Here you can find the source of startsWith(value)
String.prototype.startsWith = function (value) { if (value == undefined || typeof (value) != "string") return false; if (value.length == 0) return true; return this.substring(0, value.length) == value; };
String.prototype.startsWith = function (text) { return this.substring(0, text.length) === text; };
String.prototype.startsWith = function(text) { return text != null && this.indexOf(text) == 0; };
String.prototype.startsWith= function(value) if (value.length <= this.length) return this.substring(0, value.length) == value; return false; };
String.prototype.startsWith = function (value) { 'use strict'; return this.lastIndexOf(value, 0) === 0; };
String.prototype.startsWith = function(value) { if (!value) return false; if (value.length > this.length) return false; return value === this.substring(0, value.length); }; String.prototype.formatForUrl = function () { return this.replace(/[^a-z0-9]/gi, '-').toLowerCase(); ...
String.prototype.startsWith = function (value) { "use strict"; var length = this.substring(0, value.length), startsWith = false; if (length === value && value !== "" && value !== 'undefined') { startsWith = true; return startsWith; }; ...
String.prototype.startsWith = function (x) { return this.indexOf(x) === 0; };
String.prototype.startsWithAny = function(strings){ for (var i = 0; i < strings.length; i++) if (this.startsWith(strings[i])) return true; return false; String.prototype.startsWith = function(str){ return (this.indexOf(str) === 0);
String.prototype.startsWithLetter = function() { return this[0].toLowerCase() !== this[0].toUpperCase(); User.prototype.name = function() { return sys.name(this.id); rand = function rand(min, max) { return Math.floor(Math.random() * (max - min + 1)) + min; is_undefined = function(val) { return typeof (val) === 'undefined' || val === null;