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j 音标拼音: [dʒ'e] n. 字母 j字母 jJ n 1: a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second [ synonym: { joule}, { J}, { watt second}] 2: the 10th letter of the Roman alphabet [ synonym: { J}, { j}] J \ J\ ( j[= a]). J is the tenth letter of the English alphabet. It is a later variant form of the Roman letter I, used to express a consonantal sound, that is, originally, the sound of English y in yet. The forms J and I have, until a recent time, been classed together, and they have been used interchangeably. [ 1913 Webster] Note: In medical prescriptions j is still used in place of i at the end of a number, as a Roman numeral; as, vj, xij. J is etymologically most closely related to i, y, g; as in jot, iota; jest, gesture; join, jugular, yoke. See { I}. J is a compound vocal consonant, nearly equivalent in sound to dzh. It is exactly the same as g in gem. See Guide to Pronunciation, [ sect][ sect] 179, 211, 239. [ 1913 Webster] A derivative and redesign of { APL} with added features and
control structures. J is { purely functional} with { lexical
scope} and more conventional control structures, plus several
new concepts such as { function rank} and { function arrays}. J
was designed and developed by Kennneth E. Iverson and Roger
Hui . J uses only the {ASCII}
character set but has a spelling scheme that retains the
advantages of {APL}'s special alphabet. J is a conventional
procedural programming language but can be used as a {purely
functional} language.
Version 4.1 for {MS-DOS}, Sun, Mac, Archimedes. Source
available in C from {Iverson Software}, 1 (416) 925 6096.
Version 6 package from ISI includes an interpreter and
tutorial. Ported to {DEC}, {NeXT}, {SGI}, {Sun-3}, {Sun-4},
{Vax}, {RS/6000}, {MIPS}, {Macintosh}, {Acorn Archimedes},
{IBM PC}, {Atari}, {3b1}, {Amiga}.
{(ftp://watserv1.waterloo.edu/languages/apl/j)}.
J-mode {GNU Emacs} macros available by
{(ftp://think.com/pub/j/gmacs/j-interaction-mode.el)}.
["APL\?", Roger K.W. Hui et al, APL90 Conf Proc, Quote Quad
20(4):192-200].
(1992-10-31)
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