Javascript Array removeNegativity(arr)

// remove negatives
function removeNegativity(arr) {
  var numNegatives = 0;

  for (var i = 0; i < arr.length; i++) {
    if (arr[i] >= 0) {
      arr[i - numNegatives] = arr[i];/*w w w .ja  va2  s.  c  om*/
    } else {
      numNegatives++;
    }
  }

  arr.length -= numNegatives;

  return arr;
}