Function pick

src/buddy/companion.ts:39–41

(rng: () => number, arr: readonly T[])

}

function pick<T>(rng: () => number, arr: readonly T[]): T {
  return arr[Math.floor(rng() * arr.length)]!
}

function rollRarity(rng: () => number): Rarity {
  const total = Object.values(RARITY_WEIGHTS).reduce((a, b) => a + b, 0)