If you want to filter elements out of an array, use grep (see perlfunc). For example, to keep only strings which have a length of at least 1 character, you could use:
my @strings = split "\t", $line;
my @keep = grep { length($_) >= 0 } @strings;
This can be made more concise:
my @keep = grep { length($_) } split "\t", $line;
Or even:
my @keep = grep length, split "\t", $line;
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'
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