Function shuffle

packages/effect/src/Random.ts:206–216

(elements: Iterable<A>)

 * @since 2.0.0
 */
export const shuffle = <A>(elements: Iterable<A>): Effect.Effect<Array<A>> =>
  randomWith((r) => {
    const buffer = Array.from(elements)
    for (let i = buffer.length - 1; i >= 1; i = i - 1) {
      const index = Math.min(i, Math.floor(r.nextDoubleUnsafe() * (i + 1)))
      const value = buffer[i]!
      buffer[i] = buffer[index]!
      buffer[index] = value
    }
    return buffer
  })

/**
 * Gets a random element from an iterable.