Index: N

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## Index: N

\n: 25.1. Newlines (Programming Perl)
  (see also newlines)
-n command-line option, writing filters: 7.14.3.2. Command-line options (Perl Cookbook)
n command (Perl debugger): 6.2. Debugger Commands (Perl in a Nutshell)
n index
  Entry widget: 21.8.1. Text Indexes (Perl in a Nutshell)
  Listbox widget: 21.10.1. Listbox Indexes (Perl in a Nutshell)
  Menu widget: 21.15.1. Menu Indexes (Perl in a Nutshell)
  Text widget: 21.11.1. Text Indexes and Modifiers (Perl in a Nutshell)
-n (loop) command-line switch: 19.1.3. Switches (Programming Perl)
\n (newline) sequence: 4.6.3. Escaped Sequences (Perl in a Nutshell)
\n shortcut: 1.4.2. What's Inside That Program? (Learning Perl)
  within a single-quoted string: 2.3.1. Single-Quoted String Literals (Learning Perl)
Nagle Algorithm: 17.3.3. Discussion (Perl Cookbook)
naked block control structure: 10.4. The Naked Block Control Structure (Learning Perl)
name( ) (Mail::Address): 16.2.7. Mail::Address Reference (Perl in a Nutshell)
name-value pairs, passing subroutines by named parameter: 10.7.3. Discussion (Perl Cookbook)
named
  character: 2.6.2. String Literals (Programming Perl)
  character, metasymbol for: 5.3.2. Specific Characters (Programming Perl)
  characters, inserting: 15.2. Effects of Character Semantics (Programming Perl)
  parameters (CGI): 10.4. Named Parameters (Perl in a Nutshell)
  pipes: 16.3.4. Named Pipes (Programming Perl)
    16.11.1. Problem (Perl Cookbook)
    Glossary (Programming Perl)
    sigrand program: 16.23. Program: sigrand (Perl Cookbook)
  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)
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)
    Glossary (Programming Perl)
  constructors: 12.4.2. Initializers (Programming Perl)
  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: 2.4. Variables (Programming Perl)
  hashes and: 5.1.1. Why Use a Hash? (Learning 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)
  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: 24.3. Programming with Style (Programming Perl)
  network addresses, getting from: 29.2.51. getnetbyaddr (Programming Perl)
  of hashes: 5.2. Hash Element Access (Learning Perl)
  of variables
    choosing: 2.5.1. Choosing Good Variable Names (Learning Perl)
    enclosed in curly braces: 2.6.1. Interpolation of Scalar Variables into Strings (Learning 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)
  subroutines: 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: 1.2.1. Variable Syntax (Programming Perl)
    2.4. Variables (Programming Perl)
names of current subroutines. determining: 10.4.1. Problem (Perl Cookbook)
namespace (see packages)
  encapsulation based on: 14.6. Tie Modules on CPAN (Programming Perl)
  modules and: 11.2.1. Module Privacy and the Exporter (Programming Perl)
namespace( ) (SOAP::Lite): 14.2.1. SOAP::Lite Methods (Perl in a Nutshell)
namespaces: 4.2.5. Variables (Perl in a Nutshell)
  7.1. Namespaces and Packages (Perl in a Nutshell)
  2.5. Names (Programming Perl)
  Glossary (Programming Perl)
  access, restricting with Safe module: 23.3.1.1. Restricting namespace access (Programming Perl)
  for packages: 1.2.1.4. Simplicities (Programming Perl)
    packages as separators: 2.7. Packages as Namespace Separators (Learning Perl Objects, References and Modules)
    packages for: B.3. Packages (Learning Perl)
  problems with collisions: 2.6. The Problem of Namespace Collisions (Learning Perl Objects, References and Modules)
