Nodejs Array Collect collect(operation)

Method Source Code

// operation is a method that accepts one parameter and returns a value.
Array.prototype.collect = function(operation) {
    var derivedArray = [];
    for (i = 0; i < this.length; i += 1) {
        derivedArray.push(operation(this[i]));
    }//from  w ww .ja  v  a2s .  c o  m
    return derivedArray;
}

Related

1. collect( func )

   Array.prototype.collect = function( func ) {
     if( $.isFunction(func) ) {
       var _arr = [];
       for( var i=0; i<this.length; i++ ) {
         var item = this[i];
         var o = func(item);
         if(o!=null) _arr.push(o);
       return _arr;
   ...
   

2. collect(collectFunction)

   Array.prototype.collect = function(collectFunction) {
       return this.inject([], function(result, element) {
           result.push(collectFunction(element));        
           return result;
       });
   };
   

3. collect(fn)

   Array.prototype.collect = function(fn) { 
     var result = [];
     for (var i = 0; i < this.length; i += 1) {
       result.push(fn(this[i]));
     return result;
   };
   

4. collect(fn)

   Array.prototype.collect = function(fn) {
     var a = [];
     for(var i = 0; i < this.length; i++) {
       a.push(fn(i, this[i]));
     };
     return a;
   };
   

5. collect(fun)

   Array.prototype.collect = function(fun) {
       var result = [];
       this.each(function(it) {
           result.push(fun(it));
       });
       return result;
   };