JSON object value based on other object value

Question

I need to find a value based on another object value

json = {[{ID:"1",city:"Atlanta"},{ID:"2",city:"New York"}]}

and so forth.

I need to find the value of a city where ID is x. Is there anyway to do it without using loops?

More Details: I have to create a json object looping thru the document, then I send this json to the webservice, which return me another set of json to populate the fields.

Answer 1

You could consider using JSONPath, JSONQuery, jLinq, etc... although under-the-hood there's a very good chance they will use loops.

Answer 2

Why don't you store this like an array

array = ["Atlanta", "New York"];

Calling array[0] will return "Atlanta".

If you have to use json you will need to use loops to do what you want.

Answer 3

You could format it as follows

var data = {
    id: "city",
    1: "Atlanta",
    2: "New York",
    6: "New Jersy",
    24: "San Diego"
};

At which point, access can be done using the ID and the array access operator

console.log(data[2], data[24]);

yields

New York San Diego