Here's my version without using reverse or underscore. If coffeescript supported reverse loops or negative indices, this would be a lot cleaner. add1 = (ar

Here's my version without using reverse or underscore. If coffeescript supported reverse loops or negative indices, this would be a lot cleaner. add1 = (arr, val, n)-> d = Math.abs(n||1)/(n||1) n = if n is 0 then arr.length else Math.abs n i = if d < 0 then arr.length - 1 else 0 end = if d < 0 then 0 else arr.length while n and i isnt end num = arr[i] if num is val n-- arr[i]++ i = i + d arr