kumarasinghe

function executeOnPageSpace(code){

    // create a script tag
    var script = document.createElement('script')
    script.id = 'tmpScript'
    // place the code inside the script. later replace it with execution result.
    script.textContent = 
    'document.getElementById("tmpScript").textContent = JSON.stringify(' + code + ')'
    // attach the script to page
    document.documentElement.appendChild(script)

kumarasinghe

/* 
Invalid data will cause the server to silently reject your POST request.
Analyze the POST request on form submission via Chrome Dev tools.
*/

(async () => {

    // create a form data object
    let form = new FormData()

kumarasinghe

#!/usr/bin/perl -l
# wvdiald.pl - Auto connect USB modems on Linux
# Author: naveenk <dndkumarasnghe@gmail.com>
# License: MIT
# Make sure you have wvdial and usb-modeswitch installed. Fill the connection parameters below.
# Run this as root. Add "perl /path/to/wvdiald.pl" to /etc/rc.local to make this a service

######################### CHANGE AS NEEDED ################################

# connection parameters

kumarasinghe

#!/usr/bin/perl

my $path = "/folder/to/monitor";
my $mailCMD = "/usr/bin/msmtp";
my $mailTo = 'you@gmail.com';

chdir $path;
my @files = `du -hs * | cut -f2`;
my @actualSizes = `du -hs * | cut -f1`;
my @apparentSizes =  `du -hs --apparent-size * | cut -f1`;

kumarasinghe

/*
reads a file upwards from the given 'startPosition' to the specified length and
returns an object with the lines and the final position read
if 'startPosition' is not specified it will be the very bottom of the file
*/
async function readFileBottomUp(filename, length, startPosition) {

    return new Promise((resolve, reject) => {

        // file does not exist

kumarasinghe

const CACHE_VERSION = 'cache-v1' // increment this when you update the web site
const filesToCache = [
    "./index.html",
    "./path/an/image.png",
    // add more static assets to cache
]


self.addEventListener(
    'install',

kumarasinghe

// go to the course page, press F12 and run this code in Java Script console.
// once done you get a list of video download links. Right click and save them or,
// download all at once with a tool of your choice (e.g. Chrome Simple Mass Downloader)
(async () => {

    let SELECTOR_CHAPTER_EXPANDERS = '.classroom-toc-chapter__toggle'
    let SELECTOR_LESSONS = '[data-control-name="toc_item"]'
    let VIDEO_LOAD_WAIT = 3000

    // expand chapters on sidebar except the first

kumarasinghe

// CORS policies apply
async function download(url, filename){
	let res = await fetch(url)
	let blob = await res.blob()
	let a = document.createElement("a");
  	a.href = URL.createObjectURL(blob)
  	a.download = filename;
  	a.click();
}

kumarasinghe

  getMACAddress() {
    let vmMACPrefixes = [
      "00:50:56",
      "00:0C:29",
      "00:05:69",
      "00:1C:14",
      "0A:00:27",
      "00:03:FF",
      "00:1C:42",
      "00:0F:4B",

kumarasinghe

<style>
  .switch input{
    display: none;
  }
  .switch label{
    background-color: grey;
  }
  .switch input:checked + label{
    background-color: red;
  }