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#2
为Jay沉沦2012-04-12 20:59
Duck typing
也许不翻译是最容易理解的了 definition: duck typing is a humorous way of describing the type non-checking system. initially coined by Dave Thomas in the Ruby community, its premise is that (referring to a value) "if it walks like a duck, and talks like a duck, then it is a duck." Even though Boo is a statically typed language, Duck Typing is a way to fake being a dynamic language. Duck typing allows variables to be recognized at runtime, instead of compile time. Though this can add a sense of simplicity, it does remove a large security barrier. e.g. d as duck d = 5 // 现在d是一个整型 print d d += 100 // 能够做任何整型允许的操作 d = "hello" // 现在d变成了字符串类型了 print d d = d.ToUpper() // 可以执行任何字符串操作了 print d 希望对你有用  |
我是学C#的，老师突然问道关于Python的一片外文中的duck type结果半天没有答上来。忘大神不吝赐教