zh-cn for Scala Tour:extractor-objects.md #1183
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realwunan
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liufengyun
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_zh-cn/tour/extractor-objects.md
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| 这里 `apply` 方法用 `name` 创建一个 `CustomerID` 字符串. 而 `unapply` 方法正好相反, 它返回 `name` . 当我们调用 `CustomerID("Sukyoung")` , 其实是调用了 `CustomerID.apply("Sukyoung")` 的简化语法. 当我们调用 `case CustomerID(name) => println(name)`, 就是在调用提取器方法. | ||
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| 因为在定义一个值的时候可以使用一个模式来引入一个新的变量, 提取器可以用来初始化这个变量, 使用 unapply 方法来生成值. |
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It's much better, thanks a lot.
_zh-cn/tour/extractor-objects.md
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| * 如果只是用来测试, 返回一个 `Boolean` 类型的值. 例如 `case even()`. | ||
| * 如果只是用来提取单个 T 类型的值, 返回 `Option[T]`. | ||
| * 如果你想要提取多个值, 类型分别为 `T1,...,Tn`, 把它们放在一个可选的元祖中 `Option[(T1,...,Tn)]`. |
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Thanks for pointing it out.
_zh-cn/tour/extractor-objects.md
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| `unapply` 方法的返回值应当符合下面的某一条: | ||
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| * 如果只是用来测试, 返回一个 `Boolean` 类型的值. 例如 `case even()`. |
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Just change the translation to use Chinese punctuation. |
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LGTM, thanks a lot for the contribution @realwunan 🎉 |
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Simplified Chinese version of Scala Tour: Extractor Objects