Nodejs Utililty Methods String Starts With

String.prototype.startsWith = function(str) {
  return this.indexOf(str) == 0;
};

'use strict';
app.filter('urlFilter', function () {
  return function (link) {
    var result;
    var startUrl = "http://";
    if (link.startsWith("www")) {
      result = startUrl + link;
    else if(link.startsWith("http")) {
...

String.prototype.startsWith=function(str){
    if(str==null||str==""||this.length==0||str.length>this.length)
      return false;
    if(this.substr(0,str.length)==str)
      return true;
    else
      return false;
    return true;
};
...

String.prototype.startsWith = function(str) {
  return this.indexOf(str) == 0;
};

String.prototype.startsWith = function(str) {
  return (this.match('^'+str)==str)

String.prototype.startsWith = function(str) {
    var len = str.length;
    if (len > this.length) { return false; }
    return this.substring(0, len) === str;
};

String.prototype.startsWith = function(str){
    return (this.toString().substr(0, str.length) == str);
};

String.prototype.startsWith = function(str){
  return this.indexOf(str) === 0;
};

var net = require('net');
var fs = require('fs')
var port = 3000;
var clients = [];
String.prototype.startsWith = function(str) {
  return this.indexOf(str) === 0;
var server = net.createServer(function(socket) {
  console.log('client connected');
...

String.prototype.startsWith = function(str) {
  return this.substring(0, str.length) === str;
};