tabuchid

// Asynchronously loads UIImages from the given URLs, but throttles the loading
// to keep memory and CPU usage sane.
- (RACSignal *)loadImagesAtURLs:(NSArray *)imageURLs {
    // Map each URL to a signal of work. The result is a signal of work signals.
    return [[imageURLs.rac_signal
        map:^(NSURL *imageURL) {
            return [[[[NSURLConnection
                // Load the URL asynchronously.
                rac_sendAsynchronousRequest:[NSURLRequest requestWithURL:imageURL]]
                reduceEach:^(NSURLResponse *response, NSData *data) {

tabuchid

##Some apps to install before moving forward:

Direct links included, if you trust me ;)

• F.lux
  • https://justgetflux.com
  • direct: https://justgetflux.com/dlmac.html
  • temp fix on 10.10: disable automatic graphics switching (System Preferences -> Energy Saver)
• Spectacle
  • http://spectacleapp.com
  • direct: https://s3.amazonaws.com/spectacle/downloads/Spectacle+0.8.5.zip
• iTerm 2

tabuchid

/// Observes a run loop to detect any stalling or blocking that occurs.
///
/// This class is thread-safe.
@interface GHRunLoopWatchdog : NSObject

/// Initializes the receiver to watch the specified run loop, using a default
/// stalling threshold.
- (id)initWithRunLoop:(CFRunLoopRef)runLoop;

/// Initializes the receiver to detect when the specified run loop blocks for

tabuchid

#System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

##Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?