Topic Index

128-bit Floating Point······· hexf
1752························· British_Calendar_Act_1751 date days gcr
2-adic numbers··············· bf
32-bit floating point········ f32
3D graphics·················· turtle
3N+1 sequence················ osc
91··························· m91
@···························· at
abacus······················· mayan
ABC·························· baby
absolute zero················ invr ratsum
abstraction·················· avl dfspan earthlings humour
accumulator·················· factorial fibonacci list
ACE·························· baby
Ackermann's function········· balm bfack hexdump joy lisp mdf ticks
addition····················· colsum
adjacency matrix············· Graphs
adjacent 1s·················· xtabs
AGM·························· see arithmetic-geometric mean
aide-mémoire················· refcard
Algorithm X·················· X
align text··················· just justify
ambivalent··················· ambiv
Anaglyph····················· turtle
ancestor space··············· refpath up
anti-gravity················· malaise
APL'88······················· mean
APL385 Unicode··············· xhtml
applicative·················· joy
apportionment················ apportion
Arithmetic Boundary Checking· abc
arithmetic-geometric mean···· limit
array, nested················ disp easter enlist int
assembler···················· baby
assignment··················· apportion assign X
assignment, destructive······ alists hexdump sam select wpath
assignment, indexed·········· maze select wpath
association list············· alists mns
Asteroids···················· life
astronomy···················· mayan
at operator·················· at
attributes··················· attrib
autoformat··················· test
Baby························· baby
bags························· bags
balanced ternary············· bt esh JitSub ratrep ratsum stamps
balanced tree················ see binary search tree
Base64 encoding·············· base64
Bayes formula················ bayes
Beano························ pigeons
Beast, number of the········· rational
BFS·························· see breadth-first search
BIDMAS······················· parse
bijective numeration········· adic
binary······················· ary
binary search················ bsearch
binary search tree··········· avl BST redblack sbst splay
binding strength············· parse
binomial····················· nats
birthday····················· birthday
biscuit, ginger·············· beyond
blanks······················· Blank_removal dab deb dlb dmb dtb dxb mtrim vtrim
boolean functions············ logic truth_tables
border······················· box
bottom ⊥····················· baby declarative
boundary····················· abc kcell ksphere
box·························· box disp display draw
box-drawing characters······· box dft disp display draw keyboards select
····························· wrapnote
boxing······················· box disp display dsp
Brainfuck···················· bf bfack mac
breadth-first search········· bfs path search span trav
BST·························· see binary search tree
Bunda-Gerth parser··········· kk parse
Burgis & Colbourne··········· race
Burroughs B1700·············· bt
cache························ memo
calendar····················· British_Calendar_Act_1751 cal date Dates
····························· Gregorian_calendar mayan
calibration·················· wsreq
canon paschalis·············· easter
cans························· decay
capitalisation··············· von
card deck···················· ripple
cartesian coordinates········ polar
case, upper or lower········· lcase
cash prize··················· osc
cast························· int
Catalan number··············· BST
category····················· kind
cellular automaton··········· life
Cetacea······················ earthlings
charisma····················· charisma
checksum····················· chksum
chess puzzle················· kt queens queensX
Cholesky decomposition······· Cholesky
classification, name········· ncpath
closure······················ cf cfract lisp memo ratsum
Co-dfns······················ tacit
co-operator·················· case co_ops cond for fork lof of vof
coding, fibonacci············ fibonacci
coins························ decay
Colemak······················ dvorak
Collatz sequence············· osc
Colossus····················· baby
colour, changing············· colour_change
column sum··················· colsum
combination·················· cmat rr
combinator··················· dft
comment removal·············· rmcm
compare arrays··············· le
compare functions············ fndiff
compare namespaces··········· refmatch
compare workspaces··········· wsdiff
complex numbers·············· cxdraw polar roots
component file··············· filefind
compression·················· dab Data_compression deb dlb dmb dtb dxb nspack
····························· pack pack4 packB packD packH packN packQ packR
····························· packS packT packU packX packZ squeeze vtrim
computer programmers········· nats staples
computer, first·············· baby
concatenative················ joy
