Elías Alonso werelax

Epub Tutorial

Pre-requisite

Creating eBooks in the EPUB format

Listing 1. Directory and file layout for a simple EPUB archive (EPUB 2 file structure )

Clojure Destructuring Tutorial and Cheat Sheet

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

I like Pages.app, but don't want to deal with constantly copying and pasting code around.

Here is how I do syntax highlighting in Pages.app by pressing a key command. It's based off of this post on stack exchange.

install pygments

sudo easy_install Pygments

install github syntax

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

	# Map a local port to a target port through the remote server.

	# In the example: localhost:9000 is tunneled to imgur.com:80 through example.com
	# local:9000 -> exaple.com -> target:80
	# you could browse to http://localhost:9000/ and browse imgur.com
	# (won't see anything, because imgur has changed their stack, but the tunnel works)

	ssh -L 9000:imgur.com:80 [email protected]

	# Useful for: use a server as a proxy, secure a connection (ssh encrypts everything),

	%.hex: %.asm
	avra -fI $<
	rm .eep.hex .obj *.cof

	all: $(patsubst %.asm,%.hex,$(wildcard *.asm))

	upload: ${program}.hex
	avrdude -c arduino -p m328p -P /dev/arduino-uno -b 115200 -U flash:w:$<

	monitor:

	var ctx = null, usingWebAudio = true;

	try {
	if (typeof AudioContext !== 'undefined') {
	ctx = new AudioContext();
	} else if (typeof webkitAudioContext !== 'undefined') {
	ctx = new webkitAudioContext();
	} else {
	usingWebAudio = false;
	}

	taglib https://github.com/takikawa/taglib-racket/blob/master/taglib/taglib.rkt
	libsdl http://planet.racket-lang.org/package-source/pb82/sdl4racket.plt/1/1/src/
	allegro https://github.com/kazzmir/racket-allegro-5/blob/master/allegro.rkt
	libgit2 https://github.com/jarnaldich/racket-git/blob/master/libgit2.rkt
	opencl http://planet.racket-lang.org/package-source/jaymccarthy/opencl.plt/3/4/c/
	openmpi http://planet.racket-lang.org/package-source/jaymccarthy/openmpi.plt/1/1/ffi/
	zeroqm http://planet.racket-lang.org/package-source/jaymccarthy/zeromq.plt/2/1/zmq.rkt
	svn http://planet.racket-lang.org/package-source/jaymccarthy/svn-prop.plt/1/0/main.ss
	chipmunk http://planet.racket-lang.org/package-source/jaymccarthy/chipmunk.plt/1/0/chipmunk-ffi.ss
	opencv https://github.com/oetr/racket-opencv

	; Short guide to TCP/IP Client/Server programming in Common Lisp using usockets
	;
	; The main reason for this guide is because there are very few examples that
	; explain how to get started with socket programming with Common Lisp that I
	; could understand. After spending a day trying, I finally came up with a small
	; bit of code that makes it easy to understand the basics. I've written this
	; primarily for myself, but should help others get started as well.

	; As usual, we will use quicklisp to load usocket.

	sf2-ddd
	├── app
	├── bin
	├── build
	├── lib
	├── src
	│ └── __VendorPrefix
	│ ├── Application
	│ │ └── __DomainNameBundle
	│ │ ├── Command