alexbaldwin

# converts an image to png, extracts strokes, traces etc.
whiteboard() {
  convert "$1" "$1.converted.png"
  echo "Converted"
  convert "$1.converted.png" \
    -morphology Convolve DoG:15,100,0 \
    -negate -normalize -blur 0x1 -channel RBG \
    -level 60%,91%,0.1 \
    "$1.cleaned.png"
  echo "Cleaned"

JeOam

Author: https://www.cyanhall.com/

1. The Layer Tree

Core Animation's original name is Layer Kit

Core Animation is a compositing engine; its job is to compose different pieces of visual content on the screen, and to do so as fast as possible. The content in question is divided into individual layers stored in a hierarchy known as the layer tree. This tree forms the underpinning for all of UIKit, and for everything that you see on the screen in an iOS application.

In UIView, tasks such as rendering, layout and animation are all managed by a Core Animation class called CALayer. The only major feature of UIView that isn’t handled by CALayer is user interaction.

There are four hierarchies, each performing a different role:

mattt

// See: https://devforums.apple.com/message/1000934#1000934

import Foundation

// Logic

operator prefix ¬ {}
@prefix func ¬ (value: Bool) -> Bool {
    return !value
}

flatpickles

import SpriteKit

extension SKShapeNode {
    func setTiledFillTexture(imageName: String, tileSize: CGSize) {
        let targetDimension = max(self.frame.size.width, self.frame.size.height)
        let targetSize = CGSizeMake(targetDimension, targetDimension)
        let targetRef = UIImage(named: imageName).CGImage

        UIGraphicsBeginImageContext(targetSize)
        let contextRef = UIGraphicsGetCurrentContext()

abams

class ActiveSupport::TestCase

  def apple_receipt
    '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

ianklatzco

/* This code is derived from:
 * http://www.arduino.cc/en/Tutorial/Melody
 * This plays the chest noise from the Legend of Zelda on a piezo buzzer connected to pin 9 and ground. It has been tuned to a buzzer I had on hand, but you may want to adjust the values, testing against a tuner.
 */
  
int speakerPin = 0;
const int switchPin = 1;

char notes[] = "gabygabyxzCDxzCDabywabywzCDEzCDEbywFCDEqywFGDEqi        azbC"; // a space represents a rest
int length = sizeof(notes); // the number of notes

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

bobmoff

//
//  SKNode+TouchPriority.h
//  ButtonLab
//
//  Created by Fille Åström on 10/20/13.
//  Copyright (c) 2013 IMGNRY. All rights reserved.
//

#import <SpriteKit/SpriteKit.h>

calebd

Step 1: Configure the table view.

• Set a view as the table footer
• Set the background color to clear.

Step 2: Set the default table view values when your view loads. The values and variables seen here are explained below.

- (void)viewDidLoad {
    [super viewDidLoad];

mattt

Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep UI_APPEARANCE_SELECTOR ./*     | \
  sed 's/NS_AVAILABLE_IOS(.*)//g'     | \
  sed 's/NS_DEPRECATED_IOS(.*)//g'    | \
  sed 's/API_AVAILABLE(.*)//g'        | \
  sed 's/API_UNAVAILABLE(.*)//g'      | \
 sed 's/UI_APPEARANCE_SELECTOR//g' | \