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  1. or download this
    % perl -MO=Deparse,-p -ce '($x) ? $z  = "true" : $z  = "false";'
    (($x ? ($z = "true") : $z) = "false");
    -e syntax OK
    %
    
  2. or download this
    % perl -wle '$x = 1; $x ? ($z = "true") : ($z = "false"); print $z'
    true
    ...
    % perl -wle '$x = 1; $z = $x ? "true" : "false"; print $z'
    true
    %