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Remove a specific element from an array in JavaScript?

531

I have an array of integers, which I'm using the .push() method to add to.

Is there a simple way to remove a specific element from an array? The equivalent of something like array.remove(int);

I have to use core JavaScript - no frameworks are allowed.

2Answer


0

First, find the index of the element you want to remove:

var array = [2, 5, 9];
var index = array.indexOf(5);

Note: browser support for indexOf is limited; it is not supported in Internet Explorer 7 and 8.

Then remove it with splice:

if (index > -1) {
    array.splice(index, 1);
}

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

  • answered 3 years ago
  • Sandy Hook

0

I don't know how you are expecting array.remove(int) to behave. There are three possibilities I can think of that you might be wanting.

To remove an element of an array at an index i:

array.splice(i, 1);

If you want to remove every element with value number from the array:

for(var i = array.length - 1; i >= 0; i--) {
    if(array[i] === number) {
       array.splice(i, 1);
    }
}

If you just want to make the element at index i no longer exist, but you don't want the indexes of the other elements to change:

delete array[i];
  • answered 3 years ago
  • Sunny Solu

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