scala的foreach和for

一句印象深入的话,Alan Kay(Smalltalk发明者)说得一句话:“I’m not against types, but I don't know of any typesystems that aren't a complete pain, so I still like dynamic typing”。并非静态类型很差,只是静态类型的实现太让他痛苦了,因此他只好喜欢动态类型(语言)。但
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