mikecao’s gists

mikecao / enable-pip-everywhere.js

Created December 21, 2025 22:18

Removes disablePictureInPicture attribute from all videos (including in iframes) so PiP works

	// ==UserScript==
	// @name Enable Picture-in-Picture Everywhere
	// @namespace http://tampermonkey.net/
	// @version 2.3
	// @description Removes disablePictureInPicture attribute from all videos (including in iframes) so PiP works
	// @match :///*
	// @include *
	// @run-at document-start
	// @grant none
	// ==/UserScript==

mikecao / tradingview-multi-sma.txt

Last active May 28, 2019 02:32

Show multiple SMA values in Tradingview

	//@version=3
	study("Multi SMA", overlay=true)
	sma1 = input(title="SMA 1", type=integer, defval=5)
	sma2 = input(title="SMA 2", type=integer, defval=10)
	sma3 = input(title="SMA 3", type=integer, defval=50)
	sma4 = input(title="SMA 4", type=integer, defval=200)
	SMA1 = sma(close, sma1)
	SMA2 = sma(close, sma2)
	SMA3 = sma(close, sma3)
	SMA4 = sma(close, sma4)

mikecao / electron-menu-item-delay.html

Last active July 15, 2016 03:07

Electron menu item delay

	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Electron - Test</title>
	<style>
	#box {
	width: 100px;
	height: 100px;
	margin: 100px;

mikecao / Chrome 50 rendering performance.html

Created June 21, 2016 07:17

	<!doctype html>
	<html>
	<head>
	<style>
	html, body {
	width: 100%;
	height: 100%;
	overflow: hidden;
	background-color: #ffffff;
	margin: 0;

mikecao / javascript-canvas-sharpen.js

Created December 16, 2015 07:25

Javascript function for sharpening images.

	function sharpen(ctx, w, h, mix) {
	var x, sx, sy, r, g, b, a, dstOff, srcOff, wt, cx, cy, scy, scx,
	weights = [0, -1, 0, -1, 5, -1, 0, -1, 0],
	katet = Math.round(Math.sqrt(weights.length)),
	half = (katet * 0.5) \| 0,
	dstData = ctx.createImageData(w, h),
	dstBuff = dstData.data,
	srcBuff = ctx.getImageData(0, 0, w, h).data,
	y = h;

mikecao / javascript-inheritance

Created October 3, 2014 09:13

Simple Javascript Inheritance for ES 5.1

	/* Simple JavaScript Inheritance for ES 5.1
	* based on http://ejohn.org/blog/simple-javascript-inheritance/
	* (inspired by base2 and Prototype)
	* MIT Licensed.
	*/
	(function() {
	"use strict";

	var fnTest = /\b_super\b/;

mikecao / md5

Created January 30, 2014 06:19

Single function implementation of MD5 in Javascript

	function md5(str) {
	var i, j,
	bytes = [],
	words = [],
	hex = [];

	var Y = [7, 12, 17, 22, 5, 9, 14, 20, 4, 11, 16, 23, 6, 10, 15, 21];

	var Z = [0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
	0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,

mikecao / psmem

Created December 3, 2012 07:12

Linux memory usage in human readable format

ps -eo size,pmem,pid,user,comm | sort -rn | head -10 | awk '{ hr[1024**2]="GB"; hr[1024]="MB"; for (x=1024**3; x>=1024; x/=1024) { if ($1>=x) { printf ("%6.2f %s ", $1/x, hr[x]); break } } } { printf ("%5s%% %-8s %-10s ", $2, $3, $4) } { for ( x=5 ; x<=NF ; x++ ) { printf ("%s ",$x) } print (" ") }'

Mike Cao mikecao