On Jul 11, 2011, at 5:13 PM, Roelof Wobben wrote: > What I try to achieve is this: > > > > [1,2,3,4] will be [1,2] [3,4] > > [1,2,3,4,5] will be [1,2,3] [3,4,5] So, I think what you want is this http://codepad.org/kjpbtLfR Is that correct?