Javascript Array remove(pred)

Array.prototype.remove = function(pred) {
  var removed = this.filter(function(item) {
    return pred(item)
  })// w  w w  . j a v a2s.  c  o  m

  this.forEach(function(i, index, arr) {
    if (removed.indexOf(i) !== -1) arr.splice(index, 1)
  })

  return removed
}

var arr = [1, 2, 3, 4, 5, 6]
var removed = arr.remove(function(e) {return e % 2 === 0})
console.log(arr)
console.log(removed)