chadfennell

name	module-design
description	Use when creating new modules, splitting responsibilities, designing APIs, or deciding what to expose publicly — guides deep module design and information hiding

Module Design

Based on John Ousterhout's "A Philosophy of Software Design."

Core Principle

chadfennell

# Basic settings
set -g base-index 1
setw -g pane-base-index 1
set -g default-shell /usr/bin/zsh
set -g history-limit 2000
set -g mouse off
set -g status on

# Status bar colors
set -g status-style bg=green,fg=black

chadfennell

#!/bin/sh

## 1Password CLI: https://developer.1password.com/docs/cli/
## per-env vaults e.g.
# my-proj-local
# my-proj-stage
# my-proj-prod

export OP_ACCOUNT="a-company-name-here.1password.com"
$(op signin);

chadfennell

#!/usr/bin/env bash
set -euo pipefail

# Sync secrets from 1Password to Fly.io
# Usage: ./fly-secrets-hydrate.sh <prod|stage>

# Pre-requisites:
# flyctl https://fly.io/docs/flyctl/install/
# 1Password op https://developer.1password.com/docs/cli/get-started/

chadfennell

Result (monad)

https://pypi.org/project/result/

from result import Ok, Err, Result, is_ok, is_err

def get_user_by_email(email: str) -> Result[User, str]:
    """
    Return the user instance or an error message.

chadfennell

defmodule YourAppWeb.Components.Navbar do
  use Phoenix.Component
  use CVA.Component

  variant(
    :size,
    [
      xs: "h-10 w-full mb-3",
      sm: "h-12 w-full mb-6",
      md: "h-14 w-full mb-8",

chadfennell

defmodule Parsie do
  @moduledoc """
  From this talk: https://www.youtube.com/watch?v=xNzoerDljjo
  """

  def run do
    input = "select col1 from (
      select col2, col3 from
        (
          select foo from some_table

chadfennell

#!/bin/bash

# 1) Create a Secure Note
# 2) Add a section titled "ENV" (or pick your own title but adjust the script below)
# 3) Add a Password Field (repeat this as many times as you like)
# 4) Replace "password" with your export field name (e.g. AWS_S3_KEY_ID)
# 5) Set the value of the field (e.g. the actual AWS key id)
# 6) tag the item with "exports" (or pick your own tag but adjust the script below)

chadfennell

Keybase proof

I hereby claim:

• I am chadfennell on github.
• I am chadfennell (https://keybase.io/chadfennell) on keybase.
• I have a public key ASDcBg3epvKxMuU6AGCReOMd96A4oXZhfjVoxtedjhN4Wgo

To claim this, I am signing this object:

chadfennell

module MyForwardable
  def def_delegator(obj, method)
    define_method(method) do
      self.public_send(obj).public_send(method)
    end
  end
end

class Dog
  def speak