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(co-,contra-,in-)variance in Scala, what is [+-A]
時間 2021-01-02
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variance
scala
generics
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Scala
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本文主要總結Scala中關於generic variance(泛型變化, 我也不知道該怎麼翻譯,以下稱 GV),(co-,contra-,in)variance in Scala 的相關知識,什麼是 generic variance 呢?我的感覺是一種泛型類型的類型系統,應該和 type system 比較相關,(PL專家就不要嘲笑我了)。比如: List<Integer>是 List<Objec
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(co-,contra-,in-)variance in Scala, what is [+-A]
2.
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