robertmryan

override func didMoveToView(view: SKView) {
    let sprite = SKSpriteNode(imageNamed:"Spaceship")
    sprite.xScale = 0.25
    sprite.yScale = 0.25
    addChild(sprite)
    
    let origin = view.convertPoint(view.bounds.origin, toScene: self)
    let lowerRight = view.convertPoint(CGPoint(x: CGRectGetMaxX(view.bounds), y:CGRectGetMaxY(view.bounds)), toScene: self)
    let visibleFrame = CGRect(x: origin.x, y: origin.y, width: lowerRight.x - origin.x, height: lowerRight.y - origin.y)
    let path = sinePathInRect(visibleFrame)

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let manager = AFHTTPSessionManager()
manager.GET("http://example.com/resources.json", parameters: nil, progress: nil, success: { (task: NSURLSessionDataTask, responseObject: AnyObject?) -> Void in
    print("JSON: \(responseObject!)")
}, failure: { (task: NSURLSessionDataTask?, error: NSError) -> Void in
    print("Error: %@", error)
})

robertmryan

override func viewDidLoad() {
    super.viewDidLoad()
    
    func sgn(x: Double) -> Double {
        switch x {
        case _ where x < 0:
            return -1.0
        case _ where x > 0:
            return 1.0
        default:

robertmryan

//: **Sort strings by numeric values only; ignoring non-numeric portions of strings**

import Cocoa

//: Persuant to [http://stackoverflow.com/a/35962434/1271826](http://stackoverflow.com/a/35962434/1271826), this illustrates a more concise way to accomplish what Mountain Man posted. This suffers from the same limitations as his code, though:
//:
//: - non-continguous numbers will be treated as single number (e.g. "He is 5 feet 10 inches tall" will be `510`);
//: - does not handle negative numbers; and
//: - does not handle floating point numbers

robertmryan

// this behaves as expected

- (void)exampleOne {
    dispatch_async(queue, ^{
        [NSThread sleepForTimeInterval:10];
        NSLog(@"10s --- %@", [NSThread currentThread]);
    });

    dispatch_async(queue, ^{
        [NSThread sleepForTimeInterval:5];

robertmryan

@interface Triangle : NSObject

@property (nonatomic) double sideALength;
@property (nonatomic) double sideBLength;
@property (nonatomic) double height;
@property (nonatomic, readonly) double area;

@end

@implementation Triangle

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func subscript(index: Int) -> T {
    guard index >= 0 && index < count else {
        fatalError("Index out of range 0 ..< \(count)")
    }
    
    switch index {
    case 0:
        return head!.value
    case count-1:
        return tail!.value

robertmryan

func makeHTTPGetRequest(path: String, onCompletion: (JSON?, NSError?) -> ()) {
    let request = NSMutableURLRequest(URL: NSURL(string: path)!)
    let session = NSURLSession.sharedSession()
    let task = session.dataTaskWithRequest(request) { data, response, error in
        if let jsonData = data {
            var parseError: NSError?
            let json:JSON = JSON(data: jsonData, error: &parseError)
            onCompletion(json, parseError)
        } else {
            onCompletion(nil, error)

robertmryan

//
//  ViewController.swift
//
//  Created by Robert Ryan on 7/4/16.
//  Copyright © 2016 Robert Ryan. All rights reserved.
//

import Cocoa

class TwoDigitFormatter: NumberFormatter {

robertmryan

class SingletonManager {
    static let sharedObjectA = ObjectA()
}

class ObjectA {
    func performAsyncTask(completionHandler: (String) -> ()) {
        // perform something asynchronous which will call `completionHandler` later
        completionHandler("foo")
    }
}