回答編集履歴
2
Symbol.iterator
test
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@@ -1,3 +1,5 @@
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### new Map
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> ```javascript
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> return schedules = {
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> title: title,
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@@ -29,4 +31,30 @@
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for (let [key, value] of schedule) console.log(key + ': ' + value);
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```
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### Symbol.iterator
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`Symbol.iterator` を使用することで、iterableなオブジェクトを生成することができます。
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- [Symbol\.iterator \- JavaScript \| MDN](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol/iterator)
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```javascript
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'use strict';
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class Schedule {
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constructor (title, startHour, startMinute, endHour, endMinute) {
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this.title = title;
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this.startHour = startHour;
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this.startMinute = startMinute;
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this.endHour = endHour;
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this.endMinute = endMinute;
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}
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[Symbol.iterator] = function* () {
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for (let key of ['title', 'startHour', 'startMinute', 'endHour', 'endMinute']) {
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yield [key, this[key]];
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}
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}
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}
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for (let [key, value] of new Schedule('lunch', 12, 0, 13, 0)) console.log(key + ': ' + value);
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```
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Re: atago_IT さん
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1
問題のコードを引用
test
CHANGED
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@@ -1,3 +1,13 @@
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> ```javascript
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> return schedules = {
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> title: title,
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> startHour: startHour,
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> startMinute: startMinute,
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> endHour: endHour,
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> endMinute: endMinute
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> };
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> ```
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「オブジェクトのプロパティ」は**iterable**ではありません。
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- [反復処理プロトコル \- JavaScript \| MDN](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Iteration_protocols)
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