conditional operator········· case cond else for lof logic of until while
cons························· list
consciousness················ earthlings muson
continuation-passing style··· mac
continued fraction··········· cfract fibonacci
convolution·················· xtimes
coordinates·················· polar
cost vector·················· wcost
cover, exact················· X
cows and bulls, game of······ mmind
CPS·························· see continuation-passing style
cross-reference·············· fnrefs
currying····················· parse trav
custom keyboard·············· kbmac
Cut·························· Cut
cylinder····················· life
D-function, test for········· isdfn
DAG·························· scc
data compression············· see compression
data conversion·············· type
date························· Dates days easter Gregorian_calendar mayan
····························· timestamp
debugging···················· tc traj
decay························ decay
decimal (from hex)··········· hex
Decimal Floating Point······· hexf
decimal normalisation········ JitSub
declarative programming······ bfack bt declarative pearly
default display·············· nlines
default left argument········ root
define function·············· din
denotative··················· declarative
depth-first search··········· dfspan le scc trav
derived function············· dft tacit
determinant·················· det
DFS·························· see depth-first search
dictionary··················· alists
difference, functions········ fndiff
dip·························· joy
disassembler················· baby
display (of arrays)·········· box disp display dsp
diversions··················· baby dice draw kt life mayan maze mmind mp3 queens
····························· quzzle ripple roman sudoku sudokuX von
division by ¯1 1+base*⍵······ JitSub
division, fast··············· JitSub
division, long··············· bt nats
do-y function················ do
doors························ charisma
Dragon curve················· turtle
drawing······················ cxdraw
dual························· cxdraw
dup·························· joy
Dvorak······················· dvorak
Dyadic Malaise··············· malaise
E=MC²························ einstein
each························· each
Earthlings··················· earthlings
Easter······················· easter
EDSAC························ baby
EDVAC························ baby
Egyptian fraction············ efract
Eide numbers················· esh ratrep ratsum
EIS·························· see enclose-if-simple
encapsulate function········· rep
enclose-if-simple············ eis
encoding····················· utf8get utf8put
encryption··················· packD
endian······················· hexdump hexf
engineers···················· osc
ENIAC························ baby
enlist······················· avl BST enlist Graphs limit nspack redblack sbst
····························· splay
Entropy······················ shannon
Erasomatic (tm)·············· beyond
error-guard, dynamic········· repl
evaluator···················· lisp
exa-························· nats
exact cover·················· X
experience, near-death······· beyond
expression comparison········ cf cmpx
expression transformation···· avl cmat nats parse tacit
external workspace··········· refws
factorial···················· big factorial lisp nats
Fast Fourier Transform······· xpower xtimes
FFT·························· see Fast Fourier Transform
fibonacci coding············· fibonacci
fibonacci number············· avl cfract cmat dft fibonacci lisp memo nats pow
····························· trav
find························· filefind in
FinnAPL Idiom List··········· bags
fixpoint····················· cxdraw JitSub limit tacit
flip flop (RS)··············· xtabs
flying machine··············· malaise
Flying turtle················ turtle
fold························· foldl
font························· xhtml
fork························· dft fork tacit vof
formatting, functions········ dots refmt rmcm
formatting, trees············ tfmt tnest
Forth························ joy
fractal······················ lsys turtle
FRE·························· see Function Results Edition
fudge factor················· wsreq
function array··············· fnarray fnarray for Function_arrays of rep vof
function inverse············· invr
function power··············· limit pow
Function Results Edition····· cf cfract memo ratsum
function selection··········· for
function trains·············· dft tacit
function, fix················ fix
Functional Kats·············· lsys
functions, list of··········· lof
fuzzy························ dist
Gates, Pearly················ pearly
Gauss-Jordan················· gauss_jordan
Gaussian elimination········· gauss_jordan
Gaussian method·············· det
Gavotte······················ charisma
GCD·························· see greatest common divisor
giga-························ nats
glider······················· life
golden mean·················· cfract fibonacci limit phinary
golfing······················ life
Gosper curve················· turtle
grade························ le ripple
