vukicevic’s gists

vukicevic / CalendarWidgetGenerator

Created March 15, 2015 23:06

Calendar widget dates generator using ES6

	function *calendar (month, year) {

	var c = new Date(year, month, 0).getDate();
	var l = new Date(year, month - 1, 0).getDate();
	var o = new Date(year, month - 1, 1).getDay();

	var p = o > 0 ? 1 - o : -6;
	var m = 42 + p;

	while (p < m)

vukicevic / readable

Created October 21, 2014 16:03

Human-readable file size from bytes.

	function readable($size, $unit = array('B', 'KB', 'MB', 'GB', 'TB', 'PB')) {
	return ($size > 1024) ? readable($size/1024, array_slice($unit, 1)) : round($size, 2) . ' ' . array_shift($unit);
	}

vukicevic / b64StringToByteArray

Last active August 29, 2015 14:00

Base64 encode/eecode byte array

	/*
	* Input: Base64 encoded string
	* Output: Raw byte-array
	*/
	function decodeStringToArray(s) {
	return Array.prototype.map.call(atob(s), function(c) { return c.charCodeAt() });
	}

	/*
	* Input: Raw byte-array

vukicevic / Latin to Cyrillic Bookmarklet

Last active August 29, 2015 13:58

Latin script to Serbian cyrillic converter bookmarklet, preserves DOM elements.

	(function () {
	var s, r, t;

	function replace(parent) {
	var n, w = document.createTreeWalker(parent, NodeFilter.SHOW_TEXT, null, false),
	c = ['љ','Љ','њ','Њ','џ','Џ','ч','Ч','ћ','Ћ','ж','Ж','ш','Ш','ђ','Ђ','з','З','е','Е','р','Р','т','Т','у','У','и','И','о','О','п','П','а','А','с','С','д','Д','ф','Ф','г','Г','х','Х','ј','Ј','к','К','л','Л','ц','Ц','в','В','б','Б','н','Н','м','М'],
	l = ['lj','Lj','nj','Nj','dž','Dž','č','Č','ć','Ć','ž','Ž','š','Š','đ','Đ','z','Z','e','E','r','R','t','T','u','U','i','I','o','O','p','P','a','A','s','S','d','D','f','F','g','G','h','H','j','J','k','K','l','L','c','C','v','V','b','B','n','N','m','M'];

	while (n = w.nextNode())
	c.forEach(function(v, i) { n.nodeValue = n.nodeValue.split(l[i]).join(v) });

vukicevic / Byte length

Created December 31, 2013 13:24

Calculate length, in bytes, of input number. JavaScript.

	function byteLength(l) {
	return Math.floor(Math.log(l)/Math.log(256))+1;
	}

vukicevic / BER Length

Last active January 1, 2016 20:19

ASN.1 BER length generator. Pass a length l to the function, outputs an array with a BER format length. JavaScript.

	function berLength(l) {
	var ll, bl;

	if (l < 128) {
	bl = [l];
	} else {
	ll = Math.floor(Math.log(l)/Math.log(256))+1;
	bl = [128 + ll];

	while (ll-- > 0)

vukicevic / Simple Javascript Templates

Last active January 1, 2016 07:39

Simple javascript template function. Pre-prepared templates are created on the page, and then parsed/compiled. Variables are set with {{var}} and repeating sections with {{#sec}} ... {{/sec}}. Content is passed as JSON.

	function TemplateEngine(templ) {
	if (typeof templ != "undefined")
	templ = document.getElementById(templ).innerHTML.replace(/\n\|\r/g, "").replace(/>\s+</g, "><").trim();

	return function compile(data, template) {
	var match, tpart, i, template = template \|\| templ;

	while (match = /\{\{#([a-zA-Z]+)\}\}(.+)\{\{\/\1\}\}/g.exec(template)) {
	for (tpart = '', i = 0; i < data[match[1]].length; i++)
	tpart += compile(data[match[1]][i], match[2]);

vukicevic / Draw Bitmap From Int Array

Last active October 31, 2023 08:50

Generate a monochrome bitmap image in JavaScript using a byte-array. The image is generated such that every bit in the array is shown as either a black (1) or white (0) pixel.

	/**
	* depth: 1 - monochrome
	* 4 - 4-bit grayscale
	* 8 - 8-bit grayscale
	* 16 - 16-bit colour
	* 32 - 32-bit colour
	**/
	function drawArray(arr, depth) {
	var offset, height, data, image;

vukicevic / String to Byte Array conversion

Last active December 26, 2015 18:29

Convert UTF-8 string to and from integer byte-array.

	function arrayToString(input) {
	return decodeURIComponent(
	input.map(function(v) {
	return '%'+v.toString(16);
	})
	.join('')
	);
	};

	function stringToArray(input) {

Nenad Vukicevic vukicevic