Pascal's Triangle in CoffeeScript

pascals-triangle.coffee

pascalsTriangle = (width) ->
  set = []
  prev = pascalsTriangle(width - 1) if width > 1
  for i in [0...width]
    if prev and prev[i-1] and prev[i]
      set.push prev[i-1] + prev[i]
    else
      set.push 1
  console.log set.join(' ')
  set