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Index: N

\n: 25.1. Newlines (Programming Perl)
\n (newline) sequence: 4.6.3. Escaped Sequences (Perl in a Nutshell)
(see also newlines)
-n switch, perl: 7.7. Writing a Filter (Perl Cookbook)
3.2. Command-Line Options (Perl in a Nutshell)
-n (loop) command-line switch: 19.1.3. Switches (Programming Perl)
n command (debugger): Chapter 6, Reference: n (Perl in a Nutshell)
n index
Entry widget: 18.8.1. Text Indexes (Perl in a Nutshell)
Listbox widget: 18.10.1. Listbox Indexes (Perl in a Nutshell)
Menu widget: 18.15.1. Menu Indexes (Perl in a Nutshell)
Text widget: 18.11.1. Text Indexes and Modifiers (Perl in a Nutshell)
Nagle's algorithm: 17.3. Communicating over TCP (Perl Cookbook)
NAME attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
name() (Mail::Address): Chapter 14, Reference: name (Perl in a Nutshell)
name services (see TCP/IP, name services)
ADSI: 6.5.1. ADSI Basics (Perl for System Administration)
LDAP: 6.5.7. Performing Common Tasks Using the WinNT and LDAP Namespaces (Perl for System Administration)
WinNT: 6.5.7. Performing Common Tasks Using the WinNT and LDAP Namespaces (Perl for System Administration)
named parameters (CGI): 10.4. Named Parameters (Perl in a Nutshell)
named pipes: 16.11. Making a Process Look Like a File with Named Pipes (Perl Cookbook)
16.22. Program: sigrand (Perl Cookbook)
named unary operators: 2.11.3. Filename Globbing Operator (Programming Perl)
3.10. Named Unary and File Test Operators (Programming Perl)
listing of: 3.10. Named Unary and File Test Operators (Programming Perl)
character: 2.6.2. String Literals (Programming Perl)
names: 2.5. Names (Programming Perl)
arrays: 2.4. Variables (Programming Perl)
attributes, subroutines: 6.5.1. The locked and method Attributes (Programming Perl)
capitalization conventions: 2.5. Names (Programming Perl)
classes, distinguishing from subroutines: 12.3.4. Package-Quoted Classes (Programming Perl)
commands: 1.2.2. Verbs (Programming Perl)
constructors: 12.4.2. Initializers (Programming Perl)
current subroutines: 10.4. Determining Current Function Name (Perl Cookbook)
file: 2.6.8. Other Literal Tokens (Programming Perl)
for files==>filenames: 29.2.128. rename (Programming Perl)
format (see format names)
formats associated with filehandles: 7. Formats (Programming Perl)
functions: 1.2.2. Verbs (Programming Perl)
getting from network addresses: 29.2.47. gethostbyaddr (Programming Perl)
group names: 29.2.46. getgrnam (Programming Perl)
hashes: 1.3. Nested Data Structures (Advanced Perl Programming)
2.4. Variables (Programming Perl)
hashes, storing in: 1.2.1.2. Pluralities (Programming Perl)
hostnames, translating to network addresses: 29.2.48. gethostbyname (Programming Perl)
identifiers vs.: 2.5. Names (Programming Perl)
labels and filehandles: 2.5. Names (Programming Perl)
login (see login names)
lookups of: 2.5.1. Name Lookups (Programming Perl)
loop labels: 4.3.1.5. Loop control (Perl in a Nutshell)
methods, tied variables: 14. Tied Variables (Programming Perl)
modules: 11.1. Using Modules (Programming Perl)
capitalization in: 11.1. Using Modules (Programming Perl)
modules/packages: 6.2. Packages and Files (Advanced Perl Programming)
7.1. Namespaces and Packages (Perl in a Nutshell)
24.3. Programming with Style (Programming Perl)
network addresses, getting from: 29.2.51. getnetbyaddr (Programming Perl)
packages: 10. Packages (Programming Perl)
parameters, not requiring: 6.2.1. Tricks with Parameter Lists (Programming Perl)
ports, getting from number: 29.2.64. getservbyname (Programming Perl)
program (see $0 variable)
