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You can also add methods and data to existing Ruby classes because classes are open.
还可以添加方法和数据到已有的类中,因为类是开放式的。
youdao
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Firstly, never add methods that might be useful in the future.
首先,不要加入将来才可能用到的方法。
youdao
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Firstly, never add methods that might be useful in the future.
首先,不要加入将来才可能用到的方法。
youdao