null
<programming> A special value used in several languages to represent the
thing referred to by an uninitialised pointer.
<database> A special value that may be stored in some database columns to
represent an unknown, missing, not applicable, or undefined value. Nulls are
treated completely differently from ordinary values when evaluating SQL
expressions and there are several SQL constructs for dealing with nulls.
(2003-06-17)
Nearby terms:
NUCLEOL « nude « nuke « null » nullary » null
modem » null-terminated multibyte string
nullary
<programming> A description of an operator or function which takes no
arguments, e.g. a function that returns the current time.
"Nullary" is part of the unary, binary, ternary sequence, and is more common
than its synonym niladic.
(2001-02-25)
Nearby terms:
nude « nuke « null « nullary » null modem »
null-terminated multibyte string » NUMA
null modem
<communications, hardware> A cable, especially an EIA-232 cable, for
connecting serial ports on two computers directly, rather than via modems.
Since, according to the specification, both computers should transmit on pin
three of their EIA-232 connectors and receive on pin two, a null modem cable
needs to connect one computer's pin two to the other's pin three and vice versa.
It also needs to have male connectors at both ends (again, according to the
specification).
(1996-05-17)
Nearby terms:
nuke « null « nullary « null modem »
null-terminated multibyte string » NUMA » number
crunching
null-terminated multibyte string
<programming> (NTMBS) (Defined in the ANSI C++ draft)
[Different from null-terminated string?]
(1995-10-02)
Nearby terms:
null « nullary « null modem « null-terminated
multibyte string » NUMA » number crunching »
numbers
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