Object.prototype,map

`
Object.prototype.map = function(callback){
  if(typeof callback !== "function"){
    throw new TypeError("param must be a Function")
  }
  const newObj = {}
  for(const key in this){
    if(this.hasOwnProperty(key)){
      newObj[key] = callback(this[key],key,this)
    }
  }
  return newObj
}

`