From: bradphelan <bradphelan@...>
Date: 2006-12-21T05:30:05+09:00
Subject: Re: ruby gotchas



On 20 Dec, 18:01, dbl...@wobblini.net wrote:
> Hi --
>
>
>
> On Thu, 21 Dec 2006, Brad Phelan wrote:
> > Mark Guzman wrote:
> >> I've written up some ruby gotchas that have come up while using ruby.
> >> I'm wondering if there are any other gotchas that I should be aware of.
> >> The list is available at:
> >>http://hasno.info/2006/12/14/ruby-gotchas-and-caveats
>
> >> I was considering adding &&= to the list as it's functionality seemed a
> >> bit odd to me at first.
> >>   --mark
>
> > The follow gets on my nerves a bit
>
> > class A
> >    def foo
> >        yield "foo"
> >    end
> > end
>
> > a = A.new
> > a.foo do |a|
> >    puts a
> > end
>
> > a.foo do |a|
> >    puts a
> > end
>
> > ---
>
> > foo
> > test.rb:12: undefined method `foo' for "foo":String (NoMethodError)
>
> > ---
>
> > Arguments to blocks are not scoped locally if the
> > name already exists in the outer scope. I think this
> > might be changing in Ruby 2.0???I think so.  I believe that I and Guy Decoux are the only people who
> will miss it :-)
>
> David

For what reasons will you miss it? I am sure Matz had it that way for a
reason and I don't
claim to be enlightened enough to say it is wrong. Tt just doesn't fit
with the way I would
expect it to work. Locally scoped seems more natural.


>
> --
> Q. What's a good holiday present for the serious Rails developer?
> A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
>     aka The Ruby book for Rails developers!
> Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
> A. Ruby Power and Light, LLC (http://www.rubypal.com)