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  1. or download this
    lhp@nereida:~/Lperl/src/cookbook/ch16$ perl -wde 0
    main::(-e:1):   0
    ...
      DB<4> $var = 'x'
      DB<5> print "Found $var\n" if (first { $_ eq $var } qw{a e g h d r})
      DB<6>