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

As TJ said, inArray uses === (indexOf actually, but that's the same thing), therefore even identical literals are compared non equal. Here's a workaround:

var index = jQuery.inArray( 
    JSON.stringify({"id" : "2", "description" : "two"}), 
    $.map(arr, JSON.stringify) )

http://jsfiddle.net/7kg9P/1/