"use strict"; 
function objMap(obj, func, context){ 
if (!obj) { 
return null ; 
} 
var i = 0; 
var ret = { 
}
; 
for (var key in obj){ 
if (obj.hasOwnProperty(key)) { 
ret[key] = func.call(context, obj[key], key, i++ ); 
} 
} 
return ret; 
} 
module.exports = objMap;