David Aurelio davidaurelio

💭

I may be slow to respond.

davidaurelio / jilorg_fix_filenames.py

Created September 1, 2010 08:29

	#!/usr/bin/env python
	"""
	Fixes file names for downloads from jil.org.

	jil.org delivers downloaded files with file names in e-mail header format. The
	fix_filename function from this module can decode such file names.

	When this module is executed as main program, all file names passed as program
	arguments are renamed properly:

davidaurelio / create.js

Created February 22, 2011 14:48

Constructor-less inheritance for ECMAScript 5

	var BaseObject = {
	create: function create() {
	var instance = Object.create(this);
	instance._construct.apply(instance, arguments);
	return instance;
	},

	extend: function extend(properties, propertyDescriptors) {
	propertyDescriptors = propertyDescriptors \|\| {};

davidaurelio / hastouch.html

Created September 6, 2011 17:10

Checking for touch support

	<!doctype html>
	<title>has touch?</title>
	<h1>Has this device touch? </h1>
	<script>
	var isTouch = (function(){
	try{
	var event = document.createEvent("TouchEvent"); // Should throw an error if not supported
	return !!event.initTouchEvent; // Check for existance of initialization method
	}catch(error){
	return false;

davidaurelio / EventEmitter.js

Created March 22, 2012 09:54

Constructable mixins in JavaScript

	/*
	EventEmitter is usable as constructor and as mixin.
	*/
	function EventEmitter() {}

	// this does the trick
	EventEmitter.prototype = EventEmitter;

	EventEmitter.addListener = function(type, listener) {
	this.listeners(type, true).push(listener);

davidaurelio / Usage

Created April 2, 2012 12:12

Angle type

	var a = new Angle().radians(Math.PI * 3 / 4),
	b = new Angle().degrees(135);

	var c = new Angle(a + b);

	Math.sin(a);
	Math.cos(b);

	a.add(new Angle().degrees(30));
	b.add(Math.PI);

davidaurelio / point.js

Created July 18, 2012 08:40

A toString()’able point that allows addition

	function Point(x, y) {
	if (arguments.length === 1 && typeof x === 'string') {
	return x.slice(1, -1)
	.split('}{')
	.map(function(tuple) {
	return tuple.split(',', 2).map(parseFloat)
	})
	.reduce(function(point, coords) {
	point.x += coords[0];
	point.y += coords[1];

davidaurelio / point.js

Created July 18, 2012 10:11

A Point class that supports addition and subtraction of instances. Precision is 16bit fixed point per coordinate.

	/*
	A point constructor that creates objects supporting addition and subtraction.

	The "trick" is to use 32bit integers and stuff two fixed 16bit fixed point
	numbers into them that represent the coordinates of the point.

	This approach has problems with overflow. E.g. when adding two points (0, 2)
	and (0, -2), the addition will cause the y values to overflow into the 17th
	bit, which is part of the x-value. When subtracting two points, e.g.
	(.00390625, 0) - (0, -128)

davidaurelio / naive-super.js

Created September 7, 2012 09:54

Naive implementation of super in JS

	Object.defineProperty(Object.prototype, 'super', {
	get: function() { return Object.getPrototypeOf(this); }
	});

	function Foo() {}
	Foo.prototype.reset = function() {
	this.fooProp = 'reset';
	console.log('Foo#reset()');
	}

davidaurelio / super-proxy.js

Created September 7, 2012 10:13

`super` using `Proxy.create`

	Object.defineProperty(Object.prototype, 'super', {
	value: function(Constructor) {
	var context = this;
	var superProto = Object.getPrototypeOf(Constructor.prototype);
	return Proxy.create({
	get: function(_, name) {
	return function() {
	return superProto[name].apply(context, arguments);
	}
	}

davidaurelio / lazy-property.js

Created December 3, 2012 08:54

Lazy properties for ES5

	function lazyProperty(object, name, create) {
	Object.defineProperty(object, name, {
	configurable: true, // or false if defined on prototype objects
	enumerable: false,
	get: function() {
	return this[name] = create(this);
	},
	set: function(value) {
	Object.defineProperty(this, name, {
	configurable: true,