duplicate data check from the array

[dasrasmikant]

hello,
I have the below code

<script language="javascript">
    var myArray =new Array("tulu","dudu","tulu","milu")
    for(i=0;i<myArray.length;i++)
        {
            alert(myArray[i])
 
        }
</script> 

In the above code the alert message prints "tulu" twice. But I need to avoid duplicacy. Can anybody will help me to fix it.

Thanks in advance

[hsriat]

Try this...

function arrayUnique(array) {
    var p, i, j;
    for(i = array.length; i;){
        for(p = --i; p > 0;){
            if(array[i] === array[--p]){
                for(j = p; --p && array[i] === array[p];);
                i -= array.splice(p + 1, j - p).length;
            }
        }
    }
    return true;
}

Harpreet

[dasrasmikant]

thank you very much hsriat. Its working.
could you explain me the above code..

[hsriat]

function arrayUnique(array) {
    var p, i, j;
 
    /*for each ith index in array
    from the last index to the 0th*/
    for(i = array.length; i;){
 
        /*for each pth,
        moving from the ith to the 0th*/
        for(p = --i; p > 0;){
 
            /*if ith is same as pth*/
            if(array[i] === array[--p]){
 
                /*going down the index,
                until same value exists*/
                for(j = p; --p && array[i] === array[p];);
 
                /*remove the matching index/ices 
                update the value of i according
                to the latest length of the array*/
                i -= array.splice(p + 1, j - p).length;
            }
        }
    }
    return true;
}

Regards