protocols, getting from port numbers: 29.2.65. getservbyport (Programming Perl)
protocols, translating to/from numbers: 29.2.58. getprotobyname (Programming Perl)
scope, confining to: 4.8.1. Scoped Variable Declarations (Programming Perl)
signals: 16.1. Signals (Programming Perl)
statement block labels: 4.3. Statements (Perl in a Nutshell)
subroutines: 3.3.3. Naming Anonymous Subroutines (Advanced Perl Programming)
6.1. Syntax (Programming Perl)
capitalization in: 6.1. Syntax (Programming Perl)
symbol tables: 10.1. Symbol Tables (Programming Perl)
temporary files, generating: 23.2.3. Temporary Files (Programming Perl)
translating to network addresses: 29.2.52. getnetbyname (Programming Perl)
typeglobs: 2.10. Typeglobs and Filehandles (Programming Perl)
users: 29.2.62. getpwnam (Programming Perl)
variable: 24.3. Programming with Style (Programming Perl)
variables: 3.2.2.3. Friendly predefined variables with aliases (Advanced Perl Programming)
4.2.4.2. Hashes (Perl in a Nutshell)
1.2.1. Variable Syntax (Programming Perl)
2.4. Variables (Programming Perl)
namespaces
4.2.4. Variables (Perl in a Nutshell)
7.1. Namespaces and Packages (Perl in a Nutshell)
2.5. Names (Programming Perl)
access, restricting with Safe module: 23.3.1.1. Restricting namespace access (Programming Perl)
encapsulation based on: 14.6. Tie Modules on CPAN (Programming Perl)
for packages: 1.2.1.4. Simplicities (Programming Perl)
importing symbols into: 6.5. Importing Symbols (Advanced Perl Programming)
modules and: 11.2.1. Module Privacy and the Exporter (Programming Perl)
privacy and: 6.4. Privacy (Advanced Perl Programming)
working with multiple: 6.1. Basic Package (Advanced Perl Programming)
(see also packages)
naming, socket: 29.2.5. bind (Programming Perl)
natural languages: 1.2. Natural and Artificial Languages (Programming Perl)
environment variables controlling Perl handling of: 19.2. Environment Variables (Programming Perl)
natural logarithms: 2.13. Taking Logarithms (Perl Cookbook)
navigation web with robots: 20.11. Creating a Robot (Perl Cookbook)
navigator object (PerlScript): 20.1. Client-Side PerlScript (Perl in a Nutshell)
NDBM files: 14.0. Introduction (Perl Cookbook)
NDBM_File module: 8.109. NDBM_File (Perl in a Nutshell)
32.1.10. DBM Interfaces (Programming Perl)
ne (not equal to) operator: 4.5.4.2. Equality operators (Perl in a Nutshell)
ne operator: 24.1.1. Universal Blunders (Programming Perl)
nearest() (Listbox): 18.10.2. Listbox Methods (Perl in a Nutshell)
neat() (DBI): Chapter 12, Reference: neat (Perl in a Nutshell)
neat_list() (DBI): Chapter 12, Reference: neat_list (Perl in a Nutshell)
needspace script: 2.4. Walking the Filesystem Using the File::Find Module (Perl for System Administration)
negation
arithmetic (-)operator: 3.5. Ideographic Unary Operators (Programming Perl)
bitwise (~) operator: 3.5. Ideographic Unary Operators (Programming Perl)
character classes: 5.4.1. Custom Character Classes (Programming Perl)
5.4.2. Classic Perl Character Class Shortcuts (Programming Perl)
logical (!) operator: 3.5. Ideographic Unary Operators (Programming Perl)
of character class: 1.7.1. Quantifiers (Programming Perl)
POSIX character classes: 5.4.4. POSIX-Style Character Classes (Programming Perl)
negation operator (!), overloading: 13.3. Overloadable Operators (Programming Perl)
negative array subscripts, counting from end of array: 24.1.5. Previous Perl Traps (Programming Perl)
negative lookahead assertions: ?/ (Programming Perl) 5.9.4. The Little Engine That /Could(n't)
5.10.1. Lookaround Assertions (Programming Perl)
negative subscripts in Perl: 2.3. Built-in Data Types (Programming Perl)
nested
