lelinhtinh

// http://stackoverflow.com/a/8211012
var array1 = ["test1", "test2", "test3", "test4"];
var array2 = ["test1", "test2", "test3", "test4", "test5", "test6"];

var _array = new Array();

_array = jQuery.grep(array2, function(item) {
    return jQuery.inArray(item, array1) < 0;
});

lelinhtinh

// http://www.paulirish.com/2009/random-hex-color-code-snippets/
(function(m, s, c) {
    return (c ? arguments.callee(m, s, c - 1) : '#') + s[m.floor(m.random() * s.length)]
})(Math, '0123456789ABCDEF', 5);

lelinhtinh

// http://devs.forumvi.com/t571-gist-shuffle-array-dao-ngau-nhien-doi-tuong-trong-mang
var arr = [1, 2, 3, 4, 5];
/**
 * Shuffling (randomizing) the order of an array
 * http://www.javascriptkit.com/javatutors/arraysort.shtml
 */
arr.sort(function () {
   return .5 - Math.random();
});

lelinhtinh

// New version, timezone support, modern browsers
(function (dt) {
  return new Date(dt)
    .toLocaleString('vi-VN', {
      year: 'numeric',
      month: '2-digit',
      day: '2-digit',
      hour: '2-digit',
      minute: '2-digit',
      second: '2-digit',

lelinhtinh

/* http://www.jacklmoore.com/notes/rounding-in-javascript/ */
function round(value, decimals) {
    return Number(Math.round(value + 'e' + decimals) + 'e-' + decimals);
}

/* http://stackoverflow.com/a/11832950 */
Math.round(num * 100) / 100;

/* http://stackoverflow.com/a/12830454 */
parseFloat("123.456").toFixed(2);

lelinhtinh

// http://stackoverflow.com/a/8260383
function youtube_parser(url){
    var regExp = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/;
    var match = url.match(regExp);
    if (match&&match[7].length==11){
        return match[7];
    } else {
        alert("Url incorrecta");
    }
}

lelinhtinh

// http://www.midnight-coding.com/2014/05/convert-string-to-binary-to-string.html
function stringToBinary(stringValue) {
    return stringValue.replace(/.{1}/g, function (matchedString) {
        var binString = matchedString.charCodeAt(0).toString(2);
        return '00000000'.substring(0, 8 - binString.length) + binString;
    });
}

lelinhtinh

// http://www.midnight-coding.com/2014/05/convert-string-to-binary-to-string.html
function binaryToString(binValue) {
    return binValue.replace(/[01]{8}/g, function (matchedString) {
        return String.fromCharCode(parseInt(matchedString, 2));
    });
}

lelinhtinh

// http://stackoverflow.com/a/4550514
var rand = myArray[Math.floor(Math.random() * myArray.length)];

lelinhtinh

// Tiny jQuery Plugin
// by Chris Goodchild
$.fn.exists = function(callback) {
    var args = [].slice.call(arguments, 1);

    if (this.length) {
        callback.call(this, args);
    }

    return this;