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Over the Shoulder 1 - Text Preprocessing in Forth

Over the Shoulder 1 - Text Preprocessing in Forth

Andreas Wagner
1 HN recommenders · discussed 2017–2025
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About this video

Samuel Falvo II live-codes a text preprocessor and blog engine in Forth over about an hour. It shows Forth's dictionary being snapshotted and restored in place of mutation, and how a small Forth system gets real work done.

Why it appears in the archive

Cited as a concrete look at Forth in action, including its snapshot/restore dictionary model.

AI-generated summary and labels from the source dataset; verify important details against the video. Source & credits.

From the Hacker News discussion

thomascountz · 2025-09 · rec

This is a great resource and running in the browser is great for fast feedback. Thanks for sharing! I just started learning Forth a month or so ago, and I found this video from Andreas Wagner[1] fun to watch. If anyone goes through OP's book and find yourself wanting to see Forth in action, I recommend the video. [1]: [VIDEO]

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brandonbloom · 2017-11 · reference

Clojure is following in the tradition of lisps that do this right. The important bit is the extra indirection on top-level names. I wrote more about it here a long time ago: [LINK] Also interesting is the other end of the spectrum: Forth. Instead of mutation, offers snapshots and restores of the “dictionary”. See this video: [VIDEO]

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pointfree · 2019-07 · reference

"Over the Shoulder 1 - Text Preprocessing in Forth" [VIDEO] - Sam Falvo demonstrates writing a blog engine in Forth.

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