How to implement .eq method in jQuery?

If we want make selection with jQuery, we can chain the .eq() method and pass the index of the selection. Below example we will select the cricket team with 8 key players of two teams.

Example:

<html>
<head>
    <title>.eq() method</title>
    <script src="//code.jquery.com/jquery-1.10.2.js"></script>
    <script type="text/javascript">
        (function ($) {
           $(document).ready(function () {
               $("ol#indian> li").eq(8).css("border-bottom", "1px solid blue");
               $("ol#pakistan> li").eq(8).css("border-bottom", "1px solid green");
            });
       })(jQuery);
    </script>
</head>
<body>
    <h2>Team India</h2>
    <ol id="indian">
        <li>MS Dhoni (captainand wicketkeeper)</li>
        <li>Virat Kohli</li>
        <li>RavichandranAshwin</li>
        <li>Shikhar Dhawan</li>
        <li>Ravindra Jadeja</li>
        <li>Harbhajan Singh</li>
        <li>Rohit Sharma</li>
        <li>Yuvraj Singh</li>
        <li>Ajinkya Rahane</li>
        <li>Suresh Raina</li>
        <li>Mohammed Shami</li>
        <li>Pawan Negi</li>
        <li>Jasprit Bumrah</li>
        <li>Ashish Nehra</li>
        <li>Hardik Pandya</li>
    </ol>
 
    <h2>Team Pakistan</h2>
    <ol id="pakistan">
        <li>Shahid Afridi(captain)</li>
        <li>Mohammed Hafeez</li>
        <li>Shoaib Malik</li>
        <li>Umar Akmal</li>
        <li>Wahab Riaz</li>
        <li>Mohammad Aamir</li>
        <li>Ahmed Shehzad</li>
        <li>Sarfraz Ahmed</li>
        <li>Mohammad Irfan</li>
        <li>Babr Azam</li>
        <li>Iftikhar Ahmed</li>
        <li>Imad Wasim</li>
        <li>Anwar Ali</li>
        <li>Mohammad Nawaz</li>
        <li>Mohammad Sami</li>
    </ol>
</body>
</html> 

Output:

to implement .eq method in jQuery