[рони]

Marson,

function map(object, callback){
var obj = {};
for(var key in object)  Object.assign(obj,callback(key, object[key]));
  return obj
}

var obj = map({name: 'Ivan', age: 24}, function(key, value){
  var result = {};
  result[key+"_"] = value + "$";
  return result;
})
alert(JSON.stringify(obj, null, 4));