From: Robert Klemme <shortcutter@...>
Date: 2012-02-08T21:12:59+09:00
Subject: Re: regexpr with gsub

On Wed, Feb 8, 2012 at 10:32 AM, Vic Trento <dainova@yahoo.com> wrote:
> Hi,
> I'm trying to get code to replace first alpha char for Cap, and can't
> get how it works, in case#1 dot represent any char including space and
> it works fine, but when I tried to do first "a" it doesn't catch
> anything, I played with [a-z] and other syntax but still have this
> problem.
> Can anybody point my brain into right place, why it doesn't work?
>
> ruby 1.9.3p0 (2011-10-30) [i386-mingw32]
> irb(main):002:0> puts ss
>  sabaka ryba
> => nil
> irb(main):003:0> puts ss.gsub(/^./,"A")      # case #1
> Asabaka ryba
> irb(main):005:0> puts ss.gsub(/^a/,"A")      # case #2
>  sabaka ryba
> irb(main):005:0> puts ss.gsub(/^[a-z]/,/[A-Z]/)      # case #3
>  sabaka ryba

irb(main):002:0> "aaa aaa".gsub /\ba/, 'A'
=> "Aaa Aaa"

This won't work for the general case though.  You might rather want to
do something like

irb(main):003:0> "aaa aaa".gsub(/\w+/) {|m| m.capitalize}
=> "Aaa Aaa"

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
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