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Thank you very much for your tips. With my irregual data I had to change my code( and data) and your tips helped alot.

In my check table (csv), I have 3 character codes(ICAO) and their equivalent 2 character codes(IATA) and descriptions. At first, IATA was at first column so I needed previous element of the array when the key was found. But after having an example of irregular ICAO code, which has 2 characters that matches its IATA code, the code didn't help since Perl stops after the first matching. And that IATA code is used three times in the table ( 1 ICAO, 2 IATA)

Then I changed IATA and ICAO columns' order and changed the code with your help and now it works. Though it may be clumsy, i think its pretty clear.

--$hash{'AirIATA'}= get_IATA($airlineLoc,$hash{'Airline'}) ; ------------------------------------------------------- sub get_IATA { my $file = shift; my $airline = shift; my @data; open(my $fh, '<', $file) or die "Can't read file '$file' [$!]\ +n"; while (my $line = <$fh>) { my @fields = split(/;/, $line); push @data, @fields; } close($fh); my @results= map { $data[$_] =~ m{ \A \Q$airline\E }xms ? $data[$ +_ + 1] : () } 1 .. $#data; if ($#results>1) { return $results[1]; } elsif ($#results>0) # Do I need a second check, like <2 ? { return $results[0]; } else { print "Airline $airline has no definition in $file fil +e\n"; exit; # Program should stop if there is no match } }

In reply to Re^4: Warning is right or not ? by Anonymous Monk
in thread Warning is right or not ? by Anonymous Monk

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