Arrays Equal in CoffeeScript

arraysEqual.coffee

arraysEqual = (nums1, nums2) ->
  # Check the length
  return false unless nums1.length == nums2.length

  # Sort the arrays
  nums1.sort()
  nums2.sort()

  # A helper for checking indices are same
  sameNums = (idx) -> nums1[idx] == nums2[idx]

  for num, i in nums1
    # If we get a different number, return false
    return false unless sameNums i

  # All numbers are the same
  return true

# Some tests
tests = [
  [[1,2,3], [1,2,3]],
  [[1,2,3], [1,2,3,4]],
  [[1,2,3], [1,2,3,3]],
  [[3,2,1], [1,2,3]],
] 

# Output the test results
console.log "Test#{testNum}:", arraysEqual.apply(this, test) for test, testNum in tests