Glossary

q).qi.path (`data;"HDB";2026.01.01)
`:data/HDB/2026.01.01

q).qi.spath ("data";`WDB;"2026.01.01")
"data/WDB/2026.01.01"

q).qi.ospath `tp`logs`tp1
"tp\logs\tp1"

q).qi.exists `:somefile
0b
q).qi.exists (`:data;"hdb";.z.d)    / uses .qi.path
1b

q).qi.ensuredir "data/wdb/2026.05.01"

.event.addhandler[`.z.pc;`myportclose]

q).cron.add[`cleanup;.z.p+00:10;01:00]   / run hourly, starting in 10m

q).ipc.conn[`tp1]
8i
q).ipc.conn[`tp1]
8i						/ re-uses if already open

q).log.info"testing"
2026.03.13D15:18:34.605564000 info 0 testing
q).log.error ("this is bad";`arg1`arg2!("yes";string .z.d))
2026.03.13D15:19:10.920591000 error 0 yes 2026.03.13 this is bad

q).log.setlevel`info

q).log.setformat`plain
q).log.info"this is a test"
2026.03.13D15:22:03.035220000 info 0 this is a test
q).log.setformat`logfmt
q).log.info"this is a test"
ts=2026.03.13D15:22:14.375892000 lvl=info h=0 msg="this is a test"
q).log.setformat`json
q).log.info"this is a test"
{"ts":"2026.03.13D15:22:24.398116000","lvl":"info","h":"0","msg":"this is a test"}

q).log.setformat`logfmt
q).log.usefields`pid`user`heap!(.z.i;{.z.u};{.Q.w[]`heap})
q).log.info"last test"
ts=2026.03.13D15:24:04.165223000 lvl=info h=0 pid=43047 user=kieran heap=67108864 msg="last test"