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

Answer from @gilly3 is great.

How to extend this for array of objects

I prefer the following way to update the new updated record into my array of records when I get data from the server. It keeps the order intact and quite straight forward one liner.

users = users.map(u => u.id !== editedUser.id ? u : editedUser);

var users = [
{id: 1, firstname: 'John', lastname: 'Sena'},
{id: 2, firstname: 'Serena', lastname: 'Wilham'},
{id: 3, firstname: 'William', lastname: 'Cook'}
];

var editedUser = {id: 2, firstname: 'Big Serena', lastname: 'William'};

users = users.map(u => u.id !== editedUser.id ? u : editedUser);

console.log('users -> ', users);