All files / random from-array.ts

100% Statements 6/6

100% Branches 2/2

100% Functions 1/1

100% Lines 6/6

Press n or j to go to the next uncovered block, b, p or k for the previous block.


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 1x
 
 
 
 
1x
3x
1x
 
 
2x
 
2x
 
  import { randomNumber } from './number';
 
/**
 * returns a random item from an array, or undefined when array is empty
 */
export function randomFromArray<T>(array: T[]): T {
  if (!Array.isArray(array)) {
    throw new Error('randomFromArray must be an array');
  }
 
  const random = randomNumber(0, array.length - 1);
 
  return array[random];
}