Added different examples

Author: PavloBezpalov

README.md

@@ -783,16 +783,15 @@ then in your views :
 then in your Coffee/JS :
 
 ```coffee
+# send params in form data
 $ ->
   $('#posts-datatable').dataTable
     ajax:
       url: $('#posts-datatable').data('source')
-      contentType: 'application/json'
       type: 'POST'
-      data: (d) ->
-        JSON.stringify d
     # ...others options, see [here](#5-wire-up-the-javascript)
 
+# send params as json data
 $ ->
   $('#users-datatable').dataTable
     ajax: