CodaFi

// Playground - noun: a place where people can play
// I wouldn't want a pair of birds that were... too demonstrative.


func idiot<A>(a : A) -> A {
	return a
}

func kestrel<A, B>(a : A) -> B -> A {
	return { _ in a }

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

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.

---

luca-bernardi

#import <Foundation/Foundation.h>

@interface LBRObject : NSObject
@end

@implementation LBRObject

- (void)execute
{
    @synchronized(self) {

nicklockwood

It's Impossible

I have reluctantly come to accept that it is impossible to create a "perfect" programming language. Every language is domain-specific in some sense, and many of the criteria that make a language good for one purpose are fundamentally in opposition to qualities that are good for another.

A classic example would be "scripting" languages versus "embedded" languages.

Good qualities in a scripting language are:

• Dynamic typing (no need to specify types, or cast between them)

chrismiles

""" File: reveal.py

Add to ~/.lldbinit:
    command script import ~/.lldb-scripts/reveal.py

Q: Want to automatically load the Reveal lib on launch while debugging from Xcode?
A: In Xcode:
    Add a Symbolic Breakpoint
    Symbol: "UIApplicationMain"
    Action: Debugger Command with value "reveal"

davedelong

@interface DDDelegateProxy : NSProxy

+ (id)proxyForDelegate:(id)delegate conformingToProtocol:(Protocol *)protocol;

@property (weak, readonly) id delegate;
@property (strong, readonly) Protocol *protocol;

/*!
 * Set a default return value for a method on the delegate's protocol.
 * \param value This must be a block that returns the default value.  Bad Things will happen if it's not.

steipete

// Taken from the commercial iOS PDF framework http://pspdfkit.com.
// Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
// Licensed under MIT (http://opensource.org/licenses/MIT)
//
// You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it.

// PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit.

#import <objc/runtime.h>
#import <objc/message.h>

JaviSoto

/**
 * @discussion takes the passed image parameter and displays a view controller modally that shwos the image
 * You can call it from the debugger like this:
 * expr JSDebugDisplayImage(image)
 * @note you can dismiss the view controller simply by tapping on it
 */
extern void JSDebugDisplayImage(UIImage *image);

mattt

Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep UI_APPEARANCE_SELECTOR ./*     | \
  sed 's/NS_AVAILABLE_IOS(.*)//g'     | \
  sed 's/NS_DEPRECATED_IOS(.*)//g'    | \
  sed 's/API_AVAILABLE(.*)//g'        | \
  sed 's/API_UNAVAILABLE(.*)//g'      | \
 sed 's/UI_APPEARANCE_SELECTOR//g' | \

rabovik

/**
 * Several macros simplifying use of weak references to self inside blocks
 * which goal is to reduce risk of retain cycles.
 *
 * Example:
 * @code
 
 @interface Example : NSObject{
    int _i;
 }