Nodejs Utililty Methods String Contains

String.prototype.contains = function(it) { return this.indexOf(it) != -1; };
function geturlform(addr){
  if(addr.contains('http') || addr.contains('https')){
    return "<a href='"+addr+"'>"+addr+"</a>";
  }else{
    return addr;

String.prototype.contains = function(it) {
    return this.indexOf(it) !== -1;
};

String.prototype.contains = function(it) {
  if (it instanceof Array) {
    for (var i in it) {
      if (this.indexOf(it[i]) != -1)
  return true;  
    return false;
  else
...

function arrayIncludes(value, array) {
    return array.indexOf(value) > -1;
String.prototype.contains = function(it) { 
  return this.indexOf(it) != -1; 
};

String.prototype.contains = function(it) {
  return this.indexOf(it) != -1;

String.prototype.contains = function (it) { return this.indexOf(it) != -1; };
String.prototype.pick = function (min, max) {
    var n, chars = '';
    if (typeof max === 'undefined') {
        n = min;
    } else {
        n = min + Math.floor(Math.random() * (max - min));
    for (var i = 0; i < n; i++) {
...

String.prototype.contains = function (it) { return this.indexOf(it) != -1; };
String.prototype.pick = function (min, max) {
    var n, chars = '';
    if (typeof max === 'undefined') {
        n = min;
    } else {
        n = min + Math.floor(Math.random() * (max - min));
    for (var i = 0; i < n; i++) {
...

String.prototype.contains = function(it) { return this.indexOf(it) != -1; };
module.exports = {
    random: function(low,high){
      return Math.floor(Math.random() * (high - low + 1) + low);
    },
    randomArray: function(array){
      var randomIndex = this.random(0, array.length-1);
      return array[randomIndex];
    },
...

String.prototype.contains = function(keyword) {
    var stringContainsKeyword = this.indexOf(keyword) > -1;
    return stringContainsKeyword;

String.prototype.contains = function(letra){
  return this.indexOf(letra)>-1