The general technique here is @parts = $string =~ /(.{1,44}(?:,|$))/g; You get chunks of up to 45 characters, ending either with a comma or at the end of the string. If there's a possibility of newlines in your data, just add the /s modifier to the regex.
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: Split on field length by japhy
in thread Split on field length by Anonymous Monk

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