How to replace an item in an array with JavaScript?

Question

Each item of this array is some number.

var items = Array(523,3452,334,31, ...5346);

How do I replace some number in with array with a new on

Answer 1

First method

Best way in just one line to replace or update item of array

array.splice(array.indexOf(valueToReplace), 1, newValue)

Eg:

let items = ['JS', 'PHP', 'RUBY'];

let replacedItem = items.splice(items.indexOf('RUBY'), 1, 'PYTHON')

console.log(replacedItem) //['RUBY']
console.log(items) //['JS', 'PHP', 'PYTHON']

Second method

An other simple way to do the same operation is :

items[items.indexOf(oldValue)] = newValue