From: dblack@...
Date: 2006-12-21T02:01:51+09:00
Subject: Re: ruby gotchas

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

-- 
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