Show HN: Cosh – concatenative command-line shell

Post by yesenadam » Tue, Jan 17, 2023, 3:21 PM UTC

cmrdporcupine wrote: post #10

yesenadam wrote: post #6

Earlier quoted context omitted.

It appears to be extremely similar to Forth, surprisingly. The docs sections on Variables, Functions, Loops, at least, are all pretty much exactly Forth. the docs: https://github.com/tomhrr/cosh/blob/main/doc/all.md

That's specified right in the article title. The "concatenative" language family includes Forth, but also PostScript, Joy, etc. Languages in which expression reduction is expressed concatenatively via e.g. a stack, RPN syntax, etc. Consistent and powerful and terse, but IMHO hard to read. I think it's a great idea for a shell/script language, maybe, but not universally easily readable.

Post by recuter » Tue, Jan 17, 2023, 4:08 PM UTC

Post by tsegratis » Tue, Jan 17, 2023, 4:47 PM UTC

tomhrr wrote: post #5

KMnO4 wrote: post #3

Seems interesting, but I’m already lost at the first example: lsr; [test m] grep; [f I’m guessing the lsr is a recursive ls, and presumably map is a HOF (functional) map. I know what grep means. So that means “test” and “data” are strings, and I have no idea what “m” is for. And “f Perhaps it’s more parseable to someone who speaks lisp, but I still think not having clear (simple) examples is a nonstarter for a projec…

The 'sh' command that it corresponds to is above it: find . -iname '*test*' -print0 | xargs -0 grep data but possibly a bad assumption on my part that the mapping was clear. In any event, 'm' is for regex string matching, and 'f<' is for reading a file into a generator (basically an iterator over the lines in the file). It's a good point that more, simpler examples would help.

Post by etatoby » Tue, Jan 17, 2023, 5:57 PM UTC

Post by LorenDB » Tue, Jan 17, 2023, 6:11 PM UTC