husa’s gists

husa / inverse.js

Created May 26, 2013 10:58

finding the inverse matrix in JavaScript (port from C++)

	function inverse(_A) {
	var temp,
	N = _A.length,
	E = [];

	for (var i = 0; i < N; i++)
	E[i] = [];

	for (i = 0; i < N; i++)
	for (var j = 0; j < N; j++) {

husa / declaration.js

Last active December 18, 2015 02:38

how to declare a global variable or export it as CJS or AMD module if posible. 'this' must refer to global object or you can put this code into global scope

	// myModule - is our global we want to export
	var root = this;

	if (typeof(exports) !== 'undefined') {
	if (typeof(module) !== 'undefined' && module.exports) {
	exports = module.exports = myModule;
	}
	exports.myModule = myModule;
	} else {
	if (typeof define === 'function' && define.amd) {

husa / node_build.json

Last active December 18, 2015 04:10

Node js Build for Sublime Text 2 To import it to Sublime Text: Tools -> Build System -> New Build System, and paste this code there To use: Tools -> Build System, and select your newly created build

	// new build
	{
	"cmd": ["node", "$file"],
	"file_regex": "^[ ]File \"(...?)\", line ([0-9]*)",
	"selector": "source.js"
	}
	//key bindings for build
	[
	{ "keys": ["ctrl+b"], "command": "build" },
	{ "keys": ["ctrl++alt+b"], "command": "exec", "args": {"kill": true} }

husa / singleton.js

Created July 24, 2013 20:35

Singleton pattern with instance in a closure

	function Singleton() {
	var instance,
	that = this \|\| {};

	Singleton = function() {
	return instance;
	}

	Singleton.prototype = that;

husa / node-webkit_build.json

Created September 9, 2013 14:18

Node-webkit build for Sublime Text Tools > Build > New Build System

	// first don't forget to add node-webkit directory to PATH
	{
	"cmd": ["nw", "$file_path"],
	"file_regex": "^[ ]File \"(...?)\", line ([0-9]*)",
	"selector": "text.html"
	}

husa / events.js

Created September 17, 2013 12:41

reusable custom events

	var Events = function() {
	var events = {};
	return {
	on : function(event, callback) {
	events[event] = events[event] \|\| [];
	events[event].push(callback);
	return this;
	},

	off : function(event, callback) {

husa / pointInPolygon.js

Created January 20, 2014 12:41

Point In Polygon Determine if some point is inside a polygon

	/**
	* Determine if point (x, y) is inside the polygon
	* @param {Integer} - x coord
	* @param {Integer} - y coord
	* @param {Array} - Array of vertices - {x:, y:} objects
	* @returns {Boolean} whether or not given point is inside the polygon
	*/
	function pointInPolygon(x, y, vertices) {
	var v = vertices, // less typing
	vx = v.map(function(vertice) { return vertice.x; }),

husa / type.js

Last active August 29, 2015 13:56

get proper type of any value

	var toString = Object.prototype.toString,
	regexp = /\[object (.*?)\]/;

	function type(o) {
	var match = toString.call(o).match(regexp);

	return match[1].toLowerCase();
	}

husa / getURLParams.js

Last active August 29, 2015 14:07

get URL params from string

	function getURLParams(url, includeEmptyValues) {
	return decodeURIComponent(url \|\| window.location.search.slice(1)).
	replace(/.*\?/, '').split('&').
	reduce((params, value) => {
	value = value.split('=')
	if (includeEmptyValues \|\| typeof value[1] !== 'undefined')
	params[value[0]] = value[1];
	return params;
	}, {});
	}

husa / decorator.coffee

Last active August 29, 2015 14:10

Simple Decorator

	class Decorator
	constructor: ({pre, post}) ->
	return (func) ->
	(args...) ->
	args = pre?(args...) or args
	ret = func(args...)
	post?(ret) or ret


	currency = new Decorator({post : (a) -> '$' + a})

Yuriy husa