herrkessler / cartesian_product.cr

Created January 10, 2019 15:00

cartesian product example in Ruby, Python and Crystal

	a = (1..2).to_a
	b = (1..7).to_a
	c = (1..144).to_a
	d = (1..37).to_a
	e = (1..28).to_a
	f = (1..12).to_a
	g = (1..16).to_a

	result = Array(Array(Int32)).new
	Array.each_product([a, b, c, d, e, f, g]) do \|x\|

herrkessler / Dockerfile

Created February 26, 2018 10:46 — forked from dogweather/Dockerfile

Docker dev environment for Ruby on Rails

	# Ruby on Rails Development Environment
	FROM ruby:2.5.0

	# Set up Linux
	RUN apt-get update
	RUN apt-get install -y build-essential inotify-tools libpq-dev nodejs postgresql-client

	WORKDIR /app
	EXPOSE 3000

herrkessler / .railsrc

Created February 20, 2018 11:50 — forked from qbantek/.railsrc

Command line options for ` rails new --help ` (Rails 5.1.4). Useful for planning new Ruby on Rails app. 'Where can I find options for “rails new” command?'

	--skip-active-record
	--skip-test-unit
	--skip-system-test
	--skip-turbolinks
	--skip-spring
	--skip-keeps
	--skip-coffee
	--skip-action-cable
	--skip-action-mailer
	--skip-listen

herrkessler / dynamic-critical-path-css.md

Created November 9, 2017 10:54 — forked from taranda/dynamic-critical-path-css.md

Dynamically Add Critical CSS to Your Rails App

Optimizing the delivery of CSS is one way to improve user experience, load speed and SEO of your web app. This involves determining the "critical path CSS" and embeding it into the html of your page. The rest of the CSS for the site is loaded asynchronously so it does not block the rendering of your "above the fold" content. This Gist will show you how to dynamically generate critical path CSS for your Rails app.

In this example we will use the mudbugmedia/critical-path-css gem.

Prerequisites

You will need to set up caching and Active Job in your Rails app. I recommend using a thread-safe background job manager like resque.

herrkessler / nodeRest.js

Last active October 2, 2017 09:50

Sequelize, Restify & Epilouge with PostGres

	const Sequelize = require('sequelize'),
	epilogue = require('epilogue'),
	restify = require('restify'),
	passwordHash = require('password-hash');

	// Define your models
	const database = new Sequelize('whateverDatabase', 'rootUser', 'rootPassword', {
	host: 'localhost',
	dialect: 'postgres',
	});

herrkessler / aes_enc_dec.php

Created August 30, 2017 15:04 — forked from turret-io/aes_enc_dec.php

AES encryption/decryption in PHP

	<?php
	// DEFINE our cipher
	define('AES_256_CBC', 'aes-256-cbc');

	// Generate a 256-bit encryption key
	// This should be stored somewhere instead of recreating it each time
	$encryption_key = openssl_random_pseudo_bytes(32);

	// Generate an initialization vector
	// This MUST be available for decryption as well

herrkessler / native-fonts.sass

Last active August 30, 2017 15:05

Native font stack from bootstrap 4 reboot

$font-family-sans-serif: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif !default

herrkessler / check-webp.js

Last active August 17, 2017 07:45 — forked from jakearchibald/1.js

check webp support by jakearchibald -- https://gist.github.com/jakearchibald/6c43d5c454bc8f48f83d8471f45698fa

	async function supportsWebp() {
	if (!self.createImageBitmap) return false;

	const webpData = 'data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAAAAAAfQ//73v/+BiOh/AAA=';
	const blob = await fetch(webpData).then(r => r.blob());
	return createImageBitmap(blob).then(() => true, () => false);
	}

	addEventListener('install', event => {
	event.waitUntil(async function() {

herrkessler / async.js

Created August 15, 2017 11:12

simple node async / await multiple requests with axios

	const axios = require('axios');

	const locations = ['London', 'San Francisco', 'Tokyo', 'Berlin'];
	const apiURL = 'http://api.openweathermap.org/data/2.5/weather';
	const token = 'xxxxx';

	const logPosts = async () => {
	try {
	let allLocations = locations.map(town => axios(`${apiURL}?q=${town}&APPID=${token}`));
	let weather = await Promise.all(allLocations);

herrkessler / async-await.js

Created July 12, 2017 08:14 — forked from wesbos/async-await.js

Simple Async/Await Example

	// 🔥 Node 7.6 has async/await! Here is a quick run down on how async/await works

	const axios = require('axios'); // promised based requests - like fetch()

	function getCoffee() {
	return new Promise(resolve => {
	setTimeout(() => resolve('☕'), 2000); // it takes 2 seconds to make coffee
	});
	}

Sebastian Kessler herrkessler

Dynamically Add Critical CSS to Your Rails App

Prerequisites