// The primitives of RASP (Restricted Access Sequence Processing Language):
tok:{x}
ind:{til count x}
len:{(count x)#count x} // no atoms in RASP
sel:{if[0>type x;x:(count y)#x];if[0>type y;y:(count x)#y];x z\:/:y}
agg:{0^avg each y where each x}
// Higher level operations expressible with the primitives:
selector_width:{sum each x y}
Flip:{sel[ind x;len[x]-ind[x]+1;=]}
rev:{agg[Flip x;tok x]}
same_tok:{sel[tok x;tok x;=]}
select_all:{sel[(count x)#1;(count x)#1;=]}
// Example output:
q)rev"foo"
111 111 102f
q)"c"$rev"foo"
"oof"
q)Flip"foo"
001b
010b
100b
q)tok"foo"
"foo"
q)ind"foo"
0 1 2
def sort (vals ,keys , assume_bos=False ) {
smaller = select (keys ,keys ,<) or
( select (keys ,keys ,==) and
select ( indices , indices ,<) ) ;
num_smaller =
selector_width ( smaller ,
assume_bos=assume_bos ) ;
target_pos = num_smaller if
not assume_bos else
(0 if indices==0 else ( num_smaller +1) ) ;
sel_new =
select ( target_pos , indices ,==) ;
sort = aggregate ( sel_new , vals ) ;
}
Date
Monday, February 13, 2023 - 9:30am ET / 2:30pm UK
// Second Monday of every month
Attendees
Meeting notices
FINOS Project leads are responsible for observing the FINOS guidelines for running project meetings. Project maintainers can find additional resources in the FINOS Maintainers Cheatsheet.
All participants in FINOS project meetings are subject to the LF Antitrust Policy, the FINOS Community Code of Conduct and all other FINOS policies.
FINOS meetings involve participation by industry competitors, and it is the intention of FINOS and the Linux Foundation to conduct all of its activities in accordance with applicable antitrust and competition laws. It is therefore extremely important that attendees adhere to meeting agendas, and be aware of, and not participate in, any activities that are prohibited under applicable US state, federal or foreign antitrust and competition laws. Please contact legal@finos.org with any questions.
FINOS project meetings may be recorded for use solely by the FINOS team for administration purposes. In very limited instances, and with explicit approval, recordings may be made more widely available.
Agenda
(5 min) Convene, roll call, welcome new people.
Display FINOS Antitrust Policy summary slide
Review Meeting Notices (see above)
(5 min) Approve previous meeting minutes.
(5 min) kdb Studio Updates
(20 min) Anaconda for kdb Ecosystem.
qpackage available.q.(5 min)
verbose.qstarting point: Initial commit for verbose.q #87readcsvinstead of0:.kdbcommunity may be resistant.qitself is syntactic sugar on top ofk.?operator can be used forselectand symbol enumeration which is very different!(15 min) "Thinking Like Transformers" / RASPy analog for k/q ?
WebEx info
Webex
Dial-in and Project Materials