Retina

I just released Retina 0.8.2. It's a fairly big release with a new stage type, new substitution syntax and a couple new options. See the changelog or updated documentation for details.

After a month of work (and many more months of planning), Retina 1.0 is finally done. It should soon be available on TIO. In the meantime, if you're interested you can get a headstart with the changelog and the documentation.

Retina 1.0 Roadmap

[x] Make interpreter work with arbitrary streams to stub I/O and make entire programs testable.
[x] Add test suites for currently untested stage types, as well as some features like groups and loops.
[x] Refactor to make more use of compound stages for options that interact with one another.
[x] Unify stage semantics (bisection into matches and non-matches, first limit, @ and $ options, maybe ^ and & options)
[x] Add option to switch input string with regex.
[x] Add capabilities to work with non-matches and adjacent matches/non-matches in substitutions.

@FryAmTheEggman btw, I'm finally starting work on that major update we talked about months ago (unifying how all the stages work and then implementing a good bunch of features on top of that).

Great news for the three people actually using Retina (or the one person among them who uses VS Code): a friend and I have spent the weekend writing a VS Code Extension that lets you run Retina scripts over your files or selections, as a more powerful alternative to Search and Replace: marketplace.visualstudio.com/items?itemName=m-ender.retinate

For a rectangular input, if you know the number of characters per line, something like this can work Try it online!

oh and I'm not counting Retina, because it's kinda straddling the boundary between esolang and practical language at this point.

Wait, I think I found something much simpler: tio.run/nexus/…