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  1. or download this
    my @third_fragments = grep -v ($rsite3), $second_fragments[$i];
    
  2. or download this
    perldoc -f grep
    
  3. or download this
    $ perl -e 'my @number_larger_than_5 = grep {$_ > 5} 1..10; print " @nu
    +mber_larger_than_5";'
     6 7 8 9 10