Copyright (c) 1989 1990, Roger K.W. Hui & K.E. Iverson Copyright (c) 1990-1993, Iverson Software Inc. All Rights Reserved. J Implementation Status (Version 7 - 14 November 1993) System Limits: Array rank <: 127 Comparison tolerance <: 2^_34 Object size < 65536 bytes [PC AT only] Workspace size < 640 Kbytes [PC AT only] Machines to which J has been ported: Acorn Archimedes AT&T 3B1 Apple Macintosh Atari ST DECsystem 5500 DEC VAX (Ultrix and BSD UNIX) Interactive 386/ix PC/XT, PC/AT PC/386, PC/486 PC/Windows IBM RISC/6000 MIPS R3000 NeXT Silicon Graphics SGI Irix Sun 3 Sun 386i Sun 4 (SPARC) Not Yet Available: _ __ _. v;.3 v;._3 c. E. p. 1!:0 Changes between Version 2, 1990 8 9 (APL90 Version) and Version 2.7, 1990 10 22 J code size reduced slightly alternatives for national use characters = faster monad -. faster dyad ~. faster ~: faster monad ,. faster ;: rhematic rules re . and : changed e. faster i. faster dyad . cum (gerund from verb) : con (verb from gerund) :: faster u"v rank (like u, but has ranks of v) u&.v under =. indirect local assignment =: indirect global assignment 3!:2 convert from internal representation 5!:0 fix 5!:1 atomic representation 8!:0 8!:1 query/set CGA mode 9!:0 9!:1 query/set random link 9!:4 9!:5 query/set prompt 9!:6 9!:7 query/set box drawing chars 9!:8 9!:9 query/set error msgs 9!:10 9!:11 query/set ) system command names )box removed )prompt removed )reset renamed )sic )rl removed )script profile facility added ATARI ST ported to tutorial faster Changes in Version 2.8, 1990 11 15 ": faster on boxed arrays display faster on boxed arrays 5!:0 string representation inverse 5!:3 string representation 8!:2 8!:3 removed (replaced by DOS facility) 8!:4 8!:5 set screen attributes 8!:7 refresh screen )clear removed (equivalent to 4!:55 (4!:1) 2 3 4 5 ) PC AT simplified session manager PC AT added command line parameter /s Changes in Version 2.9, 1991 2 15 +: monad added *: monad added -: monad added ": dyad added 0: added 1: added m&g f&n faster :: labels adverbs n c, v c, c n, c v derive adverbs 2!:0 WS name class 2!:1 WS name list 2!:2 WS save 2!:4 WS copy 2!:55 WS erase 8!:9 (PC AT) Edit 8!:16 8!:17 (Mac) query/set font attributes 8!:19 (Mac) print screen Macintosh improved user interface PC AT improved user interface 386ix ported to SGI ported to Changes in Version 3, 1991 3 17 [ previously spelt }: ] previously spelt {: . previously spelt .. ` previously spelt . `: previously spelt : : previously spelt :: +/\ invertible -/\ invertible */\ invertible %/\ invertible =/\ invertible ~:/\ invertible +/\. invertible -/\. invertible */\. invertible %/\. invertible =/\. invertible ~:/\. invertible ^~ invertible ,~ invertible ;~ invertible ,:~ invertible |.&:k shift b. boolean m. mean n. normalize s. standard deviation xyz: given names tab treated like space on input Mac resizeable Language Summary Changes in Version 3.1, 1991 5 17 LinkJ m : 1 replaces 1 : m m : 2 replaces 2 : m m : 11 translate to tacit 1!:11 indexed file read 1!:12 indexed file write m. redefined n. redefined s. redefined u . v determinant Changes in Version 3.2, 1991 6 2 A. previously spelt @: C. previously spelt @. !. previously spelt &: ,. ravel items / append lists ; raze / link @. agenda @: at &: appose f. fix [. lev ]. dex m. removed n. removed s. removed proverbs dynamic reference 0!:1 documentation updated Changes in Version 3.3, 1991 6 25 ,. ravel items / append items 0-frames corrected a-trains implemented c-trains implemented Changes in Version 3.4, 1991 7 15 (APL91 Version) NB. implemented National Use Chars implemented (Appendix A of dictionary) Changes in Version 4, 1991 11 23 _: implemented +.y implemented *.y implemented x-.y faster u^:_ implemented u^:_1 linear approximation u^:n dyad changed u^:v changed $: changed |: faster on matrices u .. v implemented u .: v implemented m : 11 string m only m : 12 implemented atom1,:atom2 produces 2 1$atom1,atom2 u/. dyad faster 0{atom returns atom u} changed; old defn is u@i.@}.@$} : (u@i.@$}) u"_ implemented `:1 replaced by u^:v `:4 replaced by m~ `:5 replaced by @. j. implemented r. implemented 4!:0 returns _1 on invalid arguments 5!:4 implemented 9!:10 removed 9!:11 removed )script replaced by 0!:2 )sscript replaced by 0!:3 )off replaced by 0!:55 and Ctrl D Archimedes ported to DECstation ported to MAC removed online dictionary Changes in Version 4.1, 1992 2 2 u . v faster m&, invertible ,&m invertible m&}. invertible 1!:2 (Mac) file type set to TEXT 1!:3 (Mac) file type set to TEXT 1!:12 (Mac) file type set to TEXT ^!.p implemented J source made available Changes in Version 4.2, 1992 3 19 input fixed bug in jgets() input numeric input (in w.c) more robust vz.c enhanced portability in zacosh() J PC386 available test scripts available Changes in Version 5, 1992 6 22 faster >!._ implemented >. faster + faster dyad * faster dyad - faster -: faster %. faster ^ special case in dyad for integer y $ faster dyad ~: faster dyad f/ .g faster dyad +/ .* faster dyad , faster dyad ,. faster dyad # faster dyad #. faster #: faster; fixed bug (#:!.t) f/ faster f/\ faster monad f/\. faster monad {. faster dyad {.!.f implemented }. faster " faster; prefix agreement ? faster monad 5!:4 faster x 6!:2 y implemented Changes in Version 5.1, 1992 7 28 -. faster dyad on strings m :12 returns adverb if y. not in m 5!:5 implemented 9!:2 implemented 9!:3 implemented [: implemented ]: implemented u@n implemented m f. implemented x. y. replaced immediately by referent 2: to 9: implemented trains implemented c1 v c2 J added SYS_DOUBLE J added SYS_GETTOD Changes in Version 5.1a, 1992 8 11 ": fixed bug in ": on real arrays Changes in Version 6, 1992 10 24 = faster monad -. faster dyad ~. faster ~: faster monad : 20 implemented : 21 implemented : 22 implemented u ::v implemented u;.n faster monad 0!:4 implemented 0!:5 implemented 4!:56 implemented 11!:0 implemented 11!:1 implemented u/. faster dyad /: faster \: faster u b. implemented e. faster i. faster input implemented 3r4, 3ad90, 3ar1.5708, 3p4, 3x4, 3b121.12 Changes in Version 6.1, 1992 11 26 % coerced -0 to 0 u^:g implemented !: changed C fn headers for derived fns 0!:2 fixed bugs in profile, Windows, rank n output 0!:3 ditto 0!:4 ditto 0!:5 ditto 2!:2 changed to use maximum precision 2!:3 ditto 4!:55 fixed bug in local names 4!:56 ditto g} implemented i. added support for non-standard MAC floating point formats source jt.h added fl (flag) field to struct V source r.c changed 5!:2 to exploit fl in V source rl.c changed 5!:5 to exploit fl in V source rt.c changed 5!:5 to exploit fl in V Changes in Version 6.2, 1992 12 20 u@n removed D. implemented Changes in Version 7, 1993 11 14 +. bug fix ^: changed [: added t. added T. added : changed 13!:n added locatives added command line changed error display changed