JavaScript获得指定对象大小的方法

function objectSize(the_object) { /* function to validate the existence of each key in the object to get the number of valid keys. */ var object_size = 0; for (key in the_object){  if (the_object.hasOwnProperty(key)) {   object_size++;  } } return object_size;}

// Arbitrary objectvar something = { dog: "cat", cat: "dog"}console.log(objectSize(something));// Logs: 2