encode

# File activesupport/lib/active_support/json/encoding.rb, line 37
        def encode(value)
          unless options.empty?
            value = value.as_json(options.dup.freeze)
          end
          json = stringify(jsonify(value))

          # Rails does more escaping than the JSON gem natively does (we
          # escape \u2028 and \u2029 and optionally >, <, & to work around
          # certain browser problems).
          if @options.fetch(:escape_html_entities, Encoding.escape_html_entities_in_json)
            json.gsub!(">", '\u003e')
            json.gsub!("<", '\u003c')
            json.gsub!("&", '\u0026')
          end
          json.gsub!("\u2028", '\u2028')
          json.gsub!("\u2029", '\u2029')
          json
        end