1-js/07-object-oriented-programming/10-class-inheritance#138
Merged
leviding merged 8 commits intojavascript-tutorial:zh-hansfrom Aug 13, 2018
Merged
1-js/07-object-oriented-programming/10-class-inheritance#138leviding merged 8 commits intojavascript-tutorial:zh-hansfrom
leviding merged 8 commits intojavascript-tutorial:zh-hansfrom
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Contributor
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@leviding 校对认领 |
Member
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@Starriers ok |
Starriers
reviewed
Aug 9, 2018
| Here's the code with `Rabbit` extending `Animal`. | ||
| 这里有一份代码，是 `Rabbit` 继承 `Animal`。 | ||
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| 不幸的是，`Rabbit` 无法被创建，是哪里出错了呢？请解决这个问题 |
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| The reason becomes obvious if we try to run it. An inheriting class constructor must call `super()`. Otherwise `"this"` won't be "defined". | ||
| 如果我们尝试运行它，就会发现明显的原因。派生类的构造函数必须调用 | ||
| `super()`。否则不会定义 `"this"`。 |
Contributor
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这是同一句啊 不用换行
this 不是一直有啊 还是直译吧
| constructor(name) { | ||
| *!* | ||
| super(); // need to call the parent constructor when inheriting | ||
| super(); // 需要在继承是调用父类的构造函数 |
| */!* | ||
| ``` | ||
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| But if we don't have `extends Object`, then `Rabbit.__proto__` is not set to `Object`. |
| @@ -4,9 +4,9 @@ importance: 5 | |||
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| # Class extends Object? | |||
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| *!* | ||
| rabbit.eat(); // Error calling super (because there's no [[HomeObject]]) | ||
| rabbit.eat(); // 调用报错（因为没有 [[HomeObject]]） |
| 每个方法都会在内部的 `[[HomeObject]]` 属性上标记它的对象。然后 `super` 利用它来解析父级原型。 | ||
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| `[[HomeObject]]` 是为类和纯对象中定义的方法定义的。但是对于对象，方法必须按照给定的方式定义：使用 `method()`，而不是 `"method: function()"`。 |
| __proto__: animal, | ||
| eat() { | ||
| // ...bounce around rabbit-style and call parent (animal) method | ||
| // 新建一个兔子并调用父类的方法 |
| __proto__: rabbit, | ||
| eat() { | ||
| // ...do something with long ears and call parent (rabbit) method | ||
| // 用长耳朵做一些事情，并调用父类（rabbit）的方法 |
| ``` | ||
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| 3. ...So `rabbit.eat` calls itself in the endless loop, because it can't ascend any further. | ||
| 3. 所以 `rabbit.eat` 不停地循环调用自己，因此它无法进一步地往原型链的更高层调用 |
Member
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@zhangfe 修改下吧 |
Member
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@zhangfe 麻烦尽快修改下哈 |
Member
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@zhangfe 请马上修改 |
Contributor
Author
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@leviding done，已经修改了 |
Member
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整体很不错，细节格式再注意下就更棒了 |
Contributor
Author
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@leviding 不好意思，我下次注意，哈哈；这个还用分享到掘金去嘛？ |
Contributor
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@zhangfe 不用 这个仓库是单独的 |
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翻译完成 #104