Last number standing problem: extract number at specified position in array

[thesinnerishere]

this is regarding the last number standing problem.
it requires the number in an array to be extracted at a specified position .
then the array needs to traverse through the right position of the extracted number until there's the last number in the array. that number is the answer.
for eg.
if the specified position is 2
then in the array 1,2,3,4,5

it should go this way
1,3,4,5
1,3,5
3,5
3 ---.the answer

[acoder]

What have you tried so far? Please post your code.

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[hsriat]

<script type="text/javascript">
 
//inputs
var position = 2;
var arr = new Array (1,2,3,4,5);
 
//function
var offset = 0;
while (arr[1]) {
    var p = position - offset - 1;
    while (!arr[p])
    p -= arr.length;
    while (arr[p]) {
        offset = arr.length - p - 1;
        arr.splice(p, 1);
        //document.write(arr + '<br>' );
        p += position - 1;
    }
}
document.write ('<br>Answer = ' + arr[0]);
</script>

I didn't find it very easy.

Regards

[thesinnerishere]

<script type="text/javascript">
 
//inputs
var position = 2;
var arr = new Array (1,2,3,4,5);
 
//function
var offset = 0;
while (arr[1]) {
    var p = position - offset - 1;
    while (!arr[p])
    p -= arr.length;
    while (arr[p]) {
        offset = arr.length - p - 1;
        arr.splice(p, 1);
        //document.write(arr + '<br>' );
        p += position - 1;
    }
}
document.write ('<br>Answer = ' + arr[0]);
</script>

I didn't find it very easy.

Regards

thank you for the help. the concept of offset helped a lot.
thank you very much.