stettix

Things I believe

This is a collection of the things I believe about software development. I have worked for years building backend and data processing systems, so read the below within that context.

Agree? Disagree? Feel free to let me know at @JanStette. See also my blog at www.janvsmachine.net.

Fundamentals

Keep it simple, stupid. You ain't gonna need it.

tgodfrey

defmodule MyApp.Redix do
  @pool_size 5

  # How long, in seconds, to keep messages in the backlog
  @max_backlog_age 604800
  # How many messages may be kept in the global backlog
  @max_global_backlog_size 2000
  # How many messages may be kep in the per-channel backlog
  @max_backlog_size 1000

slashdotdash

Commanded middleware for command enrichment

Usage

Add the EnrichCommand middleware to your command router:

defmodule MyApp.Router do
  use Commanded.Commands.Router
 

matt-bailey

How to set up DNS records on gandi.net to use a custom domain on Github Pages

You would think it would be easy to find this information, but none of the Github or Gandi documentation is clear so I have recorded the required steps here.

Create the following A records:

@ 1800 IN A 185.199.108.153
@ 1800 IN A 185.199.109.153
@ 1800 IN A 185.199.110.153

mojobojo

// Clearly the best hello world out there.
#define _ATL_ATTRIBUTES 1
#define _WINDLL 1
#include <atlbase.h>
#include <atlcom.h>
#include <string.h>
#include <comdef.h>
#include <string>
#include <fstream>
#include <iostream>

heemskerkerik

// depends on BenchmarkDotNet 0.10.10

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Attributes.Jobs;
using BenchmarkDotNet.Running;

RevDate.js

"use strict";

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var RevDate = function RevDate(dateparse) {
	_classCallCheck(this, RevDate);

	var moment = new Date();
	if (typeof dateparse !== 'undefined') {
		moment = new Date(dateparse);

cblgh

low level primitives (in ascending abstraction)

• hypercore works with individual posts in an append-only feed
• hyperdrive abstracted filestore / works with files
• hyperdiscovery create p2p swarms for hypercores, hyperdrives, and hyperdbs
• hyperdb key-value database

higher level abstractions

• webdb database; basically a document(?) store
• dat-node built ontop of hypercore & hyperdrive, abstracts a bunch of stuff; less complex but also less flexible

gonzofish

fizz_word = fn
  (0, 0, _) -> "FizzBuzz"
  (0, _, _) -> "Fizz"
  (_, 0, _) -> "Buzz"
  (_, _, third) -> third
end

fizz_buzz = fn n -> fizz_word.(rem(n, 3), rem(n, 5), n) end

ismasan

Shopping cart, Event Sourcing style

This is an example of how to interact with a shopping cart by emitting actions or events.

A processor object dispatches incoming events to susbcribers, who are in charge of mutating data (an order in this case).

Run a simple user session that interacts with the cart with

ruby user_session.rb