Untested: 
my @chunks = $string =~ /(?|(?:((?:[^\n]*\n){19}[^\n]*)\n)|((?s:.*)))/
+g;

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This does just as split, it loses every 20th newline. You can make it less complex is you want to keep the delimiter.

In reply to Re: Split a string at a given line number by JavaFan
in thread Split a string at a given line number by danj35

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