jspahrsummers

	Hot	Cold	Notes
Behaviors	Always		Property values over time
Events	Maybe	Maybe	This is a design decision, but picking “hot” requires introducing some concept of buffering
Promises	Sorta	Sorta	Promises don't do work until started, but only do it once, and share/buffer their result

mattbischoff

//
//  LCKIndexedFetchedResultsController.h
//  Quotebook
//
//  Created by Andrew Harrison on 7/26/14.
//  Copyright (c) 2014 Lickability. All rights reserved.
//

@import CoreData;

thanegill

//: Playground - noun: a place where people can play

// Got most of it from:
// https://developer.apple.com/sample-code/wwdc/2015/downloads/Crustacean.zip
// This is in the Protocol-Oriented Programming in Swift talk
// Pay special attention to the Heterogeneous Equality section, on page 2.
//
// Most comments directly copy/pasted from Crustacean Playground

protocol Account {

steipete

static NSData *PSPDFCalculateSHA256FromFileURL(NSURL *fileURL, CC_LONG dataLength, NSError **error) {
    NSCParameterAssert(fileURL);

    NSData *shaData;

    int fd = open(fileURL.path.UTF8String, O_RDONLY);
    if (fd < 0) {
        if (error) *error = [NSError pspdf_errorWithCode:PSPDFErrorCodeUnableToOpenPDF description:@"Failed to open file for calculating SHA256."];
        return nil;
    }

irace

protocol TextContaining {
    var isEmpty: Bool { get }
}

extension String: TextContaining {
}

extension Optional where Wrapped: TextContaining {
    var isEmpty: Bool {
        switch self {

janodev

#import <Foundation/Foundation.h>

@interface MySingleton : NSObject

+(instancetype) sharedInstance;

// clue for improper use (produces compile time error)
+(instancetype) alloc __attribute__((unavailable("alloc not available, call sharedInstance instead")));
-(instancetype) init  __attribute__((unavailable("init not available, call sharedInstance instead")));
+(instancetype) new   __attribute__((unavailable("new not available, call sharedInstance instead")));

dabrahams

//===----------------------------------------------------------------------===//
//===--- Defining Collections, easy as Pie --------------------------------===//
//===----------------------------------------------------------------------===//
struct Digits : PieCollection {
  let startState: Optional = 0
  func iterate(from state: Int) -> (nextState: Int?, element: Int) {
    return (nextState: state+1 < 10 ? state+1 : nil, element: state)
  }
}

irace

final class CenteringView: UIView {
    // MARK: - Initialization
    
    init(contentView: UIView) {
        super.init(frame: .zero)
        
        addSubview(contentView)
        contentView.translatesAutoresizingMaskIntoConstraints = false
        
        NSLayoutConstraint.activateConstraints([

davbeck

import Foundation
import JavaScriptCore


/// Used to lookup our Bundle.
private class MomentBundleClass: NSObject {}


/// A wrapper around a moment.js object.
public struct Moment {

chriseidhof

// Variables just contain an integer. We can have a maximum of `Int.max` variables in our program.  ¯\_(ツ)_/¯

private struct Var {
    static var freshVarIx = 0
    let ix: Int
    init() {
        Var.freshVarIx+=1
        ix = Var.freshVarIx
    }
}