Nodejs String Contains contains(it) return this.indexOf(it) != -1; };

Method Source Code

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

module.exports = {//from  w  w  w.j  a va  2s . c  o m

    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];
    },
    probability: function(chances){
      return this.random(0,100) <= chances;
    }
};

Related

1. contains(it)

   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
   ...
   

2. contains(it)

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

3. contains(it)

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

4. contains(it)

   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++) {
   ...
   

5. contains(it)

   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++) {
   ...
   

6. contains(keyword)

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

7. contains(letra)

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

8. contains(matcher)

   String.prototype.contains = function(matcher) {
     const regex = new RegExp(matcher, 'i')
     return regex.test(this)
   

9. contains(needle)

   String.prototype.contains = function(needle) {
       return this.indexOf(needle) >= 0;
   };