    12.3. Sample Object-Oriented Interface: File::Spec (Learning Perl Objects, References and Modules)
  XML: 22.. Namespaces (Perl Cookbook)
naming
  loop labels: 4.3.1.5. Loop control (Perl in a Nutshell)
  packages: 7.1. Namespaces and Packages (Perl in a Nutshell)
  socket: 29.2.5. bind (Programming Perl)
  statement block labels: 4.3. Statements (Perl in a Nutshell)
  variables: 4.2.5.2. Hashes (Perl in a Nutshell)
natural languages: 1.2. Natural and Artificial Languages (Programming Perl)
  environment variables controlling Perl handling of: 19.2. Environment Variables (Programming Perl)
natural logarithms: 2.12.2. Solution (Perl Cookbook)
navigating Web with robots: 20.11.1. Problem (Perl Cookbook)
NDBM files: 14.. Introduction (Perl Cookbook)
NDBM_File module: 8.150. 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): 21.10.2. Listbox Methods (Perl in a Nutshell)
neat( ) (DBI): 12.3. DBI Methods (Perl in a Nutshell)
neat_list( ) (DBI): 12.3. DBI Methods (Perl in a Nutshell)
negating shortcuts: 8.1.2. Negating the Shortcuts (Learning Perl)
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 (not) operator (!): 2.7.1. Boolean Values (Learning Perl)
  10.1. The unless Control Structure (Learning Perl)
  10.9.3. Control Structures Using Partial-Evaluation Operators (Learning Perl)
  overloading: 13.3. Overloadable Operators (Programming Perl)
negative array indices: 3.2. Special Array Indices (Learning Perl)
negative array subscripts, counting from end of array: 24.1.5. Previous Perl Traps (Programming Perl)
negative lookahead assertions: 5.9.4. The Little Engine That /Could(n't)?/ (Programming Perl)
  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: 1.2.1.3. Complexities (Programming Perl)
    3.6. Nested Data Structures (Learning Perl Objects, References and Modules)
    3.6. Nested Data Structures (Learning Perl Objects, References and Modules)
    4.3. Reference Counting and Nested Data Structures (Learning Perl Objects, References and Modules)
    printed: 20.2.4. Display (Programming Perl)
  destruction: 12.6. Instance Destructors (Programming Perl)
  element references: 3.7. Simplifying Nested Element References with Arrows (Learning Perl Objects, References and Modules)
  elements, XML: 22.. Namespaces (Perl Cookbook)
  HTML tags: 20.6.3. Discussion (Perl Cookbook)
  lists: 9.1. Arrays of Arrays (Programming Perl)
  object destruction: 10.1. Nested Object Destruction (Learning Perl Objects, References and Modules)
  pattern matching: 6.17.1. Problem (Perl Cookbook)
  subroutines: 10.16.1. Problem (Perl Cookbook)
    8.3.7.2. Nested subroutines (Programming Perl)
Net modules: 8.151. Net::Cmd (Perl in a Nutshell)
  16. Email Connectivity (Perl in a Nutshell)
  Net::Cmd module: 8.151. Net::Cmd (Perl in a Nutshell)
  Net::Config module: 8.152. Net::Config (Perl in a Nutshell)
  Net::Domain module: 8.153. Net::Domain (Perl in a Nutshell)
  Net::FTP module\: 18.2. Net::FTP (Perl in a Nutshell)
  Net::hostent module: 8.155. Net::hostent (Perl in a Nutshell)
  Net::netent module: 8.156. Net::netent (Perl in a Nutshell)
  Net::Netrc module: 8.157. Net::Netrc (Perl in a Nutshell)
    18.3. FTP Configuration with Net::Netrc (Perl in a Nutshell)
  Net::News module: 17.2. Net::NNTP (Perl in a Nutshell)
  Net::NNTP module: 8.158. Net::NNTP (Perl in a Nutshell)
  Net::Ping module: 8.159. Net::Ping (Perl in a Nutshell)
  Net::POP3 module: 8.160. Net::POP3 (Perl in a Nutshell)
    16.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)
  Net::protoent module: 8.161. Net::protoent (Perl in a Nutshell)
  Net::servent module: 8.162. Net::servent (Perl in a Nutshell)
