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                * 使用數組成員對變量賦值時,優先使用解構賦值。 ``` const arr = [1, 2, 3, 4]; // bad const first = arr[0]; const second = arr[1]; // good const [first, second] = arr; ``` * 函數的參數如果是對象的成員,優先使用解構賦值 ``` // bad function getFullName(user) { const firstName = user.firstName; const lastName = user.lastName; } // good function getFullName(obj) { const { firstName, lastName } = obj; } // best function getFullName({ firstName, lastName }) { } ``` * 如果函數返回多個值,優先使用對象的解構賦值,而不是數組的解構賦值。這樣便于以后添加返回值,以及更改返回值的順序 ``` // bad function processInput(input) { return [left, right, top, bottom]; } // good function processInput(input) { return { left, right, top, bottom }; } const { left, right } = processInput(input); ``` * 重命名解構 ``` let {foo:foo_ex} = {foo:'foo_ex'}; foo_ex = 'foo_ex'; ```
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