arrays: 9.1. Arrays of Arrays (Programming Perl)
data structures: B.2. Nested Data Structures (Advanced Perl Programming)
1.3. Nested Data Structures (Advanced Perl Programming)
SWIG and: 18.3. SWIG Features (Advanced Perl Programming)
HTML tags: 20.6. Extracting or Removing HTML Tags (Perl Cookbook)
modules/packages: 6.6. Nesting Packages (Advanced Perl Programming)
subroutines: 10.16. Nesting Subroutines (Perl Cookbook)
net command (Windows NT/2000): 3.2.1. NT/2000 User Identity Storage and Access (Perl for System Administration)
Net modules: 8.110. Net::hostent (Perl in a Nutshell)
14. Email Connectivity (Perl in a Nutshell)
Net::DNS module: 18.9. Program: expn and vrfy (Perl Cookbook)
Net::FTP module: 12.6.1. Net::FTP (Advanced Perl Programming)
18.2. Being an FTP Client (Perl Cookbook)
16.2. Net::FTP (Perl in a Nutshell)
Net::hostent module: 8.110. Net::hostent (Perl in a Nutshell)
Net::netent module: 8.111. Net::netent (Perl in a Nutshell)
Net::Netrc module: 16.3. FTP Configuration with Net::Netrc (Perl in a Nutshell)
Net::News module: 15.2. Net::NNTP (Perl in a Nutshell)
Net::NNTP module: 18.4. Reading and Posting Usenet News Messages (Perl Cookbook)
Net::Ping module: 18.7. Pinging a Machine (Perl Cookbook)
8.112. Net::Ping (Perl in a Nutshell)
Net::POP3 module: 12.6.2. Net::POP3 (Advanced Perl Programming)
18.5. Reading Mail with POP3 (Perl Cookbook)
14.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)
Net::protoent module: 8.113. Net::protoent (Perl in a Nutshell)
Net::servent module: 8.114. Net::servent (Perl in a Nutshell)
Net::SMTP module: 14.1.1. Send Email with Net::SMTP (Perl in a Nutshell)
Net::SNPP and Net::Time modules: 14. Email Connectivity (Perl in a Nutshell)
Net\:\:DNS module: 10.1.2. Network Service Changes (Perl for System Administration)
Net\:\:Finger module: 6.2. Finger: A Simple Directory Service (Perl for System Administration)
Net\:\:LDAP module: 6.4.2. The Initial LDAP Connection (Perl for System Administration)
6.4.5. Adding Entries with LDIF (Perl for System Administration)
6.4.6. Adding Entries with Standard LDAP Operations (Perl for System Administration)
6.4.8. Modifying Entry Names (Perl for System Administration)
adding/deleting: 6.4.6. Adding Entries with Standard LDAP Operations (Perl for System Administration)
modifying: 6.4.8. Modifying Entry Names (Perl for System Administration)
netmail95 program: 8.1.1. Getting sendmail (or Similar Mail Transport Agent) (Perl for System Administration)
modifying: 8.1.1. Getting sendmail (or Similar Mail Transport Agent) (Perl for System Administration)
netloc() (URI::URL): Chapter 17, Reference: netloc (Perl in a Nutshell)
netlock program: 7.21. Program: netlock (Perl Cookbook)
.netrc file: 16.3. FTP Configuration with Net::Netrc (Perl in a Nutshell)
Net::netent module: 29.2.51. getnetbyaddr (Programming Perl)
32.1.8. Networking and Interprocess Communication (Programming Perl)
netnews: 22.1. The CPAN modules Directory (Programming Perl)
(see also Usenet)
Net::Ping module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
Net\:\:NIS module: 5.2. NIS, NIS+, and WINS (Perl for System Administration)
modifying: 5.2. NIS, NIS+, and WINS (Perl for System Administration)
Net\:\:NISPlus module: 5.2.1. NIS+ (Perl for System Administration)
modifying: 5.2.1. NIS+ (Perl for System Administration)
NetPacket modules: 10.4.1. Perl Saves the Day (Perl for System Administration)
modifying: 10.4.1. Perl Saves the Day (Perl for System Administration)
Net\:\:Pcap module: 10.4.1. Perl Saves the Day (Perl for System Administration)
modifying: 10.4.1. Perl Saves the Day (Perl for System Administration)
