2009/10/30 Jim Gibson <jimsgib...@gmail.com>: > Approach 1. is called a "stable sort". As you can see, Perl's sort gives you > a stable sort, as the last two lines are in the order they appear in the > original file. The Unix sort is not stable, so the lines with equal keys get > reversed in the output. Whether or not you consider this a "bug" depends > upon your application. You can generate a stable sort with the -s option to > Unix sort (may depend upon your version).
Note also that unix sort(1) provides this behaviour through the -s switch. So you have already emulated "sort -s" through perl! Philip -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
