Reference card

Keywords

abs	cor	ej	gtime	like	mins	prev	scov	system	wavg
acos	cos	ema	hclose	lj ljf	mmax	prior	sdev	tables	where
aj aj0	count	enlist	hcount	load	mmin	rand	select	tan	while
ajf ajf0	cov	eval	hdel	log	mmu	rank	set	til	within
all	cross	except	hopen	lower	mod	ratios	setenv	trim	wj wj1
and	csv	exec	hsym	lsq	msum	raze	show	type	wsum
any	cut	exit	iasc	ltime	neg	read0	signum	uj ujf	xasc
asc	delete	exp	idesc	ltrim	next	read1	sin	ungroup	xbar
asin	deltas	fby	if	mavg	not	reciprocal	sqrt	union	xcol
asof	desc	fills	ij ijf	max	null	reval	ss	update	xcols
atan	dev	first	in	maxs	or	reverse	ssr	upper	xdesc
attr	differ	fkeys	insert	mcount	over	rload	string	upsert	xexp
avg	distinct	flip	inter	md5	parse	rotate	sublist	value	xgroup
avgs	div	floor	inv	mdev	peach	rsave	sum	var	xkey
bin binr	do	get	key	med	pj	rtrim	sums	view	xlog
ceiling	dsave	getenv	keys	meta	prd	save	sv	views	xprev
cols	each	group	last	min	prds	scan	svar	vs	xrank

By category

control	do, exit, if, while
env	getenv, gtime, ltime, setenv
interpret	eval, parse, reval, show, system, value
io	dsave, get, hclose, hcount, hdel, hopen, hsym, load, read0, read1, rload, rsave, save, set
iterate	each, over, peach, prior, scan
join	aj aj0, ajf ajf0, asof, ej, ij ijf, lj ljf, pj, uj ujf, wj wj1
list	count, cross, cut, enlist, except, fills, first, flip, group, in, inter, last, mcount, next, prev, raze, reverse, rotate, sublist, sv, til, union, vs, where, xprev
logic	all, and, any, not, or
math	abs, acos, asin, atan, avg, avgs, ceiling, cor, cos, cov, deltas, dev, div, ema, exp, floor, inv, log, lsq, mavg, max, maxs, mdev, med, min, mins, mmax, mmin, mmu, mod, msum, neg, prd, prds, rand, ratios, reciprocal, scov, sdev, signum, sin, sqrt, sum, sums, svar, tan, var, wavg, within, wsum, xexp, xlog
meta	attr, null, tables, type, view, views
query	delete, exec, fby, select, update
sort	asc, bin binr, desc, differ, distinct, iasc, idesc, rank, xbar, xrank
table	cols, csv, fkeys, insert, key, keys, meta, ungroup, upsert, xasc, xcol, xcols, xdesc, xgroup, xkey
text	like, lower, ltrim, md5, rtrim, ss, ssr, string, trim, upper

.Q.id (sanitize), .Q.res (reserved words)

Operators

.	Apply, Index, Trap, Amend			@	Apply At, Index At, Trap At, Amend At
$	Cast, Tok, Enumerate, Pad, mmu
!	Dict, Enkey, Unkey, Enumeration, Flip Splayed, Display, internal, Update, Delete, lsq
?	Find, Roll, Deal, Enum Extend, Select, Exec, Simple Exec, Vector Conditional
+ - * %	Add, Subtract, Multiply, Divide
= <> ~	Equals, Not Equals, Match
< <= >= >	Less Than, Up To, At Least, Greater Than
| &	Greater (OR), Lesser, AND
#	Take, Set Attribute			_	Cut, Drop	:	Assign
^	Fill, Coalesce			,	Join	'	Compose
0: 1: 2:	File Text, File Binary, Dynamic Load
0 ±1 ±2 ±n	write to console, stdout, stderr, handle n

Overloaded glyphs

Iterators

maps accumulators ' Each, each, Case /: Each Right / Over, over ': Each Parallel, peach \: Each Left \ Scan, scan ': Each Prior, prior

