Deleting both values from array if duplicate - JavaScript/jQuery
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I have an array here:

    var myArr = [1, 1, 2, 5, 5, 7, 8, 9, 9];

Now I want to remove both appearances of a duplicate. So the desired result is **not**:

    var myArr = [1, 2, 5, 7, 8 ,9];

but

    var myArr = [2, 7, 8];

Basically I know how to remove duplicates, but not in that that special way. Thats why any help would be really appreciated!