按值排序json对象

Question

I have a json object like below, how do I sort it using date?

json = {"date_hash":{"second_bleed":"2014-09-08","sixth_boost":"2014-10-28","first_boost":"2014-06-24","first_bleed":"2014-08-08","fifth_boost":"2014-09-30","fourth_bleed":"2014-11-03","second_boost":"2014-07-15","fourth_boost":"2014-09-02","third_bleed":"2014-10-06","primary_injection":"2014-06-02","third_boost":"2014-08-05"}}

I tried doing

json['date_hash'].sort(function(a, b){

});

Sort is not a function for json?

Answer 1

The date_hash object is a JSON object which doesn't have an order (not sortable).

You should try to use an array:

{"date_hash": [
    {"name": "second_bleed", "date": "2014-09-08"},
   ....
   {"name": "sixth_boost", "date": "2014-09-28"}
]}

and then you something similar to the function you're using to sort.

function (a, b) {
    if (a.date < b.date) {
        return -1;
    } else if (a.date > b.date) {
        return 1;
    };
    return 0;
}