yhara1_demystified.rb

def _(&b)$><<->(x){x ? (String===x ?x.upcase:
(Class===x ? x : x.class).name[$a?0:($a=5)]):
" "}[ begin b[];rescue Exception;$!;end ] end

_ {                 return                  } # LocalJumpError
_ {            method(:p).unbind            } #      UnboundMethod
_ {                eval "{ "                } #      SyntaxError
_ {           Thread.current.join           } #      Thread
_ {                   nil                   }
_ {                 select                  } #      ArgumentError
_ {                  ruby                   } #      NoMethodError
_ {               self.class                } #      Object
_ {          Thread.current.group           } #      ThreadGroup
_ {                nil.to_h                 } #      Hash
_ {          "\xFF".encode("big5")          } #      Encoding::InvalidByteSequenceError
_ {                  raise                  } #      RuntimeError
_ {                 [0][1]                  }
_ {           Regexp.compile "*"            } #      Regexp
_ {           RUBY_COPYRIGHT[32]            } #     Yukihiro Matsumoto
_ {                 binding                 } #      Binding
_ {            :s.class.name[1]             } #     Symbol
_ {                  warn                   }
_ {                [a: :b][0]               } #      Hash
_ {                 methods                 } #      Array
_ {                IO.class                 } #      Class
_ {               {}.fetch(0)               } #      KeyError
_ {                open " "                 } #      Errno::ENOENT
_ {               1000000.chr               } #      RangeError