Stone Zhang xudongzhang

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

:q        close
:w        write/saves
:wa[!]    write/save all windows [force]
:wq       write/save and close

	# Thanks to this post:
	# http://blog.ikato.com/post/15675823000/how-to-install-consolas-font-on-mac-os-x

	$ brew install cabextract
	$ cd ~/Downloads
	$ mkdir consolas
	$ cd consolas
	$ curl -O http://download.microsoft.com/download/f/5/a/f5a3df76-d856-4a61-a6bd-722f52a5be26/PowerPointViewer.exe
	$ cabextract PowerPointViewer.exe
	$ cabextract ppviewer.cab

	package practice;

	import java.util.LinkedList;
	import java.util.List;
	import static java.util.Arrays.asList;

	public class NestList {

	public static List<Integer> flatten(List<?> list) {
	List<Integer> ret = new LinkedList<Integer>();