Marko Hlebar markohlebar

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

The introduction to Reactive Programming you've been missing

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.

Turning Off Github Issues

My friend Michael Jackson turned off github issues on one of his smaller projects. It got me thinking...

Maintainers getting burned out is a problem. Not just for the users of a project but the mental health of the maintainer. It's a big deal for both parties. Consumers want great tools, maintainers want to create them, but maintainers don't want to be L1 tech support, that's why they

	NSImage *computerImage = [NSImage imageNamed:NSImageNameComputer];
	NSInteger size = 256;

	NSBitmapImageRep *rep = [[NSBitmapImageRep alloc]
	initWithBitmapDataPlanes:NULL
	pixelsWide:size
	pixelsHigh:size
	bitsPerSample:8
	samplesPerPixel:4
	hasAlpha:YES

	// 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>

	#!/usr/bin/ruby
	# Create display override file to force Mac OS X to use RGB mode for Display
	# see http://embdev.net/topic/284710

	require 'base64'

	data=`ioreg -l -d0 -w 0 -r -c AppleDisplay`

	edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten
	vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten

	#import <Foundation/Foundation.h>

	// This helps deal with NSPointerArray that stores pointers to objects that inherit from NSObject.
	// Not sure if this will work for other pointer types!!
	@interface NSPointerArray (Helpers)

	/**
	* Adds pointer to the given object to the array.
	*
	* @param object Object whose pointer needs to be added to the array.

	// The correct implementation of `Equatable` (and `Comparable`) can be tricky for class
	// hierarchies. To make it easier, it is better to follow a well-defined pattern. Here
	// is my suggestion on how to do it:

	// 1. Define a protocol for polymorphic test function for equality (or comparison):
	// Note: operators are not polymorphic (not virtual in C++ terms)). The function to
	// call is determined and hard-coded at compile time.

	/// A protocol to ammend `Equatable` for use with `class` types.

	NSUInteger PSPDFHashFromCGRect(CGRect rect) {
	return ((NSUInteger )&rect.origin.x << 10 ^ (NSUInteger )&rect.origin.y) + ((NSUInteger )&rect.size.width << 10 ^ (NSUInteger )&rect.size.height);
	}

	- (void)testMethodExpectingNoError
	{
	id someObject = [self someMethodThatReturnsAnExpectedObject];
	id mockDependencuy = OCMClassMock([DependencyToBeMocked class]);
	OCMStub([mockDependency someMethodWithErrorRef:[OCMArg anyObjectRef]).andReturn(someObject);

	NSError * error = nil;
	id someReturnedValue =[self.objectUnderTest someMethodWithErrorRef:&error]:

	XCTAssertNotNil(someReturnedValue);