Is there a `pipe` equivalent in ruby?

Question

Occasionally when writing Ruby I find myself wanting a pipe method, similar to tap but returning the result of calling the block with

Answer 1

Here's the the technique I use to chain objects. It's pretty much exactly as above except I don't reopen the Object class. Instead, I create a Module which I will use to extend whatever object instance I'm working with. See below:

module Chainable
  def as
    (yield self.dup).extend(Chainable)
  end
end

I've defined this method to prohibit mutative methods from altering the original object. Below is a trivial example of using this module:

[3] pry(main)> m = 'hi'
=> "hi"
[4] pry(main)> m.extend(Chainable).as { |m| m << '!' }.as { |m| m+'?'}
=> "hi!?"
[5] pry(main)> m
=> "hi"

If anybody sees anything wrong with this code, please let me know! Hope this helps.