValue());
    }
/*************************************************************************
 *  Compilation:  javac CRC16.java
 *  Execution:    java CRC16 s
 *  
 *  Reads in a string s as a command-line argument, and prints out
 *  its 16-bit Cyclic Redundancy Check (CRC16). Uses a lookup table.
 *
 *  Reference:  http://www.gelato.unsw.edu.au/lxr/source/lib/crc16.c
 *
 *  % java CRC16 123456789
 *  CRC16 = bb3d
 *
 * Uses irreducible polynomial:  1 + x^2 + x^15 + x^16
 *
 *
 *************************************************************************/
    private String generateCRC16(String baseString) {
                int[] table = {
            0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
            0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
            0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
            0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
            0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
            0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
            0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
            0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
            0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
            0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
            0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
            0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
            0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
            0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
            0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
            0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
            0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
            0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
            0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
            0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
            0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
            0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
            0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
            0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
            0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
            0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
            0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
            0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
            0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
            0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
            0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
            0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040,
        };


        byte[] bytes = baseString.getBytes();
        int crc = 0x0000;
        for (byte b : bytes) {
            crc = (crc >>> 8) ^ table[(crc ^ b) & 0xff];
        }

        return Integer.toHexString(crc);
    }
    /*******************************************************************************
 * Copyright (c) 2009, 2012 Mountainminds GmbH & Co. KG and Contributors
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Marc R. Hoffmann - initial API and implementation
 *    
 *******************************************************************************/

/**
 * CRC64 checksum calculator based on the polynom specified in ISO 3309. The
 * implementation is based on the following publications:
 * 
 * <ul>
 * <li>http://en.wikipedia.org/wiki/Cyclic_redundancy_check</li>
 * <li>http://www.geocities.com/SiliconValley/Pines/8659/crc.htm</li>
 * </ul>
 */
    private static final long POLY64REV = 0xd800000000000000L;

    private static final long[] LOOKUPTABLE;

    static {
        LOOKUPTABLE = new long[0x100];
        for (int i = 0; i < 0x100; i++) {
            long v = i;
            for (int j = 0; j < 8; j++) {
                if ((v & 1) == 1) {
                    v = (v >>> 1) ^ POLY64REV;
                } else {
                    v = (v >>> 1);
                }
            }
            LOOKUPTABLE[i] = v;
        }
    }

    /**
     * Calculates the CRC64 checksum for the given data array.
     * 
     * @param data
     *            data to calculate checksum for
     * @return checksum value
     */
    public static String generateCRC64(final byte[] data) {
        long sum = 0;
        for (int i = 0; i < data.length; i++) {
            final int lookupidx = ((int) sum ^ data[i]) & 0xff;
            sum = (sum >>> 8) ^ LOOKUPTABLE[lookupidx];
        }
        return String.valueOf(sum);
    }
}

you would use it like:

      final HashBruter hb = new HashBruter();

      hb.setMaxLength(5); hb.setMinLength(1);

     hb.addSpecialCharacters(); hb.addUpperCaseLetters();
     hb.addLowerCaseLetters(); hb.addDigits();

      hb.setType("sha-512");

                   hb.setHash("282154720ABD4FA76AD7CD5F8806AA8A19AEFB6D10042B0D57A311B86087DE4DE3186A92019D6EE51035106EE088DC6007BEB7BE46994D1463999968FBE9760E");

      Thread thread = new Thread(new Runnable() {

      @Override public void run() { hb.tryBruteForce(); } });

      thread.start();

      while (!hb.isFound()) { System.out.println("Hash: " +
      hb.getGeneratedHash()); System.out.println("Number of Possibilities: " +
      hb.getNumberOfPossibilities()); System.out.println("Checked hashes: " +
     hb.getCounter()); System.out.println("Estimated hashes left: " +
     hb.getRemainder()); }

     System.out.println("Found " + hb.getType() + " hash collision: " +
     hb.getGeneratedHash() + " password is: " + hb.getPassword());

How to call python script on excel vba?

You can also try ExcelPython which allows you to manipulate Python object and call code from VBA.

How to resolve the error "Unable to access jarfile ApacheJMeter.jar errorlevel=1" while initiating Jmeter?

I'm running JMeter 2.8 (Windows 7) and received a message similar to that in the original post:

C:\>jmeter
Error: Unable to access jarfile C:\local\software\jMeter\apache-jmeter-2.8\binApacheJMeter.jar
errorlevel=1
Press any key to continue . . .

I'd created a Windows environment variable JMETER_BIN and set it to the JMeter path which I could see contained ApacheJMeter.jar (so it wasn't a question that the jar was missing).

I should have noticed at the time this portion of the error: "binApacheJMeter.jar"

When I went to the jmeter.bat file to troubleshoot, I noticed this line:

%JM_START% %JM_LAUNCH% %ARGS% %JVM_ARGS% -jar "%JMETER_BIN%ApacheJMeter.jar" %JMETER_CMD_LINE_ARGS%

and that caused me to revisit the "binApacheJMeter.jar" portion of the error.

What was happening was that the batch file was requiring a trailing slash on the end of the path in the JMETER_BIN environment variable to correctly specify the location of the .jar.

Once I corrected my environment variable, adding the trailing slash, all was wonderful.

YMMV, but this worked for me.

Why cannot cast Integer to String in java?

No. Every object can be casted to an java.lang.Object, not a String. If you want a string representation of whatever object, you have to invoke the toString() method; this is not the same as casting the object to a String.

Check if a radio button is checked jquery

Something like this:

 $("input[name=test]").is(":checked");

Using the jQuery is() function should work.

This certificate has an invalid issuer Apple Push Services

Here is how we fixed this.

Step 1: Open Keychain access, delete "Apple world wide Developer relations certification authority" (which expires on 14th Feb 2016) from both "Login" and "System" sections. If you can't find it, use “Show Expired Certificates” in the View menu.

Step 2: Download this and add it to Keychain access -> Certificates (which expires on 8th Feb 2023).

Step 3: Everything should be back to normal and working now.

Reference: Apple Worldwide Developer Relations Intermediate Certificate Expiration

java.lang.RuntimeException: Uncompilable source code - what can cause this?

Just check the packaging, the simplest answer I can provide is that your package has been mislabeled (within a class).

Also, you may have some weird characters. Try white-flushing the code in a Notepad (or Gedit) and then pasting it into a newly created class with your IDE.

Inline comments for Bash?

My preferred is:

Commenting in a Bash script

This will have some overhead, but technically it does answer your question

echo abc `#put your comment here` \
     def `#another chance for a comment` \
     xyz etc

And for pipelines specifically, there is a cleaner solution with no overhead

echo abc |        # normal comment OK here
     tr a-z A-Z | # another normal comment OK here
     sort |       # the pipelines are automatically continued
     uniq         # final comment

How to put a line comment for a multi-line command

A simple algorithm for polygon intersection

I understand the original poster was looking for a simple solution, but unfortunately there really is no simple solution.

Nevertheless, I've recently created an open-source freeware clipping library (written in Delphi, C++ and C#) which clips all kinds of polygons (including self-intersecting ones). This library is pretty simple to use: http://sourceforge.net/projects/polyclipping/ .

