Harvey Xu PoemCode

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	# Hello, and welcome to makefile basics.
	#
	# You will learn why `make` is so great, and why, despite its "weird" syntax,
	# it is actually a highly expressive, efficient, and powerful way to build
	# programs.
	#
	# Once you're done here, go to
	# http://www.gnu.org/software/make/manual/make.html
	# to learn SOOOO much more.

	Enable TRIM on non-Apple SSDs in OS X 10.8.2 Mountain Lion.

	WARNING: This is ONLY tested on 10.8.2 (IOAHCIBlockStorage version 2.3.1), and NOT earlier or later versions.

	Check /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/version.plist

	Technical note: The driver changed in 10.8.2 and similar perl commands that worked in earlier OS X versions did not work for me once I updated to 10.8.2.

	Run the following commands in Terminal…

	;;; cedet-1.1-startup.el --- Working configuration for CEDET 1.1 & below

	;; Copyright (C) Alex Ott
	;;
	;; Author: Alex Ott <[email protected]>
	;; Keywords: CEDET 1.1,
	;; Requirements: CEDET 1.1 or below

	(load-file "~/tmp/cedet-1.1/common/cedet.el")
	(require 'semantic-decorate-include)

	import android.annotation.TargetApi;
	import android.content.Context;
	import android.graphics.Matrix;
	import android.graphics.drawable.Drawable;
	import android.os.Build;
	import android.util.AttributeSet;
	import android.widget.ImageView;

	/**
	* Created by chris on 7/27/16.