When I study a syntax, I try to use it for any odd task that turns up. We have a contest for a club of sorts where the winner gets a prize of value $25 or so, but the idea is to foster participation. Hence, we don't want perpetual winners or the winner to be the person who sits at his computer all day, so we're choosing a random correct answer as opposed to the first.

Where I'm stuck now is making a composite of the those who answer correctly less those who have already won. I looked for examples in the books I have and couldn't find one. If I were to proceed in the manner of the syntaxes I've studied before, I would loop through indices, making exhaustive comparisons. What is the perl way to remove a sublist from another list

$ perl rand1.pl
7246281254938614119473194136957146644855362901505395617562308444592359
+441659779924940736387588266118823158415004985978328481067994672839164
+223678436588869
2 
$ cat rand1.pl
#!/usr/bin/perl -w
use strict;
use feature ':5.10';
use Crypt::Random qw( makerandom ); 

my $r = makerandom ( Size => 512, Strength => 1 ); 
print "$r\n";

srand($r);
my @winners=("ruth","sheila");

my @correct=("ruth","martin","dee","zack");

my @composite = @correct - @winners;

print "@composite \n";
$

[download]

Thanks in advance,

In reply to removing a sublist by Aldebaran

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