graph························ alists assign bfs dfspan Graphs inslink insnode kt
····························· scc stamps stdists stpath stpaths
graph, planar················ konigsberg
graph, unweighted············ gperm Graphs path remlink remnode search span
graph, weighted·············· Graphs wcost wGraphs wmst wpath wspan
greatest common divisor······ cfract gcd nats rats
Gregorian calendar··········· date gcr Gregorian_calendar
guard························ dice
Gödel, Escher, Bach·········· osc
Haiku························ charisma staples
Hailstone sequence··········· osc
Happy Hacking Keyboard······· dvorak
harpoon gun·················· ksphere
Harvard Mk1·················· baby
hashing······················ chksum
HCF·························· see greatest common divisor
Heaven······················· beyond pearly
Helsingør···················· cond
hexadecimal·················· esh hex hexdump hexf
HHKB························· see Happy Hacking Keyboard
hidden line removal·········· turtle
Hilbert curve················ turtle
Hilbert matrix··············· det gauss_jordan
histogram···················· cmpx easter nicediv
hook························· dft fork tacit
horizontal tabs·············· xtabs
Huffman code················· packH
humour······················· humour
Hungarian method············· assign
hybrid······················· kind
hyperator···················· bf cf cond hyperators
hypercube···················· Graphs kcell
hypersphere·················· kball ksphere
identity operator············ life
IDN·························· see International Day Number
IEEE 754····················· hexf
IEEE 854····················· hexf
IEEE FP precision············ ary gauss_jordan nats
imaginary numbers············ see complex numbers
independent zeros············ assign
index························ in
indexing, array·············· from
infinite precision··········· big colsum nats
information theory··········· shannon
insensitive, case············ lcase
integer······················ int
intellect, human············· staples
International Day Number····· days
interval····················· abc
inverse······················ invr
iota, generialised··········· iotag
is-y function················ do
J···························· pco
JFK Airport·················· pearly
JITS························· see Just-In-Time-Subtraction
Joy·························· joy
Julian calendar·············· Gregorian_calendar
Just-In-Time-Subtraction····· JitSub ratrep
justify text················· just justify Line_vectors
K···························· sudoku
k-adic numbers··············· adic
K-ball······················· kball
K-cell······················· kcell
K-sphere····················· ksphere
Kaliningrad·················· konigsberg
Karabiner···················· kbmac
KDF9························· quotes
keyboard layout·············· dvorak kbmac keyboards
kilo-························ nats
kind························· kind kk
klein bottle················· life
knight's tour················ Graphs kt
Koch curve··················· turtle
Kumquat······················ disp htx
Königsberg··················· konigsberg
L-Systems···················· lsys turtle
lambda expression············ lisp list
lazy evaluation·············· and
LCM·························· see least common multiple
Leamington Spa··············· race
least common multiple········ gcd nats rats
Lempel-Ziv-Welch············· packZ
lexical scan················· tokens
library······················ charisma
life, game of················ Cut life
line list···················· see line vector
line vector·················· justify Line_vectors ltov squeeze unwrap wrap
····························· wrapnote
line-drawing characters······ see box-drawing characters
lines of output·············· nlines
link························· eis
Lisp························· lisp
lists························ alists bf joy list
loaf, slicing················ ksphere
local names·················· mean
location····················· in
look-up table················ alists
loop························· repl
lower case··················· lcase
Lucas numbers················ fibonacci
LZW·························· see Lempel-Ziv-Welch
Mac·························· kbmac
macro························ balm hexdump mac
magic function··············· declarative
Malaise, Dyadic·············· malaise
Manchester computer·········· baby
Mandelbrot set··············· cxdraw
manifolds···················· ksphere life
Mastermind··················· mmind
mathematicians··············· nats packZ staples
maximise····················· assign
maximum, local··············· ksphere
maze························· hampton maze
media player (MP3)··········· mp3
mega-························ nats
memoization·················· memo
merge, workspace············· wsmerge
MESM························· baby
Metacircular················· joy lisp
MIME························· base64
min (workspace)·············· list
mininum spanning tree········ wmst
monad························ scc
monitor······················ mdf tc ticks time wsreq
Morse code··················· morse
