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Viktor Yaffle

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Yaffle / decodeURIComponent.js
Last active April 23, 2020 10:01
decodeURIComponent using TextDecoder
// Implementation of the standard decodeURIComponent using TextDecoder.
// The original JavaScript specification does not separate UTF-8 decoding this way.
// The purpose is to show the possible implementation in JavaScript language.
function hexDigit(code) {
if (code >= '0'.charCodeAt(0) && code <= '9'.charCodeAt(0)) {
return code - '0'.charCodeAt(0);
} else if (code >= 'A'.charCodeAt(0) && code <= 'F'.charCodeAt(0)) {
return code + (10 - 'A'.charCodeAt(0));
} else if (code >= 'a'.charCodeAt(0) && code <= 'f'.charCodeAt(0)) {
@Yaffle
Yaffle / gist:40c58eb0c8075949313b3348bbb5f2b0
Last active August 18, 2018 11:33
/*jslint strict:global*/
/*global self, fetch, caches, console, Promise, Request*/
"use strict";
var CACHE_NAME_PREFIX = "ru~";
var CACHE_NAME = "ru~20180818T075107Z";
var URLS_TO_CACHE = "./;js.js?20180818T075107Z;css.css?20180818T075107";
self.addEventListener("install", function (event) {
@Yaffle
Yaffle / gist:af5498d9e4fa5674fe5f4164a70fa506
Created March 28, 2018 14:26
function replaceSimpleDigit(code) {
if (code >= 0x0660 && code <= 0x669) {
return {code: code - 0x0660 + 48, name: "arab"};
}
if (code >= 0x06F0 && code <= 0x6f9) {
return {code: code - 0x06F0 + 48, name: "arabext"};
}
if (code >= 0x0966 && code <= 0x96f) {
return {code: code - 0x0966 + 48, name: "deva"};
}
@Yaffle
Yaffle / index.html
Last active May 10, 2017 04:28
isSafeInteger #jsbench #jsperf (http://jsbench.github.io/#ba6a3ecbe65fe3b16e9fb60ff6816723) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>isSafeInteger #jsbench #jsperf</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="./suite.js"></script>
</head>
<body>
<h1>Open the console to view the results</h1>
@Yaffle
Yaffle / index.html
Last active January 20, 2017 15:12
Math.cbrt #jsbench #jsperf (http://jsbench.github.io/#7a271ffbf88a5d4b0f5b42b13b89144e) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Math.cbrt #jsbench #jsperf</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="./suite.js"></script>
</head>
<body>
<h1>Open the console to view the results</h1>
@Yaffle
Yaffle / index.html
Last active December 21, 2016 15:00
Math.trunc vs Math.floor #jsbench #jsperf (http://jsbench.github.io/#da9d5dbe6f00bc69c5c1328b6a3f6cee) #jsbench #jsperf
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Math.trunc vs Math.floor #jsbench #jsperf</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="./suite.js"></script>
</head>
<body>
<h1>Open the console to view the results</h1>
@Yaffle
Yaffle / Math.fma.js
Last active January 12, 2025 12:07
Math.fma - fused multiply–add (FMA) or fused multiply–accumulate (FMAC) in JavaScript
// a * b + c
// Math.fma - fused multiply–add (FMA) or fused multiply–accumulate (FMAC) in JavaScript
// For implementation details, see "The Handbook of Applied Cryptography"
// http://www.cacr.math.uwaterloo.ca/hac/about/chap14.pdf
// and
// https://github.com/JuliaLang/openlibm/blob/master/src/s_fma.c
//!? BUGGY
(function () {
@Yaffle
Yaffle / sort.js
Last active September 8, 2018 06:09
merge sort
// `Array#sort` implementation using the merge sort
// Notes:
// 1) calls comparator for undefined values, holes, values from the prototype chain;
// 2*) replaces holes with undefined values or values from the prototype chain;
// 3*) does not use `ToObject(this)`, `ToLength(this.length)`;
// 4*) does not throw errors for non-undefined non-function `comparefn`.
// 5*) uses `Math`, `Math.floor`, `String`, `Array`.
// 6*) calls setters of `Array.prototype` during internal buffer initialization.
// * This behaviour is inconsistent across browsers even for built-in `Array#sort`.
@Yaffle
Yaffle / canvas-drawArrow.js
Created August 27, 2015 11:06
var drawArrow = function (context, x1, y1, x2, y2) {
context.lineWidth = 1.25;
context.beginPath();
context.moveTo(x1, y1);
context.lineTo(x2, y2);
context.stroke();
var a = Math.PI / 8;
var h = 12;
var sa = Math.sin(a);
@Yaffle
Yaffle / gist:3c0a9a6d1fb535e24b21
Last active August 29, 2015 14:19
// (Math.exp(704.6589) / Math.expm1(704.6589) - 1) / Number.EPSILON
var isExpOK = Math.exp(704.6589) >= 1.0702171200481775e+306 * (1 - 16 * Math.pow(2, -52)) &&
Math.exp(704.6589) <= 1.0702171200481775e+306 * (1 + 16 * Math.pow(2, -52));
// (Math.exp(704.6589) / Math.expm1(704.6589) - 1) / Number.EPSILON
var isExpOK = Math.exp(704.6589) >= 1.0702171200481775e+306 * (1 - 16 * Math.pow(2, -52)) &&
Math.exp(704.6589) <= 1.0702171200481775e+306 * (1 + 16 * Math.pow(2, -52));
Math.exp = function (x) {
var hi = 0.6931471805598903;
var lo = 5.497923018708371e-14;
var k = Math.floor(x / hi + 0.5);