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How do I wrap long lines at a fixed width, ignoring word boundaries?

( #51419=categorized question: print w/ replies, xml ) Need Help??
Contributed by Zombie Haggis on Jan 12, 2001 at 22:22 UTC
Q&A  > data formatting


Description:

I have a very long string containing no newlines. I want to insert a "\n" every 128 characters.

Text::Wrap doesn't do what I want as it breaks lines at whole words, resulting in lines that can be less than 128 characters.

Answer: How do I wrap long lines at a fixed width, ignoring word boundaries?
contributed by davorg

sub fixedwidth_linebreaks { my( $str, $width ) = @_; my $newstr; while ( $str ) { $newstr .= substr( $str, 0, $width, '' )."\n"; } $newstr } $str = fixedwidth_linebreaks( $str, 128 );

Note that this adds a newline onto the last segment, even if it's shorter than the specified width.

Answer: How do I wrap long lines at a fixed width, ignoring word boundaries?
contributed by chipmunk

You could do this with a substitution:

s/(.{128})/$1\n/g;

This does not add a newline to the final segment if it's shorter than 128 characters.

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