JavaScript, how to replace items in an array

Given an array, if you know the index of an item, you can replace its contents with a simple assignment:

const items = ['a', 'b', 'c', 'd', 'e', 'f']
const i = 2

items[i] = ‘–NEW-ITEM–’

console.log(items) //[ ‘a’, ‘b’, ‘–NEW-ITEM–’, ‘d’, ‘e’, ‘f’ ]

If you don’t know the index of the item, you may need toFind the index of the item in the array.

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