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String.prototype.replaceAll = function(find, replace) {
  
  if(typeof find === 'string')
    return this.split(find).join(replace);
  
  var str = this;
  
  find.forEach(function(el, i){
    str = str.split(el).join(replace[i]);
  });

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-- 1. Создаем временную таблицу с правильными записями
CREATE TABLE tmp_users
SELECT * FROM users AS u
GROUP BY u.login 
HAVING COUNT(u.login) >= 1
 
-- 2. Переносим данные из tmp_users в users
-- предварительно очистив users
INSERT INTO users 
SELECT * FROM tmp_users

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({
    css: function(el, prop){
        /*return css-prop*/
    },
    ajax: function(options){
        /*make ajax-request*/
    },
    init: function(name){
        var cache = {};
        this.getCache = function(){ return cache };

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var age = 'think';
switch (true) {    
  case (/think/g).test(age):  
    console.log("Think!");  
    break;  
  default:  
    console.log("not found"); 
    break;  
};  

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var Field = function(selector){
  
  var el = document.querySelector(selector),
      callback;

  this.get = function() {
    return el.value;
  };
  
  this.set = function(val) {

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var $scope = (function($){
  var _this = {
    name: 'Alex'
  };
  return {
    get: function(prop){
      return _this[prop];
    },
    set: function(prop, val){
      return _this[prop] = val;

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Array.prototype.remove = function(id){
  return this.splice(id, 1);
}

var a = ["a","b","c","d"];
a.remove(2);

console.log(a);
// ["a", "b", "d"]

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var _cookie = {
    getCookie: function (name) {
        var matches = document.cookie.match(new RegExp(
            "(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
        ));
        return matches ? decodeURIComponent(matches[1]) : undefined;
    },
    setCookie: function (name, value, options) {
        options = options || {};

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var player = {
  play: function(music){
    console.info('player plaing: ', music);
  }
};

var search = {
  items: {
    a: 'ABBA',
    b: 'Boney M',

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var isMobile = function(){
    return /Mobi|Mini|Symbian|SAMSUNG|Nokia|BlackBerry|Series|Bada|SymbOS|PLAYSTATION/g
	    .test(navigator.userAgent.toString());
};