gonejack

macro_rules! switch {
    ($($a:expr => $b:expr;)* _ => $e:expr $(,)?) => {
        match () {
            $(_ if $a => $b,)*
            _ => $e,
        }
    };
}

fn f1() -> bool {

gonejack

// 推荐做法：
static class Stop extends Thread {
    static void init() {
        Runtime.getRuntime().addShutdownHook(new Stop());
    }

    @Override
    public void run() {
        Thread.currentThread().setName("stop");

gonejack

source /usr/local/go/src/pkg/runtime/runtime-gdb.py
b main.main

gonejack

brew install go
export GOROOT="/usr/local/opt/go/libexec"
export GOPATH="$HOME/.go"
export PATH="$PATH:$GOROOT/bin:$GOPATH/bin"

gonejack

使用ffmpeg合并MP4文件

ffmpeg -i "Apache Sqoop Tutorial Part 1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i "Apache Sqoop Tutorial Part 2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "Apache Sqoop Tutorial Part 3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate3.ts
ffmpeg -i "Apache Sqoop Tutorial Part 4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate4.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts|intermediate3.ts|intermediate4.ts" -c copy -bsf:a aac_adtstoasc "Apache Sqoop Tutorial.mp4"

gonejack

Install Homebrew OS X package manager:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Install ffmpeg with x265 support:
brew install ffmpeg --with-fdk-aac --with-sdl2 --with-freetype --with-libass --with-libvorbis --with-libvpx --with-opus --with-x265

Convert video to x265:
ffmpeg -i input -c:v libx265 -preset medium -crf 28 -c:a aac -b:a 128k output.mp4

Uninstall ffmpeg:

gonejack

public class MainClass {

  public static void main(String[] args){

    ClassLoader classLoader = MainClass.class.getClassLoader();

    try {
        Class aClass = classLoader.loadClass("com.jenkov.MyClass");
        System.out.println("aClass.getName() = " + aClass.getName());
    } catch (ClassNotFoundException e) {

gonejack

console.clear();
var img = new Image();
img.src = 'img/img.png';
img.onload = function () {
	var canvas = document.createElement('canvas'), context = canvas.getContext('2d');
	canvas.width = img.width;
	canvas.height = img.height;
	context.drawImage(img, 0, 0, img.width, img.height);

	console.log(canvas.toDataURL('image/png'));

gonejack

// hard won knowledge from http://stackoverflow.com/questions/20035615/using-raw-image-data-from-ajax-request-for-data-uri
var xmlHTTP = xhr.XMLHttpRequest();
xmlHTTP.open('GET', url, true);
xmlHTTP.responseType = 'arraybuffer';
xmlHTTP.onload = function(e) {
  var arr = new Uint8Array(this.response);
  var raw = String.fromCharCode.apply(null,arr);
  var b64 = base64.encode(raw);
  var dataURL="data:image/png;base64," + b64;
};

gonejack

'isInFrame': function () {
			try {
				return window.self !== window.top;
			}
			catch (e) {
				return true;
			}
		}