摘要：
Ordinaryclassesandmethodsworkwithspecifictypes: eitherprimitivesorclasstypes.Ifyouarewritingcodethatmightbeusedacrossmoretypes,thisrigiditycanbeoverconstraining.One way that object-oriented languages allow generalization is through polymorphism. You can write (for example) a method that takes a bas 阅读全文
posted @ 2014-04-07 21:58
wuhn
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