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  1. or download this
    14:20 >perl -MData::Dump -wE "dd map { $_ * 2 } 1 .. 5;"
(2, 4, 6, 8, 10)

17:20 >
  2. or download this
    17:20 >perl -MData::Dump -wE "dd grep { $_ % 2 == 0 } 1 .. 10;"
(2, 4, 6, 8, 10)

17:26 >