john-doherty

(function () {

    'use strict';

    /**
     * wraps a promise in a timeout, allowing the promise to reject if not resolve with a specific period of time
     * @param {integer} ms - milliseconds to wait before rejecting promise if not resolved
     * @param {Promise} promise to monitor
     * @example
     *  promiseTimeout(1000, fetch('https://courseof.life/johndoherty.json'))

john-doherty

Digital Ocean Droplet

Digital Ocean offers a pre-installed Dokku image. You can run this image on any sized droplet, although larger droplets will allow you to run larger applications.

When choosing your Droplet configuration please disable IPv6. There are known issues with IPv6 on Digital Ocean and Docker, and many have been reported to the Dokku issue tracker. If you would like to run Dokku on an IPv6 Digital Ocean Droplet, please consult this guide.

Dokku setup using a Mac

1. Login to your Digital Ocean account

john-doherty

function trimSvgWhitespace() {

  // get all SVG objects in the DOM
  var svgs = document.getElementsByTagName("svg");

  // go through each one and add a viewbox that ensures all children are visible
  for (var i=0, l=svgs.length; i<l; i++) {

    var svg = svgs[i],
        box = svg.getBBox(), // <- get the visual boundary required to view all children

john-doherty

# Disable DPMS.
xset s off         # don't activate screensaver
xset -dpms         # disable DPMS (Energy Star) features.
xset s noblank     # don't blank the video device

# Create a RAM disk to use as a FIFO for streaming.
if [ ! -d /iwk ]; then
    mkdir /tmp/rdisk
fi
mount -t tmpfs -o size=25M tmsfs /tmp/rdisk

john-doherty

/**
 * GET contents of a URL
 * @access private
 * @param {string} url - url to get
 * @param {function} error - function to call if there is an error
 * @param {function} callback - function to call if success
 * @returns {void}
 */
function httpGet(url, error, callback) {

john-doherty

/**
 * Get all CSS style blocks matching a CSS selector from stylesheets
 * @param {string} className - class name to match
 * @param {boolean} startingWith - if true matches all items starting with selector, default = false (exact match only)
 * @example getStylesBySelector('pure-form .pure-form-html ')
 * @returns {object} key/value object containing matching styles otherwise null
 */
function getStylesBySelector(className, startingWith) {

john-doherty

/**
 * Removes empty values, trims whitespace and removes duplicate from a comma separated string in JavaScript
 * @example
 *  cleanCsvString('one, ,, , two,two,two, three'); // returns 'one,two,three'
 *  cleanCsvString('one, ,, , two,two,two, three', false); // returns 'one,two,two,two,three'
 * @param {string} str - string to modify
 * @param {boolean} removeDuplicates - should remove duplicate items? (default = true)
 * @returns {string} cleaned CSV string
 */
function cleanCsvString(str, removeDuplicates) {

john-doherty

(function (window) {

    if ((/Macintosh/gi).test(navigator.userAgent) && (/Chrome|Safari|Firefox/gi).test(navigator.userAgent)) {

        history.pushState(null, null, location.href);
        window.onpopstate = function(event) {
            history.go(1);
        };
    }

john-doherty

(function (window) {

    'use strict';

    var oldSetTimeout = window.setTimeout;

    /**
     * Behaves the same as setTimeout but uses requestAnimationFrame() for better performance
     * @param {function} fn The callback function
     * @param {int} delay The delay in milliseconds

john-doherty

// 1) visit yclist.com
// 2) open the browser console
// 3) run the following

// get all table rows
var rows = Array.prototype.slice.call(document.querySelectorAll('#companies tbody tr'));

// extract descriptions (use lastChild to skip aquired etc)
var descriptions = rows.map(function (row) { return row.cells[5].lastChild.textContent.trim(); });