這是模擬家中咖啡機的狀態
- off
- warming
- ready
- running
- power
- brew
- 想知道在不同狀態時，按下 brew 鈕如何精準的控制
- 而不需像以往用一堆 if/else
- 目前看來 fsm 能讓事件變單純條理化
- 只要乖乖找到正確的 state 加上控制式即可
- 確實比 if/else 好
- 實驗 head first design patterns 中說的 state pattern
- 煮到一半沒水了，要等加完水再繼續
- 總結大致上就是由 state 跟 transition 來決定要做什麼事，避免在 UI or I/O events 裡面重複 if/else 確認目前的 state
- 總結大致上是儘量縮小 variable 的 scope，可以的話用 passing variable 取代 flag
React
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Some thing interesting about web. New door for the world.
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