> -----Original Message-----
> From: Paul Kraus [mailto:[EMAIL PROTECTED]]
> Sent: Friday, December 13, 2002 10:19 AM
> To: 'Perl'
> Subject: Conditional Array lookup
>
>
> Is there a way to do an if or unless against an entire array.
>
> @exclude = ....
>
> #compare $soomevaraible to every element of @exclude.
> unless ($somevariable eq @exclude){
> ...
> }
The FAQ addresses this:
perldoc -q 'How can I tell whether a list or array contains a certain
element?'
>From your example, it sounds like @exclude is a list of things you want to
test against repeatedly. If so, turn @exclude into a hash:
%exclude = map { $_=>1 } @exclude;
Now you can test quickly:
unless (exists $exclude{$somevar}) {
print "$somevar is OK\n";
}
If you only need to check once, grep() is ok:
unless (grep { $_ eq $somevar } @exclude) {
print "$somevar is OK\n";
}
But don't do that repeatedly; use the hash instead.
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