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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
RRP £29.95 ($39.95)

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29.14 N

named pipe
A pipe with a name embedded in the filesystem so that it can be accessed by two unrelated processes.
namespace
A domain of names. You needn't worry about whether the names in one such domain have been used in another. See package.
network address
The most important attribute of a socket, like your telephone's telephone number. Typically an IP address. See also port.
newline
A single character that represents the end of a line, with the ASCII value of 012 octal under Unix (but 015 on a Mac), and represented by \n in Perl strings. For Windows machines writing text files, and for certain physical devices like terminals, the single newline gets automatically translated by your C library into a line feed and a carriage return, but normally, no translation is done.
NFS
Network File System, which allows you to mount a remote filesystem as if it were local.
null character
A character with the ASCII value of zero. It's used by C to terminate strings, but Perl allows strings to contain a null.
null list
A list value with zero elements, represented in Perl by ().
null string
A string containing no characters, not to be confused with a string containing a null character, which has a positive length and is true.
numeric context
The situation in which an expression is expected by its surroundings (the code calling it) to return a number. See also context and string context.
NV
Short for Nevada, no part of which will ever be confused with civilization. NV also means an internal floating-point Numeric Value of the type a scalar can hold, not to be confused with an IV.
nybble
Half a byte, equivalent to one hexadecimal digit, and worth four bits.
ISBN 9781906966027Perl Language Reference ManualSee the print edition