David Corking dcorking

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

Multiple MySQL Versions for Development

Options included below:

Using Docker docker-compose
Using Homebrew brew

Using Docker (recommended)

This gist was originally created for Homebrew before the rise of Docker, yet it may be best to avoid installing mysql via brew any longer. Instead consider adding a barebones docker-compose.yml for each project and run docker-compose up to start each project's mysql service.

##1 starting

Firstly, using terminal install YQL and request if you don't have it already:

npm install request
npm install yql

Create a new .js file - make sure you can navigate to it with the terminal prompt to run.

In the below keyboard shortcuts, I use the capital letters for reading clarity but this does not imply shift, if shift is needed, I will say shift. So ⌘ + D does not mean hold shift. ⌘ + Shift + D does of course.

Tabs and Windows

Function	Shortcut
New Tab	`⌘` + `T`
Close Tab or Window	`⌘` + `W` (same as many mac apps)
Go to Tab	`⌘` + `Number Key` (ie: `⌘2` is 2nd tab)
Go to Split Pane by Direction	`⌘` + `Option` + `Arrow Key`

	module.exports = {
	promisify: function (web3) {
	// Pipes values from a Web3 callback.
	var callbackToResolve = function (resolve, reject) {
	return function (error, value) {
	if (error) {
	reject(error);
	} else {
	resolve(value);
	}

	# first we download the list of IP ranges from CloudFlare
	wget https://www.cloudflare.com/ips-v4

	# set the security group ID
	SG_ID="sg-00000000000000"

	# iterate over the IP ranges in the downloaded file
	# and allow access to ports 80 and 443
	while read p
	do

	#!/usr/bin/env bash

	# this can be useful when developing against a custom DNS server, or
	# for example, if you made a change to the DNS settings of a domain, and you
	# know the authoritative nameserver IP address for a domain, you could use this
	# to bypass the intermediate DNS cache, and apply an HTTP request using the new
	# DNS settings supplied by your specified (authoritative) nameserver

	curl --dns-servers <DNSIP,DNSIP> url.com

	/*
	This script attempts to identify all CSS classes mentioned in HTML but not defined in the stylesheets.

	In order to use it, just run it in the DevTools console (or add it to DevTools Snippets and run it from there).

	Note that this script requires browser to support `fetch` and some ES6 features (fat arrow, Promises, Array.from, Set). You can transpile it to ES5 here: https://babeljs.io/repl/ .

	Known limitations:
	- it won't be able to take into account some external stylesheets (if CORS isn't set up)
	- it will produce false negatives for classes that are mentioned in the comments.

	# preview the most recently modified file in the current directory
	ls -t \|head -n 1 \| xargs less # sadly less drops out on SIGINT