[Solved] How to search for a duplicate in a given string using scriptlet? [closed]

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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>

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solved How to search for a duplicate in a given string using scriptlet? [closed]