zmcartor

import UIKit

struct FrontScreenViewmodel {
    var hello = "there"
}

// Builds the ViewControllers, and injects the ViewModels
class Factory {
    
    let viewModelFactory = ViewModelFactory()

zmcartor

/* Usage

let log = OSLog(subsystem: "deep-secrets", category: "cookie-recipes")
let signpostID = log.beginSignpost(withName: "signpost name")

... Do work ...

log.endSignpost(withName: "signpost name" , signpostId: signpostId)

Signposts can also be started w objects instead of SignpostIDs when scope is an issue

zmcartor

extension UIImageView {
    func setImage(from url: URL, withPlaceholder placeholder: UIImage? = .none, withCache cache:NSCache<NSURL,UIImage>? = .none) -> URLSessionDataTask? {
        
        if let cached = cache?.object(forKey: url as NSURL) {
            self.image = cached
            return .none
        }
        
        self.image = placeholder
        let task = URLSession.shared.dataTask(with: url)  { (data, _, _) in

zmcartor

enum Result<T> {
    case success(T)
    case error(Error)
}

struct ToDo : Codable {
    var id: Int
    var userId: Int
    var title:String
    var completed:Bool

zmcartor

let field = [0,0,0,0,1,0,0,0,1,0,1,1,0,0,0,1,1,0,0,0,0,1,1,0,0,1,1]

var memo:[Int:[Int:Bool]] = [0:[:]]


func bounce(startingSpeed:Int, startingIndex:Int, field:[Int]) -> Bool {

    // Many base cases. We must still be on the runway.
    // We must land on a place with 0 (no spikes)
    // Use a double dictionary as the memo. Store true/false. 1 dimension for each changing intput!!!!

zmcartor

+ (BOOL)resolveClassMethod:(SEL)name {
    NSString *classname = NSStringFromClass([self class]);
    NSString *selectorString = [NSString stringWithFormat:@"crazyClass%@",classname];
    NSLog(@"string is %@", selectorString);
    SEL ourSelector = NSSelectorFromString(selectorString);
    
    if (name == ourSelector) {
        // adding class method to meta-class
        Class ourClass = object_getClass(NSClassFromString(classname));
        class_addMethod(ourClass, ourSelector, (IMP)crazyClassMethod, "@v:@");

zmcartor

+ (BOOL)resolveInstanceMethod:(SEL)aSEL {
    NSString *classname = NSStringFromClass([self class]);
    NSString *selectorString = [NSString stringWithFormat:@"insaneInstance%@",classname];
    SEL ourSelector = NSSelectorFromString(selectorString);
    if (aSEL == ourSelector) {
        class_addMethod([self class], aSEL, (IMP)insaneInstanceMethod, "v@:");
        return YES;
    }
    return [super resolveInstanceMethod:aSEL];
}

zmcartor

func unwrap<T:Any>(dictionary:[String : AnyObject], key:String, defaultValue:T) -> T {
        let value = dictionary[key] as? T ?? defaultValue
        return value as T
    }


// Can be curried inside a init?(json:NSDictionary) function 

        let stringAtKey:(String) -> String = { key in
            return unwrap(dictionary , key:key, defaultValue:"")

zmcartor

hello() { name in 

... some code ...

	anotherMethod { anotherThing in 
			.. I'm nested in two closures
		}
}

zmcartor

import XCPlayground
import AudioKit

let osc = AKWhiteNoise()
let filter = AKLowPassFilter(osc, cutoffFrequency: 200, resonance: 3)
osc.start()

let verb = AKReverb(filter)
verb.dryWetMix = 0.5