little-bites-of-cocoa-002-chainable-methods

1-chainable.swift

enum CountdownType: Int { case ToTheSecond, ToTheDay }
enum ColorScheme: Int { case AfterMidnight, ClassyYellow, Tealfish }

class Concern {
	var title: String = ""
	func title(aTitle: String?) -> Concern { title = aTitle ?? ""; return self }

	var subtitle = ""
	func subtitle(aSubtitle: String?) -> Concern { subtitle = aSubtitle ?? ""; return self }

	var countdownType: CountdownType = .ToTheSecond
	func countdownType(type: CountdownType) -> Concern { countdownType = type; return self }

	var colorScheme: ColorScheme = .AfterMidnight
	func colorScheme(scheme: ColorScheme) -> Concern { colorScheme = scheme; return self }
}

2-composable.swift

Concern()
  .title("Big Meeting")
  .subtitle("With those people from that place")
  .countdownType(.ToTheDay)
  .colorScheme(.Tealfish)

3-chainable-queries.swift

Event
    .withCategory(.Meeting)
    .withAttendees([User.me])
    .sort { $0.startDate < $1.startDate }