如何将两个过程合二为一? [英] How to combine two procs into one?

问题描述

只是想知道是否有一个语法快捷方式来获取两个过程并将它们连接起来，以便将一个的输出传递给另一个，相当于:

Just wondering if there's a syntax shortcut for taking two procs and joining them so that output of one is passed to the other, equivalent to:

a = ->(x) { x + 1 }
b = ->(x) { x * 10 }
c = ->(x) { b.( a.( x ) ) }

这在处理诸如 method(:abc).to_proc 和 :xyz.to_proc

推荐答案

更多的糖，在生产代码中并不真正推荐

class Proc
  def *(other)
    ->(*args) { self[*other[*args]] }
  end
end

a = ->(x){x+1}
b = ->(x){x*10}
c = b*a
c.call(1) #=> 20

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