Rene Kriest ReneKriest

Capybara

save_and_open_page

Matchers

have_button(locator)

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

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

Compare & Contrast

HTML, Hyper+JSON, and Data as JSON

OK. Everyone's got LOTS of questions and emotions around how to use hyper. I want to answer them, but first I want to walk you through a comparison exercise.

Take a look at the screenshot below of a typical Facebook post.

Think about the ways you could navigate or interact with this FB post, based only on what you see. Any kind of interaction you take either moves the view to another object, or it alters the data of this object.

Git Cheat Sheet

Commands

Getting Started

git init

or

	/* JigsawImage.java
	* @author: Madan Chaudhary
	* @blog: javaxp.com
	* */

	import java.awt.image.BufferedImage;
	import java.io.File;
	import java.io.IOException;

	import javax.imageio.ImageIO;

	;SMBDIS.ASM - A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY
	;by doppelganger ([email protected])

	;This file is provided for your own use as-is. It will require the character rom data
	;and an iNES file header to get it to work.

	;There are so many people I have to thank for this, that taking all the credit for
	;myself would be an unforgivable act of arrogance. Without their help this would
	;probably not be possible. So I thank all the peeps in the nesdev scene whose insight into
	;the 6502 and the NES helped me learn how it works (you guys know who you are, there's no

	;
	; hello.asm
	;
	; A "Hello, World!" which illustrates an Atari 2600 programming
	; introduction talk (slides at http://slideshare.net/chesterbr).
	;
	; This is free software (see license below). Build it with DASM
	; (http://dasm-dillon.sourceforge.net/), by running:
	;
	; dasm hello.asm -ohello.bin -f3

	"""
	MIT License

	Copyright (c) 2017 Cyrille Rossant

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is

	// ----
	// Sass (v3.4.6)
	// Compass (v1.0.1)
	// ----

	$class_list: icon-device, icon-explore, icon-recommend, icon-recentlywatched;

	%class_styles {
	content: '';
	display: block;