Remove item from JSON, 'reset' index from json obj - jquery

Question

I want to remove a specific item from my JSON object, keep the rest of the object BUT, I want that the indexes of to 'recount' or something...

    obj = {
    "0":{
        test: "test",
        test: "test"
    },
    "1": {
        test1: "test1",
        test1: "test1"
    },
    "2": {
        test2: "test2",
        test2: "test2"
    }
}

If I remove an item like

delete obj[1];

I do get the following:

    obj = {
    "0":{
        test: "test",
        test: "test"
    },
    "2": {
        test2: "test2",
        test2: "test2"
    }
}

But I would like to have to have the obj with indexes 0 and 1. Because strange enough if I ask the .length of the result (after removing the item) it gives me 3 and I need the correct length in the rest of the application.

Anyone who knows what best practice is in this case?

"Because strange enough if I ask the .length of the result (after removing the item) it gives me 3..." Not with that code it doesn't, it gives you undefined. — T.J. Crowder
– T.J. Crowder, Commented May 15, 2014 at 9:21

Rory McCrossan · Accepted Answer · 2016-11-11 15:43:21Z

1

Firstly, change the object to an array:

obj = [ {
    test: "test",
    test: "test"
},{
    test1: "test1",
    test1: "test1"
},{
    test2: "test2",
    test2: "test2"
}]

Then you can use splice() to remove an element from the array:

obj.splice(1, 1); // removes the item at index 1

This saves you the need of having to reset the index as you can just use the ordinals of the array itself.

Example fiddle

edited Nov 11, 2016 at 15:43

answered May 15, 2014 at 9:19

Rory McCrossan

338k41 gold badges322 silver badges353 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

jAndy · Accepted Answer · 2014-05-15 09:25:06Z

0

If you cannot modify the structure of that data (which basically means turning it into an ECMAscript Array), you could hack around it a bit. Basically you could turn the Object into an ECMAscript Array.

obj.length = Object.keys( obj ).length;
obj.splice = [].splice;

Now you could treat it like an ordinary Array

obj.splice(1,1);

This would remove the element at position 1. You would need to restore the integrity of that object by removing the .length and .splice properties.

delete obj.length;
delete obj.splice;

That is probably not the most elegant solution, but it will do the job.

answered May 15, 2014 at 9:25

jAndy

237k57 gold badges313 silver badges363 bronze badges

1 Comment

user3346696 Over a year ago

Ok, I know this is not the most elegant and correct solution, but as you say it's a way to reach my goal. Thanks a lot!

Collectives™ on Stack Overflow

Remove item from JSON, 'reset' index from json obj - jquery

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related