Execution control

.[f;x;e] Trap : Return do exit $[x;y;z] Cond @[f;x;e] Trap-At ' Signal if while

Debugging

Other

` pop stack :: identity \x system cmd x . push stack generic null \ abort global amend \\ quit q set view / comment

() precedence [;] expn block {} lambda ` symbol (;) list argt list ; separator `: filepath ([]..) table

Attributes

g grouped p parted s sorted u unique

Set Attribute

Command-line options and system commands

file
\a	tables	\r	rename
-b	blocked	-s \s	secondary processes
\b \B	views	-S \S	random seed
-c \c	console size	-t \t	timer ticks
-C \C	HTTP size	\ts	time and space
\cd	change directory	-T \T	timeout
\d	directory	-u -U \u	usr-pwd
-e \e	error traps	-u	disable syscmds
-E \E	TLS server mode	\v	variables
\f	functions	-w \w	memory
-g \g	garbage collection	-W \W	week offset
\l	load file or directory	\x	expunge
-l -L	log sync	-z \z	date format
-o \o	UTC offset	\1 \2	redirect
-p \p	listening port	\_	hide q code
-P \P	display precision	\	terminate
-q	quiet mode	\	toggle q/k
-r \r	replicate	\\	quit

system
Command-line options, System commands, OS commands

Datatypes

Basic datatypes n c name sz literal null inf SQL Java .Net ------------------------------------------------------------------------------------ 0 * list 1 b boolean 1 0b Boolean boolean 2 g guid 16 0Ng UUID GUID 4 x byte 1 0x00 Byte byte 5 h short 2 0h 0Nh 0Wh smallint Short int16 6 i int 4 0i 0Ni 0Wi int Integer int32 7 j long 8 0j 0Nj 0Wj bigint Long int64 0 0N 0W 8 e real 4 0e 0Ne 0We real Float single 9 f float 8 0.0 0n 0w float Double double 0f 0Nf 10 c char 1 " " " " Character char 11 s symbol ` ` varchar 12 p timestamp 8 dateDtimespan 0Np 0Wp Timestamp DateTime (RW) 13 m month 4 2000.01m 0Nm 14 d date 4 2000.01.01 0Nd 0Wd date Date 15 z datetime 8 dateTtime 0Nz 0wz timestamp Timestamp DateTime (RO) 16 n timespan 8 00:00:00.000000000 0Nn 0Wn Timespan TimeSpan 17 u minute 4 00:00 0Nu 0Wu 18 v second 4 00:00:00 0Nv 0Wv 19 t time 4 00:00:00.000 0Nt 0Wt time Time TimeSpan

Columns: n short int returned by type and used for Cast, e.g. 9h$3 c character used lower-case for Cast and upper-case for Tok and Load CSV sz size in bytes inf infinity (no math on temporal types); 0Wh is 32767h

RO: read only; RW: read-write

Other datatypes 20-76 enums 77 anymap 104 projection 78-96 77+t – mapped list of lists of type t 105 composition 97 nested sym enum 106 f' 98 table 107 f/ 99 dictionary 108 f\ 100 lambda 109 f': 101 unary primitive 110 f/: 102 operator 111 f\: 103 iterator 112 dynamic load

Above, f is an applicable value.

Nested types are 77+t (e.g. 78 is boolean. 96 is time.)

Cast $: where char is from the c column above char$data:CHAR$string

dict:`a`b!…
table:([]x:…;y:…)
date.(year month week mm dd)
time.(minute second mm ss)
milliseconds: time mod 1000

Namespaces

.h (markup)

HTTP, markup and data conversion.

.j (JSON)

De/serialize as JSON.

.m (memory backed files)

Memory backed by files.

.Q (utils)

Utilities: general, environment, IPC, datatype, database, partitioned database state, segmented database state, file I/O, debugging, profiling.

.z (environment, callbacks)

Environment, callbacks