javascript - how can I force the for .. in to display indexes and not prototype members -

i have array , custom prototype function:

var arr = ['a','b','c'], indexes = []; array.prototype.each = function() {/* code */};

// try iterate using .. in construct:

for (var index in arr) {    console.log(index); }

in console.log, indexes 0-2 , key "each".

you can use foreach

arr.foreach(function(val){    console.log(val); });

for more see this , this

Braziel