Sintactic sugar for chainable actions over objects
It provides some methods to make creating and working with objects in a functional way.
func then(_ block: (inout Self) throws -> Void) rethrows -> Self
For Value types. Allows chained modifications.
struct Obj {
var a: String
var b: Int
}
let o = Obj(a: "hola", b: 0)
let c = o.then {
$0.a = "adios"
}func then(_ block: (Self) throws -> Void) rethrows -> Self
Same as previous but for Reference types. Very useful for in-place initialization.
class VC: UIViewController {
lazy var button = UIButton().then {
$0.addTarget(self, action: #selector(action), for: .touchUpInside)
}
@IBAction
func action() {
…
}
}func do(_ block: (Self) throws -> Void) rethrows
Allows terminations actions with objects
Obj(a: "hola", b: 0).then { $0.b = 3 }.do(print)