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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                一般獲取對象的key值有兩種方法: ##### for...in... for...in...是遍歷對象的所有key值。 ```js function a(){ const b={"x":"c","y":"d"}; for(let key in b){ console.log(key); } } a(); ``` 輸出結果為:`"x" "y"` ##### Object.keys() Object.keys() 方法會返回一個key值的數組。 ```js function a(){ const b={"x":"c","y":"d"}; console.log(Object.keys(b)); } a(); ``` 輸出結果為:`["x", "y"]`
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