From: Francoys <francois.pr@...>
Date: 2008-11-29T00:31:38+09:00
Subject: [ruby-core:20152] Re: [Bug #797] bug or feature: local method ?

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Diogo Lisboa wrote:
> On Wed, Nov 26, 2008 at 4:32 PM, Francoys <francois.pr@videotron.ca> wrote:
>   
>> declaring variables inside a method that are accessibles to all the
>> nested methods.
>>     
>
> This isn't possible though.
>
> def foo
>   bar = 10
>   def gazonk
>     p bar
>   end
> end
>
>   
>>> gazonk # => undefined local variable or method `gazonk'
>>> foo  # => nil
>>> gazonk # => undefined local variable or method `bar'
>>>       
>
>
> This doesn't work because the chained method is in a whole new scope
> which doesn't know anything about the outer method's local variables.
>
> But, however odd this functionality is, I think it would be useful for
> the enclosing method to inherit the outer scope. You'd get something
> like named closures, and calling `gazonk' after `foo' would be able to
> print 10.
>
> However, this wouldn't be consistent, meaning, it should have to work
> if you declared a local variable in a class definition and all the
> methods would be aware of that; at this point, things get ugly.
>
> I think the idea of 'named closure' could be interesting (I don't know
> what consequences this would have, but sounds like a feature more than
> a bug). It beats returning lambdas in an array.
>
> Would you, enlightened ones, share your opinions on this? On the idea
> of the local methods being a bug or feature, I don't think they count
> much as a feature the way they currently are.
>
>
> Diogo
>
>
>   
Try this one:

def foo
  @bar = 10
  def gazonk
    print @bar
  end
  gazonk
end

foo


Everything is an object in Ruby ...

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Diogo Lisboa wrote:
<blockquote
 cite="mida07a01900811271702p2b80e3earcb846965037bea9f@mail.gmail.com"
 type="cite">
  <pre wrap="">On Wed, Nov 26, 2008 at 4:32 PM, Francoys <a class="moz-txt-link-rfc2396E" href="mailto:francois.pr@videotron.ca">&lt;francois.pr@videotron.ca&gt;</a> wrote:
  </pre>
  <blockquote type="cite">
    <pre wrap="">declaring variables inside a method that are accessibles to all the
nested methods.
    </pre>
  </blockquote>
  <pre wrap=""><!---->
This isn't possible though.

def foo
  bar = 10
  def gazonk
    p bar
  end
end

  </pre>
  <blockquote type="cite">
    <blockquote type="cite">
      <pre wrap="">gazonk # =&gt; undefined local variable or method `gazonk'
foo  # =&gt; nil
gazonk # =&gt; undefined local variable or method `bar'
      </pre>
    </blockquote>
  </blockquote>
  <pre wrap=""><!---->

This doesn't work because the chained method is in a whole new scope
which doesn't know anything about the outer method's local variables.

But, however odd this functionality is, I think it would be useful for
the enclosing method to inherit the outer scope. You'd get something
like named closures, and calling `gazonk' after `foo' would be able to
print 10.

However, this wouldn't be consistent, meaning, it should have to work
if you declared a local variable in a class definition and all the
methods would be aware of that; at this point, things get ugly.

I think the idea of 'named closure' could be interesting (I don't know
what consequences this would have, but sounds like a feature more than
a bug). It beats returning lambdas in an array.

Would you, enlightened ones, share your opinions on this? On the idea
of the local methods being a bug or feature, I don't think they count
much as a feature the way they currently are.


Diogo


  </pre>
</blockquote>
Try this one:<br>
<br>
def foo<br>
�� @bar = 10<br>
�� def gazonk<br>
������ print @bar<br>
�� end<br>
�� gazonk<br>
end<br>
<br>
foo<br>
<br>
<br>
Everything is an object in Ruby ...<br>
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