From: Robert Klemme <shortcutter@...>
Date: 2013-02-11T19:39:28+09:00
Subject: Re: Ruby Equivalent to VB's "With"?

On Mon, Feb 11, 2013 at 10:04 AM, Joel Pearson <lists@ruby-forum.com> wrote:
> Nice one Henry. As usual Ruby has more than one way to do everything :)

IMHO #tap is only called for in these situations

 - The value to be tapped is the result of evaluating an expression
(and not already stored in a variable) AND
 - It should be used as the result of the larger expression.

Typical example:

module Enumerable
  def group_by
    {}.tap do |groups|
      each do |e|
        (groups[yield(e)] ||= []) << e
      end
    end
  end
end

In all other cases doing a simple assignment like

mo = my_object
mo = my.complicated.expression

is probably easier, cleaner and faster.

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/