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Recursive substitution

by JadeNB (Chaplain)
on Nov 10, 2009 at 04:10 UTC ( [id://806115]=perlquestion: print w/replies, xml ) Need Help??

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  1. or download this
    $_ = 'ab';
s/^(a{1,3})(?=b)/$1a/g; # => $_ = 'aab'
  2. or download this
    $_ = 'ab';
s/^(a{1,3})(?=b)/pos = 0, $1 . 'a'/eg; # still, $_ => 'aab'

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