$ perl -le'
my $n = 4;
my $m = 1;
$_ = "p8888er9999l";
print;
s/((.)\2*)/ $n == length $1 ? $2 x $m : $1 /eg;
print;
'
p8888er9999l
p8er9l

$ perl -le'
my $n = 1;
my $m = 3;
$_ = "monks";
print;
s/((.)\2*)/ $n == length $1 ? $2 x $m : $1 /eg;
print;
'
monks
mmmooonnnkkksss

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In reply to Re: repeated characters in regular expressions by jwkrahn
in thread repeated characters in regular expressions by AmnonM

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