k06a

@implementation UIImage (Grayscale)

UIImage *grayscaleImageFromCIImage(CIImage *image, CGFloat scale) {
    CIImage *blackAndWhite = [CIFilter filterWithName:@"CIColorControls" keysAndValues:kCIInputImageKey, image, @"inputBrightness", @0.0, @"inputContrast", @1.1, @"inputSaturation", @0.0, nil].outputImage;
    CIImage *output = [CIFilter filterWithName:@"CIExposureAdjust" keysAndValues:kCIInputImageKey, blackAndWhite, @"inputEV", @0.7, nil].outputImage;
    CGImageRef ref = [[CIContext contextWithOptions:nil] createCGImage:output fromRect:output.extent];
    UIImage *result = [UIImage imageWithCGImage:ref scale:scale orientation:UIImageOrientationUp];
    CGImageRelease(ref);
    return result;
}

k06a

@interface UIImage (ResizeableFallback)
- (UIImage *)resizableImageWithInsets:(UIEdgeInsets *)insets;
@end
@implementation
- (UIImage *)resizableImageWithInsets:(UIEdgeInsets *)insets
{
    if ([UIImage respondsToSelector:@selector(resizableImageWithCapInsets:)])
        return [self resizableImageWithCapInsets: insets];
    return [self stretchableImageWithLeftCapWidth:insets.left topCapWidth:insets.top];
}

k06a

// Copyright 2013 (c) Anton Bukov - https://github.com/k06a
// Inspired by http://graphics.stanford.edu/~seander/bithacks.html

#define P0(a) (a)
#define P1(a) (((P0(a) & 0x55555555) <<  1) | ((P0(a) & 0xAAAAAAAA) >>  1))
#define P2(a) (((P1(a) & 0x33333333) <<  2) | ((P1(a) & 0xCCCCCCCC) >>  2))
#define P3(a) (((P2(a) & 0x0F0F0F0F) <<  4) | ((P2(a) & 0xF0F0F0F0) >>  4))
#define P4(a) (((P3(a) & 0x00FF00FF) <<  8) | ((P3(a) & 0xFF00FF00) >>  8))
#define P5(a) (((P4(a) & 0x0000FFFF) << 16) | ((P4(a) & 0xFFFF0000) >> 16))

k06a

template<typename TI, typename TV>
int BinSearch(TI begin, TI end, TV value)
{
    int minIndex = 0;
    int maxIndex = end - begin - 1;

    while (minIndex <= maxIndex)
    {
        int midIndex = (minIndex + maxIndex) / 2;
        TI comparison = begin + midIndex;

k06a

//
// Here is some illustration of central kick:
// https://commons.wikimedia.org/wiki/File:Elastischer_stoß3.gif
//
//         V       -V
// [m = 2]--->    <---[m = 1]
//    [m = 2]      [m = 1]
//       [m = 2][m = 1]
//      [m = 2]      [m = 1]
//   <-[m = 2]            [m = 1]----->

k06a

//
// Usage: `[item.self anyMethod]` is valid for `item` equals to `[NSNull null]`
//
@interface NSNull (SelfOrNil)

@end

k06a

#import <Foundation/Foundation.h>

namespace cv {
    class Mat;
}

@interface NSValue (CVMat)

+ (instancetype)valueWithCVMat:(cv::Mat)mat;
@property (readonly) cv::Mat CVMatValue;

k06a

# Create and push new tags
for t in $(git tag | grep _); do git tag ${t//_//} $t; done
git push --tags

# Delete original tags
for t in $(git tag | grep _); do git tag -d $t && git push origin :refs/tags/$t; done

k06a

#
# Reorder property attributes in one possible way
#
# @property (nullable, readonly, assign, nonatomic, getter=isReady) BOOL ready;
#
# 1. Move readonly to the BEGIN of attribute list
# 2. Move nullable to the BEGIN of attribute list
# 3. Move null_resettable to the BEGIN of attribute list
# 4. Move nonatomic to the END of attribute list
# 5. Move getter to the END of attribute list

k06a

#import <QuartzCore/QuartzCore.h>
#import "Bike.h"


@implementation Bike {

}

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];