zmcartor’s gists

zmcartor / mvvmc.swift

Created August 19, 2021 03:16

MVVM+Coordinator Architecture

	import UIKit

	struct FrontScreenViewmodel {
	var hello = "there"
	}

	// Builds the ViewControllers, and injects the ViewModels
	class Factory {

	let viewModelFactory = ViewModelFactory()

zmcartor / OSLog+Extensions.swift

Created March 18, 2019 18:13

OSLog extension for os_signpost usage

	/* 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 / UIImageView+loadFromURL-extension.swift

Last active November 12, 2018 23:09

UIImageView load from URL, placeholder and cache

	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 / GenericStack.swift

Created October 30, 2018 03:27

Swift Network Stack

zmcartor / dynamic-programming.swift

Created May 25, 2018 16:11

Dynamic Programming with field of spikes in Swift

	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 / class-method.m

Created April 17, 2018 15:27

Dynamic Class Method ObjC

	+ (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 / dynamic-instance-method.m

Created April 17, 2018 15:25

Dynamic Instance Method ObjC

	+ (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 / unwrap.swift

Last active March 23, 2017 19:05

Unwrap from JSON dict with default value

	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 / gist:0b110b8c945013a2b9c2bde02fd282b4

Created October 19, 2016 15:23

Nested Closures

	hello() { name in

	... some code ...

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

zmcartor / robotRumble.swift

Last active July 13, 2016 01:22

Robot Rumble Noise Generator

	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

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