  Net::SMTP module: 8.163. Net::SMTP (Perl in a Nutshell)
    16.1.1. Send Email with Net::SMTP (Perl in a Nutshell)
  Net::SNPP and Net::Time modules: 16. Email Connectivity (Perl in a Nutshell)
  Net::Time module: 8.164. Net::Time (Perl in a Nutshell)
Net::DNS module: 18.1.3. Discussion (Perl Cookbook)
  18.16. Program: expn and vrfy (Perl Cookbook)
Net::FTP module: 18.2.2. Solution (Perl Cookbook)
Net::hostent module: 13.5.3. Discussion (Perl Cookbook)
  29.2.49. gethostent (Programming Perl)
  32.1.8. Networking and Interprocess Communication (Programming Perl)
  Class::Struct, using to create objects and accesors: 32.6. Class::Struct (Programming Perl)
Net::LDAP: 19. Lightweight Directory Access with Net::LDAP (Perl in a Nutshell)
  directory, adding entries to: 19.3. Adding an Entry to the Directory with Net::LDAP (Perl in a Nutshell)
  methods: 19.4. Net::LDAP Methods (Perl in a Nutshell)
  searching LDAP: 19.2. Searching an LDAP Directory with Net::LDAP (Perl in a Nutshell)
Net::LDAP module: 18.8.2. Solution (Perl Cookbook)
netloc( ) (URI::URL): 20.5.3. URI::URL (Perl in a Nutshell)
netlock program: 7.24. Program: netlock (Perl Cookbook)
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::NNTP module: 18.4.2. Solution (Perl Cookbook)
Net::Ping module: 18.7.2. Solution (Perl Cookbook)
  32.1.8. Networking and Interprocess Communication (Programming Perl)
Net::POP3 module: 18.5.2. Solution (Perl Cookbook)
Net::proto module: 29.2.59. getprotobynumber (Programming Perl)
Net::protoent module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
.netrc file: 18.3. FTP Configuration with Net::Netrc (Perl in a Nutshell)
netresource data structure: 22.11. Win32::NetResource (Perl in a Nutshell)
Netscape history.db file: 14.19. 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): 22.11. Win32::NetResource (Perl in a Nutshell)
NetShareCheck( ) (Win32::NetResource): 22.11. Win32::NetResource (Perl in a Nutshell)
NetShareDel( ) (Win32::NetResource): 22.11. Win32::NetResource (Perl in a Nutshell)
NetShareGetInfo( ) (Win32::NetResource): 22.11. Win32::NetResource (Perl in a Nutshell)
NetShareSetInfo( ) (Win32::NetResource): 22.11. Win32::NetResource (Perl in a Nutshell)
Net::SMTP module: B.5.8. The Net::SMTP Module (Learning Perl)
Net::Telnet module: 18.6.2. Solution (Perl Cookbook)
Network News Transfer Protocol (NNTP): 17. Usenet News (Perl in a Nutshell)
networking: B.13. Networking and IPC (Learning Perl)
  clients: 16.5.1. Networking Clients (Programming Perl)
  connections (between client and server): Glossary (Programming Perl)
  email: 16. Email Connectivity (Perl in a Nutshell)
  fetching information, function for: 5.1. Perl Functions by Category (Perl in a Nutshell)
  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 addresses, translating into names: 29.2.47. gethostbyaddr (Programming Perl)
  network filesystems (see NFS)
  network information, functions for retrieving: 29.1. Perl Functions by Category (Programming Perl)
  server administration: 22.10. Win32::NetAdmin (Perl in a Nutshell)
  servers: 16.5.2. Networking Servers (Programming Perl)
  services, Perl module for interacting with: 22.1. The CPAN modules Directory (Programming Perl)
  sockets: 15. Sockets (Perl in a Nutshell)
    built-in functions for: 15.1. Built-in Socket Functions (Perl in a Nutshell)
    IO::Socket module: 15.2. The IO::Socket Module (Perl in a Nutshell)
    IO::Socket::INET subclass: 15.2.4. IO::Socket::INET Reference (Perl in a Nutshell)
    IO::Socket::UNIX subclass: 15.2.5. IO::Socket::UNIX Reference (Perl in a Nutshell)
