json inArray return always -1 jquery

Question

I want to check if "foo" exists in the array named "Array", but $.inArray always returns -1. Why does it return -1 and how do I solve this?

Here is my code in a jsFiddle:

var Array = []
Array.push({'test':'fuu','url':'sdfsdfsdf'});
Array.push({'test':'qsgbfdsbgsdfbgsfdgb','url':'sdfssffbgsfdbgdfsdf'});
if($.inArray('fuu',Array) != -1) alert('present');
else alert('absent');
alert($.inArray('fuu',Array));

Answers are already given, so I will add mine as a comment here. See http://jsfiddle.net/B5yF2/6/ for a fix to your code with explanatory comments. — Ray Toal, Sep 29 '12 at 15:48

Explosion Pills · Accepted Answer · 2012-09-29T15:59:20.620

3

'fuu' is not actually in the array, it's a value of an object inside of the array. I'm afraid that you need a more complex check. I would also not use Array as the variable name as that's the name of the Array object, but apparently it's not a reserved word? not sure.

var arr = [];
...
var found = false;
$.each(arr, function () {
   if (this.test === 'fuu') {
      found = true;
      return false;
   }
});
if (found) alert('present');

edited Sep 29 '12 at 15:59

answered Sep 29 '12 at 15:41

Explosion Pills

188,624
52
326
405

1

To break `$.each`, you need `return false`. – pimvdb Sep 29 '12 at 15:45
@ExplosionPills How could you get the objects `index` using this method? So when `this.test === 'fuu'` is true, can we get the objects position in `arr`? – Ruddy Mar 27 '15 at 10:40
@Ruddy should be the second argument to the `$.each` callback – Explosion Pills Mar 27 '15 at 14:09
@ExplosionPills Not following you, any chance of a demo? – Ruddy Mar 27 '15 at 14:10

score 3 · Answer 2 · answered Sep 29 '12 at 15:44

3

You are pushing a Hash onto the Array

Array.push({'test':'fuu','url':'sdfsdfsdf'});

and then testing for a String.

$.inArray('fuu',Array)

If you add Array.push('fuu') then your test for present will work.

answered Sep 29 '12 at 15:44

digidigo

2,534
20
26

json inArray return always -1 jquery

2 Answers2