Re: [FWP] Sort challenge

[Peter Scott <Peter@PSDT.com>]

At 02:45 PM 2/21/2001 +0100, Lou Hevly wrote:
>Greetings all:
>
>Given the following data:
>
>__DATA__
>ae|Evans|Anne
>le|Evans|Louise
>he|Evans|Helen
>je|Evans|
>pete||Peter
>xs|Sanchez|
>rwj||
>est||
>
>1) If there's a last name, the program should sort first by that and then 
>by the firstname (if there is one);
>2) If no last name, then sort by first name;
>3) If neither last nor first name, then sort by username

Fore!

perl -nalF'\|' -e '($u,$l,$f)=@F;$x=($f?($l?"$l, 
$f":$f):$l)||$u;$y=lc$x;$h{$y}=$x;push@x,$y;END{print$h{$_}for sort@x}'

>So the desired result is:
>
>est
>Evans
>Evans, Anne
>Evans, Helen
>Evans, Louise
>Peter
>rwj
>Sanchez


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