It sounds like you need something like this: 

my %file_lookup;
for my $file ( @update ) {
    push @{ $file_lookup{ substr( $file, 0, 4 ) } }, $file;
    }

for my $dir ( @prod ) {
    next unless exists $file_lookup{ $dir };
    for my $file ( @{ $file_lookup{ $dir } } ) {
        copy( $file, "$dir/$file" ) or warn "Cannot copy '$file' to '$
+dir/$file' $!"
        }
    }

[download]

In reply to Re: Compare and copy array values by jwkrahn
in thread Compare and copy array values by tgolf4fun

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