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@banksean
banksean / perlin-noise-classical.js
Created February 15, 2010 10:00
two Perlin noise generators in javascript. The simplex version is about 10% faster (in Chrome at least, haven't tried other browsers)
// Ported from Stefan Gustavson's java implementation
// http://staffwww.itn.liu.se/~stegu/simplexnoise/simplexnoise.pdf
// Read Stefan's excellent paper for details on how this code works.
//
// Sean McCullough banksean@gmail.com
/**
* You can pass in a random number generator object if you like.
* It is assumed to have a random() method.
*/
@tbtlr
tbtlr / get_barcode_from_image.js
Created June 1, 2010 19:33
Barcode recognition with JavaScript - Demo: http://bit.ly/djvUoy
/*
* Copyright (c) 2010 Tobias Schneider
* This script is freely distributable under the terms of the MIT license.
*/
(function(){
var UPC_SET = {
"3211": '0',
"2221": '1',
"2122": '2',
@jrburke
jrburke / apiexamples.js
Created April 7, 2011 05:50
Description of browser-friendly module APIs: AMD and Loader Plugins
//*******************************************
// Level 1, basic API, minimum support
//*******************************************
/*
Modules IDs are strings that follow CommonJS
module names.
*/
//To load code at the top level JS file,
//or inside a module to dynamically fetch
@maccesch
maccesch / lagrange.js
Created May 27, 2011 12:27
Lagrange Polynomial Interpolation. Example: http://jsfiddle.net/maccesch/jgU3Y/
/**
* At least two points are needed to interpolate something.
* @class Lagrange polynomial interpolation.
* The computed interpolation polynomial will be reffered to as L(x).
* @example
* var l = new Lagrange(0, 0, 1, 1);
* var index = l.addPoint(0.5, 0.8);
* console.log(l.valueOf(0.1));
*
* l.changePoint(index, 0.5, 0.1);
@Yaffle
Yaffle / URLUtils.js
Last active September 5, 2022 02:19
parse URL + absolutize URL in javascript (URLUtils shim - http://url.spec.whatwg.org/#url)
/*jslint regexp: true, maxerr: 50, indent: 2 */
(function (global) {
"use strict";
function URLUtils(url, baseURL) {
var m = String(url).replace(/^\s+|\s+$/g, "").match(/^([^:\/?#]+:)?(?:\/\/(?:([^:@\/?#]*)(?::([^:@\/?#]*))?@)?(([^:\/?#]*)(?::(\d*))?))?([^?#]*)(\?[^#]*)?(#[\s\S]*)?/);
if (!m) {
throw new RangeError();
}
@jrburke
jrburke / gist:1262861
Created October 4, 2011 21:26
Universal (AMD/Node/plain browser) module
/**
* First, better, "set exports/return" option
*/
(function (define) {
//The 'id' is optional, but recommended if this is
//a popular web library that is used mostly in
//non-AMD/Node environments. However, if want
//to make an anonymous module, remove the 'id'
//below, and remove the id use in the define shim.
define('id', function (require) {
@jrburke
jrburke / a.js
Created November 23, 2011 05:25
Common module boilerplate that sets export value
// Define a module "a" that depends another module called "b". If
// that other module also uses this type of boilerplate, then
// in the browser, it will create a global .b that is used below.
// If you do not want to support the browser global path, then you
// can remove the `root` use and the passing `this` as the first arg to
// the top function.
(function(root, factory) {
if (typeof exports === 'object') {
@paulirish
paulirish / rAF.js
Last active July 19, 2024 19:50
requestAnimationFrame polyfill
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
// MIT license
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
@martinsik
martinsik / chat-frontend.js
Last active December 19, 2023 10:23
Node.js chat frontend and server
$(function () {
"use strict";
// for better performance - to avoid searching in DOM
var content = $('#content');
var input = $('#input');
var status = $('#status');
// my color assigned by the server
var myColor = false;
@tbtlr
tbtlr / index.html
Created May 14, 2012 12:57
How to implement synchronous(ish) Web Worker tasks in Firefox, using JS1.7 Generators.
<!doctype html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<script type="application/javascript;version=1.7">
var worker = new Worker('worker.js');
var g;