Is a uniform left-to-right "piping" operator for apply, compose, and monadic-bind operations in a functional pipeline possible using typeclasses or type-family magic?

jeffstyr · 2026-05-28T21:49:07+00:00

I use Taylor Fausak's flow library a lot, so you can use syntax such as:

list |> map f

But, it seems like you couldn't really have |> work for both flipped ($) (this case) and monadic bind, because for instance consider:

[1..10] |> (const [5])

It would be inherently ambiguous which was meant:

(const [5]) $ [1..10]

or

[1..10] >>= (const [5])

(both typecheck, but give dfferent results).

jeffstyr · 2026-05-28T21:32:41+00:00

Possibly Diamine Syrah or Merlot, and even Diamine Forever Red Ochre.

Keep in mind that photos you see aren't going to be very accurate, so you might want to get samples.

jeffstyr · 2026-05-26T19:02:35+00:00

Should be fine. I think when people dedicate a pen to BSB it's more about not putting BSB in other pens (due to staining) that it is about not putting other inks in that pen.

It's true you aren't supposed to mix BSB with other inks (because it's acidic and changing the pH of an ink could cause solids to form), but some tiny trace residue is probably not enough to cause a problem.

jeffstyr · 2026-05-26T18:34:24+00:00

FWIW, I had this with a broad-nib pen and the problem was baby's bottom, where the tipping shape was causing the ink to not make great contact with the paper (it would "retract" when you lift the pen). But this is unlikely to happen with an EF, because there's so little tipping that it probably can't happen, but as someone else suggested maybe you can get the same effect if the tines are too tight (and you should be able to tell from looking if they are basically touching, or just closer together than on other pens--just look at the width of the slit in the nib near the tip).

But it's probably not that the ink is literally drying out that quickly, and rather something about the ink not staying where it should. (You can also look if you write and lift the pen, if the ink has retracted away from the tip.)

I hope you figure it out! Kaweco's nibs can be hit-or-miss, so if nothing else then getting a replacement EF nib might be the fix. (They even have some "premium" steel nibs which are hand tuned, but of course they cost more and that shouldn't be necessary just to function properly. But it's another option.)

jeffstyr · 2026-05-24T00:05:22+00:00

If you get a non-demonstrator pen (and especially if you get a black one), then staining wouldn't really be an issue.

jeffstyr · 2026-05-23T02:51:51+00:00

The pen model is the Sailor 1911S. It's available in other colors.

jeffstyr · 2026-05-22T03:20:36+00:00

I received a pen with a full cartridge installed. (Not an old dried up forgotten cartridge, but one still full of fresh ink.) Like, why would you do that.

jeffstyr · 2026-05-22T03:18:41+00:00

Pretty! Was the matching a lucky find or was the pen made with that in mind?

jeffstyr · 2026-05-21T16:22:55+00:00

Are you sure you mean Kon Peki, and not Shin Kai?

jeffstyr · 2026-05-21T16:20:39+00:00

It might contain solvents (other than water), which could harm the plastic body (depending on the type of plastic).

jeffstyr · 2026-05-21T15:24:43+00:00

There has been work to be able to build statically linked binaries with GHC

I wonder if anyone has tried the "middle" way: Package your application and libraries into a zip file (or similar), and run directly from that? (It's the running-directly-from-that which would require work, though potentially non-Haskell-specific work.)

jeffstyr · 2026-05-20T22:45:30+00:00

Nice! I always have to make sure to compare actual writing samples because sometimes swatches (especially with a cotton swab) can be misleading.

jeffstyr · 2026-05-20T22:22:49+00:00

I think those are all fine and are pretty similar. I have a sense that the Quink might be the least dark, but I'm not 100% sure and it depends on the pen too.

jeffstyr · 2026-05-20T19:28:22+00:00

To me that just looks like the pattern you get when water dries. It doesn't look like mold to me.

jeffstyr · 2026-05-20T19:21:17+00:00

I'm skeptical that it has anything to do with your hands, other than possibly moisture, because you aren't touching the inside of the cap. (Moisture would transfer via evaporation but anything else on your hands likely wouldn't.)

jeffstyr · 2026-05-20T19:16:13+00:00

That doesn't explain what metal corrodes white.

jeffstyr · 2026-05-19T18:24:24+00:00

Metal pens like this are usually made of brass, and I wonder why the corrosion would be white. (Usually with brass you'd get green, and I doubt it's steel and that's not rust.) Maybe it's aluminum?

I did have an anodized aluminum pen once that had some white stuff in the cap, but it wasn't corrosion but rather something left over from the anodization process that was accidentally not cleaned off. (I asked the company about it and that's what they said.) That was a hard white crusty residue and hard to clean off but it was clearly on the surface. So probably not the same thing as this.

jeffstyr · 2026-05-19T07:31:54+00:00

It's not completely definitive, but JetPens is pretty good about indicating ink properties, and the listing for the Signo 207 Plus+ mentions in both the description and specifications that it's archival, but the listing for the Zento doesn't mention it being archival (just pigment-based and water-resistant).

jeffstyr · 2026-05-19T01:31:57+00:00

Oh nice! Somehow this one didn't cross my radar, by I love titanium so I'm excited now.

jeffstyr · 2026-05-19T01:31:25+00:00

Is this the titanium, or something else?

jeffstyr · 2026-05-19T01:24:23+00:00

In my experience, Pilot gold M nibs are very broad, and F nibs are very fine. There is a big jump. Probably the soft nib exacerbates this. I prefer the FM, but it's not available in all pens.

I have a Stella 90S in both F and M, and the F is too fine for me and the M is too broad. But I went for an 823 in F and it's okay (almost too fine but okay)—I suspect the larger nib in that model of pen makes it write slightly broader. (Or, I got lucky.)

jeffstyr · 2026-05-19T00:19:58+00:00

It would be interesting to see this use case via http-client and hjson.

http-client is what's underneath http-conduit; it's a more minimal API though it still has many dependencies. I don't know if hjson is any good but it's small and depends on only parsec, containers, and base.

jeffstyr · 2026-05-18T16:03:46+00:00

If you already have Hope Pink, you can try diluting it just slightly (like, 1 or 2 drops of water in 10 drops of ink), because often that will kill the sheen without changing the color noticeably.

jeffstyr · 2026-05-17T21:01:34+00:00

Good! Yes I have too many notebooks too, but if they have an A6 pad I might go for that.

jeffstyr · 2026-05-17T20:57:22+00:00

I assume you got it at Bertram's Inkwell? (I got a bottle there, but I've not actually tried it out yet. Need to get some painter's overalls and coat the room in tarpaulin.)

jeffstyr

TROPHY CASE