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Swift Tip: Protocols vs. Values
Extensible in different ways
View networking.swift
import Foundation
struct Resource<A> {
var request: URLRequest
var parse: (Data) throws -> A
extension Resource where A: Decodable {
init(get url: URL) {
self.init(request: URLRequest(url: url)) { data in
View graph.swift
import Foundation
Talking points
- It's hard for Node to conform to Codable, because of references
- This is a problem in both directions. For encoding, we need to keep track of what we've already seen. For decoding, we need two-phase initialization.
- But we can convert to sparsegraph, and then we get conformance for free
- to do this, an iterator over all reachable nodes really helps!
View nsnorth.swift
import UIKit
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var rootVC: UINavigationController? = nil
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
window = UIWindow(frame: UIScreen.main.bounds)
View fusion.swift
// main.swift
// Deforestation
// Created by Chris Eidhof on 29.03.19.
// Copyright © 2019 All rights reserved.
import Foundation
struct Build<Element, Result> {
View ParseLib.swift
// ParseLib.swift
// JsxLib
// Created by Chris Eidhof on 19.02.19.
import Foundation
public struct ParseError: Error {
View folds.swift
struct Reducer<Element, A> {
let empty: A
let combine: (A, Element) -> A
func sum() -> Reducer<Int, Int> {
return Reducer(empty: 0, combine: +)
func count<A>() -> Reducer<A, Int> {
View incremental.swift
// Incremental.swift
// Bits
// Created by Chris Eidhof on 22.11.18.
public typealias Token = Int
fileprivate struct Register<A> {
View optionparser.swift
// main.swift
// OptionParser
// Created by Chris Eidhof on 28.02.19.
// Copyright © 2019 All rights reserved.
import Foundation
chriseidhof / sql.swift
Last active Feb 22, 2019
String Interpolation Experiments
View sql.swift
// main.swift
// StringLiterals
// Created by Chris Eidhof on 21.02.19.
// Copyright © 2019 All rights reserved.
import Foundation
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