Getting random elements from arrays

Posted on

We can combine Math.random() with the array accessor to get a random element from an array.

// get a random element from the given array
const sample = array => array[Math.floor(Math.random() * array.length)]
 
// every time we use `sample`, it returns a random element
sample([17, 6, 22, 13, 9])  // ⇒ 13 (maybe)
sample([17, 6, 22, 13, 9])  // ⇒ 6  (maybe)
sample([17, 6, 22, 13, 9])  // ⇒ 6  (maybe)
sample([17, 6, 22, 13, 9])  // ⇒ 17 (maybe)
// get a random element from the given array
const sample = array => array[Math.floor(Math.random() * array.length)]
 
// every time we use `sample`, it returns a random element
sample([17, 6, 22, 13, 9])  // ⇒ 13 (maybe)
sample([17, 6, 22, 13, 9])  // ⇒ 6  (maybe)
sample([17, 6, 22, 13, 9])  // ⇒ 6  (maybe)
sample([17, 6, 22, 13, 9])  // ⇒ 17 (maybe)
Debug
none
Grid overlay