Johannes Daxböck dingsdax

name	ruby-modern-idioms
description	Review Ruby code for semantic idioms that linters cannot catch. Use when reviewing any Ruby file for method naming violations (call), pattern matching on Result objects instead of if/else, Struct used instead of Data.define, or discouraged idioms (tap, &method).

Ruby Modern Idioms

Review Ruby code for semantic idioms that linters cannot catch. RuboCop (rubocop-rails-omakase) already enforces frozen string literals, hash shorthand, endless methods, and it blocks — do not flag those.

LLM Wiki

A pattern for building personal knowledge bases using LLMs.

This is an idea file, it is designed to be copy pasted to your own LLM Agent (e.g. OpenAI Codex, Claude Code, OpenCode / Pi, or etc.). Its goal is to communicate the high level idea, but your agent will build out the specifics in collaboration with you.

The core idea

Most people's experience with LLMs and documents looks like RAG: you upload a collection of files, the LLM retrieves relevant chunks at query time, and generates an answer. This works, but the LLM is rediscovering knowledge from scratch on every question. There's no accumulation. Ask a subtle question that requires synthesizing five documents, and the LLM has to find and piece together the relevant fragments every time. Nothing is built up. NotebookLM, ChatGPT file uploads, and most RAG systems work this way.

Ruby NLP resources

ruby stemmer (expose libstemmer_c to Ruby)
stuff classifier (text classifier; naive bayes & tf/idf)
ve linguistic framework (base form of words, sentence detection, POS, tranliterations, 日本語, english, mecab, freeling)
ruby nlp (n-grams extraction, corpus extractor, brown corpus)
lexeme ( simple lexical analyzer)

The challenge

The challenge was to write a short script in a scripting language of choice that takes in an image of mixed up uniform sized shreds and pieces them back into the unshredded and reconstituted image. That means the original image was divided into an even number of columns of same size and than those columns were shuffled randomly. Additionally the script should auto-detecting how wide the uniform strips are.

The solution

Before I started on my solution, I made some quick assumptions to simplify things:

I wanted to code it in Ruby, simply because it's a great language and I'm quite productive in it.
I wanted to define a simple distance measure which can be used for auto-detecting the column size and putting the shredded image back into its original state.

	#!/usr/bin/env ruby
	# frozen_string_literal: true

	# Sentry Queue Time Test Generator
	#
	# USAGE:
	# export SENTRY_DSN='https://your-key@o123.ingest.us.sentry.io/456'
	# export SENTRY_SKIP_SSL_VERIFY=true # if you get SSL errors
	# ruby sentry_queue_test.rb [duration_minutes] [requests_per_minute] [pattern]
	#

	RACC := racc
	RACCFLAGS := -g

	SOURCES := prolog_parser.ry
	TARGETS := ${patsubst %.ry, %.rb, ${SOURCES}}


	.SUFFIXES : .rb .ry

	%.rb : %.ry

	# Ruby archeology: sources:
	# https://web.archive.org/web/20070226052918/http://codezine.jp/a/article.aspx?aid=461
	# https://web.archive.org/web/20061216170428/http://www.okisoft.co.jp/esc/prolog/in-ruby.html

	# Ruby による簡単な Prolog 処理系 h18.9/8 (鈴)
	# Simple Prolog processing system using Ruby h18.9/8 (Rin)

	# Prolog の述語 (predicate)
	class Pred
	attr_reader :defs

	require "bundler/inline"

	# allows for declaring a Gemfile inline in a ruby script
	# optionally installing any gems that aren't already installed
	gemfile(true) do
	source "https://rubygems.org"

	gem "rails", "6.1.4.1"
	gem "sqlite3"
	gem "graphql", "~> 1.12"

	// WebL Website (archived): http://web.archive.org/web/20070507043202/http://www.hpl.hp.com/downloads/crl/webl/index.html

	// get unique countrynames for the 500 top world universities
	// get number of universities per country, pretty print statistics with a horizontal bar chart
	// data from 2009 version of http://www.arwu.org/ARWU2009.jsp

	import Str;

	var startpage = GetURL("http://www.arwu.org/ARWU2009.jsp");

	#!/usr/bin/perl -w

	use strict;
	use Mail::MboxParser;

	use constant MAILBOX_DIR => "/var/mail/mymailboxdir";
	use constant STORAGE_DIR => "/data";

	if ( -z MAILBOX_DIR ) {
	print STDERR "no mail.\n";