什麼是高階函數和純函數？

原創 flitrue 2020-06-21 16:27

高階函數是一個接收函數作爲參數或將函數作爲輸出返回的函數。

純函數的三個條件：

  • 給定輸入，無論什麼時候調用，無論調用多少次，輸出總是確定無疑的；
  • 在函數內部不可以改變函數外部對象的狀態；
  • 純函數內部的狀態在純函數執行完畢後就被銷燬了；
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