CODEWITHSUNDEEP
javascriptarrayssplice
Michael Longhurst
Michael Longhurst

Reputation: 1900

Delete item from JavaScript array with arbitrary numerical indexes

I'm having trouble figuring how to delete an item from array where the items are indexed in a manner similar to the following:

arr[32] = 123
arr[39] = 456
arr[92] = 789
...

The two ways I have tried to delete single, specific items from said array have resulted in all items being removed.

Attempted Method #1:

arr.splice(39, 1);

Attempted Method #2:

arr.forEach(function(val, key) {
    if (val == 456) {
        arr.splice(key, 1);
    }
}

Now obviously this isn't exactly what my code looks like, but it shows what I've tried well enough. If I am missing any important details, or you want me to pick the code from source to see if it is within the source instead of the methodology, please ask

Upvotes: 0

Views: 40

Answers (1)

Nina Scholz
Nina Scholz

Reputation: 386680

While splicing changes the length of the array and the given array seems to rely on indices, you could just set the item to undefined.

var arr = [];

arr[32] = 123;
arr[39] = 456;
arr[92] = 789;

arr[39] = undefined;

console.log(arr[92]);

Upvotes: 2

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