UIAlertController custom font, size, color

Swift 4

Example of custom font on the title. Same things for other components such as message or actions.

    let titleAttributed = NSMutableAttributedString(
            string: Constant.Strings.cancelAbsence, 
            attributes: [NSAttributedStringKey.font:UIFont(name:"FONT_NAME",size: FONT_SIZE)]
    )

    let alertController = UIAlertController(
        title: "",
        message: "",
        preferredStyle: UIAlertControllerStyle.YOUR_STYLE
    )

    alertController.setValue(titleAttributed, forKey : "attributedTitle")
    present(alertController, animated: true, completion: nil)

How to check ASP.NET Version loaded on a system?

open a new command prompt and run the following command: dotnet --info

PHP error: php_network_getaddresses: getaddrinfo failed: (while getting information from other site.)

I faced this issue, while connecting DB, the variable to connect to db was not defined.

Cause: php tried to connect to the db with undefined variable for db host (localhost/127.0.0.1/... any other ip or domain) but failed to trace the domain.

Solution: Make sure the db host is properly defined.

Is there an easy way to convert jquery code to javascript?

This will get you 90% of the way there ; )

window.$ = document.querySelectorAll.bind(document)

For Ajax, the Fetch API is now supported on the current version of every major browser. For $.ready(), DOMContentLoaded has near universal support. You Might Not Need jQuery gives equivalent native methods for other common jQuery functions.

Zepto offers similar functionality but weighs in at 10K zipped. There are custom Ajax builds for jQuery and Zepto as well as some micro frameworks, but jQuery/Zepto have solid support and 10KB is only ~1 second on a 56K modem.

Get OS-level system information

One simple way which can be used to get the OS level information and I tested in my Mac which works well :

 OperatingSystemMXBean osBean =
        (OperatingSystemMXBean)ManagementFactory.getOperatingSystemMXBean();
    return osBean.getProcessCpuLoad();

You can find many relevant metrics of the operating system here

How can I tell jaxb / Maven to generate multiple schema packages?

This is fixed in version 1.6 of the plugin.

            <groupId>org.codehaus.mojo</groupId>
            <artifactId>jaxb2-maven-plugin</artifactId>
            <version>1.6</version>

Quick note though, I noticed that the first iteration output was being deleted. I fixed it by adding the following to each of the executions.

                        <removeOldOutput>false</removeOldOutput>
                        <clearOutputDir>false</clearOutputDir>

Here is my full working example with each iteration outputting correctly. BTW I had to do this due to a duplicate namespace problem with the xsd's I was given. This seems to resolve my problem.

        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>jaxb2-maven-plugin</artifactId>
            <version>1.6</version>
            <executions>
                <execution>
                    <id>submitOrderRequest</id>
                    <goals>
                        <goal>xjc</goal>
                    </goals>
                    <configuration>
                        <extension>true</extension>
                        <schemaDirectory>src/main/resources/xsd/</schemaDirectory>
                        <!-- <schemaFiles>getOrderStatusResponse.xsd,quoteShippingRequest.xsd,quoteShippingResponse.xsd,submitOrderRequest.xsd,submitOrderResponse.xsd</schemaFiles> -->
                        <schemaFiles>submitOrderRequest.xsd</schemaFiles>
                        <bindingDirectory>${project.basedir}/src/main/resources/xjb</bindingDirectory>
                        <bindingFiles>submitOrderRequest.xjb</bindingFiles>
                        <removeOldOutput>false</removeOldOutput>
                        <clearOutputDir>false</clearOutputDir>
                    </configuration>
                </execution>
                <execution>
                    <id>submitOrderResponse</id>
                    <goals>
                        <goal>xjc</goal>
                    </goals>
                    <configuration>
                        <extension>true</extension>
                        <schemaDirectory>src/main/resources/xsd/</schemaDirectory>
                        <!-- <schemaFiles>getOrderStatusResponse.xsd,quoteShippingRequest.xsd,quoteShippingResponse.xsd,submitOrderRequest.xsd,submitOrderResponse.xsd</schemaFiles> -->
                        <schemaFiles>submitOrderResponse.xsd</schemaFiles>
                        <bindingDirectory>${project.basedir}/src/main/resources/xjb</bindingDirectory>
                        <bindingFiles>submitOrderResponse.xjb</bindingFiles>
                        <removeOldOutput>false</removeOldOutput>
                        <clearOutputDir>false</clearOutputDir>
                    </configuration>
                </execution>
            </executions>

        </plugin>

Error: could not find function ... in R

There are a few things you should check :

  1. Did you write the name of your function correctly? Names are case sensitive.
  2. Did you install the package that contains the function? install.packages("thePackage") (this only needs to be done once)
  3. Did you attach that package to the workspace ? require(thePackage) or library(thePackage) (this should be done every time you start a new R session)
  4. Are you using an older R version where this function didn't exist yet?

If you're not sure in which package that function is situated, you can do a few things.

  1. If you're sure you installed and attached/loaded the right package, type help.search("some.function") or ??some.function to get an information box that can tell you in which package it is contained.
  2. find and getAnywhere can also be used to locate functions.
  3. If you have no clue about the package, you can use findFn in the sos package as explained in this answer.
  4. RSiteSearch("some.function") or searching with rdocumentation or rseek are alternative ways to find the function.

Sometimes you need to use an older version of R, but run code created for a newer version. Newly added functions (eg hasName in R 3.4.0) won't be found then. If you use an older R version and want to use a newer function, you can use the package backports to make such functions available. You also find a list of functions that need to be backported on the git repo of backports. Keep in mind that R versions older than R3.0.0 are incompatible with packages built for R3.0.0 and later versions.

Check if input is integer type in C

This method works for everything (integers and even doubles) except zero (it calls it invalid):

The while loop is just for the repetitive user input. Basically it checks if the integer x/x = 1. If it does (as it would with a number), its an integer/double. If it doesn't, it obviously it isn't. Zero fails the test though.

#include <stdio.h> 
#include <math.h>

void main () {
    double x;
    int notDouble;
    int true = 1;
    while(true) {
        printf("Input an integer: \n");
        scanf("%lf", &x);
        if (x/x != 1) {
            notDouble = 1;
            fflush(stdin);
        }
        if (notDouble != 1) {
            printf("Input is valid\n");
        }
        else {
            printf("Input is invalid\n");
        }
        notDouble = 0;
    }
}

Index of element in NumPy array

You can convert a numpy array to list and get its index .

for example:

tmp = [1,2,3,4,5] #python list
a = numpy.array(tmp) #numpy array
i = list(a).index(2) # i will return index of 2, which is 1

this is just what you wanted.

Altering a column to be nullable

ALTER TABLE Merchant_Pending_Functions MODIFY COLUMN `NumberOfLocations` INT null;

This will work for you.

If you want to change a not null column to allow null, no need to include not null clause. Because default columns get not null.

ALTER TABLE Merchant_Pending_Functions MODIFY COLUMN `NumberOfLocations` INT;

Formula px to dp, dp to px android

I solved my problem by using the following formulas. May other people benefit from it.

dp to px:

displayMetrics = context.getResources().getDisplayMetrics();
return (int)((dp * displayMetrics.density) + 0.5);

px to dp:

displayMetrics = context.getResources().getDisplayMetrics();
return (int) ((px/displayMetrics.density)+0.5);

Display an array in a readable/hierarchical format

<?php 
//Make an array readable as string
function array_read($array, $seperator = ', ', $ending = ' and '){
      $opt = count($array);
      return $opt > 1 ? implode($seperator,array_slice($array,0,$opt-1)).$ending.end($array) : $array[0];
}
?>

I use this to show a pretty printed array to my visitors

Visual Studio 6 Windows Common Controls 6.0 (sp6) Windows 7, 64 bit

=> just what jay said just delete those registry entries which are pointing to other paths other than on c:\windows\system32.Those are the culprits of the error.I got those errors on my vb6 IDE and after deleting those anomalous registry entries the problem was fixed. works like a charm.

