I should pretend I designed this feature intentionally, but in reality I just realized that because something/someprop.10 gives us the first 10 items from each group, you can also truncate each group to 10 items in place, like this: something/someprop|of=10

The Gallery now includes a DACTAL Sudoku solver! Or, more accurately, a Sudoku solution-process revealer. dactal.org/dactal.html?...

This may not interest you until you suddenly hit a case where you need it, but you can now short-circuit a traverse operation when it gets its first results, like this: some data.<(.some expensive subquery) instead of running the subquery N times only to throw away N-1 of the results.

DACTAL,ATProto.fun

A start/labeling operation can append to the existing list with ?label=+(subquery) ??label=+(subquery) And a start operation can use the value ONLY as a reference with =label =type Thus this form for setting a label if it isn't already set: ??district size=(=district size;~1000)

Sometimes you want (or just need) the results of another query in the middle of the one you're writing. Highlight the subquery and hit Command-U to unpack it.

Saved relative queries let you encapsulate complexity, like AEIODLT .possible words .by added letter And now you can decapsulate it again with command-I (for Inline).

Also: added regex filtering. And then, only a little later, added documentation of regex filtering.

If anybody can vibe-code embryonic ideas into slick apps, we're gonna get a lot of slick apps sealed airlessly around ideas that never got a chance to become. I want the opposite of that, unslick explorers of exposed exologic. We only start at the beginning. dactal.org/Scrabble.html

Yesterday's excellent tiny realization: subtractive traversal is a set-disjunction operation, but subtractive traversal with duplicates is itemwise removal. ...x=(1,1,2,2,3,3),y=(2) .x,-y → 1,3 ..x,y → 1,1,2,3,3

On one hand, we already know all the prime numbers below 1000. On the other, here's the Sieve of Eratosthenes in a DACTAL query. dactal.org/dactal.html?...

I give you your carets back. ^ and ^^ for comments have been replaced by ??? for notes, so ^ is no longer a reserved character. ??? your notes here Notes in DACTAL are a null operation, not meta-text, which has some cool implications that I haven't thought of yet.

I moved the inline-math handling to a more sensible place in the resolution process, so now you can use it in traversal, grouping, sorting, or either form of annotation.

Realized and fixed an early-implementation laziness that evaluated :x=y as :(.x:@1:=y) instead of :(.x:=y)

Oh look, a Wordle solver that fits (kinda) in a URL. dactal.org/dactal.html?...

To go with /@x, which groups consecutive sequences with shared x properties, you can now also do /@@y to group sequences that start with each occurrence of y. E.g grouping streams into listening sessions broken by gaps of more than 10 minutes between songs:

Realized that the recently-added |x@ shortcut, for annotating a list of items with their list indexes, was actually the beginning of the missing feature for doing running ranks/counts/totals. e.g. cumulative duration: tracks2||cumulative duration=@@duration dactal.org/dactal.html#...

Huh, worked out the Wordle logic in DACTAL form.

The new ?? label operation has the same labeling options as a ? start operation, but relative to, and without changing, the current list: tracks|others=(??this .artist.tracks:-(this)) This replaces the more limited special-casing of "=_" in starts: tracks|others=(?this=_ .artist.tracks:-(this))

Today in obsessive buffing of rough spots: Filter negation is now done with -, instead of !. tracks:-=Amaranth This was the only use of ! as a suboperator, which frees it up to be the repeat operator, instead of ??. messages._,replies!

Today's tiny DACTAL tweak that probably affects nobody: in an aggregation, semicolons explicitly identify aggregators. So this query is a count of counts; the first "count" is a property (of groups), the second "count" is the aggregator. tracks/artist...count;count

There have been many small improvements to DACTAL recently, all of them described in the also-much-improved interactive manual at dactal.org.

dactal.org now starts with a little explanation of what this is before cannonballing into the syntax.