MP3 (media player)··········· mp3
MST·························· see minimum spanning tree
multi-graph·················· konigsberg
multiset····················· bags
muscle memory················ dvorak
muse························· muson
music························ mp3
mutual recursion············· see recursion, mutual
möbius strip················· life
N-Queens····················· queens queensX trav X
name classification·········· ncpath
name colouring··············· kind kk
name-clash problem··········· attrib dots find isdfn mdf ticks tree wsdiff
nameclass···················· kind
namespace···················· mns Namespaces
namespace comparison········· refmatch
namespace references········· refpath refs up xrefs
native file·················· file getfile hexdump int putfile
natural number··············· nats
nested array················· see array, nested
nesting store················ quotes
network······················ see graph
Newton-Raphson··············· invr ksphere limit traj
Nicaea, Council of··········· easter
no-result···················· do
non-termination·············· baby declarative
nullary······················ joy
number system················ mayan roman
nuns························· race
offside rule················· hexdump
one-liner···················· rmcm
optimise····················· assign
order (of arrays)············ le
OS X························· kbmac
Oscillate···················· osc
oyster······················· muson
packing······················ nspack pack4 packB packD packH packN packQ packR
····························· packS packT packU packX packZ
palindrome··················· limit limit turtle
parent space················· refpath up
parsing······················ kk list parse tokens unify
partioned reduction·········· pred
partition···················· segs
Pascal's triangle············ cmat
passant, en·················· do
path························· in stdists stpath stpaths wpath
pattern-matching············· bfack bt
Peano curve·················· turtle
pencils······················ beyond decay
pentomino···················· life X
performance·················· cf cmpx mdf ticks time wsreq
permutation matrix··········· pmat
persistent local variable···· memo
pervasive function··········· easter int perv truth_tables
peta-························ nats
Phi·························· see golden mean
phinary number··············· phinary
Pi··························· cfract rational
piano························ ludwig
pick························· in
picnic······················· ksphere
pigeons······················ pigeons
playlist····················· mp3
Poincaré Conjecture·········· ksphere
polar coordinates············ polar
polyhedron··················· turtle
polymorphism················· kk unify
polynomial··················· ratrep xtimes
posh························· ratsum
postage stamps··············· stamps
Postscript··················· joy
power operator··············· pow
prefix agreement············· at
prime number················· factors hexdump pco rats sieve
probability·················· birthday
programmable function keys··· PF_keys
proof, engineer's············ osc
pseudo-graph················· konigsberg
pure function················ baby each gauss_jordan queens sam select
puzzle······················· quzzle
quad-tree···················· pack4
quadratic, real roots of····· roots
quality assurance············ test
Quaternion··················· H turtle
queue························ bfs
quicksort···················· le
quickstep···················· dvorak
QWERTY······················· dvorak keyboards
r-pentomino·················· life
race························· race
railway diagram·············· file
rational number·············· ary cfract esh rational ratrep rats ratsum
read-eval-print loop········· see REPL
rectangle, golden············ phinary
recursion, mutual············ see mutual recursion
red-black trees·············· redblack
redo························· UndoRedo
reduction···················· acc foldl
reference card··············· refcard
references, function········· fnrefs
references, workspace········ refws
refs························· refs
remote execution············· refws
REPL························· din esh hexdump mmind repl
Representatives, House of, US apportion
rewriting···················· bf lsys
riffle shuffle··············· ripple
RLE·························· see run-length encoding
roman numerals··············· roman
Round-robin tournament······· rr
run-length encoding·········· packR
scalar-wise·················· perv
scan operators··············· scan
Scheme······················· lisp
sea monster, scary··········· dft
seawater····················· ksphere muson
select and modify············ sam
select operator·············· case
selfie······················· kk
semicolon separator·········· at
sequence····················· cfract k6174 osc to traj
sequential test·············· and
session input················ din
Setun computer··············· bt
Shannon-Fano················· packS
sharing, array··············· pack
shell························ esh repl repl
shipping regions, UK········· uksfr
