Nodejs Utililty Methods String Starts With

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

function nullOrEmpty(obj) {
    if (obj == null || obj.length == 0 || obj == 'undefined') {
        return true;
    return false;
String.prototype.startsWith = function (s) {
    return (this.indexOf(s) == 0);
};
...

String.prototype.startsWith=function(s)
  return this.substring(0,s.length)==s;
};
var defaultTrimChars=' \t\r\n';
String.prototype.trimStart=function(chars)
  chars=chars ||defaultTrimChars;
  return this.replace(new RegExp('^['+chars+']+'), '');
...

String.prototype.startsWith = function(s)
  if(s==null || this.length < s.length) return false;
  return this.substr(0,s.length) == s;
  };

String.prototype.startsWith = function(s){
    return /^s/i.test(this);
};
String.prototype.endsWith = function(s){
    return /s$/i.test(this);
};
Array.prototype.contains = function(a){
    var l = this.length;
    for(var i=0;i<l;i++){
...

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

String.prototype.startsWith = function(s, i) {
  if(i) { return s.toLowerCase() == this.substring(0, s.length).toLowerCase() }
  return s == this.substring(0, s.length)
};

String.prototype.startsWith = String.prototype.startsWith || function(search, pos) {
    'use strict';
    return this.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
};

String.prototype.startsWith = function(searchString, position) {
  position = position || 0;
  return this.indexOf(searchString, position) === position;

if (!String.prototype.startsWith) {
  String.prototype.startsWith = function(searchString, position) {
    position = position || 0;
    return this.indexOf(searchString, position) === position;
  };