Yossi Elkrief MaTriXy

Centralize the support libraries dependencies in gradle

Working with multi-modules project, it is very useful to centralize the dependencies, especially the support libraries.

A very good way is to separate gradle build files, defining something like:

root
  --gradleScript
 ----dependencies.gradle

Libraries

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

	import android.content.Context;
	import android.content.res.TypedArray;
	import android.graphics.Canvas;
	import android.graphics.Rect;
	import android.graphics.drawable.Drawable;
	import android.support.v7.widget.LinearLayoutManager;
	import android.support.v7.widget.RecyclerView;
	import android.util.AttributeSet;
	import android.view.View;

	import android.graphics.PointF;
	import android.view.animation.Interpolator;



	/**
	* From https://github.com/codesoup/android-cubic-bezier-interpolator
	* Derived from: https://github.com/rdallasgray/bez
	*/
	public class CubicBezierInterpolator implements Interpolator {

	<?xml version="1.0" encoding="utf-8"?>
	<selector xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:state_enabled="false"
	android:color="@color/flat_disabled_text"/>
	<item android:color="@color/flat_normal_text"/>
	</selector>

	#!/usr/bin/python

	# License for any modification to the original (linked below):
	# ----------------------------------------------------------------------------
	# "THE BEER-WARE LICENSE" (Revision 42):
	# Sebastiano Poggi and Daniele Conti wrote this file. As long as you retain
	# this notice you can do whatever you want with this stuff. If we meet some day,
	# and you think this stuff is worth it, you can buy us a beer in return.

	import argparse, sys, subprocess, tempfile

	final class Completion<R> {

	private let closure: (R) -> Void
	private var cancelled = false

	/// `closure` is called upon completion, if not cancelled.
	init(closure: (R) -> Void) {
	self.closure = closure
	}

	$ git clone https://github.com/iizukanao/node-rtsp-rtmp-server
	$ coffee -c .
	$ node server.js
	$ ffmpeg -f avfoundation -i "0" -vcodec libx264 -tune zerolatency -s 320x480 -vf crop=320:480:0:0 -f flv rtmp://0.0.0.0/live/desktop

	# stream on ios device

	$ git clone https://github.com/iMoreApps/ffmpeg-avplayer-for-ios-tvos
	$ open AVPlayerDemo.xcodeproj (change rtmp stream to rtmp://<LOCAL_IP>/live/desktop, build and run)

	<?xml version="1.0" encoding="utf-8"?>
	<!--
	Copyright 2016 Google Inc.

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0