David Arendsen davidarendsen

## GUIDE.md

      
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                davidarendsen
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              Created
              January 11, 2026 12:20
                — forked from marckohlbrugge/GUIDE.md
            
          
    🆕 Update: See more extensive repo here: https://github.com/marckohlbrugge/unofficial-37signals-coding-style-guide
The Unofficial 37signals/DHH Rails Style Guide

About This Document

This style guide was generated by Claude Code through deep analysis of the Fizzy codebase - 37signals' open-source project management tool.
Why Fizzy matters: While 37signals has long advocated for "vanilla Rails" and opinionated software design, their production codebases (Basecamp, HEY, etc.) have historically been closed source. Fizzy changes that. For the first time, developers can study a real 37signals/DHH-style Rails application - not just blog posts and conference talks, but actual production code with all its patterns, trade-offs, and deliberate omissions.

  
## HTTPSocket.php
<?php

/**
 * Socket communication class.
 *
 * Originally designed for use with DirectAdmin's API, this class will fill any HTTP socket need.
 *
 * Very, very basic usage:
 *   $Socket = new HTTPSocket;
 *   echo $Socket->get('http://user:pass@somesite.com/somedir/some.file?query=string&this=that');

## mysql_backup.sh
#!/bin/bash

#
# 	Use this script to perform a backup of a MySQL database.
#

# The database name
db_name="database1"

# The host name of the MySQL database server; usually 'localhost'

## woocommerce-set-tax-class.php
<?php

add_filter( 'woocommerce_before_calculate_totals', 'change_cart_items_prices', 10, 1 );

function change_cart_items_prices( $cart_object ) {
    $customer = $cart_object->get_customer();
    $billing = $customer->get_billing();

    foreach ( $cart_object->get_cart() as $cart_item ) {
        //Set tax class 'Zero Rate' for businesses outside The Netherlands

## soft_deletable.rb
module SoftDeletable
  extend ActiveSupport::Concern

  included do
    default_scope { where(:deleted_at => nil) }
    scope :with_trashed, -> { unscope(where: :deleted_at) }
    scope :only_trashed, -> { unscope(where: :deleted_at).where.not(deleted_at: nil) }
  end

  def destroy

## get_uri.php
<?php
/**
 * Get's the current "pretty" URI from the URL.  It will also correct the QUERY_STRING server var and the $_GET array.
 * It supports all forms of mod_rewrite and the following forms of URL:
 *
 * http://example.com/index.php/foo (returns '/foo')
 * http://example.com/index.php?/foo (returns '/foo')
 * http://example.com/index.php/foo?baz=bar (returns '/foo')
 * http://example.com/index.php?/foo?baz=bar (returns '/foo')
 *

## .bashrc
export PATH=~/bin:$PATH

txtblk='\e[0;30m' # Black - Regular
txtred='\e[0;31m' # Red
txtgrn='\e[0;32m' # Green
txtylw='\e[0;33m' # Yellow
txtblu='\e[0;34m' # Blue
txtpur='\e[0;35m' # Purple
txtcyn='\e[0;36m' # Cyan
txtwht='\e[0;37m' # White

## image_slider.html
<!DOCTYPE HTML>
<html>

<head>
	<title>Image Slider jQuery</title>

	<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
	<script>
	function img_slider(number)
	{

## nested_arrays.php
<?php

function recursive($array)
{
	if ( is_array($array) )
	{
		foreach ($array as $key => $row)
		{
			if ( ! is_array($row) )
			{
	<?php

	/**
	* Socket communication class.
	*
	* Originally designed for use with DirectAdmin's API, this class will fill any HTTP socket need.
	*
	* Very, very basic usage:
	* $Socket = new HTTPSocket;
	* echo $Socket->get('http://user:pass@somesite.com/somedir/some.file?query=string&this=that');
	#!/bin/bash

	#
	# Use this script to perform a backup of a MySQL database.
	#

	# The database name
	db_name="database1"

	# The host name of the MySQL database server; usually 'localhost'
	<?php

	add_filter( 'woocommerce_before_calculate_totals', 'change_cart_items_prices', 10, 1 );

	function change_cart_items_prices( $cart_object ) {
	$customer = $cart_object->get_customer();
	$billing = $customer->get_billing();

	foreach ( $cart_object->get_cart() as $cart_item ) {
	//Set tax class 'Zero Rate' for businesses outside The Netherlands
	module SoftDeletable
	extend ActiveSupport::Concern

	included do
	default_scope { where(:deleted_at => nil) }
	scope :with_trashed, -> { unscope(where: :deleted_at) }
	scope :only_trashed, -> { unscope(where: :deleted_at).where.not(deleted_at: nil) }
	end

	def destroy
	<?php
	/**
	* Get's the current "pretty" URI from the URL. It will also correct the QUERY_STRING server var and the $_GET array.
	* It supports all forms of mod_rewrite and the following forms of URL:
	*
	* http://example.com/index.php/foo (returns '/foo')
	* http://example.com/index.php?/foo (returns '/foo')
	* http://example.com/index.php/foo?baz=bar (returns '/foo')
	* http://example.com/index.php?/foo?baz=bar (returns '/foo')
	*
	export PATH=~/bin:$PATH

	txtblk='\e[0;30m' # Black - Regular
	txtred='\e[0;31m' # Red
	txtgrn='\e[0;32m' # Green
	txtylw='\e[0;33m' # Yellow
	txtblu='\e[0;34m' # Blue
	txtpur='\e[0;35m' # Purple
	txtcyn='\e[0;36m' # Cyan
	txtwht='\e[0;37m' # White
	<!DOCTYPE HTML>
	<html>

	<head>
	<title>Image Slider jQuery</title>

	<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
	<script>
	function img_slider(number)
	{
	<?php

	function recursive($array)
	{
	if ( is_array($array) )
	{
	foreach ($array as $key => $row)
	{
	if ( ! is_array($row) )
	{