null definition
<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 definition
<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 definition
<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 definition
<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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