IdeaWell

Project ideas from Hacker News discussions.

Knuth reward check

Original Article

Hacker News Discussion

📝 Discussion Summary (Click to expand)

Three prevalent themes in the discussion

  1. Personal anecdotes about receiving, losing, or valuing Knuth reward checks
  2. “Awesome! I know the feeling, I have two myself.” – janvdberg
  3. “The biggest shame of my life is that I had one of these and somehow managed to lose it.” – CurtHagenlocher
  4. “I lost one of mine but Knuth kindly sent me a replacement.” – kens

  5. “I received two checks in the very early 2000s and my name isn’t on this list.” – blltprfmnk

  6. Admiration for the extreme scrutiny and non‑monetary motivation behind Knuth’s reward system

  7. “I’m on the mailing list where errors related to TeX are submitted and the level of scrutiny behind submissions is truly mind‑boggling.” – dhosek
  8. “Honestly, I wish all software were subject to that much scrutiny.” – ryandrake
  9. “No other writers have the stature of Knuth. The motivation to proof‑read here is not the monetary reward after all.” – chompychop

  10. “What a brilliant teaching technique, think of how many people studied his work for bounties that they would never cash.” – largbae

  11. Debate over the data, lists, and accuracy of reward‑check statistics

  12. “These account balances reflect only the rewards for errors reported since the beginning of 2006. Many reward checks were issued during 1968--2005, too numerous to mention here.” – zimpenfish (quoting the Stanford page)
  13. “Although that omits the paper check era.” – dhosek
  14. “I would take it as authoritative unless there is a better source.” – jacquesm (on the boss.html list)
  15. “High balance doesn’t necessarily mean high number of checks, especially since the checks can have different values.” – zimpenfish
  16. “I’m surprised we haven’t heard of anyone running an AI on Donald Knuth's books to generate the largest collection of checks in existence…” – assumed_throwaw

🚀 Project Ideas

SlashFix: Automatic Trailing‑Slash & Relative‑URL Fixer

Summary

  • A browser extension (or lightweight proxy) that detects missing trailing slashes on page URLs and rewrites relative resource links (images, CSS, JS) so they resolve correctly, fixing broken images like those on the Knuth reward check page.
  • Core value: eliminates a common class of 404 errors caused by URL‑slash mismatches, saving users time and improving site reliability without requiring site owners to change anything.

Details

Key Value
Target Audience Web surfers, developers, archive enthusiasts who frequently encounter broken images due to missing slashes
Core Feature Detects URL without trailing slash, auto‑redirects to slash‑ended version and rewrites relative href/src attributes to use the correct base
Tech Stack Manifest V3 Chrome/Firefox Extension (HTML/CSS/JS), optional Service Worker for proxy mode
Difficulty Low
Monetization Hobby

Notes

  • Users complained: “Images weren't loading for me… the HN URL is missing the trailing slash” (deathanatos, TimK65) and “the images, whose hrefs are like src="./bug-report-knuth-2006.jpg" result in a 404.”
  • Could spark discussion on URL best practices and be useful for preserving legacy sites or Wayback Machine snapshots where relative links break.

KnuthCheck Archive: Crowdsourced Repository of Knuth Reward Checks

Summary

  • A searchable, community‑driven database where users can upload scans or photos of their Knuth reward checks, tag them with date, amount (including Knuth’s hexadecimal notation), and the error they reported, creating a growing catalog of both digital and paper‑era checks.
  • Core value: preserves a piece of computing history, lets collectors see how many checks others have, and helps recover missing data from the pre‑2006 “paper era” that isn’t reflected in the online balance list.

Details

Key Value
Target Audience Knuth reward check recipients, TeX/LaTeX enthusiasts, computer science historians, memorabilia collectors
Core Feature Upload image + metadata, full‑text search, leaderboard of most checks/total value, API for developers to query the collection
Tech Stack Backend: Python/FastAPI or Node.js/Express; DB: PostgreSQL with JSONB for flexible metadata; Storage: AWS S3 or similar; Frontend: React/Vue with IIF‑style image viewer
Difficulty Medium
Monetization Hobby (optional donation “buy‑me‑a‑coffee” for server costs)

Notes

  • Commenters expressed interest in recovering the “paper era”: “We probably have a substantial subset of the people on that list on HN, so it might be possible to recover a chunk of the ‘paper era’” (jacquesm) and personal anecdotes about lost checks (CurtHagenlocher, kens).
  • Provides a tangible way for the community to contribute, discuss rare checks, and settle debates about totals (e.g., jdw64’s query about most checks held).

HexDollar Converter: Knuth Reward Notation Calculator

Summary

  • A simple web tool that parses Knuth’s unique hexadecimal‑dollar notation (e.g., 0x$1.20, 0x$0.80) and converts it to standard decimal dollars, also allowing users to sum multiple checks to see their total earnings.
  • Core value: clears up confusion over Knuth’s notation (many commenters questioned the conversion) and gives collectors a quick way to track the monetary value of their reward‑check collection.

Details

Key Value
Target Audience Anyone who has received a Knuth reward check, TeX developers, collectors curious about the worth of their checks
Core Feature Input one or more Knuth‑style amounts, instantly see decimal equivalents and total sum; optional export to CSV
Tech Stack Static site: HTML + vanilla JS (or a small Svelte/Vue component); no backend needed
Difficulty Low
Monetization Hobby

Notes

  • Users noted confusion: “0x1.20 should really be decimal 1.125” (deathanatos) and “I bet the mailing cost was more than 0x$2.00 for Knuth” (utopcell), showing the need for a reliable converter.
  • Could be embedded in the KnuthCheck Archive or used as a standalone utility, encouraging discussion about the quirky reward system and its historical significance.

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