matrix iterator written for collegue

it.coffee

class MatrixIterator
  positions: []

  constructor: (@arrays) ->
    @reset()

  reset: ->
    @hasNext = true

    for i in [0...@arrays.length]
      @positions[i] = 0

  next: ->
    unless @hasNext
      return null

    result = []

    for i in [0...@arrays.length]
      result.push @arrays[i][@positions[i]]

    @hasNext = false

    for i in [0...@arrays.length]
      @positions[i] += 1
      if @positions[i] < @arrays[i].length
        @hasNext = true
        break
      else
        @positions[i] = 0

    result


it = new MatrixIterator [
  [11000254, 11000255, 11000256]
  [11000257, 11000258]
  [11000259, 11000260]
]

while combination = it.next()
  console.log combination