vikingosegundo

let t1 = t0.alter(.unfinish)

vikingosegundo

let t1 = t0.alter(.finish)

vikingosegundo

let t0 = TodoItem(title:"Get Coffee")
let t1 = t0.alter(.title("Get Coffee — ASAP"))

vikingosegundo

struct TodoItem:Identifiable {
    enum Change {
        case title   (to:String)
        case due     (to:TodoDate)
        case location(to:Location)
        case   finish
        case unfinish
    }
    // members
    let id       : UUID

vikingosegundo

let romans = (1...100).map { roman(for: $0) } // numerals from ints
let ints = romans.map { from(roman: $0) }     // ints from numerals
(zip(ints, romans)).forEach { x in
    print(x)
}

vikingosegundo

import Foundation

extension Int {
    func times(_ text: String) -> String {
        (0..<self).reduce(""){ e, _ in e + text }
    }
}

let digits = [
    ("I", "V", "X"),

vikingosegundo

Button {  decrease(value:.colortemp,by:10.pt,on:light) } 
    label: {
        Image(systemName:"thermometer.sun")
            .foregroundStyle(ctColor(ct:(Double(temperatureValue(of: light)) * 0.8)))
            .accessibility(label:Text("decrease color temperature"))
}

vikingosegundo

private func decrease(value:Light.Value,by dec:Light.Value.Increment, on light:Light) { rootHandler( .lighting(.decrease(value,by:dec,on:light)) ) }

vikingosegundo

Slider(value: $ct, in: (-500)...(-153)) { _ in
    apply(values: .ct(Int(-ct),bri), on: light)
}

vikingosegundo

private func apply(values:Light.Values,on light:Light) { 
               rootHandler( .lighting(.apply(.values(values),on:light)) ) 
}