instance method numtok

# File activesupport/lib/active_support/json/backends/okjson.rb, line 230
    def numtok(s)
      m = /-?([1-9][0-9]+|[0-9])([.][0-9]+)?([eE][+-]?[0-9]+)?/.match(s)
      if m && m.begin(0) == 0
        if m[3] && !m[2]
          [:val, m[0], Integer(m[1])*(10**Integer(m[3][1..-1]))]
        elsif m[2]
          [:val, m[0], Float(m[0])]
        else
          [:val, m[0], Integer(m[0])]
        end
      else
        []
      end
    end