Transpose a data frame

You can use the transpose function from the data.table library. Simple and fast solution that keeps numeric values as numeric.

library(data.table)

# get data
  data("mtcars")

# transpose
  t_mtcars <- transpose(mtcars)

# get row and colnames in order
  colnames(t_mtcars) <- rownames(mtcars)
  rownames(t_mtcars) <- colnames(mtcars)

How do I center text vertically and horizontally in Flutter?

maybe u want to provide the same width and height for 2 container

Container(
            width: size.width * 0.30, height: size.height * 0.4,
            alignment: Alignment.center,
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(6)
            ),
            child: Center(
              child: Text(categoryName, textAlign: TextAlign.center, style: TextStyle(
                fontWeight: FontWeight.bold,
                fontSize: 17,
                color: Colors.white,
              ),),
            ),

HttpServletRequest - Get query string parameters, no form data

I am afraid there is no way to get the query string parameters parsed separately from the post parameters. BTW the fact that such API absent may mean that probably you should check your design. Why are you using query string when sending POST? If you really want to send more data into URL use REST-like convention, e.g. instead of sending

http://mycompany.com/myapp/myservlet?first=11&second=22

say:

http://mycompany.com/myapp/myservlet/11/22

How to Find Item in Dictionary Collection?

It's possible to find the element in Dictionary collection by using ContainsKey or TryGetValue as follows:

class Program
{
    protected static Dictionary<string, string> _tags = new Dictionary<string,string>();

    static void Main(string[] args)
    {
        string strValue;

        _tags.Add("101", "C#");
        _tags.Add("102", "ASP.NET");

        if (_tags.ContainsKey("101"))
        {
            strValue = _tags["101"];
            Console.WriteLine(strValue);
        }

        if (_tags.TryGetValue("101", out strValue))
        {
            Console.WriteLine(strValue);
        }
    }
}

laravel 5.4 upload image

i think better to do this

    if ( $request->hasFile('file')){
        if ($request->file('file')->isValid()){
            $file = $request->file('file');
            $name = $file->getClientOriginalName();
            $file->move('images' , $name);
            $inputs = $request->all();
            $inputs['path'] = $name;
        }
    }
    Post::create($inputs);

actually images is folder that laravel make it automatic and file is name of the input and here we store name of the image in our path column in the table and store image in public/images directory

Laravel: Error [PDOException]: Could not Find Driver in PostgreSQL

For PHP 7 in Ubuntu you can also do:

sudo apt-get install php7.0-pgsql

So, now you can do not uncomment lines in php.ini

UPD: I have a same error, so problem was not in driver. I changed my database.ini, but every time I saw an error. And I change database config in .env and errors gone.

Is there any way to specify a suggested filename when using data: URI?

No.

The entire purpose is that it's a datastream, not a file. The data source should not have any knowledge of the user agent handling it as a file... and it doesn't.

Angular 2 router no base href set

You can also use hash-based navigation by including the following in app.module.ts

import { LocationStrategy, HashLocationStrategy } from '@angular/common';

and by adding the following to the @NgModule({ ... })

@NgModule({
  ...
  providers:    [
      ProductService, {
          provide: LocationStrategy, useClass: HashLocationStrategy
      }
  ],
  ...
})

Angular 2 Development with TypeScript

“HashLocationStrategy—A hash sign (#) is added to the URL, and the URL segment after the hash uniquely identifies the route to be used as a web page fragment. This strategy works with all browsers, including the old ones.”

Excerpt From: Yakov Fain Anton Moiseev. “Angular 2 Development with TypeScript.”

Regular expression to match a line that doesn't contain a word

Note that the solution to does not start with “hede”:

^(?!hede).*$

is generally much more efficient than the solution to does not contain “hede”:

^((?!hede).)*$

The former checks for “hede” only at the input string’s first position, rather than at every position.

How to access global js variable in AngularJS directive

I have tried these methods and find that they dont work for my needs. In my case, I needed to inject json rendered server side into the main template of the page, so when it loads and angular inits, the data is already there and doesnt have to be retrieved (large dataset).

The easiest solution that I have found is to do the following:

In your angular code outside of the app, module and controller definitions add in a global javascript value - this definition MUST come before the angular stuff is defined.

Example:

'use strict';

//my data variable that I need access to.
var data = null;

angular.module('sample', [])

Then in your controller:

.controller('SampleApp', function ($scope, $location) {

$scope.availableList = [];

$scope.init = function () {
    $scope.availableList = data;
}

Finally, you have to init everything (order matters):

  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
  <script src="/path/to/your/angular/js/sample.js"></script>
  <script type="text/javascript">
      data = <?= json_encode($cproducts); ?>
  </script>

Finally initialize your controller and init function.

  <div ng-app="samplerrelations" ng-controller="SamplerApp" ng-init="init();">

By doing this you will now have access to whatever data you stuffed into the global variable.

How to find MAC address of an Android device programmatically

With this code you will be also able to get MacAddress in Android 6.0 also

public static String getMacAddr() {
    try {
        List <NetworkInterface> all = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface nif: all) {
            if (!nif.getName().equalsIgnoreCase("wlan0")) continue;

            byte[] macBytes = nif.getHardwareAddress();
            if (macBytes == null) {
                return "";
            }

            StringBuilder res1 = new StringBuilder();
            for (byte b: macBytes) {
                //res1.append(Integer.toHexString(b & 0xFF) + ":");
                res1.append(String.format("%02X:", b));
            }

            if (res1.length() > 0) {
                res1.deleteCharAt(res1.length() - 1);
            }
            return res1.toString();
        }
    } catch (Exception ex) {}
    return "02:00:00:00:00:00";
}

EDIT 1. This answer got a bug where a byte that in hex form got a single digit, will not appear with a "0" before it. The append to res1 has been changed to take care of it.

Image UriSource and Data Binding

You can also simply set the Source attribute rather than using the child elements. To do this your class needs to return the image as a Bitmap Image. Here is an example of one way I've done it

<Image Width="90" Height="90" 
       Source="{Binding Path=ImageSource}"
       Margin="0,0,0,5" />

And the class property is simply this

public object ImageSource {
    get {
        BitmapImage image = new BitmapImage();

        try {
            image.BeginInit();
            image.CacheOption = BitmapCacheOption.OnLoad;
            image.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
            image.UriSource = new Uri( FullPath, UriKind.Absolute );
            image.EndInit();
        }
        catch{
            return DependencyProperty.UnsetValue;
        }

        return image;
    }
}

I suppose it may be a little more work than the value converter, but it is another option.

Setting new value for an attribute using jQuery

It is working you have to check attr after assigning value

LiveDemo

$('#amount').attr( 'datamin','1000');

alert($('#amount').attr( 'datamin'));?

How to overwrite the output directory in spark

This overloaded version of the save function works for me:

yourDF.save(outputPath, org.apache.spark.sql.SaveMode.valueOf("Overwrite"))

The example above would overwrite an existing folder. The savemode can take these parameters as well (https://spark.apache.org/docs/1.4.0/api/java/org/apache/spark/sql/SaveMode.html):

Append: Append mode means that when saving a DataFrame to a data source, if data/table already exists, contents of the DataFrame are expected to be appended to existing data.

ErrorIfExists: ErrorIfExists mode means that when saving a DataFrame to a data source, if data already exists, an exception is expected to be thrown.

Ignore: Ignore mode means that when saving a DataFrame to a data source, if data already exists, the save operation is expected to not save the contents of the DataFrame and to not change the existing data.