Net\:\:PcapUtils module: 10.4.1. Perl Saves the Day (Perl for System Administration)
modifying: 10.4.1. Perl Saves the Day (Perl for System Administration)
Net\:\:Ping module: 10.4.1. Perl Saves the Day (Perl for System Administration)
modifying: 10.4.1. Perl Saves the Day (Perl for System Administration)
Net::proto module: 29.2.59. getprotobynumber (Programming Perl)
Net::protoent module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
netresource data structure: 19.11. Win32::NetResource (Perl in a Nutshell)
Netscape history.db file: 14.11. Program: ggh - Grep Netscape Global History (Perl Cookbook)
:netscape method group: 10.2. Importing Method Groups (Perl in a Nutshell)
Net::servent module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
NetShareAdd() (Win32::NetResource): Chapter 19, Reference: NetShareAdd (Perl in a Nutshell)
NetShareCheck() (Win32::NetResource): Chapter 19, Reference: NetShareCheck (Perl in a Nutshell)
NetShareDel() (Win32::NetResource): Chapter 19, Reference: NetShareDel (Perl in a Nutshell)
NetShareGetInfo() (Win32::NetResource): Chapter 19, Reference: NetShareGetInfo (Perl in a Nutshell)
NetShareSetInfo() (Win32::NetResource): Chapter 19, Reference: NetShareSetInfo (Perl in a Nutshell)
Net\:\:SMTP module: 8.1.3. Speaking to the Mail Protocols Directly (Perl for System Administration)
modifying: 8.1.3. Speaking to the Mail Protocols Directly (Perl for System Administration)
Net\:\:SNMP module: 10.3.1. Using SNMP from Perl (Perl for System Administration)
modifying: 10.3.1. Using SNMP from Perl (Perl for System Administration)
Net::Telnet: 18.6. Simulating Telnet from a Program (Perl Cookbook)
Net\:\:Telnet module: 8.1.3. Speaking to the Mail Protocols Directly (Perl for System Administration)
8.3.3.2. Checking against Internet-wide blacklists (Perl for System Administration)
modifying: 8.1.3. Speaking to the Mail Protocols Directly (Perl for System Administration)
8.3.3.2. Checking against Internet-wide blacklists (Perl for System Administration)
Net::Whois module: 18.8. Using Whois to Retrieve Information from the InterNIC (Perl Cookbook)
Network Information Center (NIC): 5.1. Host Files (Perl for System Administration)
modifying: 5.1. Host Files (Perl for System Administration)
Unix: 4.4.2. Tracking Operations in Unix (Perl for System Administration)
Windows NT/2000: 4.4.1. Tracking Operations on Windows NT/2000 (Perl for System Administration)
Network News Transfer Protocol (NNTP): 15. Usenet News (Perl in a Nutshell)
network ports, listing open: 4.4.1. Tracking Operations on Windows NT/2000 (Perl for System Administration)
networking: 12. Networking with Sockets (Advanced Perl Programming)
bidirectional communication: 12.2.3. Bidirectional Communications (Advanced Perl Programming)
clients: 16.5.1. Networking Clients (Programming Perl)
email: 14. Email Connectivity (Perl in a Nutshell)
fetching information, function for: 5.1. Perl Functions by Category (Perl in a Nutshell)
handling multiple clients: 12.3. Handling Multiple Clients (Advanced Perl Programming)
IO objects and filehandles: 12.5. IO Objects and Filehandles (Advanced Perl Programming)
modules for: 32.1.8. Networking and Interprocess Communication (Programming Perl)
modules implementing network protocols: 22.1. The CPAN modules Directory (Programming Perl)
network addresses, translating to names: 29.2.51. getnetbyaddr (Programming Perl)
network filesystems (see NFS)
network information, functions for retrieving: 29.1. Perl Functions by Category (Programming Perl)
RPC module: 13.2. Remote Procedure Calls (RPC) (Advanced Perl Programming)
