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

ES6 way:

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

We wanna replace 3452 with 1010, solution:

const newItems = items.map(item => item === 3452 ? 1010 : item);

Surely, the question is for many years ago and for now I just prefer to use immutable solution, definitely, it is awesome for ReactJS.

For frequent usage I offer below function:

const itemReplacer = (array, oldItem, newItem) =>
  array.map(item => item === oldItem ? newItem : item);