数据结构

1. 随机数

• Math.random随机是均等的

const random = (range = 0.5) => {
  let times = 0
  const num = 1_000_000

  for (let i = 0; i < num; i++) {
    if (Math.random() < range) times++
  }

  return times / num
}

const random = () => {
  const accrue: Record<string, number> = {}
  const num = 1_000_000

  for (let i = 0; i < num; i++) {
    const num = (Math.random() * 10 + 1) | 0
    accrue[num] = accrue[num] ? accrue[num] + 1 : 1
  }

  return accrue
}