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实现(10).add(10).add(10) #255

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wuxianqiang opened this issue Mar 29, 2020 · 0 comments

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wuxianqiang commented Mar 29, 2020

Number.prototype.add = function (a) {
  let value = this.valueOf()
  function next(num) {
    value = value + num
    return value
  }
  let result = next(a)
  return result
}

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