How do I compare a value to a backslash?

Use following code to perform if-else conditioning in python: Here, I am checking the length of the string. If the length is less than 3 then do nothing, if more then 3 then I check the last 3 characters. If last 3 characters are "ing" then I add "ly" at the end otherwise I add "ing" at the end.

Code-

if (len(s)<=3):
    return s
elif s[-3:]=="ing":
    return s+"ly"
else: return s + "ing"

Where will log4net create this log file?

If you want your log file to be place at a specified location which will be decided at run time may be your project output directory then you can configure your .config file entry in that way

<file type="log4net.Util.PatternString" value="%property{LogFileName}.txt" />

and then in the code before calling log4net configure, set the new path like below

 log4net.GlobalContext.Properties["LogFileName"] = @"E:\\file1"; //log file path
 log4net.Config.XmlConfigurator.Configure();

How simple is it? :)

Node Version Manager install - nvm command not found

I also faced the same problem recently and sourcing nvm bash script by using source ~/.nvm/nvm.sh resolved this issue.

How to print a two dimensional array?

Something like this that i answer in another question

public class Snippet {
    public static void main(String[] args) {
        int [][]lst = new int[10][10];

        for (int[] arr : lst) {
            System.out.println(Arrays.toString(arr));
        }
    }

}

Redirect all output to file in Bash

You can use exec command to redirect all stdout/stderr output of any commands later.

sample script:

exec 2> your_file2 > your_file1
your other commands.....

How to make in CSS an overlay over an image?

Putting this answer here as it is the top result in Google.

If you want a quick and simple way:

    filter: brightness(0.2);

*Not compatible with IE

Opening port 80 EC2 Amazon web services

Some quick tips:

  1. Disable the inbuilt firewall on your Windows instances.
  2. Use the IP address rather than the DNS entry.
  3. Create a security group for tcp ports 1 to 65000 and for source 0.0.0.0/0. It's obviously not to be used for production purposes, but it will help avoid the Security Groups as a source of problems.
  4. Check that you can actually ping your server. This may also necessitate some Security Group modification.

Print array to a file

Here is what I learned in last 17 hours which solved my problem while searching for a similar solution.

resources:

http://php.net/manual/en/language.types.array.php

Specific Code :

// The following is okay, as it's inside a string. Constants are not looked for
// within strings, so no E_NOTICE occurs here
print "Hello $arr[fruit]";      // Hello apple

What I took from above, $arr[fruit] can go inside " " (double quotes) and be accepted as string by PHP for further processing.

Second Resource is the code in one of the answers above:

file_put_contents($file, print_r($array, true), FILE_APPEND)

This is the second thing I didn't knew, FILE_APPEND.

What I was trying to achieve is get contents from a file, edit desired data and update the file with new data but after deleting old data.

Now I only need to know how to delete data from file before adding updated data.

About other solutions:

Just so that it may be helpful to other people; when I tried var_export or Print_r or Serialize or Json.Encode, I either got special characters like => or ; or ' or [] in the file or some kind of error. Tried too many things to remember all errors. So if someone may want to try them again (may have different scenario than mine), they may expect errors.

About reading file, editing and updating:

I used fgets() function to load file array into a variable ($array) and then use unset($array[x]) (where x stands for desired array number, 1,2,3 etc) to remove particular array. Then use array_values() to re-index and load the array into another variable and then use a while loop and above solutions to dump the array (without any special characters) into target file.

$x=0;

while ($x <= $lines-1) //$lines is count($array) i.e. number of lines in array $array
    {
        $txt= "$array[$x]";
        file_put_contents("file.txt", $txt, FILE_APPEND);
        $x++;
    }

jQuery checkbox onChange

There is a typo error :

$('#activelist :checkbox')...

Should be :

$('#inactivelist:checkbox')...

Warn user before leaving web page with unsaved changes

var unsaved = false;
$(":input").change(function () {         
    unsaved = true;
});

function unloadPage() {         
    if (unsaved) {             
        alert("You have unsaved changes on this page. Do you want to leave this page and discard your changes or stay on this page?");
    }
} 
window.onbeforeunload = unloadPage;

Type datetime for input parameter in procedure

In this part of your SP:

IF @DateFirst <> '' and @DateLast <> ''
   set @FinalSQL  = @FinalSQL
       + '  or convert (Date,DateLog) >=     ''' + @DateFirst
       + ' and convert (Date,DateLog) <=''' + @DateLast  

you are trying to concatenate strings and datetimes.

As the datetime type has higher priority than varchar/nvarchar, the + operator, when it happens between a string and a datetime, is interpreted as addition, not as concatenation, and the engine then tries to convert your string parts (' or convert (Date,DateLog) >= ''' and others) to datetime or numeric values. And fails.

That doesn't happen if you omit the last two parameters when invoking the procedure, because the condition evaluates to false and the offending statement isn't executed.

To amend the situation, you need to add explicit casting of your datetime variables to strings:

set @FinalSQL  = @FinalSQL
    + '  or convert (Date,DateLog) >=     ''' + convert(date, @DateFirst)
    + ' and convert (Date,DateLog) <=''' + convert(date, @DateLast)

You'll also need to add closing single quotes:

set @FinalSQL  = @FinalSQL
    + '  or convert (Date,DateLog) >=     ''' + convert(date, @DateFirst) + ''''
    + ' and convert (Date,DateLog) <=''' + convert(date, @DateLast) + ''''

How to change max_allowed_packet size

Following all instructions, this is what I did and worked:

mysql> SELECT CONNECTION_ID();//This is my ID for this session.
+-----------------+
| CONNECTION_ID() |
+-----------------+
|              20 |
+-----------------+
1 row in set (0.00 sec)

mysql> select @max_allowed_packet //Mysql do not found @max_allowed_packet
+---------------------+
| @max_allowed_packet |
+---------------------+
| NULL                |
+---------------------+
1 row in set (0.00 sec)

mysql> Select @@global.max_allowed_packet; //That is better... I have max_allowed_packet=32M inside my.ini
+-----------------------------+
| @@global.max_allowed_packet |
+-----------------------------+
|                    33554432 |
+-----------------------------+
1 row in set (0.00 sec)

mysql> **SET GLOBAL max_allowed_packet=1073741824**; //Now I'm changing the value.
Query OK, 0 rows affected (0.00 sec)

mysql> select @max_allowed_packet; //Mysql not found @max_allowed_packet
+---------------------+
| @max_allowed_packet |
+---------------------+
| NULL                |
+---------------------+
1 row in set (0.00 sec)

mysql> Select @@global.max_allowed_packet;//The new value. And I still have max_allowed_packet=32M inisde my.ini
+-----------------------------+
| @@global.max_allowed_packet |
+-----------------------------+
|                  1073741824 |
+-----------------------------+
1 row in set (0.00 sec)

So, as we can see, the max_allowed_packet has been changed outside from my.ini.

