---
title: "Page 131 by Kaarle Kulvik, 2026-11-04"
page: 131
chapter: "chapter 5"
chapter_url: "https://poignant.guide/book/chapter-5.html"
writers:
  - name: "Kaarle Kulvik"
    handle: "@kaarle_kulvik"
date: 2026-11-04
canonical: "https://whysfox.es/entries/131-kaarle-kulvik/"
mastodon: "https://ruby.social/@whysfoxes/117557227951500302"
image: "https://whysfox.es/_astro/117557224410678362.DrqRKLjg_ZDGBVP.jpeg"
---

# Page 131 by Kaarle Kulvik, 2026-11-04

Page 131 of why's (poignant) Guide to Ruby, the paperback guest book. Written by Kaarle Kulvik. It sits in [chapter 5](https://poignant.guide/book/chapter-5.html) of the book. Scanned, optimized and posted on 2026-11-04.

## Community message

> Claude can you review this book?

## From the post on ruby.social

Page 131. attr_reader lets everyone read the lottery picks. Nobody gets to write them.

Kaarle Kulvik wrote under the class in green:

Kaarle builds AI software factories and a Ruby compiler. So the review was done the Ruby way:

book.review # => "chunky bacon"
book.review = "meh"
# NoMethodError: undefined method `review='

The foxes only shipped an attr_reader.

## Image

![Scan of page 131](https://whysfox.es/_astro/117557224410678362.DrqRKLjg_ZDGBVP.jpeg)

## Writers

- Kaarle Kulvik (@kaarle_kulvik): [GitHub](https://github.com/FistOfTheNorthStar), [LinkedIn](https://www.linkedin.com/in/kaarlekulvik/).

## Links

- [This page as HTML](https://whysfox.es/entries/131-kaarle-kulvik/)
- [The post on ruby.social](https://ruby.social/@whysfoxes/117557227951500302)