Hi,
This is also non destructive, and uses a regexp: 
( $_ = $genome1 ) =~ s/(.{60})/print $1."\n"/eg;

[download]
Note the print statement in the regex using the e flag.

I don't know which is the most performant, but I do think that substr is more performant than a plain regex.
But regexes are more fun :-)
---------------------------
Dr. Mark Ceulemans
Senior Consultant
IT Masters, Belgium

In reply to Re: trivial wrapping by mce
in thread trivial wrapping by Anonymous Monk

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