Nodejs Array Contain contains(item)

Method Source Code

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

Related

1. contains(element)

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

2. contains(elm)

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

3. contains(i)

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

4. 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 [];
   };
   ...
   

5. contains(item)

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

6. contains(item)

   Array.prototype.contains = function(item){
       return RegExp("(^|,)" + item.toString() + "($|,)").test(this);
   };
   

7. contains(item)

   Array.prototype.contains = function (item) {
     return RegExp("\\b"+item+"\\b").test(this);
   };
   

8. contains(item)

   Array.prototype.contains = function(item) {
       if (typeof(item) === 'function') {
           return this.some(item);
       return this.indexOf(item) >= 0;
   };
   

9. contains(item)

   Array.prototype.contains = function(item) {
     return this.indexOf(item) === -1 ? false : true