Question

I was doing some test with json and ran into several issues. hope somebody on this mailing list can help out.

localStorage[LOC] = JSON.stringify(track);
            var boy = localStorage[LOC];
            alert(boy);

This is the data I get back

[{"lat":42.5877511,"lng":-71.7873177,"acc":67,"date":"Sat Apr 14 2012 01:03:46 GMT-0400 (EDT)"}]

I was wondering how I could access the json objects like we do in a regular array.

For debugging purposes I did something like,

alert(boy[0].lat);

But the result I got back was undefined

Answer 1

Run the string through JSON.parse() to get back your object:

var boy = JSON.parse(localStorage[LOC]);

JSON.parse() is essentially the opposite of JSON.stringify(). You run stringify to turn an object into a string for local storage, and when you pull the string back out of local storage, you run parse to turn the string back into an object.