Lets leave the session and check again:

mysql> exit
Bye

C:\Windows\System32>mysql -uroot -pPassword
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 21
Server version: 5.6.26-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> SELECT CONNECTION_ID();//This is my ID for this session.
+-----------------+
| CONNECTION_ID() |
+-----------------+
|              21 |
+-----------------+
1 row in set (0.00 sec)

mysql> Select @@global.max_allowed_packet;//The new value still here and And I still have max_allowed_packet=32M inisde my.ini
+-----------------------------+
| @@global.max_allowed_packet |
+-----------------------------+
|                  1073741824 |
+-----------------------------+
1 row in set (0.00 sec)

Now I will stop the server
2016-02-03 10:28:30 - Server is stopped

mysql> SELECT CONNECTION_ID();
ERROR 2013 (HY000): Lost connection to MySQL server during query


Now I will start the server
2016-02-03 10:31:54 - Server is running


C:\Windows\System32>mysql -uroot -pPassword
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.6.26-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> SELECT CONNECTION_ID();
+-----------------+
| CONNECTION_ID() |
+-----------------+
|               9 |
+-----------------+
1 row in set (0.00 sec)

mysql> Select @@global.max_allowed_packet;//The previous new value has gone. Now I see what I have inside my.ini again.
+-----------------------------+
| @@global.max_allowed_packet |
+-----------------------------+
|                    33554432 |
+-----------------------------+
1 row in set (0.00 sec)

Conclusion, after SET GLOBAL max_allowed_packet=1073741824, the server will have the new max_allowed_packet until it is restarted, as someone stated previously.

What is the difference between a data flow diagram and a flow chart?

Data flow diagram shows the flow of data between the different entities and datastores in a system while a flow chart shows the steps involved to carried out a task. In a sense, data flow diagram provides a very high level view of the system, while a flow chart is a lower level view (basically showing the algorithm).

Whether you use data flow diagram or flow charts depends on figuring out what is it that you are trying to show.

cast a List to a Collection

Not knowing your code, it's a bit hard to answer your question, but based on all the info here, I believe the issue is you're trying to use Collections.sort passing in an object defined as Collection, and sort doesn't support that.

First question. Why is client defined so generically? Why isn't it a List, Map, Set or something a little more specific?

If client was defined as a List, Map or Set, you wouldn't have this issue, as then you'd be able to directly use Collections.sort(client).

HTH

Python 3 string.join() equivalent?

There are method join for string objects:

".".join(("a","b","c"))

Increasing heap space in Eclipse: (java.lang.OutOfMemoryError)

In Run->Run Configuration find the Name of the class you have been running, select it, click the Arguments tab then add:

-Xms512M -Xmx1524M

to the VM Arguments section

Environment Specific application.properties file in Spring Boot application

we can do like this:

in application.yml:

spring:
  profiles:
    active: test //modify here to switch between environments
    include:  application-${spring.profiles.active}.yml

in application-test.yml:

server:
  port: 5000

and in application-local.yml:

server:
  address: 0.0.0.0
  port: 8080

then spring boot will start our app as we wish to.

Using C++ base class constructors?

No, that's not how it is done. Normal way to initialize the base class is in the initialization list :

class A
{
public: 
    A(int val) {}
};

class B : public A
{
public:
  B( int v) : A( v )
  {
  }
};


void main()
{
    B b(10);
}

Regular Expressions and negating a whole character group

Just search for "ab" in the string then negate the result:

!/ab/.test("bamboo"); // true
!/ab/.test("baobab"); // false

It seems easier and should be faster too.

Concatenating bits in VHDL

The concatenation operator '&' is allowed on the right side of the signal assignment operator '<=', only

How can I join on a stored procedure?

It has already been answered, the best way work-around is to convert the Stored Procedure into an SQL Function or a View.

The short answer, just as mentioned above, is that you cannot directly JOIN a Stored Procedure in SQL, not unless you create another stored procedure or function using the stored procedure's output into a temporary table and JOINing the temporary table, as explained above.

I will answer this by converting your Stored Procedure into an SQL function and show you how to use it inside a query of your choice.

CREATE FUNCTION fnMyFunc()
RETURNS TABLE AS
RETURN 
(
  SELECT tenant.ID AS TenantID, 
       SUM(ISNULL(trans.Amount,0)) AS TenantBalance 
  FROM tblTenant tenant
    LEFT JOIN tblTransaction trans ON tenant.ID = trans.TenantID
  GROUP BY tenant.ID
)

Now to use that function, in your SQL...

SELECT t.TenantName, 
       t.CarPlateNumber, 
       t.CarColor, 
       t.Sex, 
       t.SSNO, 
       t.Phone, 
       t.Memo,
       u.UnitNumber,
       p.PropertyName
FROM tblTenant t
    LEFT JOIN tblRentalUnit u ON t.UnitID = u.ID
    LEFT JOIN tblProperty p ON u.PropertyID = p.ID
    LEFT JOIN dbo.fnMyFunc() AS a
         ON a.TenantID = t.TenantID
ORDER BY p.PropertyName, t.CarPlateNumber

If you wish to pass parameters into your function from within the above SQL, then I recommend you use CROSS APPLY or CROSS OUTER APPLY.

Read up on that here.

Cheers

Usage of MySQL's "IF EXISTS"

if exists(select * from db1.table1 where sno=1 )
begin
select * from db1.table1 where sno=1 
end
else if (select * from db2.table1 where sno=1 )
begin
select * from db2.table1 where sno=1 
end
else
begin
print 'the record does not exits'
end

How do I make the scrollbar on a div only visible when necessary?

try this:

<div style='overflow:auto; width:400px;height:400px;'>here is some text</div>

How to convert JSON to a Ruby hash

You can use the nice_hash gem: https://github.com/MarioRuiz/nice_hash

require 'nice_hash'
my_string = '{"val":"test","val1":"test1","val2":"test2"}'

# on my_hash will have the json as a hash, even when nested with arrays
my_hash = my_string.json

# you can filter and get what you want even when nested with arrays
vals = my_string.json(:val1, :val2)

# even you can access the keys like this:
puts my_hash._val1
puts my_hash.val1
puts my_hash[:val1]

How to comment out a block of Python code in Vim

one way manually

:set number
:10,12s/^/#

ImportError: No module named dateutil.parser

If you are using Pipenv, you may need to add this to your Pipfile:

[packages]
python-dateutil = "*"

How to write a Python module/package?

Make a file named "hello.py"

If you are using Python 2.x

def func():
    print "Hello"

If you are using Python 3.x

def func():
    print("Hello")

Run the file. Then, you can try the following:

>>> import hello
>>> hello.func()
Hello

If you want a little bit hard, you can use the following:

If you are using Python 2.x

def say(text):
    print text

If you are using Python 3.x

def say(text):
    print(text)

See the one on the parenthesis beside the define? That is important. It is the one that you can use within the define.

Text - You can use it when you want the program to say what you want. According to its name, it is text. I hope you know what text means. It means "words" or "sentences".

Run the file. Then, you can try the following if you are using Python 3.x:

>>> import hello
>>> hello.say("hi")
hi
>>> from hello import say
>>> say("test")
test

For Python 2.x - I guess same thing with Python 3? No idea. Correct me if I made a mistake on Python 2.x (I know Python 2 but I am used with Python 3)

How to use SortedMap interface in Java?

TreeMap, which is an implementation of the SortedMap interface, would work.

How do I use it ?

Map<Float, MyObject> map = new TreeMap<Float, MyObject>();

NSArray + remove item from array

Here's a more functional approach using Key-Value Coding:

@implementation NSArray (Additions)

- (instancetype)arrayByRemovingObject:(id)object {
    return [self filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF != %@", object]];
}

@end

Add column in dataframe from list

A solution improving on the great one from @sparrow.

Let df, be your dataset, and mylist the list with the values you want to add to the dataframe.

