On Mar 20, 8:03 pm, Angelo Chen <angelochen...@gmail.com> wrote:
> when a json is json.stringify and parse back to json later, the date
> is different:
Right, because there is no special Date type in JSON, it has to
convert it to a string. When parsing that string back again, the JSON
parser can't assume any strings are necessarily a Date, so it just
keeps them as strings. You have to convert those manually. One way to
do this is to pass a callback to JSON.parse() as a second argument,
and it will execute the callback with the key and value as arguments.
Then it's just a matter of returning the original or transformed value
from that callback. You can also returned `undefined` to delete the
current value.
> var s = '{"id":1,"d":"2012-03-20T23:55:10.352Z"}';
undefined
> var o = JSON.parse(s, function(key, val) {
... if (key === 'd') // or perhaps checking val using a regex
... val = new Date(val);
... return val;
... });
undefined
> o
{ id: 1, d: Tue, 20 Mar 2012 23:55:10 GMT }
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