Nodejs Array Contain contains(what)

Method Source Code

Array.prototype.contains = function (what) {
  var contains = false;

  //do a strict comparison
  if (typeof what !== 'function') {
    this.forEach(function (item) {
      if (contains) return;
      contains = (item === what);/*w  ww.j  ava  2 s.c om*/
    });
    return contains;
  }

  //compare with an evaluator
  this.forEach(function (item) {
    if (contains) return;
    contains = what(item);
  });
  return contains;
};

Related

1. contains(value)

   Array.prototype.contains = function(value) {
       return Array.prototype.indexOf.call(this, value) !== -1;
   };
   

2. contains(value)

   Array.prototype.contains = function(value) {
       return (this.indexOf(value) > -1);
   

3. contains(value)

   "use strict";
   Array.prototype.contains = function(value){
     var n = this.length
     for (var i = 0; i < n; i++){
       if (this[i] == value) return true
     return false
   

4. contains(value)

   Array.prototype.contains = function(value) {
     return this.indexOf(value) !== -1;
   };
   Array.prototype.remove = function(value) {
     var index = this.indexOf(value);
     if ( index !== -1 ) {
       this.splice(index, 1);
   };
   ...
   

5. contains(value)

   Array.prototype.contains = function(value) {
     for(var i=0; i < this.length; i++) {
       if(this[i] === value)
             return true;
     return false;
   };
   

6. contains(x)

   Array.prototype.contains=function(x){
    for(i in this){
      if((x.city==this[i].city || x.firstName==this[i].firstname || x.lastName==this[i].lastname))
        return true;
    return false;
   

7. contains(x)

   Array.prototype.contains = function (x) {
       return this.indexOf(x) > -1;
   };
   

8. containsAll(c)

   Array.prototype.containsAll = function(c) {
       for (var i = c.length - 1; i >= 0; i--) {
           if (!this.contains(c[i])) {
               return false;
       return true;
   };
   

9. containsAll(elements)

   Array.prototype.containsAll = function(elements) {
     for (var i = 0; i < elements.length; i++) {
       if (!this.contains(elements[i])) {
         return false;
     return true;
   };