Skip to content

Instantly share code, notes, and snippets.

elle / gol.rb
Last active February 27, 2022 23:24
Conway's game of life
View gol.rb
class LiveCell
2 =>,
3 =>,
def next_generation(living_neighbours_count)
TRANSITION_RULES.fetch(living_neighbours_count) { }
View gist:c06c554f78daefe09631beaa4227c1c4
# Ways to execute a shell script in Ruby
# Example Script - Joseph Pecoraro
cmd = "echo 'hi'" # Sample string that can be used
# 1. Kernel#` - commonly called backticks - `cmd`
# This is like many other languages, including bash, PHP, and Perl
# Returns the result of the shell command
# Docs:
elle / basic_authentication.rb
Last active December 8, 2017 01:57
Using Rack::Auth::Basic
View basic_authentication.rb
# config/staging.rb
Rails.application.configure do
config.middleware.use "::Rack::Auth::Basic" do |u, p|
# .env
BASIC_AUTH_PASSWORD = some_password
elle /
Created August 21, 2017 06:18 — forked from JoshCheek/
Modules (lesson from 29 July 2015) covers object model, namespaces, mixins, and functions.


To understand modules, we first have to understand a little bit about how Ruby works. So, lets define the things that exist in Ruby and see how they work together. Then, we will be able to understand how modules fit into this, and what they are here for.


elle / vim
Created August 19, 2017 11:11 — forked from jessedearing/vim
Vim Cheatsheet
View vim

#Vim Cheat Sheet

  • gqip - Reformats paragraph to textwidth
  • gq - Reformats selection
  • :Tab /= - Equally spaces based on the = symbol (requires Tabular vim plugin)
  • :setf language - Changes current language
  • :set language=language - Changes current language
  • <C-a> - Increments the number under the cursor
  • <C-x> - Decrements the number under the cursor
  • ~ - Toggles case and moves to next character in normal mode
elle /
Last active October 2, 2022 22:56
NYC Recommendations

Coding Problems

Evaluation criteria

  • Code demonstrates knowledge of Ruby syntax, style, organisation, and refactoring
  • Code is divided into logical components and methods with clear responsibility.
  • Code meets all requirements as laid out per the specification.

In one sentence: we are looking for simplicity, readability, and good practices

elle / playing-with-structs.rb
Last active March 7, 2016 16:14
View playing-with-structs.rb
# POODR page 28
Wheel =, :tire)
def wheelify(data)
data.collect {|cell|[0], cell[1])}
# POODR Page 32
class Gear
attr_reader :chainring, :cog, :wheel
def initialize(chainring, cog, rim, tire)
elle /
Last active September 12, 2021 11:05
Notes from Poodnyc 2015 workshop

Rules for Horizontal Refactoring

  • If you go red, undo
  • Only change one line at a time
  1. Find two strings that are the most alike
  2. Find the smallest difference
  3. Make the smallest change that make the tests pass

How to make a small change

elle / data_retriever.rb
Last active August 29, 2015 14:18
View data_retriever.rb
require "json"
require "net/http"
class DataRetriever
include ActiveModel::Model
attr_reader :search_param, :search_by_id
def get_data(search_param, options = {})
@search_by_id = options.fetch([:search_by_id], false)
@search_info = search_info