from sequtils import anyIt

template `?:`*(a, b: string): string =
  if len(a) > 0: a else: b

template `?:`*(a: object, b: string): string =
  if a: $a else: b

template `?:`*(a: ref, b): auto =
  if a != nil: a else: b

template `?:`*(a, b: object): object =
  if a: a else: b

template `?:`*(a, b): auto =
  if a: a else: b

template `?.`*(a: ref, b: untyped): auto =
  if a != nil: a.b else: nil

proc sameContents*[T](a1, a2: openArray[T]): bool =
  # Answers the question: do these two arrays contain the same contents,
  # regardless of their order?
  if a1.len != a2.len: return false
  for a in a1:
    if not a2.anyIt(a == it): return false
  return true