Let's suppose you want to call your new column simply, new_column

First make the list into a Series:

column_values = pd.Series(mylist)

Then use the insert function to add the column. This function has the advantage to let you choose in which position you want to place the column. In the following example we will position the new column in the first position from left (by setting loc=0)

df.insert(loc=0, column='new_column', value=column_values)

python requests get cookies

If you need the path and thedomain for each cookie, which get_dict() is not exposes, you can parse the cookies manually, for instance:

[
    {'name': c.name, 'value': c.value, 'domain': c.domain, 'path': c.path}
    for c in session.cookies
]

How to split data into training/testing sets using sample function

Just a more brief and simple way using awesome dplyr library:

library(dplyr)
set.seed(275) #to get repeatable data

data.train <- sample_frac(Default, 0.7)

train_index <- as.numeric(rownames(data.train))
data.test <- Default[-train_index, ]

How to draw border on just one side of a linear layout?

I was able to achieve the effect with the following code

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:left="0dp" android:right="-5dp" android:top="-5dp" android:bottom="-5dp">
        <shape
        android:shape="rectangle">
            <stroke android:width="1dp" android:color="#123456" />
        </shape>
    </item>
</layer-list>

You can adjust to your needs for border position by changing the direction of displacement

Where can I download the jar for org.apache.http package?

At the Maven repo, there are samples to add the dependency in maven, sbt, gradle, etc.

https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore/4.4.11

ie for Maven, you just create a project, for example

mvn archetype:generate -DarchetypeGroupId=org.apache.maven.archetypes -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4

then look at the pom.xml, then at the library at the dependencies xml element:

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.4.11</version>
</dependency>

For sbt do something like

sbt new scala/hello-world.g8

then edit the build.sbt to add the library

libraryDependencies += "org.apache.httpcomponents" % "httpcore" % "4.4.11"

difference between primary key and unique key

For an organization or a business, there are so many physical entities (such as people, resources, machines, etc.) and virtual entities (their Tasks, transactions, activities). Typically, business needs to record and process information of those business entities. These business entities are identified within a whole business domain by a Key.

As per RDBMS prospective, Key (a.k.a Candidate Key) is a value or set of values that uniquely identifies an entity.

For a DB-Table, there are so many keys are exist and might be eligible for Primary Key. So that all keys, primary key, unique key, etc are collectively called as Candidate Key. However, DBA selected a key from candidate key for searching records is called Primary key.

Difference between Primary Key and Unique key

1. Behavior: Primary Key is used to identify a row (record) in a table, whereas Unique-key is to prevent duplicate values in a column (with the exception of a null entry).

2. Indexing: By default SQL-engine creates Clustered Index on primary-key if not exists and Non-Clustered Index on Unique-key.

3. Nullability: Primary key does not include Null values, whereas Unique-key can.

4. Existence: A table can have at most one primary key, but can have multiple Unique-key.

5. Modifiability: You can’t change or delete primary values, but Unique-key values can.

For more information and Examples:

http://dotnetauthorities.blogspot.in/2013/11/Microsoft-SQL-Server-Training-Online-Learning-Classes-Integrity-Constraints-PrimaryKey-Unique-Key_27.html

Convert normal Java Array or ArrayList to Json Array in android

My code to convert array to Json

Code

List<String>a = new ArrayList<String>();
a.add("so 1");
a.add("so 2");
a.add("so 3");
JSONArray jray = new JSONArray(a);

System.out.println(jray.toString()); 

output

["so 1","so 2","so 3"]

How do I clone into a non-empty directory?

I liked Dale's answer, and I also added

git clone --depth 2 --no-checkout repo-to-clone existing-dir/existing-dir.tmp
git branch dev_new214
git checkout dev_new214
git add .
git commit
git checkout dev
git merge dev_new214

The shallow depth avoided a lot of extra early dev commits. The new branch gave us a good visual history that there was some new code from this server that was placed in. That is the perfect use branches in my opinion. My thanks to the great insight of all the people who posted here.

WebAPI Multiple Put/Post parameters

We passed Json object by HttpPost method, and parse it in dynamic object. it works fine. this is sample code:

webapi:

[HttpPost]
public string DoJson2(dynamic data)
{
   //whole:
   var c = JsonConvert.DeserializeObject<YourObjectTypeHere>(data.ToString()); 

   //or 
   var c1 = JsonConvert.DeserializeObject< ComplexObject1 >(data.c1.ToString());

   var c2 = JsonConvert.DeserializeObject< ComplexObject2 >(data.c2.ToString());

   string appName = data.AppName;
   int appInstanceID = data.AppInstanceID;
   string processGUID = data.ProcessGUID;
   int userID = data.UserID;
   string userName = data.UserName;
   var performer = JsonConvert.DeserializeObject< NextActivityPerformers >(data.NextActivityPerformers.ToString());

   ...
}

The complex object type could be object, array and dictionary.

ajaxPost:
...
Content-Type: application/json,
data: {"AppName":"SamplePrice",
       "AppInstanceID":"100",
       "ProcessGUID":"072af8c3-482a-4b1c??-890b-685ce2fcc75d",
       "UserID":"20",
       "UserName":"Jack",
       "NextActivityPerformers":{
           "39??c71004-d822-4c15-9ff2-94ca1068d745":[{
                 "UserID":10,
                 "UserName":"Smith"
           }]
       }}
...

Is it possible to style a select box?

If have a solution without jQuery. A link where you can see a working example: http://www.letmaier.com/_selectbox/select_general_code.html (styled with more css)

The style-section of my solution:

<style>
#container { margin: 10px; padding: 5px; background: #E7E7E7; width: 300px; background: #ededed); }
#ul1 { display: none; list-style-type: none; list-style-position: outside; margin: 0px; padding: 0px; }
#container a {  color: #333333; text-decoration: none; }
#container ul li {  padding: 3px;   padding-left: 0px;  border-bottom: 1px solid #aaa;  font-size: 0.8em; cursor: pointer; }
#container ul li:hover { background: #f5f4f4; }
</style>

Now the HTML-code inside the body-tag:

<form>
<div id="container" onMouseOver="document.getElementById('ul1').style.display = 'block';" onMouseOut="document.getElementById('ul1').style.display = 'none';">
Select one entry: <input name="entrytext" type="text" disabled readonly>
<ul id="ul1">
    <li onClick="document.forms[0].elements['entrytext'].value='Entry 1'; document.getElementById('ul1').style.display = 'none';"><a href="#">Entry 1</a></li>
    <li onClick="document.forms[0].elements['entrytext'].value='Entry 2'; document.getElementById('ul1').style.display = 'none';"><a href="#">Entry 2</a></li>
    <li onClick="document.forms[0].elements['entrytext'].value='Entry 3'; document.getElementById('ul1').style.display = 'none';"><a href="#">Entry 3</a></li>
</ul>
</div>
</form>

Why do I get "Exception; must be caught or declared to be thrown" when I try to compile my Java code?

