How would I read such a JSON structure?

Question

{"some_id":
    [
    {"city":"Bellevue"},
    {"state":"Washington"}
    ]
}

"open curly bracket, quote, some ID, colon, open square bracket, open curly bracket, quote, city, quote, colon, quote, Bell View, close curly bracket, comma, open curly bracket, quote, state, quote, colon, quote, Washington, quote, close curly bracket, close square bracket, close curly bracket." :D — Russell, Jul 07 '10 at 00:47
See [Alternatives to JavaScript eval() for parsing JSON](http://stackoverflow.com/questions/945015/alternatives-to-javascript-eval-for-parsing-json) and [Safely turning a JSON string into an object](http://stackoverflow.com/questions/45015/safely-turning-a-json-string-into-an-object) for a number of methods — Michael Mrozek, Jul 07 '10 at 00:48

DanC · Answer 1 · 2010-07-07T03:09:26.613

5

var theJSonString = '({"some_id": [ {"city":"Bellevue"}, {"state":"Washington"} ] })';
var x = eval(theJSonString);
alert(x.some_id[0].city); // will display "Bellevue"

edited Jul 07 '10 at 03:09

answered Jul 07 '10 at 00:46

DanC

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If you parse JSON with `eval`, you need to wrap the contents in parentheses (e.g. `eval('(' + theString + ')')`), otherwise it gets parsed as a block statement instead of an object literal. – Matthew Crumley Jul 07 '10 at 02:02
Added missing parenthesis. Thanks @Matthew Crumley – DanC Jul 07 '10 at 03:10

Germán Rodríguez · Answer 2 · 2010-07-07T00:51:21.363

3

var json = {"some_id": [ {"city":"Bellevue"}, {"state":"Washington"} ] }

json.some_id[0].city equals "Bellevue"

and

json.some_id[1].state equals "Washington"

edited Jul 07 '10 at 00:51

answered Jul 07 '10 at 00:46

Germán Rodríguez

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score 0 · Answer 3 · answered Jul 04 '12 at 01:43

All current browsers support window.JSON.parse(). It takes a JSON formatted string and returns a Javascript object or array.

Demo: http://jsfiddle.net/ThinkingStiff/KnbAJ/

Script:

var json = '{"some_id":[{"city":"Bellevue"},{"state":"Washington"}]}'
    object = window.JSON.parse( json );

document.getElementById( 'length' ).textContent = object.some_id.length;
document.getElementById( 'city' ).textContent = object.some_id[0].city;
document.getElementById( 'state' ).textContent = object.some_id[1].state;

HTML:

length: <span id="length"></span><br />
some_id[0].city: <span id="city"></span><br />
some_id[1].state: <span id="state"></span><br />

Output:

length: 2
some_id[0].city: Bellevue
some_id[1].state: Washington

score 0 · Answer 4 · answered Jul 07 '10 at 00:49

0

And this (the json parser and stringifier from json.org) might help :) (check the link at the bottom of the page)

answered Jul 07 '10 at 00:49

Dan Heberden

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How would I read such a JSON structure?

4 Answers4