From: Robert Klemme <bob.news@...>
Date: 2003-07-16T18:26:04+09:00
Subject: Keyword "with"


Hi all,

did anybody think of this?

module Kernel
  def with(obj, &blk)
    obj.instance_eval &blk
  end
end

It's so simple that I barely dare to propose it.  Of course, one could use
instance_eval directly, but the keyword is IMHO a bit more intuitive and
it is known from other programming languages. (Pascal, which else?)

Now you can do

anAwfulLongIdentifierThatYouWontLiktToTypeOften = "foo"

with anAwfulLongIdentifierThatYouWontLiktToTypeOften do
  puts length
  concat "bar"
  puts length
  puts self
end

What do others think?  Is this worthwile to be included in the Ruby std
lib?

Regards

    robert


Pascal:
http://www.cs.qub.ac.uk/~S.Fitzpatrick/Teaching/Pascal/EBNF.html#with-statement