A hash-of-hashes might help ( perldsc):
use warnings;
use strict;
my %results;
my $type;
while (<DATA>) {
next if m{^/};
next unless /\S/;
if (/^TYPE\s(\S+)/) {
$type = $1;
$results{$type}{CAUSE } = 'UNDEF';
$results{$type}{AFFECT} = 'UNDEF';
}
if (/^(CAUSE|AFFECT)\s(\S+)/) {
$results{$type}{$1} = $2;
}
}
for (sort keys %results) {
print "$_:$results{$_}{CAUSE},$results{$_}{AFFECT}\n";
}
__DATA__
// HEADER TAG
// VERSION TAG
TYPE VALUE1 EQUALS MAIN
I am useless text
CAUSE FAIL
AFFECT ERROR
ENDTYPE
TYPE VALUE2 EQUALS MAIN
I am useful test
ENDTYPE
TYPE VALUE3 EQUALS MAIN
CAUSE DEGRADED
ENDTYPE
TYPE VALUE4 EQUALS MAIN
AFFECT WARNING
ENDTYPE
prints:
VALUE1:FAIL,ERROR
VALUE2:UNDEF,UNDEF
VALUE3:DEGRADED,UNDEF
VALUE4:UNDEF,WARNING
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