This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
; Comments start with semicolons. | |
; Clojure is written in "forms", which are just | |
; lists of things inside parentheses, separated by whitespace. | |
; | |
; The clojure reader assumes that the first thing is a | |
; function or macro to call, and the rest are arguments. | |
; | |
; Here's a function that sets the current namespace: | |
(ns test) |
// Defines a yet undocumented method to add a warning if super isn't called. | |
#ifndef NS_REQUIRES_SUPER | |
#if __has_attribute(objc_requires_super) | |
#define NS_REQUIRES_SUPER __attribute((objc_requires_super)) | |
#else | |
#define NS_REQUIRES_SUPER | |
#endif | |
#endif | |
@interface UIViewController (SubclassingWarnings) |
NSString *safe = self.keys.url.port.stringValue; | |
NSString *unsafe = @"url.port.stringValue"; | |
assert([safe isEqualToString:unsafe]); |