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function (add_copy_qt5_postbuild_step MY_APP_NAME MY_APP_BINARY_DIR)
ADD_CUSTOM_COMMAND(
    TARGET ${MY_APP_NAME} POST_BUILD

        # DEBUG
        COMMAND ${CMAKE_COMMAND} -E copy ${Qt5Core_DIR}/../../../bin/libEGLd.dll ${MY_APP_BINARY_DIR}
        COMMAND ${CMAKE_COMMAND} -E copy ${Qt5Core_DIR}/../../../bin/libGLESv2d.dll ${MY_APP_BINARY_DIR}
        COMMAND ${CMAKE_COMMAND} -E copy ${Qt5Core_DIR}/../../../bin/Qt53DCored.dll ${MY_APP_BINARY_DIR}
        COMMAND ${CMAKE_COMMAND} -E copy ${Qt5Core_DIR}/../../../bin/Qt53DExtrasd.dll ${MY_APP_BINARY_DIR}
        COMMAND ${CMAKE_COMMAND} -E copy ${Qt5Core_DIR}/../../../bin/Qt53DInputd.dll ${MY_APP_BINARY_DIR}

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1. Gemfile

gem 'browserify-rails', '1.5.0' # until fix: https://github.com/browserify-rails/browserify-rails/issues/101
gem 'react-rails'

Browserify-rails allows to use browserify within assets pipeline. React-rails is here only to allow to use #react_component (and thus, prerendering).

Note that jquery-rails can be removed from Gemfile, the npm version of jquery and jquery-ujs will be used instead.

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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:

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subscribeToEditorHideEvents = (id) ->

  CKEDITOR.instances[id].on 'instanceReady', (e) ->

    $('#cke_' + id + " [id$='_top']").hide()
    $('#cke_' + id + " [id$='_bottom']").hide()
    @on 'focus', ->
      $('#cke_' + id + " [id$='_top']").show()
      $('#cke_' + id + " [id$='_bottom']").show()

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Stop Versioning Rails Secret Tokens

After reading Code Climate's Rails' Insecure Defaults I realized I was guilty of breaking rule 3. Versioned Secret Tokens. Here's how I fixed it.

Use dotenv in development and test environments:

# Gemfile
gem 'dotenv-rails', groups: [:development, :test]

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+ (instancetype)sharedInstance
{
    static dispatch_once_t once;
    static id sharedInstance;
    dispatch_once(&once, ^{
        sharedInstance = [[self alloc] init];
    });
    return sharedInstance;
}

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class Integer
  N_BYTES = [42].pack('i').size
  N_BITS = N_BYTES * 16
  MAX = 2 ** (N_BITS - 2) - 1
  MIN = -MAX - 1
end

p Integer::MAX              #=> 4611686018427387903
p Integer::MAX.class        #=> Fixnum
p (Integer::MAX + 1).class  #=> Bignum

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// color - source color, which is must be replaced
// withColor - target color
// tolerance - value in range from 0 to 1
func replaceColor(color:SKColor, withColor:SKColor, image:UIImage, tolerance:CGFloat) -> UIImage{
    
    // This function expects to get source color(color which is supposed to be replaced) 
    // and target color in RGBA color space, hence we expect to get 4 color components: r, g, b, a
    assert(CGColorGetNumberOfComponents(color.CGColor) == 4 && CGColorGetNumberOfComponents(withColor.CGColor) == 4,
           "Must be RGBA colorspace")

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double delayInSeconds = 0.7;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void) {
   // Your code here..
});

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- (UIColor*) randomColor{
  
  CGFloat hue = ( arc4random() % 256 / 256.0 );  //  0.0 to 1.0
  CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from white
  CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from black
  UIColor *color = [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1];
  
  return color;
}