Re^2: Beginner in perl : Use of uninitialized value

Just another tip: there is no need to read all of STDIN into an array; you can iterate over each line as it comes in.
foreach my $line (<STDIN>) {
    ...
}
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The problem with that is that the foreach loop will read all lines into a list in memory first.

You need a while loop to iterate over one line at a time:

while ( my $line = <STDIN> ) {
    ...
}
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Re^3: Beginner in perl : Use of uninitialized value by jimpudar (Pilgrim) on Dec 28, 2018 at 20:20 UTC
Quite right, that's what I get for posting without testing my code :). I edited my comment to correct this. πάντων χρημάτων μέτρον έστιν άνθρωπος.	[reply]
Re^4: Beginner in perl : Use of uninitialized value by Perl_Programmer1992 (Sexton) on Dec 29, 2018 at 07:42 UTC
Thank you @jwkrahn and @jimpudar , it's been such a great learning so far , I will definitely keep these things in mind when coding next time.	[reply]