Nodejs Array Has Object hasObject(

Method Source Code

Array.prototype.hasObject = (
  !Array.indexOf ? function (o)
  {//from  w  ww .j  a  va 2s.c  o m
    var l = this.length + 1;
    while (l -= 1)
    {
        if (this[l - 1] === o)
        {
            return true;
        }
    }
    return false;
  } : function (o)
  {
    return (this.indexOf(o) !== -1);
  }
);

Related

1. hasObject(o)

   Array.prototype.hasObject = function (o)
       var l = this.length + 1;
       while (l -= 1)
           if (this[l - 1].name === o.name)
               return true;
       return false;
   

2. hasObject(o)

   Array.prototype.hasObject = (!Array.indexOf ? function (o) {
     var l = this.length + 1;
     while (l--) {
       if (this[l - 1] === o) {
         return true;
     return false;
   } : function (o) {
   ...
   

3. hasObjectExists(item)

   Array.prototype.hasObjectExists = function(item) {
       for (i = 0; i < this.length; i++) {
           if(this[i].id == item.id){
               return true;
       return false;
   };