From: Carlos <angus@...>
Date: 2006-11-14T19:32:53+09:00
Subject: Re: capitalize bug?

Jean-pierre Riviere wrote:
> Hi!
> 
> I'm a new member here, though I use and enjoy ruby for about three 
> years. There's a beginning to everyuthing, including thing not doing the 
> way you think they should, even in ruby!
> 
> So here's my problem:
> 
> @nom = wnom.gsub(/_+(.)/, '\1'.upcase)

The parameters to gsub are: 1. a regex, 2. the result of '\1'.upcase 
(that is, '\1').

> What this code should do is taking the string wnom, and removing every _ 
> and at the same time capitalizing the letter immediatly after.
> 
> for instance do_it_now would become doItNow. One way to translate ruby 
> usage into camel case.
> 
> but this code does in fact producte doitnow instead of doItNow.
> 
> Now, I am not blocked, because I have achieved my goal with this code:
> 
> nom = wnom.gsub(/_+(.)/) { |deb| deb[1, 1].upcase }

If you want to substitute the substring with the result of applying a 
function to it, your only choice is to use the block parameter to gsub, 
yes. (Did the previous sentence parse?) Another possibility is to use 
$1.upcase.

HTH
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