Get specific length random number in Java

Get specific length random number in Java:

import java.util.Random; 

public class RandomJavaProgram {

   public static void main(String []args) {

       RandomNumber RandomNumberObj = new RandomNumber();

       System.out.println(RandomNumberObj.getRandomNumber(3));

   }

}

class RandomNumber {

    public String getRandomNumber(int digitLength) {

        int[] numberContainer = new int[digitLength];

        String mainRandomNumber = "";

        Random rand = new Random();

        for ( int i = 0; i < digitLength; i++ ) {

            numberContainer[i] = rand.nextInt(10);

        }        

        for ( int j = 0; j < digitLength; j++ ) {

            mainRandomNumber = mainRandomNumber + String.valueOf(numberContainer[j]);

        }       

        return mainRandomNumber;

    }

}

Difference between COPY and volume in Docker

Difference between COPY and volume in Docker:

Volume creates a mount point that the Docker host can interact with.
COPY too can accomplish that but it does that during build time.

With Volume, you can keep interacting with the contents on the host machine but COPY is just one time activity which is used during the build time.

Get commerce product field value drupal 8

Get commerce product field value drupal 8:

In preprocess function:

function HOOK_preprocess_commerce_product(&$variables) { 

  $product = $variables['elements']['#commerce_product'];

$fieldValue = $product->get('field_name')->getValue()[0]['value'];

}

This would also work I think
$product->field_mchine_name->value

Custom captcha in wordpress and inject it to ACF front end form

 First create a file in your theme named: fcaptcha.php
fcaptcha.php

<?php 

session_start();

$permitted_chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ';

function generate_string($input, $strength = 10) {

  $input_length = strlen($input);

  $random_string = '';

  for($i = 0; $i < $strength; $i++) {

      $random_character = $input[mt_rand(0, $input_length - 1)];

      $random_string .= $random_character;

  }

  return $random_string;

}

$image = imagecreatetruecolor(200, 50);

imageantialias($image, true);

$colors = []; 

$red = rand(125, 175);

$green = rand(125, 175);

$blue = rand(125, 175); 

for ( $i = 0; $i < 5; $i++ ) {

  $colors[] = imagecolorallocate($image, $red - 20*$i, $green - 20*$i, $blue - 20*$i);

}

imagefill($image, 0, 0, $colors[0]);

$black = imagecolorallocate($image, 0, 0, 0);

$white = imagecolorallocate($image, 255, 255, 255);

$textcolors = [$black, $white];

$string_length = 6;

$captcha_string = generate_string($permitted_chars, $string_length);

$_SESSION['captcha_text'] = $captcha_string;

imagestring($image, 18, 10, 12, $captcha_string, $textcolors[rand(0, 1)]);

imagepng($image);
************************************
After that, in functions.php file put the below code to start session:

if ( ! session_id() ) {
session_start();
}

And add below lines to functions.php to localize some data:

wp_enqueue_script('jsScript', get_template_directory_uri() . '/js/script.js', array('jquery'), false, true);
$translation_array = array( 'templateUrl' => get_stylesheet_directory_uri() );
wp_localize_script( 'jsScript', 'globalJSObject', $translation_array );

script.js
$('<img/>').attr({ src: globalJSObject.templateUrl+'/fcaptcha.php', id: 'captcha_image'}).appendTo('.solution_captcha');

See the class name of solution_captcha, it can be anything but you will need to put that class in your ACF captcha field.

PWD equivalent command in Windows command prompt

pwd = echo %cd%

Take photo from video tag

Take photo from video tag:
-------------------------------------

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Run webcam into video tag</title>
    <link rel="stylesheet" href="">
</head>
<body>
    <h5>Playing video and you can take image from it</h5>
    <video width="320" id="webCamera" autoplay muted playsinline class="handsome" type='video/mp4'></video>

    <button onclick="capture()">Capture</button>

    <canvas width="320" height="360" id="PhotoEditS">
      <p>
        <font color="white">This browser does not support the required features. Please try
        <a href="http://windows.microsoft.com/en-us/internet-explorer/products/ie/home">Internet Explorer 10</a>,
                                                or a current version of
        <a href="http://www.mozilla.org/en-US/firefox/new/">Firefox</a>,
        <a href="http://www.google.com/chrome">Chrome</a>, or
        <a href="http://www.apple.com/safari/">Safari</a>.</font>
      </p>
    </canvas>

    <img id="imageTag" src="" />

    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    <script>
        // Playing video
        const video = document.getElementById('webCamera');
        startVideo();
        function startVideo(){
            var front = false;
            video.style.width = document.width + 'px';
            video.style.height = document.height + 'px';
            video.setAttribute('autoplay', '');
            video.setAttribute('muted', '');
            video.setAttribute('playsinline', '');
            var constraints = {
                audio: false,
                video: {
                    facingMode: (front ? 'user' : 'environment')
                }
            }
            navigator.mediaDevices.getUserMedia(constraints).then(function success(stream) {
                video.srcObject = stream;
            });
        }       

        function capture(){
            // Take the picture now
            var pcanvas = document.getElementById('PhotoEditS');
            pcanvas.width = video.videoWidth;
            pcanvas.height = video.videoHeight;
            pcanvas.getContext('2d').drawImage(video, 0, 0, video.videoWidth, video.videoHeight);

            var canvas      = $('#PhotoEditS')[0];
            var base64img   = canvas.toDataURL("image/png");

            $('#imageTag').attr('src', base64img);
        }
    </script>
</body>
</html>
</body>
</html>

Playing video on html5 video tag

Playing video on html5 video tag:
---------------------------------------------
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Run webcam into video tag</title>
    <link rel="stylesheet" href="">
</head>
<body>
    <h5>Playing video and you can take image from it</h5>
    <video width="320" id="webCamera" autoplay muted playsinline class="handsome" type='video/mp4'></video>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    <script>
        // Playing video
        const video = document.getElementById('webCamera');
        startVideo();
        function startVideo() {
            var front = false;
            video.style.width = document.width + 'px';
            video.style.height = document.height + 'px';
            video.setAttribute('autoplay', '');
            video.setAttribute('muted', '');
            video.setAttribute('playsinline', '');
            var constraints = {
                audio: false,
                video: {
                    facingMode: (front? 'user' : 'environment')
                }
            }
            navigator.mediaDevices.getUserMedia(constraints).then(function success(stream) {
                video.srcObject = stream;
            });
        }
    </script>
</body>
</html>