Berkus Decker berkus

The introduction to Reactive Programming you've been missing

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	////////// Usage ///////////

	this.BindRadioButtons(v => v.ViewModel.RadioButtonValue,
	v => v.RadioButtonA, "A",
	v => v.RadioButtonB, "B");

	////////// Implementation ///////////

	public static IDisposable BindRadioButtons<TSender, TViewModelValue>(this TSender view,
	Expression<Func<TSender, TViewModelValue>> viewModelProperty,


	// A thing I want to do
	// This flow only involves one promise, for example an ajax call
	// None of the subsequent `then` or `catch` calls, return new promises.



	var explode = false;
	var promise = new Promise(function(resolve, reject) {
	if (explode) {

	-- script.lua
	-- Receives a table, returns the sum of its components.
	io.write("The table the script received has:\n");
	x = 0
	for i = 1, #foo do
	print(i, foo[i])
	x = x + foo[i]
	end
	io.write("Returning data back to C\n");
	return x

	//@auto_closure hack to prevent `LLVM ERROR: unimplemented IRGen feature! non-fixed multi-payload enum layout`
	//as in https://github.com/maxpow4h/swiftz/blob/master/swiftz/Either.swift
	enum Either<L,R> {
	case Left(@auto_closure () -> L)
	case Right(@auto_closure () -> R)

	func flatMapLeft<L1>(f: (L) -> Either<L1, R>) -> Either<L1, R> {
	switch self {
	case let .Left(l): return f(l())
	case let .Right(r): return .Right(r)

	protocol Monad {
	typealias F
	typealias U
	class func bind<M : Monad where M.U == U>(Self, F -> M) -> M
	class func `return`(F) -> Self
	}


	extension Array : Monad {
	typealias F = T

	#import <Foundation/Foundation.h>
	#import <ReactiveCocoa/ReactiveCocoa.h>

	@interface PASDataSource : NSObject

	@property (nonatomic, strong, readonly) NSArray *passes;

	+ (PASDataSource *)sharedInstance;
	- (RACSignal *)refreshPassInfoSignal;

	protocol ISubscriber {
	typealias Element

	func disposable() -> RACCompoundDisposable

	func sendNext(e: Element)
	func sendError(e: NSError)
	func sendCompleted()
	}

	//
	// ViewController.swift
	// TestSwift
	//
	// Created by Jameson Quave on 6/2/14.
	// Copyright (c) 2014 JQ Software LLC. All rights reserved.
	//

	import UIKit