电商sku规格

需求描述起来很简单，有这样三个数组：

let names = ["iPhone X", "iPhone XS"]

let colors = ["黑色", "白色"]

let storages = ["64g", "256g"]

需要把他们的所有组合穷举出来，最终得到这样一个数组：

[
  ["iPhone X", "黑色", "64g"],
  ["iPhone X", "黑色", "256g"],
  ["iPhone X", "白色", "64g"],
  ["iPhone X", "白色", "256g"],
  ["iPhone XS", "黑色", "64g"],
  ["iPhone XS", "黑色", "256g"],
  ["iPhone XS", "白色", "64g"],
  ["iPhone XS", "白色", "256g"],
]

编码实现

let names = ["iPhone X", "iPhone XS"]

let colors = ["黑色", "白色"]

let storages = ["64g", "256g"]

let combine = function (...chunks) {
  let res = []

  let helper = function (chunkIndex, prev) {
    let chunk = chunks[chunkIndex]
    let isLast = chunkIndex === chunks.length - 1
    for (let val of chunk) {
      let cur = prev.concat(val)
      if (isLast) {
        // 如果已经处理到数组的最后一项了 则把拼接的结果放入返回值中
        res.push(cur)
      } else {
        helper(chunkIndex + 1, cur)
      }
    }
  }

  // 从属性数组下标为 0 开始处理
  // 并且此时的 prev 是个空数组
  helper(0, [])

  return res
}

console.log(combine(names, colors, storages))