Using jquery-ui-rails datepicker in an Ruby on Rails website. datepicker method not defined -

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i got problem writing website ruby on rails.

bundle show * jquery-ui-rails (4.0.1)

in app/assets/javascripts/application.js

//= require jquery.ui.datepicker

in app/assets/stylesheets/application.css

*= require jquery.ui.datepicker

in app/views/layouts/application.html.erb

<%= stylesheet_link_tag    "application", :media => "all" %> <%= javascript_include_tag "application" %>

and in somepage.html.erb, got

<script type="text/javascript"> $(function(){     $("#startdate").datepicker();     $("#enddate").datepicker(); }); </script>

when running it, chrome says 

uncaught typeerror: object [object object] has no method 'datepicker'

i suppose resource not being referred cause because problem fixed adding follows app/views/layouts/application.html.erb

<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.1/themes/base/jquery-ui.css" /> <script src="http://code.jquery.com/jquery-1.9.1.js"></script> <script src="http://code.jquery.com/ui/1.10.1/jquery-ui.js"></script> <link rel="stylesheet" href="/resources/demos/style.css" />

these found @ http://jqueryui.com/datepicker/. saw demos having working datepickers without these codes. not understand why not working in mine. got suggestions? add other mentioned above?

it because of either of following:

1) including multiple javascript files in application.html.erb leading havoc when put altogether.

2) using other javascript file using $ jquery using. having 2 same symbols possible cause of getting no method 'datepicker' jquery.

the alternative replace occurences of $ jquery

or

just wrap jquery code insode block following:

jquery(function($){     //all jquery code uses $ should here. });

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