ComparisonResult

ascii 를 기준으로 정렬 되는 방식을 나타낸다.

These constants are used to indicate how items in a request are ordered, from the first one given in a method invocation or function call to the last (that is, left to right in code).

Given the function: NSComparisonResult f(int a, int b)

If: a < b then return NSOrderedAscending. The left operand is smaller than the right operand. a > b then return NSOrderedDescending. The left operand is greater than the right operand. a == b then return NSOrderedSame. The operands are equal.

@frozen public enum ComparisonResult : Int {
  case orderedAscending = -1
  case orderedSame = 0
  case orderedDescending = 1
}

public typealias Comparator = (Any, Any) -> ComparisonResult