JokingChicken

Colours in terminal

It's a common confusion about terminal colours... Actually we have this:

• plain ascii
• ansi escape codes (16 colour codes with bold/italic and background)
• 256 colour palette (216 colours + 16 ansi + 24 gray) (colors are 24bit)
• 24bit true colour ("888" colours (aka 16 milion))

printf "\x1b[${bg};2;${red};${green};${blue}m\n"

JokingChicken

//check if is production, if it is we won't initiate this
var production = process.env.NODE_ENV === 'production'
if(!production) {
	// we use chokidar for file watching
	var chokidar = require('chokidar')
	var watcher = chokidar.watch('./dist')
	
	watcher.on('ready', function() {
		watcher.on('all', function() {
			console.log("Clearing /dist/ module cache from server");

JokingChicken

// stringify with tabs inserted at each level
JSON.stringify(jsObj, null, "\t");

// stringify with 2 spaces at each level
JSON.stringify(jsObj, null, "  ");

JokingChicken

function b(
  a                  // placeholder
){
  return a           // if the placeholder was passed, return
    ? (              // a random number from 0 to 15
      a ^            // unless b is 8,
      Math.random()  // in which case
      * 16           // a random number from
      >> a/4         // 8 to 11
      ).toString(16) // in hexadecimal

JokingChicken

//Here is how you encode normal text to base64 in Node.js:
var b = new Buffer('JavaScript');
var s = b.toString('base64');
// SmF2YVNjcmlwdA==

//And here is how you decode base64 encoded strings:
var b = new Buffer('SmF2YVNjcmlwdA==', 'base64')
var s = b.toString();
// JavaScript

JokingChicken

<script>
	//find first element with "someAttr" attribute
	document.querySelector('[someAttr]');

	//find all elements with "someAttr" attribute
	document.querySelectorAll('[someAttr]');


	//so this is how you can get a specific element without using id or class
	document.querySelector([attribute="value"])

JokingChicken

/**
 * SHA-256 hash function reference implementation.
 *
 * This is an annotated direct implementation of FIPS 180-4, without any optimisations. 
 * it is intended to aid understanding of the algorithm rather than for production use!!!
 *
 * While it could be used where performance is not critical, I would recommend using the ‘Web
 * Cryptography API’ (developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest) for the browser,
 * or the ‘crypto’ library (nodejs.org/api/crypto.html#crypto_class_hash) in Node.js.
 *

JokingChicken

just look here:
https://developer.mozilla.org/en-US/docs/Learn/Server-side/Express_Nodejs/deployment

JokingChicken

really helpfull:
https://www.digitalocean.com/community/tutorials/how-to-set-up-nginx-load-balancing

JokingChicken

<script>
	// calculate max scroll top position (go back to top once reached)
	var maxScrollPosition = element.scrollHeight - element.clientHeight;
	
	// example
	element.scrollTop = maxScrollPosition;
</script>