JavaScript array delete an element from an index

Question

Hi folks I have the following array

const options = [
    'option one', 
    'option two', 
    'some other random string', 
    'another random string', 
    'option last one', 
]

If I want to remove something from the middle of this array which also update the indexes, I tried delete arr[ind] but that does not update the index. Want to completely remove from that array.

Regards

Joshua Obritsch · Accepted Answer · 2019-12-28 18:50:33Z

1

You can try to filter it out by index.

options.filter((item, index) => index !== 3);

Or by name:

options.filter((item) => item !== 'option one');

answered Dec 28, 2019 at 18:50

Joshua Obritsch

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3 Comments

Joshua Obritsch Over a year ago

It works for me in my terminal. How is it not working?

Joshua Obritsch Over a year ago

You need to reassign the above-mentioned expressions to a new variable and it will contain the old data minus the condition.

laurent Over a year ago

If for some reason, you have to keep the same array reference. you can simply use the splice method: options.splice(ind, 1)

Hashem Taha · Accepted Answer · 2019-12-28 19:35:52Z

1

you can use splice as

options.splice(index,1)

if you want to use the filter method you should store the result because filter method does not mutate the array on which it is called, but returns a new array.

answered Dec 28, 2019 at 19:35

Hashem Taha

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2 Comments

Muhammad Sharif Over a year ago

Thank you @Hashem Taha, this is even better I would have accepted your answer but I have already accepted Joshua Obritsch answer.. thank you

Joshua Obritsch Over a year ago

Actually, I thought that because this thread was tagged with reactjs, it would be better not to mutate the array, as that wouldn't trigger a re-render. This is of course assuming the array is stored in state.

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