Jon Cordeiro jcordeiro

HTML5 Canvas Zoom and Pan Image

Pure JavaScript Zoom and Pan, taken from http://phrogz.net/tmp/canvas_zoom_to_cursor.html

A Pen by TechSlides on CodePen.

License.

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?

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)

	<!DOCTYPE html>
	<html>
	<head><title>Fizzlefade</title></head>

	<body>

	<canvas id="framebuffer" width="320" height="200"></canvas>

	<script type="text/javascript">
	/* Fizzlefade using a Feistel network.

	// Faster solution for:
	// http://www.boyter.org/2017/03/golang-solution-faster-equivalent-java-solution/
	// With threading.
	// g++ -std=c++11 -Wall -Wextra -O3 -pthread

	// On my computer (i5-6600K 3.50 GHz 4 cores), takes about ~160 ms after the CPU
	// has warmed up, or ~80 ms if the CPU is cold (due to Turbo Boost).

	// How it works: Start by generating a list of losing states -- states where the
	// game can end in one turn. Generate a new list of states by running the game

	CPU 6502
	- http://www.6502.org/
	- http://skilldrick.github.io/easy6502/
	- http://nesdev.com/6502guid.txt
	- https://en.wikibooks.org/wiki/6502_Assembly

	6502 C Compiler
	- http://cc65.github.io/cc65/

	NES Programming

	1.01 - Added some new licensees, fixed some
	descriptions.
	v1.00 - Initial release.
	_______________

	This information was taken and compiled from Martin Korth's
	NO$GMB emulator. Best viewed in DOS EDIT.

	Every Gameboy ROM header starts off at the HEX offset 0134.

	Nitty Gritty Gameboy Cycle Timing
	---------------------------------


	A document about the down and dirty timing of the Gameboy's video hardware.

	Written by: Kevin Horton
	Version: 0.01 (preliminary)

	My findings here are based on the original DMG, Super Gameboy, and GB

	// Includes functions for exporting active sheet or all sheets as JSON object (also Python object syntax compatible).
	// Tweak the makePrettyJSON_ function to customize what kind of JSON to export.

	var FORMAT_ONELINE = 'One-line';
	var FORMAT_MULTILINE = 'Multi-line';
	var FORMAT_PRETTY = 'Pretty';

	var LANGUAGE_JS = 'JavaScript';
	var LANGUAGE_PYTHON = 'Python';

	#301 Redirects for .htaccess

	#Redirect a single page:
	Redirect 301 /pagename.php http://www.domain.com/pagename.html

	#Redirect an entire site:
	Redirect 301 / http://www.domain.com/

	#Redirect an entire site to a sub folder
	Redirect 301 / http://www.domain.com/subfolder/