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nil    音標拼音: [n'ɪl]
n. 無,全無,零

無,全無,零

nil
空 無

nil
n 1: a quantity of no importance; "it looked like nothing I had
ever seen before"; "reduced to nil all the work we had
done"; "we racked up a pathetic goose egg"; "it was all for
naught"; "I didn't hear zilch about it" [synonym: {nothing},
{nil}, {nix}, {nada}, {null}, {aught}, {cipher}, {cypher},
{goose egg}, {naught}, {zero}, {zilch}, {zip}, {zippo}]

Nil \Nil\ [See {Nill}, v. t.]
Will not. [Obs.] --Chaucer.
[1913 Webster]


Nil \Nil\, n. & a. [L., a contr. of nihil.]
Nothing; of no account; worthless; -- a term often used for
canceling, in accounts or bookkeeping. --A. J. Ellis.
[1913 Webster]


Nil \Nil\, n. (computers)
A special value for a variable used in certain computer
languages to mean no assigned value, to be distinguished from
the value zero.
[PJC]

/nil/ 1. New Implementation of Lisp. A language intended to
be the successor of {MacLisp}. A large {Lisp}, implemented
mostly in {VAX} {assembly language}. A forerunner of {Common
LISP}.

["NIL: A Perspective", Jon L. White, MACSYMA Users' Conf Proc,
1979].

2. Network Implementation Language. Strom & Yemini, TJWRC,
IBM. Implementation of complex networking protocols in a
modular fashion.

["NIL: An Integrated Language and System for Distributed
Programming", R. Strom et al, SIGPLAN Notices 18(6):73-82
(June 1983)].

3. Empty list or False. In {Lisp}, the empty list (or "nil
list") is used to represent the {Boolean} value False. This
is possible because {Lisp} is not typed. True is represented
by the special {atom} "t".

4. Spoken in reply to a question, particularly one asked using
the "-P" convention it means "No". Most hackers assume this
derives simply from LISP, but NIL meaning "no" was
well-established among radio hams decades before LISP existed.
The historical connection between early hackerdom and the ham
radio world was strong enough that this may have been an
influence.

[{Jargon File}]

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