theshank the-shank

Comprehensions in Python the Jedi way

Beautiful is better than ugly. Explicit is better than implicit.

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

PLEASE DON'T USE THIS GUIDE

It's over 9 years old (as of 2024-02-18), there are many better guides! You might like https://rust-unofficial.github.io/too-many-lists/

% Let's build a binary tree!

Let's build a binary tree of strings in Rust. To recap, each node in a binary tree:

must have a value

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

	defmodule MyModule.Router do
	@moduledoc """
	Http Entry Point
	"""

	use Plug.Router
	use Plug.ErrorHandler

	plug Plug.Logger
	plug :match

	# content has to be in .config/fish/config.fish
	# if it does not exist, create the file
	setenv SSH_ENV $HOME/.ssh/environment

	function start_agent
	echo "Initializing new SSH agent ..."
	ssh-agent -c \| sed 's/^echo/#echo/' > $SSH_ENV
	echo "succeeded"
	chmod 600 $SSH_ENV
	. $SSH_ENV > /dev/null

	defmodule MyBlog.Repo.Migrations.CreatePost do
	use Ecto.Migration

	def change do
	create table(:posts, primary_key: false) do
	add :id, :uuid, primary_key: true
	add :body, :string
	add :word_count, :integer

	timestamps

	# Set variables in .bashrc file

	# don't forget to change your path correctly!

	export GOPATH=$HOME/golang
	export GOROOT=/usr/local/opt/go/libexec
	export PATH=$PATH:$GOPATH/bin
	export PATH=$PATH:$GOROOT/bin

	/**
	* Retrieves all the rows in the active spreadsheet that contain data and logs the
	* values for each row.
	* For more information on using the Spreadsheet API, see
	* https://developers.google.com/apps-script/service_spreadsheet
	*/
	function readRows() {
	var sheet = SpreadsheetApp.getActiveSheet();
	var rows = sheet.getDataRange();
	var numRows = rows.getNumRows();