server administration: 19.10. Win32::NetAdmin (Perl in a Nutshell)
servers: 12.4. Real-World Servers (Advanced Perl Programming)
16.5.2. Networking Servers (Programming Perl)
services, Perl module for interacting with: 22.1. The CPAN modules Directory (Programming Perl)
sockets: 13. Sockets (Perl in a Nutshell)
built-in functions for: 13.1. Built-in Socket Functions (Perl in a Nutshell)
IO::Socket module: 13.2. The IO::Socket Module (Perl in a Nutshell)
IO::Socket::INET subclass: 13.2.4. IO::Socket::INET Reference (Perl in a Nutshell)
IO::Socket::UNIX subclass: 13.2.5. IO::Socket::UNIX Reference (Perl in a Nutshell)
Usenet news: 15. Usenet News (Perl in a Nutshell)
Win32 network modules: 32.1.20. Microsoft-Related Modules (Programming Perl)
networking modules: 16.5. Sockets (Programming Perl)
networks
administering with NIS: 5.2. NIS, NIS+, and WINS (Perl for System Administration)
changes to, detecting: 10.1.2. Network Service Changes (Perl for System Administration)
directory services and: 6.1. What's a Directory? (Perl for System Administration)
suspicious activities: 10.5. Preventing Suspicious Activities (Perl for System Administration)
using SNMP from Perl: 10.3.1. Using SNMP from Perl (Perl for System Administration)
with Perl: 10.4.1. Perl Saves the Day (Perl for System Administration)
pinging/sniffing from Perl: 10.4.1. Perl Saves the Day (Perl for System Administration)
networks file (see /etc/networks file)
Net\:\:XWhois module: 6.3. The WHOIS Directory Service (Perl for System Administration)
new(): 13.0. Introduction (Perl Cookbook)
Adaptor::DBI module: 11.2.2. Object Encapsulation (Advanced Perl Programming)
11.3.2. Adaptor::DBI (Advanced Perl Programming)
Adaptor::File module: 11.2.2. Object Encapsulation (Advanced Perl Programming)
HTML modules
HTML::Element module: 17.4.2. HTML::Element (Perl in a Nutshell)
HTML::FormatPS module: 17.4.4. HTML::FormatPS (Perl in a Nutshell)
HTML::Parser module: 17.4.1. HTML::Parser (Perl in a Nutshell)
HTTP modules
HTTP::Cookies module: 17.3.6. HTTP::Cookies (Perl in a Nutshell)
HTTP::Cookies::Netscape module: 17.3.6.1. HTTP::Cookies::Netscape (Perl in a Nutshell)
HTTP::Daemon module: 17.3.7. HTTP::Daemon (Perl in a Nutshell)
HTTP::Headers module: 17.3.3. HTTP::Headers (Perl in a Nutshell)
HTTP::Request module: 17.3.1. HTTP::Request (Perl in a Nutshell)
HTTP::Response module: 17.3.2. HTTP::Response (Perl in a Nutshell)
IO::Socket module: 12.5. IO Objects and Filehandles (Advanced Perl Programming)
LWP::RobotUA module: 17.2.1. LWP::RobotUA sections (Perl in a Nutshell)
Mail modules
Mail::Address module: Chapter 14, Reference: new (Perl in a Nutshell)
Mail::Folder module: Chapter 14, Reference: new (Perl in a Nutshell)
Mail::Internet module: Chapter 14, Reference: new (Perl in a Nutshell)
Mail::Mailer module: Chapter 14, Reference: new (Perl in a Nutshell)
Mail::POP3Client module: Chapter 14, Reference: new (Perl in a Nutshell)
Mail::Send module: Chapter 14, Reference: new (Perl in a Nutshell)
Net modules
Net::FTP module: Chapter 16, Reference: new (Perl in a Nutshell)
Net::NNTP module: Chapter 15, Reference: new (Perl in a Nutshell)
Net::POP3 module: Chapter 14, Reference: new (Perl in a Nutshell)
Net::SMTP module: Chapter 14, Reference: new (Perl in a Nutshell)
News::Newsrc module: Chapter 15, Reference: new (Perl in a Nutshell)
URI::URL module: 17.5.2. URI::URL (Perl in a Nutshell)
Win32 modules
Win32::ChangeNotification module: 19.3. Win32::ChangeNotification (Perl in a Nutshell)
Win32::Console module: 19.2. Win32::Console (Perl in a Nutshell)
Win32::EventLog module: 19.4. Win32::Eventlog (Perl in a Nutshell)
