function sayKeyName(obj){ function sayName(obj){ if (!(obj instanceof Array) && !(obj instanceof Object)) { throw new TypeError(‘obj 類型錯誤！‘); } if (obj instanceof Array) { for (var i = 0; i < obj.length; ++i) { console.log(‘對象屬性名：‘ , i); if (obj[i] instanceof Object) { sayName(obj[i]); } } } else { for (var key in obj) { console.log(‘對象屬性名：‘ , key); if (obj[key] instanceof Object) { sayName(obj[key]); } } } } sayName(obj); } var obj = [ {a: [ { b:1, c:[ {d:1}, {e:1} ] }, {f:1} ] } ]; sayKeyName(obj);

js備忘錄4