如何动态添加到JavaScript对象？

Question

I can't seem to figure out how to get the following results...

var errors;
errors = { username: "username_error", email: "email_error" };

...when looping through data in this code:

var errors = {}
$.each(data,function(k,v)
{
   errors[k] = v; // doesn't seem to work
});

It does produce an object yet in a different format.

EDIT: console log.

Expected results:

Object
email: "email_error"
username: "username_error"
__proto__: Object
 edit:25
Object
__proto__: Object

Generated results:

Object
email: Array[1]
0: "email_error"
length: 1
__proto__: Array[0]
username: Array[1]
0: "username_error"
length: 1
__proto__: Array[0]
__proto__: Object

Answer 1

By the results you posted with the log output, it seems the objects in data are arrays. Try replacing the assignment with this:

errors[k] = v.length>0 ? v[0] : ""

Answer 2

Try this

var errors = {}
$.each(data,function(k,v)
{
   errors[k] = v[0];

});

DEMO .