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  1. or download this
     DB<100> map {+2,$_} 1..3   # +2 is not a hash key
 => (2, 1, 2, 2, 2, 3)
...
  DB<104> map {+2 => $_}, 1..3 # +2 is not a hash key even with fat co
+mma
           ;;
syntax error at (eval 29)[multi_perl5db.pl:644] line 2, near "},"
  2. or download this
      DB<105> map +{+2 => $_}, 1..3 # +2 IS A HASH KEY
 => ({ 2 => 1 }, { 2 => 2 }, { 2 => 3 })

  DB<106> map +{+2 , $_}, 1..3  # +2 IS A HASH KEY even without =>
 => ({ 2 => 1 }, { 2 => 2 }, { 2 => 3 })