  Usenet news: 17. 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 file (see /etc/networks file)
new( )
  Data::Dumper: 8.50. Data::Dumper (Perl in a Nutshell)
  Digest::MD5 module: 8.58. Digest::MD5 (Perl in a Nutshell)
  DirHandle module: 8.59. DirHandle (Perl in a Nutshell)
  HTML::Element module: 20.4.3. HTML::Element (Perl in a Nutshell)
  HTTP::Cookies module: 20.3.6. HTTP::Cookies (Perl in a Nutshell)
  HTTP::Cookies::Netscape module: 20.3.6.1. HTTP::Cookies::Netscape (Perl in a Nutshell)
  HTTP::Daemon module: 20.3.7. HTTP::Daemon (Perl in a Nutshell)
  HTTP::Headers module: 20.3.3. HTTP::Headers (Perl in a Nutshell)
  HTTP::Request module: 20.3.1. HTTP::Request (Perl in a Nutshell)
  HTTP::Response module: 20.3.2. HTTP::Response (Perl in a Nutshell)
  LWP::RobotUA module: 20.2.1. LWP::RobotUA Sections (Perl in a Nutshell)
  Mail::Address module: 16.2.7. Mail::Address Reference (Perl in a Nutshell)
  Mail::Folder module: 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
  Mail::Internet module: 16.2.5. Mail::Internet Reference (Perl in a Nutshell)
  Mail::Mailer module: 16.2.1. Send Email with Mail::Mailer (Perl in a Nutshell)
  Mail::Send module: 16.2.2. Better Header Control with Mail::Send (Perl in a Nutshell)
  Net::FTP module: 18.2. Net::FTP (Perl in a Nutshell)
  Net::LDAP: 19.4. Net::LDAP Methods (Perl in a Nutshell)
  Net::NNTP module: 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
  Net::POP3 module: 16.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)
  Net::SMTP module: 16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
  News::Newsrc module: 17.3.1. News::Newsrc Reference (Perl in a Nutshell)
  SOAP::Lite: 14.2.1. SOAP::Lite Methods (Perl in a Nutshell)
  URI::URL module: 20.5.3. URI::URL (Perl in a Nutshell)
  Win32::ChangeNotify module: 22.3. Win32::ChangeNotify (Perl in a Nutshell)
  Win32::Console module: 22.2. Win32::Console (Perl in a Nutshell)
  Win32::Internet module: 22.7. Win32::Internet (Perl in a Nutshell)
    22.7.1. General Internet Methods (Perl in a Nutshell)
  Win32::OLE module: 23.1. Creating Objects (Perl in a Nutshell)
  Win32::OLE::Enum module: 23.3.1. Win32::OLE::Enum Methods (Perl in a Nutshell)
  Win32::OLE::Variant module: 23.4. Win32::OLE::Variant (Perl in a Nutshell)
  Win32::Pipe module: 22.13. Win32::Pipe (Perl in a Nutshell)
  XML::Parser module: 13.2. XML::Parser Methods (Perl in a Nutshell)
new( ): 7.22.3. Discussion (Perl Cookbook)
.new files, renaming from .old files: 13.2. Renaming Files (Learning Perl)
new method: 17.2.1.1. Thread creation (Programming Perl)
  29.2.100. new (Programming Perl)
  creating objects: 9.4. How to Build a Horse (Learning Perl Objects, References and Modules)
  indirect object notation: 10.3. Indirect Object Notation (Learning Perl Objects, References and Modules)
  Math::BigInt module: 12.4. A More Typical Object-Oriented Module: Math::BigInt (Learning Perl Objects, References and Modules)
new_from_fd( ): 7.9.2. Solution (Perl Cookbook)
newgroups( ) (Net::NNTP): 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
newline: 2.2. Molecules (Programming Perl)
newlines (see also line breaks, whitespace)
  blank lines, truth values and: 1.6.2.1. The while and until statements (Programming Perl)
  chomp function, deleting with: 29.2.11. chomp (Programming Perl)
  dot (.) metacharacter, matching: 5.3.3. Wildcard Metasymbols (Programming Perl)
  in filenames, security risks of: 23.1.2. Cleaning Up Your Environment (Programming Perl)
  Perl program portability and: 25.1. Newlines (Programming Perl)
