Javascript Array myReduce( func )

// Array.prototype.reduce( func )

Array.prototype.myReduce = function( func ){

 if( this.length === 0) return 'Empty aray';
 if( this.length === 1) return this[0];

 var valA = this[0];
 var valB = this[1];
 var valZ = func(valA, valB)
 var slicedArr = this.slice(2);
 slicedArr.unshift(valZ);/*from w ww.  j a va  2  s .  co m*/
 return slicedArr.myReduce( func );
}


function suma( preValue, value ){
 return preValue + value;
}