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?

Answer 1

formData.objectiveDetails.splice(5, 1)

第一个参数是数组索引，第二个参数是从该索引开始删除的项目数。

Answer 2

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

formData.objectiveDetails.splice(5, 1)

Answer 3

使用underscore.js

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