A lightning-fast crash course on JavaScript, the world’s most popular programming language. From its 1995 origins as Mocha in ...

Severe thunderstorm, dust storm, flash flood warnings were issued by the National Weather Service in Phoenix on Wednesday, Sept. 3.

Node.js 為什麼需要 Event Loop？ Node.js 是基於單線程（single-thread）架構，也就是只有一條執行緒在跑程式碼。 這樣的設計優點是簡單且節省資源，但缺點是如果遇到需要等待的操作（例如讀檔、網路請求），整個程式就會被「卡住」無法繼續。

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