rnapier

import Foundation

@dynamicMemberLookup
enum JSON: Codable, CustomStringConvertible {
    var description: String {
        switch self {
        case .string(let string): return "\"\(string)\""
        case .number(let double):
            if let int = Int(exactly: double) {
                return "\(int)"

calebd

//  Created by Caleb Davenport on 7/14/17.

import UIKit

final class ActionSheetPresentationController: UIPresentationController {

    // MARK: - Properties

    private var dimmingView: UIView!

chriseidhof

import Foundation

// A lens is a getter and a setter combined
struct Lens<Whole, Part> {
    let get: (Whole) -> Part
    let set: (inout Whole, Part) -> ()
}

// We can create a lens from a key path
extension Lens {

ddunbar

New Build System Tricks

Command Line

alias xcbuild=$(xcode-select -p)/../SharedFrameworks/XCBuild.framework/Versions/A/Support/xcbuild
# THIS DOESNT WORK YET: xcbuild openIDEConsole  # … then switch to Xcode ➡️
xcbuild showSpecs
xcbuild build <foo.pif> [—target <target>]

phausler

import Foundation

struct HashingSingleValueEncodingContainer : SingleValueEncodingContainer {
    var owner: HashingEncoder

    mutating func combineHash<T>(of element: T?) where T: Hashable {
        if let elt = element {
            owner.combine(elt, hash: elt.hashValue) { (other: Any) -> Bool in
                if let otherValue = other as? T {
                    return elt == otherValue

boredzo

man() {
	env \
		LESS_TERMCAP_md=$'\e[1;36m' \
		LESS_TERMCAP_me=$'\e[0m' \
		LESS_TERMCAP_se=$'\e[0m' \
		LESS_TERMCAP_so=$'\e[1;40;92m' \
		LESS_TERMCAP_ue=$'\e[0m' \
		LESS_TERMCAP_us=$'\e[1;32m' \
			man "$@"
}

andymatuschak

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

chockenberry

#!/bin/sh

defaults read com.apple.finder CreateDesktop > /dev/null 2>&1
enabled=$?

if [ "$1" = "off" ]; then
	if [ $enabled -eq 1 ]; then
		defaults write com.apple.finder CreateDesktop false
		osascript -e 'tell application "Finder" to quit'
		open -a Finder

bomberstudios

This is what Craft does:

function loadFramework(pluginRoot) {
  if (NSClassFromString('PanelsManager') == null) {
    var mocha = [Mocha sharedRuntime];
    return [mocha loadFrameworkWithName:'Panels' inDirectory:pluginRoot];
  } else {
    return true;
 }

chriseidhof

import Cocoa

class MyAppDelegate: NSObject, NSApplicationDelegate {
    let window = NSWindow()
    var didFinishLaunching: NSWindow -> () = { _ in () }
    func applicationDidFinishLaunching(aNotification: NSNotification) {
        didFinishLaunching(window)
    }
}