javascript - Create two functions to counts object properties/methods -

object.size = function(obj){ var size = 0, key = "";    for(key in obj){       if(obj.hasownproperty(key)){         size++;       }    }   return size; } 

this first function created. mission create 2 functions, 1 counts properties , other 1 counts properties , methods. (limit counting original objec, need add functions object prototype each object create has 2 functions available automatically property.)

so how do second function? (and please take @ first 1 , see if did wrong in first function?) thank much!

number of properties , methods:

object.keys(obj).length 

number of properties:

#test used underscore.js function ismethod(obj, func) {     return !!(obj.func && obj.func.constructor && obj.func.call && obj.func.apply); }  function num_properties(obj){        var size = 0;     for(key in obj){         if (!ismethod(obj, key)){             size++;         }     }     return size; }