cursed5.rb

# Cursed ways to return 5 without using 0123456789+-*/

[[],[],[],[],[]].size  # => 5

Array(?;..??).size  # => 5

module Solution3
  def self.method_missing(name)
    return name.size if name =~ %r{^.....$}  # => 0
    super
  end                                        # => :method_missing
end                                          # => :method_missing
Solution3.honk!                              # => 5

proc{def a;raise ??;rescue;yield;end;begin;eval"proc#{eval"'aaaaa'.gsub(%r{.},\"{\\\\#{?}.to_i}}\").chars.sort{|c|c==?}???.to_i.succ: ??.to_i}.join"}[]";rescue=>e;end;d=?d.to_i;d=d.succ while e=e.cause;d}[]  # => 5