From: Sebastian Hungerecker <sepp2k@...>
Date: 2009-06-21T07:44:00+09:00
Subject: Re: replacing repetition of characters in string

Am Sonntag 21 Juni 2009 00:05:22 schrieb David Rio:
> INPUT
> ---------
> test. AA. I greatXXrr love it.
> audi tt uu yes.
> stop here, axmmen.
>
> OUTPUT
> ------------
> {3} test. *AA*. I great*XX**rr* love it.
> {2} audi tt uu yes.
> {1} stop here, ax*mm*en.

I'm assuming line 2 should be  {2} audi *tt* *uu* yes

DATA.each do |line|
  i = 0
  # For each match of "any character followed by the same character" do:
  marked = line.gsub(/(.)\1/) do |match|
    i += 1
    # return the match surrounded by asterisks from the block, which will
    # tell gsub to replace the match with that
    "*#{ match }*"
  end
  puts "{#{ i }} #{marked}"
end
__END__
test. AA. I greatXXrr love it.
audi tt uu yes.
stop here, axmmen.

Output:
{3} test. *AA*. I great*XX**rr* love it.
{2} audi *tt* *uu* yes.
{1} stop here, ax*mm*en.


HTH,
Sebastian