shortlex····················· adic
shuffle······················ ripple
SICP························· lisp
Sierpinski triangle·········· turtle
sieve························ sieve
Sigma APL···················· at
Signum difference············ abc
simple-array-wise············ saw
skewed four·················· ratrep ratsum
Snowflake curve·············· turtle
sort························· le
sound bite··················· declarative humour
soup························· decay soup
spaces······················· see blanks
spanning tree················ dfspan span stdists stpath stpaths wmst wspan
sphere······················· kball ksphere
split························ segs
squab························ pigeons
SSEM························· baby
stack························ joy quotes
standard deviation··········· mean
staples······················ staples
stela························ mayan
stencil······················ life
stepping····················· to
Stereographic image·········· turtle
string comparison············ dist
string replacement··········· fnrepl ss ssmat ssword subs
string search················ find
Strongly connected components scc
stuff························ alists Data_compression dots le packN staples
stupid questions············· declarative
subset······················· subvec
substitution················· ss ssmat ssword subs
subtraction, just-in-time···· JitSub ratrep
subvector···················· subvec
sudoku, game of·············· sudoku sudoku_bfs sudokuX X
suffix trie·················· packZ
sum·························· colsum
swap························· joy
swons························ joy
symbol table················· alists
syntax······················· attrib
tab expansion················ xtabs
tacit definition············· tacit
tag, XML····················· htx
tail recursion··············· bfack factorial fibonacci gcd
TAO·························· see Total array ordering
tape························· bf dsp parse
tera-························ nats
term rewriting··············· bf lsys
TERNAC······················· bt
ternary······················ ary bt
text························· Blank_removal Data_compression Line_vectors segs
····························· unwrap words wrap wrapnote
text file···················· getfile putfile
time························· timestamp
timing······················· cf cmpx mdf ticks time
toffee-wrapping paper········ turtle
topology····················· abc ksphere
torus························ ksphere kt life
Total array ordering········· le
trace························ tc
tradfn······················· ambiv
trailing blanks·············· mtrim
trains······················· dft tacit
trajectory··················· traj
transitive closure··········· Graphs scc wrap
tree························· avl dft redblack sbst splay tfmt tnest trav Trees
····························· tview
tree searching··············· kt queens
truth tables················· logic truth_tables
tuple························ scc
turing complete·············· baby bf
Turing tape·················· balm bf parse
Turtle graphics·············· lsys turtle
type························· type
type conversion·············· int
type notation················ avl BST foldl sbst trav
unary························ adic joy trav
under························ cxdraw
undo························· UndoRedo
Unicode······················ getfile iotag putfile utf8get utf8put xhtml
unification·················· unify
unit circle·················· cxdraw
unit sphere·················· ksphere
unit testing················· test
UNIVAC······················· baby limit
unsigned····················· int
upper case··················· lcase
UTF-8························ utf8get utf8put xhtml
variable-wise················ vwise
vector of functions·········· vof
vector-wise·················· rows
vegan························ soup
vigesimal number system······ mayan
Warndorff's rule············· kt sudoku_bfs
whales······················· earthlings
where clause················· at
white dots··················· dots hexdump
wondrous number·············· osc
word ladder·················· Graphs
words························ segs wrap wrapnote
workspace···················· refws tree Workspaces wsdiff wsmerge
wrapping, words·············· Line_vectors unwrap
www.dyalog.com··············· xhtml
XML·························· htx
xutils, ss··················· ss ssmat ssword
Y combinator················· lisp
yotta-······················· nats
YouTube······················ dvorak life limit lisp queens sudoku sudoku_bfs
····························· trav
zetta-······················· nats
Zuse Z3······················ baby
Ø···························· see golden mean
⍳, generalised··············· iotag
⍺th root····················· root
⎕AT·························· attrib
⎕DR·························· type
⎕ML·························· cmat cmpx limit logic mns
⎕NC, extended················ ncpath
⎕SE·························· din
⎕SIZE························ attrib
⎕WX·························· refs
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