Ryan Campbell campbellr

So you want to write a sync system for a web app with offline and realtime support? Good luck. You might find the following resources useful.

Overview articles

Database in a browser, a spec (Stepan Parunashvili)

What problem are we trying to solve with a sync system?
The web of tomorrow (Nikita Prokopov)

Adding tailscale to an EdgeRouter (and surviving system upgrades)

I suggest you run sudo bash on all of these so you're the root user.

Installing

Download tailscale and put the files in /config/. Find the latest stable or unstable version for your EdgeRouter's processor (ex. ER4 is mips and ERX is mipself)

sudo bash    # if you havent already

This recipe is a work in progress and has never been run as-is.

timeouts are in ms
lock timeout: in postgres, when a statement that wants a restrictive lock waits on another lock, other statements that want locks can't jump the queue. so even though the statement that is waiting might only take a very short amount of time, when it starts running, while it is waiting no other statements can begin. So we set the lock timeout pretty low and retry if we don't get it.
statement timeout: we set a short statement timeout before statements which do lock and which we expect to take a short amount of time, just in case something about our assumptions/understanding is wrong and the statement ends up taking a long time. if this happens the statement will bail early without causing harm, and we can investigate what is wrong with

Introductory resources

High level overview https://yogthos.github.io/ClojureDistilled.html
An Animated Introduction to Clojure https://markm208.github.io/cljbook/
Interactive tutorial in a browser https://tryclojure.org/
Interactive exercises http://clojurescriptkoans.com/
Clerk notebooks with introductory examples https://github.clerk.garden/anthonygalea/notes-on-clojure
More interactive exercises https://4clojure.oxal.org/
Lambda Island tutorials https://lambdaisland.com/
Functional Programming with Clojure resources https://practicalli.github.io/

Gmail and GitHub

How to filter emails from GitHub in Gmail and flag them with labels.

The labels in this document are just examples.

Pull Request

Filter	Label

Single Node Kubernetes Cluster

sudo docker run -d --net=host --privileged --name=kubestack \
-v /sys:/sys:ro \
-v /:/rootfs:ro \
-v /var/run/docker.sock:/var/run/docker.sock \
-v /var/run:/var/run:rw \
-v /var/lib/kubelet/:/var/lib/kubelet:rw \
-v /var/lib/docker/:/var/lib/docker:ro \

	# See https://github.com/regolith-linux/regolith-desktop/issues/32

	echo "deb http://ppa.launchpad.net/regolith-linux/release/ubuntu bionic main" > /etc/apt/sources.list.d/regolith.list
	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EFC31B0AE9F1000B38E37FC8C0930F305A0E0FEF
	apt update
	apt install devscripts build-essential cdbs libxcb1-dev gperf pkg-config xutils-dev
	# create setup folder
	mkdir rego-setup && cd rego-setup/
	wget http://archive.ubuntu.com/ubuntu/pool/main/x/xcb-util/xcb-util_0.4.0.orig.tar.gz
	wget http://archive.ubuntu.com/ubuntu/pool/main/x/xcb-util/xcb-util_0.4.0-0ubuntu3.debian.tar.xz

	#!/usr/bin/perl
	# Scan unstaged changes in git tracked files, identify which commits they could
	# be applied to as fixups, and automatically produce the appropriate "fixup!"
	# commits for use with "git rebase -i --autosquash".
	#
	# Copyright (C) 2016, 2017 by Mat Sutcliffe
	# This program is free software; you can redistribute it and/or modify it under
	# the GNU General Public License as published by the Free Software Foundation;
	# either version 2 of the License, or (at your option) any later version.

	// Source: http://nicolasmerouze.com/guide-routers-golang/

	// Package httprouterwrapper allows the use of http.HandlerFunc compatible funcs with julienschmidt/httprouter
	package httprouterwrapper

	import (
	"net/http"

	"github.com/gorilla/context"
	"github.com/julienschmidt/httprouter"

	import Ember from 'ember';

	export default Ember.ObjectController.extend({
	queryParams: ['page'],
	page: 1,
	comments: Ember.K(),

	paginationObserver: function() {
	var id = this.get('id'),
	page = this.get('page'),