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For example:

var Cars = {
    1: { "Make": "Honda",
         "Model": "Accord",
         "Color": "Red"
    },
    2: { "Make": "Honda",
         "Model": "Civic",
         "Color": "Silver"
    },
    3: { "Make": "Honda",
         "Model": "Jazz",
         "Color": "Yellow"
    }

If I do a delete.Cars[2]; I will be left with Cars[1] and Cars[3].

I need a way (JS or jQuery) so that when I delete a key, the object reindexes. So, in the example above, I'm left with Cars[1] and Cars[2] (which was Cars[3]).

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4  
Is there a reason you arent using an actual array? – Richard Dalton Nov 29 '11 at 11:57
If you use an array, this question has your answer- stackoverflow.com/questions/500606/… – Richard Dalton Nov 29 '11 at 12:01
Because you can't have multiple dimensions, I've just checked. – jdborg Nov 29 '11 at 12:01
But you haven't got multiple dimensions :D – Richard Dalton Nov 29 '11 at 12:02
You can have an array of arrays, or an array of objects. (So wherever you checked didn't give all the information.) – nnnnnn Nov 29 '11 at 12:03
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2 Answers

up vote 2 down vote accepted

That is because you dont need the keys for the array.

var Cars = [
    {
        "Make": "Honda",
        "Model": "Accord",
        "Color": "Red"
    },{
        "Make": "Honda",
        "Model": "Civic",
        "Color": "Silver"
    },{
        "Make": "Honda",
        "Model": "Jazz",
        "Color": "Yellow"
    }
];

alert(Cars[1]['Make']); // Honda
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Thanks! This works perfectly with splice. – jdborg Nov 29 '11 at 12:32
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up vote 1 down vote

You can have a look at this:

Array: Javascript - Reindexing an array

Object: Algorithm to re-index an array of objects after insertion or drag 'n' drop order change

It should do the trick :)

Referencing other developers in this thread, and myself, it will be better to use an Array.

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I saw that, will it work with objects like this? – jdborg Nov 29 '11 at 12:03
1  
Not. Stop using them and use Array instead. (Well, in fact, it can help, if you do Array.prototype.splice.call(theStrangeObject, 2, 1) instead of delete theStrangeObject[2]... but no, it does not help, you have no length there. Use Array). – herby Nov 29 '11 at 12:17
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