Why does this work?: perl -e '$_ = "The brown fox jumps over the lazy dog ABC god yzal eht revo spmuj xof nworb ehT";while(/(.{10,41})(?{$cap = $^N;$rev = r($cap);})(...)(??{$rev})/ig){print("$1\n")}sub r {return(join("",reverse(split("",$_[0]))))}' But not this?: perl -e '$_ = "The brown fox jumps over the lazy dog ABC god yzal eht revo spmuj xof nworb ehT";$f=10;$e=41;while(/(.{$f,$e})(?{$cap = $^N;$rev = r($cap);})(...)(??{$rev})/ig){print("$1\n")}sub r {return(join("",reverse(split("",$_[0]))))}' Please forgive me if the answer is already here. I'm feeling pretty scatter-brained today. Thanks, Rob

In reply to Re: Spurious re 'eval'; warning ? by Anonymous Monk
in thread Spurious re 'eval'; warning ? by bsb

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