Win32::Internet module: 19.7. Win32::Internet (Perl in a Nutshell)
19.7.1. General Internet Methods (Perl in a Nutshell)
Win32::Mutex module: 19.9. Win32::Mutex (Perl in a Nutshell)
Win32::OLE module: Chapter 19, Reference: new (Perl in a Nutshell)
Win32::OLE::Enum module: Chapter 19, Reference: new (Perl in a Nutshell)
Win32::OLE::Variant module: 19.18.4. Win32::OLE::Variant (Perl in a Nutshell)
Win32::Semaphore module: 19.14. Win32::Semaphore (Perl in a Nutshell)
Win32::Shortcut module: 19.16. Win32::Shortcut (Perl in a Nutshell)
new method: 17.2.1.1. Thread creation (Programming Perl)
29.2.100. new (Programming Perl)
used in a do while
newnews() (Net::NNTP): Chapter 15, Reference: newnews (Perl in a Nutshell)
news: 18.4. Reading and Posting Usenet News Messages (Perl Cookbook)
15. Usenet News (Perl in a Nutshell)
Net::News module: 15.2. Net::NNTP (Perl in a Nutshell)
News::Newsrc module: 15.3. The News::Newsrc Module (Perl in a Nutshell)
NNTP protocol: 15.1. The NNTP Protocol (Perl in a Nutshell)
newsgroups: 0.6.2. Usenet Newsgroups (Programming Perl)
listing available: 15.1. The NNTP Protocol (Perl in a Nutshell)
Perl-related
1.4.1. The comp.lang.perl.* Newsgroups (Perl in a Nutshell)
newsgroups() (Net::NNTP): Chapter 15, Reference: newsgroups (Perl in a Nutshell)
.newsrc file: 15.3. The News::Newsrc Module (Perl in a Nutshell)
new_tmpfile() (IO::File): 7.5. Creating Temporary Files (Perl Cookbook)
Win32::Shortcut module: 7.5. Creating Temporary Files (Perl Cookbook)
newgroups() (Net::NNTP): Chapter 15, Reference: newgroups (Perl in a Nutshell)
Win32::Shortcut module: Chapter 15, Reference: newgroups (Perl in a Nutshell)
next, used in a do while: 4.5. Bare Blocks (Programming Perl)
next command, do {} while construct, not taking: 24.1.3. C Traps (Programming Perl)
next operator
Chapter 5, Reference: next (Perl in a Nutshell)
Chapter 15, Reference: next (Perl in a Nutshell)
4.3.1.1. while loops (Perl in a Nutshell)
4.3.1.5. Loop control (Perl in a Nutshell)
1.6.2.4. Breaking out: next and last (Programming Perl)
4.4.1. while and until Statements (Programming Perl)
4.4.4. Loop Control (Programming Perl)
4.4.4. Loop Control (Programming Perl)
29.2.101. next (Programming Perl)
exiting once-through blocks with: 4.5. Bare Blocks (Programming Perl)
next if construct: 24.2.1. Time Efficiency (Programming Perl)
Next() (Win32::OLE::Enum): Chapter 19, Reference: Next (Perl in a Nutshell)
next_labeled_message() (Mail::Folder): Chapter 14, Reference: next_labeled_message (Perl in a Nutshell)
next_message() (Mail::Folder): Chapter 14, Reference: next_message (Perl in a Nutshell)
NEXTKEY function: 9.3. Tying Hashes (Advanced Perl Programming)
NFA (nondeterministic finite automata): 6.0. Introduction (Perl Cookbook)
NFA (nondeterministic finite-state automaton): ?/ (Programming Perl) 5.9.4. The Little Engine That /Could(n't)
limitations of: 16.5. Sockets (Programming Perl)
$nlink file statistic: 29.2.165. stat (Programming Perl)
NIC (Network Information Center): 5.1. Host Files (Perl for System Administration)
NIS+: 5.2.1. NIS+ (Perl for System Administration)
(see also NIS)
NIS (Network Information Service)
DNS and: 5.3. Domain Name Service (DNS) (Perl for System Administration)
querying from Perl: 5.2. NIS, NIS+, and WINS (Perl for System Administration)
nlst() (Net::FTP): Chapter 16, Reference: nlst (Perl in a Nutshell)
\NNN metasymbol: 5.3.2. Specific Characters (Programming Perl)
no declarations: 4.7. Global Declarations (Programming Perl)
4.9. Pragmas (Programming Perl)
11.1. Using Modules (Programming Perl)
14.1.3. Magically Banishing $_ (Programming Perl)
NNTP (Network News Transfer Protocol): 15. Usenet News (Perl in a Nutshell)
