I bought the Chinese version of Programming Ruby

最新推荐文章于 2017-08-28 14:35:14 发布

最新推荐文章于 2017-08-28 14:35:14 发布 · 113 阅读

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本文讲述了作者在阅读《Programming Ruby》一书过程中对于Closure概念的理解历程。Closure作为一个新术语，在Ruby中有着重要的作用。通过对比英文版与中文版书籍的内容，作者最终掌握了Closure的概念，并给出了一个具体的Ruby代码示例。

Yesterday morning,When I read the 4.2.3 chapter of the ruby book named <Programming Ruby>,I couldn't understand the meaning of this chapter.I have been reading this book for 2 weeks,but I only read fifty pages.I thought of the speed was too slowly and it was waste of time, then I bought a Chinese version of this book.

After I bought the Chinese book I know the meaning of 'Closure'.'Closure' is a new jargon which I had heard of a year ago.Although I know it,I didn't know what it means.The following is a example which is showed in <Programming Ruby>,but I don't know where I can use this new feature.

ruby 代码

def n_times(thing) return lambda {|n| thing * n } end p1 = n_times(23) p1.call(3) ! 69 p1.call(4) ! 92 p2 = n_times("Hello ") p2.call(3) ! "Hello Hello Hello "

This blog might be finished yesterday afternoon,but it was delayed by other thing.I wrote this blog as soon as I came in my office on this morning.