How can I completely remove an object from an array in Javascript?

Question

I have been using the following code:

formData.objectiveDetails.push(emptyObjectiveDetail);

This pushes a new emptyObjectiveDetail object onto the end of an array called objectiveDetails.

If for example the array of objectiveDetails contains 13 objects then how could I remove the one at position 5? I assume I could make this null but what I want to do is to completely remove it so the length of the array becomes 12.

This might be off topic but I have been considering adding underscore.js. Is this something that could be done with underscore?

slash197 · Accepted Answer · 2013-08-10 05:15:52Z

5

formData.objectiveDetails.splice(5, 1)

First argument is the array index and the second the number of items to remove starting from that index.

answered Aug 10, 2013 at 5:15

slash197

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Rahul Tripathi · Accepted Answer · 2013-08-10 05:15:53Z

5

You can use Splice to remove the object from the array. Something like this:-

formData.objectiveDetails.splice(5, 1)

answered Aug 10, 2013 at 5:15

Rahul Tripathi

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1 Comment

Alan2 Over a year ago

Okay that looks good. So I guess underscore isn't really needed here. If I was using underscore would there be an equivalent?

geekchic · Accepted Answer · 2013-08-10 05:17:55Z

1

Using underscore.js

objectiveDetails = _.without(objectiveDetails, _.findWhere(arr, {id: 5}));

answered Aug 10, 2013 at 5:17

geekchic

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2 Comments

Alan2 Over a year ago

Thanks very much. Actually it looks a bit more complicated than not using _underscore. If you were doing this would you use splice or underscore?

geekchic Over a year ago

Well, if you just needed it for this particular operation, I would go with splice. But if you needed more specific function helpers, then I'd add underscore.js

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