nntppost() (Mail::Internet): Chapter 14, Reference: nntppost (Perl in a Nutshell)
nntpstat() (Net::NNTP): Chapter 15, Reference: nntpstat (Perl in a Nutshell)
no declaration: Chapter 5, Reference: no (Perl in a Nutshell)
noecho input mode: 15.10. Reading Passwords (Perl Cookbook)
NOFILE constant: 7.17. Caching Open Output Filehandles (Perl Cookbook)
nomethod overloading key: (Programming Perl) 13.5. When an Overload Handler Is Missing (nomethod and fallback)
non-blocking I/O: 7.14. Doing Non-Blocking I/O (Perl Cookbook)
non-forking servers: 17.13. Non-Forking Servers (Perl Cookbook)
non-greedy matching: 6.0. Introduction (Perl Cookbook)
6.15. Greedy and Non-Greedy Matches (Perl Cookbook)
4.6.6. Quantifiers (Perl in a Nutshell)
nonbacktracking subpatterns: 5.10.2. Nonbacktracking Subpatterns (Programming Perl)
nondeterministic finite automata (NFA): 6.0. Introduction (Perl Cookbook)
nondeterministic finite-state automaton (NFA): ?/ (Programming Perl) 5.9.4. The Little Engine That /Could(n't)
none index (Menu widget): 18.15.1. Menu Indexes (Perl in a Nutshell)
nonforker program (example): 17.13. Non-Forking Servers (Perl Cookbook)
noninteractive mode, putting debugger in: 20.4. Unattended Execution (Programming Perl)
nonnblocking filehandles: 12.3.3. Nonblocking Filehandles (Advanced Perl Programming)
NonStop option (PERLDB_OPTS): 6.4. Customizing the Debugger (Perl in a Nutshell)
no_proxy() (LWP::UserAgent): Chapter 17, Reference: no_proxy (Perl in a Nutshell)
not (!) operator: 3.5. Ideographic Unary Operators (Programming Perl)
not equal to (!=) operator: 3.12. Equality Operators (Programming Perl)
NOT functionality in regular expressions: 6.17. Expressing AND, OR, and NOT in a Single Pattern (Perl Cookbook)
notational convenience, tied arrays: 14.2.2. Notational Convenience (Programming Perl)
noTTY option (PERLDB_OPTS): 6.4. Customizing the Debugger (Perl in a Nutshell)
nounder_demo program (example): 13.15. Creating Magic Variables with tie (Perl Cookbook)
nouns: 1.2. Natural and Artificial Languages (Programming Perl)
packages, handling of: 1.2.1.4. Simplicities (Programming Perl)
novice programmers, common mistakes of: 24.1. Common Goofs for Novices (Programming Perl)
no_visits() (LWP::RobotUA): Chapter 17, Reference: no_visits (Perl in a Nutshell)
nph() (CGI.pm): Chapter 10, Reference: nph (Perl in a Nutshell)
$NR variable: 4.4.1. Global Special Variables (Perl in a Nutshell)
nslookup program: 5.3.2.1. Using nslookup (Perl for System Administration)
nstore(): 11.13. Storing Data Structures to Disk (Perl Cookbook)
NTFS file permissions: 19.6. Win32::FileSecurity (Perl in a Nutshell)
ntrights.exe (Windows NT/2000): 3.2.5. NT/2000 User Rights (Perl for System Administration)
null
filehandle ;angle operator and: Operator (Programming Perl) 2.11.2. Line Input (Angle)
list: 2.8. List Values and Arrays (Programming Perl)
null device, Unix: 14.4.2. Creative Filehandles (Programming Perl)
null list, assigning to arrays: 2.8.2. Array Length (Programming Perl)
null values ("" or 0): 1.2.1.1. Singularities (Programming Perl)
NULLABLE attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
number width: 25.2. Endianness and Number Width (Programming Perl)
numbered variables: 28.2. Special Variables in Alphabetical Order (Programming Perl)
numeric context: 2.7.1. Scalar and List Context (Programming Perl)
numeric literals: 2.6.1. Numeric Literals (Programming Perl)
NUM_OF_FIELDS attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
NUM_OF_PARAMS attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
