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Awesome Courses

Introduction

There is a lot of ~~hidden~~ treasure lying within university pages scattered across the internet. This list is an attempt to bring to light those awesome courses which make their high-quality material i.e. assignments, lectures, notes, readings & examinations available online for free.

System Design Cheatsheet

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

Basic Steps

Clarify and agree on the scope of the system

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?

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	Source: https://g751jy.wordpress.com/about/parrot-zik-bluetooth-headset/
	https://bbs.archlinux.org/viewtopic.php?id=194006
	Cached: http://webcache.googleusercontent.com/search?q=cache:4stTobIXSD0J:https://g751jy.wordpress.com/about/parrot-zik-bluetooth-headset/+&cd=3&hl=en&ct=clnk&gl=us

	Bug and possible solution: actually I found a bug in that make the headset unusable, it seems that the pulse audio module: module-bluetooth-discover works only if started after the X11 session is up. So I have a workaround.

	Edit the file:

	/etc/pulse/default.pa


	// Swift version of https://developer.apple.com/library/mac/technotes/tn2084/_index.html

	@IBAction func testButtonPushed(sender: AnyObject) {

	let URL = NSBundle.mainBundle().URLForResource("SendFinderMessage", withExtension: "scpt")!

	var errors: NSDictionary?
	let script = NSAppleScript(contentsOfURL: URL, error: &errors)!

	Source: http://datahugger.org/datascience/setting-up-hadoop-v2-with-spark-v1-on-osx-using-homebrew/

	This post builds on the previous setup Hadoop (v1) guide, to explain how to setup a single node Hadoop (v2) cluster with Spark (v1) on OSX (10.9.5).

	Apache Hadoop is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. Rather than rely on hardware to deliver high-availability, the library itself is designed to detect and handle failures at the application layer, so delivering a highly-available service on top of a cluster of computers, each of which may be prone to failures. The Apache Hadoop framework is composed of the following core modules:

	HDFS (Distributed File System): a distributed file-system that stores data on commodity machines, providing very high aggregate bandwidth across the cluster.
	YARN (Yet A

	//
	// MSButtonTextTopCell.h
	// <Project>
	//
	// Created by Martin Sandström on 2015-09-23.
	// Copyright (c) 2015 Martin Sandström. All rights reserved.
	//

	#import <Cocoa/Cocoa.h>

	#!/bin/bash

	export Register=https://register.example.com
	export cLink="/v2/_catalog?n=10"
	export cFile=docker.register.catalog
	export tFile=docker.register.tags
	export wgetC="wget -O- -q -S "
	# Usage with user/password
	# export wgetC="wget -O- -q -S --user=ondra --password=heslo "

	// How to build: "CC=clang go build"

	package main

	import (
	"fmt"
	"net/url"
	"strconv"
	"unsafe"
	)