import std/options, std/sugar, std/tables

func sameContents*[T](a: seq[T], b: seq[T]): bool =
  let aCount = toCountTable(a)
  let bCount = toCountTable(b)

  for k in aCount.keys:
    if not bCount.hasKey(k) or aCount[k] != bCount[k]: return false

  return aCount.len == bCount.len

func findBy*[T](s: seq[T], operation: (T) -> bool): Option[T] =
  for i in s:
    if operation(i):
      return some(i)
  return none[T]()

proc mapById*[T](records: seq[T]): TableRef[string, T] =
  result = newTable[string, T]()
  for r in records: result[r.id] = r