All your problems derive from this

byte[] encrypted = cipher.doFinal(toEncrypt.getBytes());
return encrypted;

Which are enclosed in a try, catch block, the problem is that in case the program found an exception you are not returning anything. Put it like this (modify it as your program logic stands):

public static byte[] encrypt(String toEncrypt) throws Exception{
    try{
        String plaintext = toEncrypt;
        String key = "01234567890abcde";
        String iv = "fedcba9876543210";

        SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
        IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE,keyspec,ivspec);
        byte[] encrypted = cipher.doFinal(toEncrypt.getBytes());

        return encrypted;
    } catch(Exception e){
        return null;            // Always must return something
    }
}

For the second one you must catch the Exception from the encrypt method call, like this (also modify it as your program logic stands):

public void actionPerformed(ActionEvent e)
  .
  .
  .
    try {
        byte[] encrypted = encrypt(concatURL);
        String encryptedString = bytesToHex(encrypted);
        content.removeAll();
        content.add(new JLabel("Concatenated User Input -->" + concatURL));

        content.add(encryptedTextField);
    setContentPane(content);
    } catch (Exception exc) {
        // TODO: handle exception
    }
}

The lessons you must learn from this:

  • A method with a return-type must always return an object of that type, I mean in all possible scenarios
  • All checked exceptions must always be handled

Handling onchange event in HTML.DropDownList Razor MVC

The way of dknaack does not work for me, I found this solution as well:

@Html.DropDownList("Chapters", ViewBag.Chapters as SelectList, 
                    "Select chapter", new { @onchange = "location = this.value;" })

where

@Html.DropDownList(controlName, ViewBag.property + cast, "Default value", @onchange event)

In the controller you can add:

DbModel db = new DbModel();    //entity model of Entity Framework

ViewBag.Chapters = new SelectList(db.T_Chapter, "Id", "Name");

Regex how to match an optional character

You have to mark the single letter as optional too:

([A-Z]{1})? +.*? +

or make the whole part optional

(([A-Z]{1}) +.*? +)?

Shared folder between MacOSX and Windows on Virtual Box

Using a Windows 10 guest, after I performed steps 1 through 3 from @xinampc's answer, I had to open a new File Explorer and navigated to This PC > CD Drive (D:) VirtualBox Guest Additions to run VBoxWindowsAdditions. After I ran that and went through the command prompts, Windows rebooted and I was able to see VBOXSVR under Network.

Reminder - \r\n or \n\r?

If you are using C# you should use Environment.NewLine, which accordingly to MSDN it is:

A string containing "\r\n" for non-Unix platforms, or a string containing "\n" for Unix platforms.

Write to text file without overwriting in Java

You can even use FileOutputStream to get what you need. This is how it can be done,

File file = new File(Environment.getExternalStorageDirectory(), "abc.txt");
FileOutputStream fOut = new FileOutputStream(file, true);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write("whatever you need to write");
osw.flush();
osw.close();

Java 8 Streams FlatMap method example

Extract unique words sorted ASC from a list of phrases:

List<String> phrases = Arrays.asList(
        "sporadic perjury",
        "confounded skimming",
        "incumbent jailer",
        "confounded jailer");

List<String> uniqueWords = phrases
        .stream()
        .flatMap(phrase -> Stream.of(phrase.split("\\s+")))
        .distinct()
        .sorted()
        .collect(Collectors.toList());
System.out.println("Unique words: " + uniqueWords);

... and the output:

Unique words: [confounded, incumbent, jailer, perjury, skimming, sporadic]

Are PHP Variables passed by value or by reference?

You can do it either way.

Put an '&' symbol in front and the variable you are passing becomes one and the same as its origin i.e. you can pass by reference, rather than make a copy of it.

so

    $fred = 5;
    $larry = & $fred;
    $larry = 8;
    echo $fred;//this will output 8, as larry and fred are now the same reference.

Java regex to extract text between tags

A generic,simpler and a bit primitive approach to find tag, attribute and value

    Pattern pattern = Pattern.compile("<(\\w+)( +.+)*>((.*))</\\1>");
    System.out.println(pattern.matcher("<asd> TEST</asd>").find());
    System.out.println(pattern.matcher("<asd TEST</asd>").find());
    System.out.println(pattern.matcher("<asd attr='3'> TEST</asd>").find());
    System.out.println(pattern.matcher("<asd> <x>TEST<x>asd>").find());
    System.out.println("-------");
    Matcher matcher = pattern.matcher("<as x> TEST</as>");
    if (matcher.find()) {
        for (int i = 0; i <= matcher.groupCount(); i++) {
            System.out.println(i + ":" + matcher.group(i));
        }
    }

How to delete a specific file from folder using asp.net

In my project i am using ajax and i create a web method in my code behind like this

in front

 $("#attachedfiles a").live("click", function () {
            var row = $(this).closest("tr");
            var fileName = $("td", row).eq(0).html();
            $.ajax({
                type: "POST",
                url: "SendEmail.aspx/RemoveFile",
                data: '{fileName: "' + fileName + '" }',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function () { },
                failure: function (response) {
                    alert(response.d);
                }
            });
            row.remove();
        });  

in code behind

        [WebMethod]
        public static void RemoveFile(string fileName)
        {
            List<HttpPostedFile> files = (List<HttpPostedFile>)HttpContext.Current.Session["Files"];
            files.RemoveAll(f => f.FileName.ToLower().EndsWith(fileName.ToLower()));

            if (System.IO.File.Exists(HttpContext.Current.Server.MapPath("~/Employee/uploads/" + fileName)))
            {
                System.IO.File.Delete(HttpContext.Current.Server.MapPath("~/Employee/uploads/" + fileName));
            }
        }

i think this will help you.

Adding content to a linear layout dynamically?

LinearLayout layout = (LinearLayout)findViewById(R.id.layout);
View child = getLayoutInflater().inflate(R.layout.child, null);
layout.addView(child);

Get Current date & time with [NSDate date]

NSLocale* currentLocale = [NSLocale currentLocale];
[[NSDate date] descriptionWithLocale:currentLocale];  

or use

NSDateFormatter *dateFormatter=[[NSDateFormatter alloc] init]; 
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
// or @"yyyy-MM-dd hh:mm:ss a" if you prefer the time with AM/PM 
NSLog(@"%@",[dateFormatter stringFromDate:[NSDate date]]);

Can't use SURF, SIFT in OpenCV

As per June 2020, I suppose this version (pip install -U opencv-contrib-python==3.4.2.16) is still working. so install it and enjoy.

PreparedStatement with list of parameters in a IN clause

Currently, MySQL doesn't allow to set multiple values in one method call. So you have to have it under your own control. I usually create one prepared statement for predefined number of parameters, then I add as many batches as I need.

    int paramSizeInClause = 10; // required to be greater than 0!
    String color = "FF0000"; // red
    String name = "Nathan"; 
    Date now = new Date();
    String[] ids = "15,21,45,48,77,145,158,321,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,358,1284,1587".split(",");

    // Build sql query 
    StringBuilder sql = new StringBuilder();
    sql.append("UPDATE book SET color=? update_by=?, update_date=? WHERE book_id in (");
    // number of max params in IN clause can be modified 
    // to get most efficient combination of number of batches
    // and number of parameters in each batch
    for (int n = 0; n < paramSizeInClause; n++) {
        sql.append("?,");
    }
    if (sql.length() > 0) {
        sql.deleteCharAt(sql.lastIndexOf(","));
    }
    sql.append(")");

    PreparedStatement pstm = null;
    try {
        pstm = connection.prepareStatement(sql.toString());
        int totalIdsToProcess = ids.length;
        int batchLoops = totalIdsToProcess / paramSizeInClause + (totalIdsToProcess % paramSizeInClause > 0 ? 1 : 0);
        for (int l = 0; l < batchLoops; l++) {
            int i = 1;
            pstm.setString(i++, color);
            pstm.setString(i++, name);
            pstm.setTimestamp(i++, new Timestamp(now.getTime()));
            for (int count = 0; count < paramSizeInClause; count++) {
                int param = (l * paramSizeInClause + count);
                if (param < totalIdsToProcess) {
                    pstm.setString(i++, ids[param]);
                } else {
                    pstm.setNull(i++, Types.VARCHAR);
                }
            }
            pstm.addBatch();
        }
    } catch (SQLException e) {
    } finally {
        //close statement(s)
    }

If you don't like to set NULL when no more parameters left, you can modify code to build two queries and two prepared statements. First one is the same, but second statement for the remainder (modulus). In this particular example that would be one query for 10 params and one for 8 params. You will have to add 3 batches for the first query (first 30 params) then one batch for the second query (8 params).

