my %results = map { $_ => 1 if ( $low_watermark < $_ && $_ < $high_watermark ) } @all_numbers;

will get all of the matching numbers

Not if any of the numbers are duplicates because you are storing them in hash keys which will remove duplicates.

Why not just: 

my @results = grep $low_watermark < $_ && $_ < $high_watermark, @all_n
+umbers;

[download]

In reply to Re^2: Array, element inside limits by jwkrahn
in thread Array, element inside limits by natol44

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