Cuneyt Ozen littlebeeper

An opinionated list of excellent Clojure learning materials

These resources (articles, books, and videos) are useful when you're starting to learn the language, or when you're learning a specific part of the language. This an opinionated list, no doubt. I've compiled this list from writing and teaching Clojure over the last 10 years.

🔴 Mandatory (for both beginners and intermediates)
🟩 For beginners
🟨 For intermediates

Debugging a Docker image

Start up the Docker container from image:

docker run --entrypoint "/bin/sh" --rm imagename:latest -c "sleep 24h"

Obtain the container hash id:

docker ps

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

	# syntax=docker/dockerfile:1
	# Keep this syntax directive! It's used to enable Docker BuildKit

	# Based on https://github.com/python-poetry/poetry/discussions/1879?sort=top#discussioncomment-216865
	# but I try to keep it updated (see history)

	################################
	# PYTHON-BASE
	# Sets up all our shared environment variables
	################################

	(ns complex-business-process-example
	"A stupid example of a more complex business process to implement as a flowchart.")

	;;;; Config

	(def config
	"When set to :test will trigger the not-boosted branch which won't write to db.
	When set to :prod will trigger the boosted branch which will try to write to the db."
	{:env :prod})

	# pyclean command to clear all python cache in a directory
	# source: https://stackoverflow.com/questions/28991015/python3-project-remove-pycache-folders-and-pyc-files


	# in .bash_profile / .bash_rc etc put:
	pyclean () {
	find . -type f -name '*.py[co]' -delete -o -type d -name __pycache__ -delete
	}

	let regex;

	/* matching a specific string */
	regex = /hello/; // looks for the string between the forward slashes (case-sensitive)... matches "hello", "hello123", "123hello123", "123hello"; doesn't match for "hell0", "Hello"
	regex = /hello/i; // looks for the string between the forward slashes (case-insensitive)... matches "hello", "HelLo", "123HelLO"
	regex = /hello/g; // looks for multiple occurrences of string between the forward slashes...

	/* wildcards */
	regex = /h.llo/; // the "." matches any one character other than a new line character... matches "hello", "hallo" but not "h\nllo"
	regex = /h.llo/; // the "" matches any character(s) zero or more times... matches "hello", "heeeeeello", "hllo", "hwarwareallo"

	/**
	* This will mask a portion of a credit card with 'x' if it finds it in a sentence.
	\b(?:

	# Visa card number 4[\ -](?:\d[\ -]){11}(?:(?:\d[\ -]*){3})?\d\|

	# MasterCard card number (?:5[\ -][1-5](?:[\ -]\d){2}\|(?:2[\
	-]){3}[1-9]\|(?:2[\ -]){2}[3-9][\ -]\d\|2[\ -] [3-6](?:[\ -]*\d){2}\|2[\
	-]7[\ -][01][\ -]\d\|2[\ -]7[\ -]2[\ -]0)(?:[\ -]*\d){12}\|

Cuneyt Ozen littlebeeper

An opinionated list of excellent Clojure learning materials

Table of contents

Debugging a Docker image

General rules

Design rules

	#!/bin/sh

	# recursively removes all .pyc files and __pycache__ directories in the current
	# directory

	find . \| grep -E "(__pycache__\|\.pyc$)" \| xargs rm -rf

	###############################################################################
	# Version 1: using ‘apt-get install’
	# Installs using apt-get
	# Requires update to npm afterwards
	# Harder to get latest copy of node
	# Requires sudo to use npm
	###############################################################################

	# create new docker ubuntu container
	sudo docker run -i -t ubuntu /bin/bash # drops you into container as root