How to print binary number via printf

printf() doesn't directly support that. Instead you have to make your own function.

Something like:

while (n) {
    if (n & 1)
        printf("1");
    else
        printf("0");

    n >>= 1;
}
printf("\n");

What are Bearer Tokens and token_type in OAuth 2?

Anyone can define "token_type" as an OAuth 2.0 extension, but currently "bearer" token type is the most common one.

https://tools.ietf.org/html/rfc6750

Basically that's what Facebook is using. Their implementation is a bit behind from the latest spec though.

If you want to be more secure than Facebook (or as secure as OAuth 1.0 which has "signature"), you can use "mac" token type.

However, it will be hard way since the mac spec is still changing rapidly.

https://tools.ietf.org/html/draft-ietf-oauth-v2-http-mac-05

What does it mean to bind a multicast (UDP) socket?

The "bind" operation is basically saying, "use this local UDP port for sending and receiving data. In other words, it allocates that UDP port for exclusive use for your application. (Same holds true for TCP sockets).

When you bind to "0.0.0.0" (INADDR_ANY), you are basically telling the TCP/IP layer to use all available adapters for listening and to choose the best adapter for sending. This is standard practice for most socket code. The only time you wouldn't specify 0 for the IP address is when you want to send/receive on a specific network adapter.

Similarly if you specify a port value of 0 during bind, the OS will assign a randomly available port number for that socket. So I would expect for UDP multicast, you bind to INADDR_ANY on a specific port number where multicast traffic is expected to be sent to.

The "join multicast group" operation (IP_ADD_MEMBERSHIP) is needed because it basically tells your network adapter to listen not only for ethernet frames where the destination MAC address is your own, it also tells the ethernet adapter (NIC) to listen for IP multicast traffic as well for the corresponding multicast ethernet address. Each multicast IP maps to a multicast ethernet address. When you use a socket to send to a specific multicast IP, the destination MAC address on the ethernet frame is set to the corresponding multicast MAC address for the multicast IP. When you join a multicast group, you are configuring the NIC to listen for traffic sent to that same MAC address (in addition to its own).

Without the hardware support, multicast wouldn't be any more efficient than plain broadcast IP messages. The join operation also tells your router/gateway to forward multicast traffic from other networks. (Anyone remember MBONE?)

If you join a multicast group, all the multicast traffic for all ports on that IP address will be received by the NIC. Only the traffic destined for your binded listening port will get passed up the TCP/IP stack to your app. In regards to why ports are specified during a multicast subscription - it's because multicast IP is just that - IP only. "ports" are a property of the upper protocols (UDP and TCP).

You can read more about how multicast IP addresses map to multicast ethernet addresses at various sites. The Wikipedia article is about as good as it gets:

The IANA owns the OUI MAC address 01:00:5e, therefore multicast packets are delivered by using the Ethernet MAC address range 01:00:5e:00:00:00 - 01:00:5e:7f:ff:ff. This is 23 bits of available address space. The first octet (01) includes the broadcast/multicast bit. The lower 23 bits of the 28-bit multicast IP address are mapped into the 23 bits of available Ethernet address space.

How can I do time/hours arithmetic in Google Spreadsheet?

I had a similar issue and i just fixed it for now

  1. format each of the cell to time
  2. format the total cell (sum of all the time) to Duration

Access-control-allow-origin with multiple domains

Try this:

<add name="Access-Control-Allow-Origin" value="['URL1','URL2',...]" />

Remove characters from C# string

new List<string> { "@", ",", ".", ";", "'" }.ForEach(m => str = str.Replace(m, ""));

Single vs double quotes in JSON

import json
data = json.dumps(list)
print(data)

The above code snippet should work.

Get AVG ignoring Null or Zero values

this should work, haven't tried though. this will exclude zero. NULL is excluded by default

AVG (CASE WHEN SecurityW <> 0 THEN SecurityW ELSE NULL END)

SVN Error - Not a working copy

Workaround: Rename directory which is not 'working copy' Checkout/update/restore this directory again Move files from renamed directory to new Commit changes

Reason: You made some changes to some files under .svn directory, this breaks 'working copy'

How to hide only the Close (x) button?

Well you can hide the close button by changing the FormBorderStyle from the properties section or programmatically in the constructor using:

public Form1()
{
InitializeComponent();
this.FormBorderStyle = FormBorderStyle.None;
}

then you create a menu strip item to exit the application.

cheers

How to escape double quotes in JSON

if you want to escape double quote in JSON use \\ to escape it.

example if you want to create json of following javascript object

{time: '7 "o" clock'}

then you must write in following way

'{"time":"7 \\"o\\" clock"}'

if we parse it using JSON.parse()

JSON.parse('{"time":"7 \\"o\\" clock"}')

result will be

{time: "7 "o" clock"}

Entity Framework (EF) Code First Cascade Delete for One-to-Zero-or-One relationship

This code worked for me

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<UserDetail>()
            .HasRequired(d => d.User)
            .WithOptional(u => u.UserDetail)
            .WillCascadeOnDelete(true);
    }

The migration code was:

public override void Up()
    {
        AddForeignKey("UserDetail", "UserId", "User", "UserId", cascadeDelete: true);
    }

And it worked fine. When I first used

modelBuilder.Entity<User>()
    .HasOptional(a => a.UserDetail)
    .WithOptionalDependent()
    .WillCascadeOnDelete(true);

The migration code was:

AddForeignKey("User", "UserDetail_UserId", "UserDetail", "UserId", cascadeDelete: true); 

but it does not match any of the two overloads available (in EntityFramework 6)

How to access List elements

Tried list[:][0] to show all first member of each list inside list is not working. Result is unknowingly will same as list[0][:]

So i use list comprehension like this:

[i[0] for i in list] which return first element value for each list inside list.

Keyboard shortcut to clear cell output in Jupyter notebook

You can setup your own shortcut in the UI (for the latest master version):

enter image description here

This menu can be found in Help > Keyboard Shortcuts in any open notebook.

How to sort a list of objects based on an attribute of the objects?

from operator import attrgetter
ut.sort(key = attrgetter('count'), reverse = True)

How to set a dropdownlist item as selected in ASP.NET?

You can use the FindByValue method to search the DropDownList for an Item with a Value matching the parameter.

dropdownlist.ClearSelection();
dropdownlist.Items.FindByValue(value).Selected = true;

Alternatively you can use the FindByText method to search the DropDownList for an Item with Text matching the parameter.

Before using the FindByValue method, don't forget to reset the DropDownList so that no items are selected by using the ClearSelection() method. It clears out the list selection and sets the Selected property of all items to false. Otherwise you will get the following exception.

"Cannot have multiple items selected in a DropDownList"

Error: select command denied to user '<userid>'@'<ip-address>' for table '<table-name>'

I had the exact same error message doing a database export via Sequel Pro on a mac. I was the root user so i knew it wasn't permissions. Then i tried it with mysqldump and got a different error message: Got error: 1449: The user specified as a definer ('joey'@'127.0.0.1') does not exist when using LOCK TABLES

Ahh, I had restored this database from a backup on the dev site and I hadn't created that user on this machine. "grant all on . to 'joey'@'127.0.0.1' identified by 'joeypass'; " did the trick.

hth