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Let’s Encrypt certificate

For IIS

Create new certificate

certbot certonly --manual -d www.yourwebsite.com -d yourwebsite.com

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Vim cheat sheet

Motions and Operators

Motions

• [operator]aw - current word with trailing space
• [operator]iw - current word
• [operator]ap - current paragraph with trailing space
• [operator]ip - current paragraph
• [operator]l - current letter
• [operator]it - inside the tag
• [operator]0 - move to begin of line

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JavaScript Tricks (not only)

Text

In generally you should convert input string into the array, do the necessary transformation (filter, map, reduce) and join all elements into resulting string.

How to reverse a string

const input = 'reverse me'
const reversed = [...input].reverse().join('')

How to truncate long text

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// based on https://gist.github.com/paulirish/12fb951a8b893a454b32

const $ = document.querySelector.bind(document);
const $$ = document.querySelectorAll.bind(document);

Node.prototype.on = window.on = function (name, fn) {
  this.addEventListener(name, fn);
};

NodeList.prototype.__proto__ = Array.prototype; // eslint-disable-line

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The default prefix is C-b
How to vertical split current pane

<prefix> %

How to horizontal split current pane

<prefix> "

How to resize current pane

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Convert from msg to eml format

sudo apt install libemail-outlook-message-perl 
msgconvert <filename>.msg

Unpack eml

sudo apt install mpack
munpack <filename>.eml

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Took it from https://rekit-portal.herokuapp.com/element/src%252Findex.html/code

(function() {
  var loadingNode = document.getElementById('loading-node');
  var textNode = loadingNode.childNodes[0];
  var barNode = loadingNode.childNodes[1];
  var req = new XMLHttpRequest();

  // report progress events
  req.addEventListener('progress', function(evt) {

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If the package in the node_modules directory causing the type errors when the flow doing its job

• Add <PROJECT_ROOT>/node_modules/BADASS_PACKAGE/*. in [ignore] section of .flowconfig
• Perform flow-typed create-stub BADASS_PACKAGE

If you don't have a flow-typed

• Install it yarn global add flow-typed
• [OPTIONALY] Install definitions for packages flow-typed install

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hcitool scan
# 00:11:22:33:44:55
sudo rfcomm bind /dev/rfcomm0 00:11:22:33:44:55
ls -l /dev/rfcomm0
# crw-rw---- root dialout ... /dev/rfcomm0
sudo usermod -a -G dialout
# You should logout/login

For access in VirtualBox guest machine you should enable serial port, select Host Device and define the path /dev/rfcomm0 in the settings of machine.

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Polyfill for localStorage in Safari private browsing mode

Inspired by https://gist.github.com/juliocesar/926500

function getLocalStorage() {
  try {
    window.localStorage.setItem('__test-localstorage__', '1');
    window.localStorage.removeItem('__test-localstorage__');
    return window.localStorage;
  } catch (error) {
 const localStorage = {