# File lib/core/facets/array/missing.rb, line 13
        def missing
                missing, array = [], arrange
                i, length = 0, array.size - 1
                while i < length 
      x0 = array[i]
      x1 = array[i+1]
                        c = (Range === x0 ? x0.last  : x0)
                        n = (Range === x1 ? x1.first : x1)
                        missing << (
        c.succ.succ == n ? c.succ : ((c.succ)..(n.pred))
      )
                        i += 1
                end
    return missing
        end