HTML-JS-CSS/unique_elements_arr.html at main · madanrajsagar/HTML-JS-CSS · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
     <script>
             var arr =["abc","kumar","xyz","pqr","sanjay","abc","pqr","mno","karan","subhas","sanjay","kumar"];

        //     document.write(" old Array :- "+ arr  +"<br>");
        //     var unique = [];
        //     for(let i = 0 ;i<arr.length; i++)
        //     {
        //       if(unique.indexOf(arr[i]) == -1)
        //       {
        //          unique.push(arr[i]);
        //       }

        //     }

        //     document.write(" new Array :- "+ unique);
        //  -->

        document.write(" duplicate Array :- "+ arr  +"<br><br>");
        for (let i=0 ; i< arr.length;i++)
        {
            for (let j= i+1; j<arr.length;j++)
            {
                if(arr[i]==arr[j])
                {
                    arr.splice(j,1);// we used splice( indexOnWhichOperation_perform   , no. of delete ele , elements to be enserted ,elements to be enserted,.,.,.,.  ) method here
                }
            }
        }
        document.write(" unique Array :- "+ arr  +"<br>");

</Script>

</body>
</html>