How do I remove all undefs from array?

Question

While reading from a configuration file in Perl there might be cases when a line is invalid and it does not need to get added to my array of valid lines. Since I'm using a for loop here, even the invalid lines create an undef entry. How can I remove all them afterwards?

Thanks!

Oliy

if you're creating the config file use a module like Config::Simple. If you're reading the content of a pre-existing config file into an array why are you pushing invalid entries into your array instead of skipping them? – Bessel

Answer 1

@array = grep defined, @array;

Doris

simple and great solution – Inutile

It's working for me. Thank you for this simple solution. – Babbler

Interesting, I am seeing defined(@array) is deprecated at /path/to/script.pl line X. using perl 5.10.1 (yes I realize the year is 2021, but I gotta work with what I got) – Narbada

Should have added this immediately, but @array = grep {defined} @array; works for my particular flavor of Perl. – Narbada