Out of curiosity, can anyone explain the attributes overhead as
explained in the Abridged Q Language Manual? Does anyone know what the
4*u+1 is? for parted and grouped? (I know the 4byte should be probably 8
bytes after 3.0) example overhead `s#2 2 3...
Something worth adding to the previous answers: If you can transform
your filter into a table then the select is much easier. To illustrate
q)t:flip `date`data!(2023.05.20 2023.05.20 2023.05.20 2023.05.19
2023.05.19 2023.05.19;`a`c`b`b`b`c) q)t date ...
I use kdb studio to test, debug and develop code and IntelliJ as an
editor. I like IntelliJ because you can easily search for function
usage, jump to definitions etc. It's great when reading code. It also
has a kdb analyst and q plugin so you can act...