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How to search for a duplicate in a given string using scriptlet?

How can I search for a duplicate in a given string using a scriptlet? 

ScripletInput= a,b,c,a

Here the letter 'a' is repeating. If it is repeating more than once, then it should exit, else it can go ahead.

Solution

  • Please see Remove occurrences of duplicate words in a string

    The code below will remove duplicates in a string.

    <script type="text/javascript">
    str=prompt("Enter String::","");
    arr=new Array();
    arr=str.split(",");
    unique=new Array();
    for(i=0;i<arr.length;i++)
    {
        if((i==arr.indexOf(arr[i]))||(arr.indexOf(arr[i])==arr.lastIndexOf(arr[i])))
            unique.push(arr[i]);   
    }
    unique.join(",");
    alert(unique);
</script>