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/*
 Enum with Fixed Underlying Type
 New with Xcode 4.4
 Via WWDC2012 Session 405 - Modern Objective-C

 Results in better code completion and stronger type checking.
 Use -Wconversion compiler flag to check for enum type errors.
 -Wswitch for checking if switch statement is fully handled for enum.
*/

ksm

// Source: Stanford CS193P November 16, 2010 Lecture 16
// Use case: lots of Core Data changes. You want them to save once they settle down.

- (void)delayedSave:(NSManagedObjectContext *)ctxt 
{
    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(doSave:) object:ctxt];
    [self performSelector:@selector(doSave:) withObject:ctxt afterDelay:1.0];
}

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# .gitignore in use by Joris Kluivers
#
# Latest version:
# https://gist.github.com/gists/1923197

*.DS_Store

# Xcode
*.pbxuser
*.mode1v3

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/*
Thanks to @_bejo
*/

- (void)_insertGlobalRoomMessage:(id)msg atIndex:(NSUInteger)index
{
    NSIndexSet *changeSet = [NSIndexSet indexSetWithIndex:index];
    [self willChange:NSKeyValueChangeInsertion valuesAtIndexes:changeSet forKey:@"globalRoomMessages"];
    [(NSMutableArray *)self.globalRoomMessages insertObject:msg atIndex:index];
    [self didChange:NSKeyValueChangeInsertion valuesAtIndexes:changeSet forKey:@"globalRoomMessages"];

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/* 
Source: Apple Developer - Understanding iOS View Compositing
*/

// setup the layer
CALayer *layer = view.layer;
layer.bounds = sublayer_bounds;
layer.backgroundColor = random_color();

// set the shadow properties on the layer

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/*
Source: Apple Developer - Understanding iOS View Compositing
Note: setting view.layer.cornerRadius and .masksToBounds
sends the view for rending to an offscreen buffer.
We want to avoid unnecessary rendering passes. 
Let the context do the work. 
*/

- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
	CGRect rect = layer.bounds;

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/*
Source: Apple Developer - Understanding iOS View Compositing
*/

- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
	UIImage *image = [self loadImage];
	
	if (image != nil) {
		CGSize s = image.size;
		CGRect r = layer.bounds;

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// via @_bejo
// then just add a DEBUG = 1 to debug target in xcode

#ifdef DEBUG

#define DebugLog( s, ... ) NSLog( @"<%@:(%d)> %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )

#else
#define DebugLog( s, ... ) 

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/*
Copied and pasted from David Hamrick's blog:

Source: http://www.davidhamrick.com/2011/12/31/Changing-the-UINavigationController-animation-style.html
*/

@interface UINavigationController (Fade)

- (void)pushFadeViewController:(UIViewController *)viewController;
- (void)fadePopViewController;

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/*
Copied and pasted from David Hamrick's blog. 

Source: http://www.davidhamrick.com/2011/08/07/using-blocks-for-drawing-to-avoid-subclasssing-in-objective-c.html
*/

typedef void(^DrawView_DrawBlock)(UIView* v,CGContextRef context);

@interface DrawView : UIView