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[英]how to access the value in a function which is defined inside a key of an object in javascript
[英]javascript variable is not defined error when try to access the value inside the object?
const roomAndReservationBinding = (rooms, reservations) => {
var roomInfo = rooms;
for (var i = 0; i <= roomInfo.length; i++) {
var room = roomInfo[i];
console.log(room.id);
}
};
// 在控制台上,我按預期打印了 ID,但在瀏覽器上,我收到以下錯誤,console.log() function 行中的房間未定義
這是根本原因-:
for (var i = 0; i <= roomInfo.length; i++) {
你正在迭代一次額外的時間,它應該是這樣的 - :
for (var i = 0; i < roomInfo.length; i++) {
const roomAndReservationBinding = (rooms, reservations) => { var roomInfo = rooms; for (var i = 0; i < roomInfo.length; i++) { var room = roomInfo[i]; console.log(room.id); } }; roomAndReservationBinding([{id:1},{id:2},{id:3}],[])
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