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並前往https://developer.mozilla.org/zh-TW/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwnProperty

Object.prototype.hasOwnProperty() - JavaScript - MDN Web ...

每個為 Object 後代的物件都繼承 hasOwnProperty 方法。 ... Value: ' + buz[name]); } else { console.log(name); // toString or something else } }

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