16 Temporal Functions

k9 has functions (within .z) to get the current date and time to various degrees of precision. There are also functions to retrieve partial date and time using dot notation.

date 2001.01.01   .z.d
time 12:34:56.789 .z.t

16.1 .z.[dm] date

These functions retrieve the date as day (d) or month (m) precision.

 .z.d
2020.12.13

 .z.m
2020.12.

16.2 .z.[hrstuv] time

These functions retrieve the time at hour (h), minute (r), second (s), millisecond (t), microsecond (u), or nanosecond (v) precision.

 .z.h
11
 .z.r
11:25
 .z.s
11:25:16
 .z.t
11:25:16.842
 .z.u
11:25:17.491362
 .z.v
11:25:18.186360064

One could use the current time commands to measure run time but typically this is done via \t

 t1:.z.v;(_2e8)rand 1.;t2:.z.v;t2-t1
00:00:00.609207008

\t (_2e8)rand 1.
610

16.3 Temporal dot functions

These functions use dot notation to retrieve partial date and times.

 now:.z.v;now
11:27:18.049558016
 now.h
11
 now.r
11:27
 now.s
11:27:18
 now.t
11:27:18.049
 now.u
11:27:18.049558
 now.v
11:27:18.049558016