ruby 中是否有“管道"等价物?

问题描述

有时在编写 Ruby 时，我发现自己想要一个 pipe 方法，类似于 tap 但返回 result 使用 self 作为参数，像这样:

Occasionally when writing Ruby I find myself wanting a pipe method, similar to tap but returning the result of calling the block with self as a parameter, like this:

class Object
  def pipe(&block)
    block.call(self)
  end
end

some_operation.pipe { |x| some_other_operation(x) }

..但到目前为止我还没有找到它的名字，如果它存在的话.存在吗?

..but so far I haven't managed to find out what it's called, if it exists. Does it exist?

如果没有，我知道我可以通过猴子补丁对象来添加它，但是，你知道，这很糟糕.除非有一个绝妙的、保证永远不会冲突的(和描述性的和简短的)名称，否则我可以用它...

If it doesn't, I know I could monkey-patch object to add it but, y'know, that's bad. Unless there's a brilliant, guaranteed to never clash (and descriptive and short) name I could use for it...

推荐答案

核心中不存在这种抽象.我通常称它为 as，它简短且具有声明性:

This abstraction doesn't exist in the core. I usually call it as, it's short and declarative:

class Object
  def as
    yield(self)
  end
end

"3".to_i.as { |x| x*x } #=> 9

Raganwald 通常在他的帖子中提到这种抽象，他称之为 进入.

Raganwald usually mentions that abstraction in his posts, he calls it into.

所以，总结一下，一些名字:pipe、as、into、peg、通过.

So, summing it up, some names: pipe, as, into, peg, thru.

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