From: Michael Fellinger <m.fellinger@...>
Date: 2007-09-04T16:47:07+09:00
Subject: Re: with

On 9/4/07, Nobuyoshi Nakada <nobu@ruby-lang.org> wrote:> Hi,>> At Tue, 4 Sep 2007 00:15:32 +0900,> Matthias W辰chter wrote in [ruby-talk:267357]:> > Is there something like "with" already available? Let me give the> > short implementation first so the gurus know right away what I am after:> >> > module Kernel> >   def with> >     yield self> >   end> > end>> "tap" in 1.9 is same.
They have different effects, while 'tap' will return self and throwaway results of the block, 'with' returns the result of the block.
[manveru@pi ~]$ RUBYOPT= irb19class Object  def with    yield(self)  endend# nil1.tap{|e| e + 1} + 2# 31.with{|e| e + 1} + 2# 4
^ manveru