Vincent Demeester vdemeester

Summary of book "Clean Architecture" by Robert C. Martin

Uncle Bob, the well known author of Clean Code, is coming back to us with a new book called Clean Architecture which wants to take a larger view on how to create software.

Even if Clean Code is one of the major book around OOP and code design (mainly by presenting the SOLID principles), I was not totally impressed by the book.

Clean Architecture leaves me with the same feeling, even if it's pushing the development world to do better, has some good stories and present robust principles to build software.

The book is build around 34 chapters organised in chapters.

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

A Gopher Rising

Inspired by Maya Angelou's Still I Rise

You may walk through my GitHub history,
With it’s non idiomatic and fragal lines,
You may value me less than dirt,
But still, like dust, I’ll rise.

Nix seems perfect for developers - until I try to use it...

Want to use Nix for development but you're not sure how? Concerned about the fluidity of nixpkgs channels or not being able to easily install arbitrary package versions?

When I first heard about Nix it seemed like the perfect tool for a developer. When I tried to actually use it for developing and deploying web apps, though, the pieces just didn't seem to add up.

General notes

nix-channel and ~/.nix-defexpr are gone. We'll use $NIX_PATH (or user environment specific overrides configured via nix set-path) to look up packages. Since $NIX_PATH supports URLs nowadays, this removes the need for channels: you can just set $NIX_PATH to e.g. https://nixos.org/channels/nixos-15.09/nixexprs.tar.xz and stay up to date automatically.
By default, packages are selected by attribute name, rather than the name attribute. Thus nix install hello is basically equivalent to nix-env -iA hello. The attribute name is recorded in the user environment manifest and used in upgrades. Thus (at least by default) hello won't be upgraded to helloVariant.

@vcunat suggested making this an arbitrary Nix expression rather than an attrpath, e.g. firefox.override { enableFoo = true; }. However, such an expression would not have a key in the user environment, unlike an attrpath. Better to require an explicit flag for this.

TBD: How to deal with search path clashes.

If you came here from a talk or workshop:

Please take a minute and send me some feedback here

Connect with me on LinkedIn or Twitter
Send me an email
Book a call

Get all the most current info here

	#!/bin/sh
	#
	# This script should prevent the following suspend errors
	# which freezes the Dell Inspiron laptop.
	#
	# Put it in /usr/lib/systemd/system-sleep/xhci.sh
	#
	# The PCI 00:14.0 device is the usb xhci controller.
	#
	# kernel: [67445.560610] pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 returns -16

	# Description: Boxstarter Script
	# Author: Jess Frazelle <[email protected]>
	# Last Updated: 2017-09-11
	#
	# Install boxstarter:
	# . { iwr -useb http://boxstarter.org/bootstrapper.ps1 } \| iex; get-boxstarter -Force
	#
	# You might need to set: Set-ExecutionPolicy RemoteSigned
	#
	# Run this boxstarter by calling the following from an elevated command-prompt:

	wget -nc http://ftp.debian.org/debian/dists/jessie/main/installer-amd64/current/images/netboot/debian-installer/amd64/linux
	wget -nc http://ftp.debian.org/debian/dists/jessie/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
	cp -nv ~/.ssh/id_rsa.pub .
	qemu-system-x86_64 -machine accel=kvm -kernel linux -initrd initrd.gz -m 1G -smp 2 -append "blacklist=vga16fb fb=false video=false vga=normal auto=true url=http://10.0.2.10:8080/debian-preseed.txt hostname=otto domain=" -net user,guestfwd=:10.0.2.10:8080-cmd:"/bin/busybox httpd -i" -hda /dev/shm/deb.img -net nic -display none

	- repo: git://github.com/pre-commit/pre-commit-hooks
	sha: 'v0.4.2'
	hooks:
	- id: check-merge-conflict
	- id: end-of-file-fixer
	files: '\.(go\|md\|sh\|yml\|yaml\|Dockerfile\|json\|ini)$'
	exclude: '^vendor/'
	- id: trailing-whitespace
	files: '\.(go\|sh\|yml\|yaml\|Dockerfile\|json\|ini)$'
	exclude: '^vendor/'