renovate/lib/util/index.ts

export function sampleSize(array: string[], n: number): string[] {
  const length = array == null ? 0 : array.length;
  if (!length || n < 1) {
    return [];
  }
  // eslint-disable-next-line no-param-reassign
  n = n > length ? length : n;
  let index = 0;
  const lastIndex = length - 1;
  const result = [...array];
  while (index < n) {
    const rand = index + Math.floor(Math.random() * (lastIndex - index + 1));
    [result[rand], result[index]] = [result[index], result[rand]];
    index += 1;
  }
  return result.slice(0, n);
}