引起錯誤的TypeScript代碼：

test(){const a = () => ({ a , b = 2 } = {}): number => 11;}

該編譯錯誤的解決方法1

test(){const a = () => ({ a , b = 2 }:any = {}): number => 11;}

解法2

test(){const a = () => ({ a = 1, b = 2 } = {}): number => 11;}

解法3

test(){const fun = () => ({ a , b } = { a: 1, b: 2}): number => 11;}

參考：https://stackoverflow.com/questions/57527710/how-to-fix-initializer-provides-no-value-for-this-binding-element-and-the-bindi

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