Why jQuery.inArray doesn't work on array of objects

Question

I have array of objects

var arr = [
        {\"id\" : \"1\", \"description\" : \"one\"},
        {\"id\" : \"2\", \"description\" : \"two\"},
        {\"id\"         


        

Answer 1

Because inArray uses === to compare elements, and different objects are never === to one another. (They're also not == to one another.)

E.g.:

var a = {"foo": "bar"};
var b = {"foo": "bar"};
console.log(a === b); // "false"

You'll need to create a method on them to compare them for equivalence, and then do the search yourself.