Nodejs Array Contain contains(element)

Method Source Code

Array.prototype.contains = function(element) {
   if(!element)/*from  w w  w  .ja v a2  s .co m*/
   {
      return false;
   }
   for (var e in this) {
      var arrayElement = this[e];
      if(element == arrayElement) {
         return true;
      }
      //this is introduced to check the reverse names of states, since state AB is equal to state BA
      if(((typeof arrayElement) == "string") && ( element == arrayElement.split('').reverse().join(''))){
         return true;
      }
   }
   return false;
}

Related

1. contains(element)

   Array.prototype.contains = function(element) {
     return (-1 !== this.indexOf(element))
   

2. contains(element)

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

3. contains(element)

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

4. contains(element)

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

5. contains(element)

   Array.prototype.contains = function(element) {
       return (arrValues.indexOf(element) > -1);
   

6. contains(element)

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

7. contains(elm)

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

8. contains(i)

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

9. contains(index, obj)

   var twoSum = function(nums, target) {
     for (var i = nums.length - 1; i >= 0; i--) {
       let val = target - nums[i];
       if (nums.contains(i, val) === true) {
         return [nums.indexOf(val), i];
     return [];
   };
   ...