numbers: 1.4. Converting Between ASCII Characters and Values (Perl Cookbook)
2.0. Introduction (Perl Cookbook)
4.2.1. Numbers (Perl in a Nutshell)
1.2.1. Variable Syntax (Programming Perl)
adding commas to: 2.17. Putting Commas in Numbers (Perl Cookbook)
arrays, storing in: 1.2.1.2. Pluralities (Programming Perl)
bitwise operators, working with: 3.13. Bitwise Operators (Programming Perl)
command (see command history, debugger and)
commas, inserting into: 7.1. Format Variables (Programming Perl)
comparison operators for: 1.5.6. Some Numeric and String Comparison Operators (Programming Perl)
complex (imaginary): 2.15. Using Complex Numbers (Perl Cookbook)
converting binary with decimal: 2.4. Converting Between Binary and Decimal (Perl Cookbook)
converting nonnumeric variables to: 13.3. Overloadable Operators (Programming Perl)
converting with ASCII characters: 1.4. Converting Between ASCII Characters and Values (Perl Cookbook)
\d (digit) character class
4.6.4. Character Classes (Perl in a Nutshell)
d for digit=\d (for digit): 1.7. Regular Expressions (Programming Perl)
\D (nondigit) character class: 4.6.4. Character Classes (Perl in a Nutshell)
decimal places, controlling: 13.14. Overloading Operators (Perl Cookbook)
digits in names: 2.5. Names (Programming Perl)
fixed-precision numeric fields: 4.10. Formats (Perl in a Nutshell)
floating-point (see floating-point numbers)
2.2. Comparing Floating-Point Numbers (Perl Cookbook)
2.3. Rounding Floating-Point Numbers (Perl Cookbook)
for pages: 28.2. Special Variables in Alphabetical Order (Programming Perl)
functions dealing with: 29.1. Perl Functions by Category (Programming Perl)
functions for: 5.1. Perl Functions by Category (Perl in a Nutshell)
hexadecimal: 2.6.1. Numeric Literals (Programming Perl)
29.2.73. hex (Programming Perl)
hexadecimal, converting to: (Programming Perl) 5.2.3. The s/// Operator (Substitution)
integers (see integers)
justifying by decimal point: 7. Formats (Programming Perl)
large, underscore and: 2.6.1. Numeric Literals (Programming Perl)
line (__LINE__ token): 10.4. Determining Current Function Name (Perl Cookbook)
4.4.4. Global Special Constants (Perl in a Nutshell)
logarithms: 2.13. Taking Logarithms (Perl Cookbook)
matrix multiplication: 2.14. Multiplying Matrices (Perl Cookbook)
octal: 2.6.1. Numeric Literals (Programming Perl)
29.2.103. oct (Programming Perl)
plural words based on: 2.18. Printing Correct Plurals (Perl Cookbook)
port, getting name for: 29.2.64. getservbyname (Programming Perl)
ports, getting protocol names from: 29.2.65. getservbyport (Programming Perl)
primes, calculating: 2.19. Program: Calculating Prime Factors (Perl Cookbook)
protocol: 29.2.59. getprotobynumber (Programming Perl)
random: 2.0. Introduction (Perl Cookbook)
2.7. Generating Random Numbers (Perl Cookbook)
29.2.119. rand (Programming Perl)
29.2.164. srand (Programming Perl)
biasing: 2.10. Generating Biased Random Numbers (Perl Cookbook)
roman numerals: 2.6. Working with Roman Numerals (Perl Cookbook)
strings as valid numbers: 2.1. Checking Whether a String Is a Valid Number (Perl Cookbook)
strings, converting to: 2.6. Scalar Values (Programming Perl)
trigonometry: 2.11. Doing Trigonometry in Degrees, not Radians (Perl Cookbook)
truncating with int: 29.2.76. int (Programming Perl)
truth values of: 1.6.1. What Is Truth? (Programming Perl)
typing in Perl: 2.6. Scalar Values (Programming Perl)
width of: 25.2. Endianness and Number Width (Programming Perl)
NV (internal double value): 21.2. Internal Data Types (Programming Perl)
NVs (doubles): 20.3.1. Scalar Values (Advanced Perl Programming)

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