Nodejs Array Include include()

Method Source Code

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

Related

1. include(item)

   Array.prototype.include = function(item) {
     for (var i = this.length; --i >= 0; )
       if (this[i] == item)
         return true;
     return false;
   };
   

2. include(needle)

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

3. include(object)

   Array.prototype.include = function (object) {
     return this.filter((value) => {
       return JSON.stringify(value) === JSON.stringify(object);
     }).length > 0;
   };
   

4. include(val)

   Array.prototype.include = function(val) {
     return this.index(val) !== null;
   };