I have the following string, where certain characters are repeated. I want to retain the first character and replace the immediately repeating characters with "*". But the below code works for the first occurrence of a particular character and not again if the same characters repeat at a latter point. 
my $str = "Foooboooobaaar";

while($str =~ /(\w)(\1+)/gi)
{
print "\nInside while concat_str -- $1 ---- $2 ---> $1.$2";
$str_concat = $1.$2;
$str_rep_concat = $1.'*';
$str=~ s/$str_concat/$str_rep_concat/gi;
}
print "\n$str";

[download]
The above code finds a repeated character only once i.e. the "o" after "F". If it is repeated again it is being ignored in this case the "o"s after b. How to find the all the repeated characters and have them substituted. Thanks

In reply to Replace repeated characters with * by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.