Skip to content

Instantly share code, notes, and snippets.


Dan Levy justsml

View GitHub Profile

Speaker Rider

by Tatiana Mac

Before I'll agree to a speaking event, I try to do as much research I can around the event to ensure it aligns with my ethos. I want to share this in case it's helpful to any other speakers.

👐 Speaking comes with immense privilege. I am grateful to all the conference organisers who have brilliantly hosted me. I would love to continue to exercise this privilege to speak at conferences, and use this privilege to make the landscape more accessible and beneficial to tech's most marginalised and suppressed communities.

😫 I wish I didn't have to, but this is long because I provide a lot of explanations for those of you who never had to consider these things. And I will be honest, most thoughtful conferences I've attended check most of these boxes intrinsically, particularly when conference runners are experienced speakers. They get it.

1️⃣ All of these are based on my own ethos. I don't wish to or attempt to speak on behalf of all conference speake

View postgres

Postgres Cheatsheet

This is a collection of the most common commands I run while administering Postgres databases. The variables shown between the open and closed tags, "<" and ">", should be replaced with a name you choose. Postgres has multiple shortcut functions, starting with a forward slash, "". Any SQL command that is not a shortcut, must end with a semicolon, ";". You can use the keyboard UP and DOWN keys to scroll the history of previous commands you've run.


installation, Ubuntu

View auth-complex.js
// Easier to follow. Equally easy to test -- and with one fewer function in need of testing.
import { userInfo } from "os";
const Promise = require("bluebird");
const { hashStringAsync } = Promise.promisifyAll(require("./lib/crypto"));
const { logEventAsync } = Promise.promisifyAll(require("./lib/log"));
const { openAsync } = Promise.promisifyAll(require("./lib/db"));
const { TimeoutError, ValidationError, NotFoundError } = require("./errors");
justsml / myController.js
Last active Aug 29, 2018 — forked from Tinusw/myController.js
a promise example
View myController.js
const mongoose = require('mongoose');
const Store = mongoose.model('Store');
const StoreB = mongoose.model('StoreB');
// Tells package to use es6 promises
mongoose.Promise = global.Promise;
exports.createStore = (req, res, next) => {
const store = new Store(req.body);
const itemB = StoreB
justsml /
Created Jul 11, 2018 — forked from Kartones/
PostgreSQL command line cheatsheet


Magic words:

psql -U postgres

Some interesting flags (to see all, use -h):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
justsml /
Last active Oct 20, 2020 — forked from rands0n/
echo "Starting XCode Command Line Tools Setup... Continue using the GUI prompt..."
sleep 4s
xcode-select --install
echo "DONE: Installing XCode Command Line Tools\!"
# install homebrew
/usr/bin/ruby -e "$(curl -fsSL"
justsml /
Last active Dec 30, 2017 — forked from tylerwalts/
This is a bash script to setup Mac OS X defaults on a new mac.
# Set up OSX preferences
# Updated By: Dan Levy @justsml
# Inspired by:
View bluebird-concurrent-download-using-map-then.js
const Bluebird = require('bluebird')
const got = require('got')
const urls = [
// Bluebird is an extension of promises:
View beautiful-html5-dialog.css
dialog {
position: fixed;
top: 50%;
left: 50%;
right: auto;
padding: 30px;
transform: perspective(500px) translate(-50%, -50%);
background: linear-gradient(to bottom, #FFF, #F4F4F4) #FFF;
border: none;
border-radius: 3px;
justsml / PinchZoomPan.js
Last active Oct 4, 2017 — forked from iammerrick/PinchZoomPan.js
React Pinch + Zoom + Pan
View PinchZoomPan.js
import React from 'react';
const MIN_SCALE = 1;
const MAX_SCALE = 4;
const SETTLE_RANGE = 0.001;
const ANIMATION_SPEED = 0.04;
const INITIAL_X = 0;
You can’t perform that action at this time.