  print function and: 6.4. Output to Standard Output (Learning Perl)
  removing: 1.4. Filehandles (Programming Perl)
  in string literals: 2.6.2. String Literals (Programming Perl)
  strings containing, matches against: 5.2.1. Pattern Modifiers (Programming Perl)
  trailing
    chomp operator for removing: 2.9. The chomp Operator (Learning Perl)
    die function and: 11.3. Fatal Errors with die (Learning Perl)
newnews( ) (Net::NNTP): 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
news: 17. Usenet News (Perl in a Nutshell)
  Net::News module: 17.2. Net::NNTP (Perl in a Nutshell)
  News::Newsrc module: 17.3. The News::Newsrc Module (Perl in a Nutshell)
  NNTP protocol: 17.1. The NNTP Protocol (Perl in a Nutshell)
newsgroups: 0.6.2. Usenet Newsgroups (Programming Perl)
  listing available: 17.1. The NNTP Protocol (Perl in a Nutshell)
  Perl-related: 1.4.1. The comp.lang.perl.* Newsgroups (Perl in a Nutshell)
newsgroups for Perl: 1.3.3. Are There Any Other Kinds of Support? (Learning Perl)
newsgroups( ) (Net::NNTP): 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
News::Newsrc module: 17.3. The News::Newsrc Module (Perl in a Nutshell)
.newsrc file: 17.3. The News::Newsrc Module (Perl in a Nutshell)
next
  used in a do while: 4.5. Bare Blocks (Programming Perl)
  4.3.1.5. Loop control (Perl in a Nutshell)
  24.1.3. C Traps (Programming Perl)
next operator: 10.8.2. The next Operator (Learning Perl)
  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): 23.3.1. Win32::OLE::Enum Methods (Perl in a Nutshell)
next_labeled_message( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
next_message( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
NFA (non-deterministic finite automata): 6.. The Tricky Bits (Perl Cookbook)
NFA (nondeterministic finite-state automaton): 5.9.4. The Little Engine That /Could(n't)?/ (Programming Perl)
NFC( ): 1.9.3. Discussion (Perl Cookbook)
NFD( ): 1.9.2. Solution (Perl Cookbook)
NFKC( ): 1.9.3. Discussion (Perl Cookbook)
NFKD( ): 1.9.3. Discussion (Perl Cookbook)
NFS (network filesystems): Glossary (Programming Perl)
  limitations of: 16.5. Sockets (Programming Perl)
$nlink file statistic: 29.2.165. stat (Programming Perl)
$nlink (number of links): 11.6.1. The stat and lstat Functions (Learning Perl)
nlst( ) (Net::FTP): 18.2. Net::FTP (Perl in a Nutshell)
\N{name} (named character value) sequence: 4.6.3. Escaped Sequences (Perl in a Nutshell)
\NNN metasymbol: 5.3.2. Specific Characters (Programming Perl)
NNTP (Network News Transfer Protocol): 17. Usenet News (Perl in a Nutshell)
nntppost( ) (Mail::Internet): 16.2.5. Mail::Internet Reference (Perl in a Nutshell)
nntpstat( ) (Net::NNTP): 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
no( ): 5. Function Reference (Perl in a Nutshell)
no declaration: 11.1. Using Modules (Programming Perl)
  29.2.102. no (Programming Perl)
no declarations: 4.7. Global Declarations (Programming Perl)
  4.9. Pragmas (Programming Perl)
  14.1.3. Magically Banishing $_ (Programming Perl)
noecho input mode: 15.10.2. Solution (Perl Cookbook)
NOFILE constant: 7.7.3. Discussion (Perl Cookbook)
nomethod overloading key: 13.5. When an Overload Handler Is Missing (nomethod and fallback) (Programming Perl)
non-blocking I/O: 7.20.1. Problem (Perl Cookbook)
non-deterministic finite automata (NFA): 6.. The Tricky Bits (Perl Cookbook)
non-greedy matching: 4.6.6. Quantifiers (Perl in a Nutshell)
non-greedy pattern matching: 6.. The Tricky Bits (Perl Cookbook)
  vs. greedy pattern matching: 6.15.1. Problem (Perl Cookbook)
non-numeric strings, converting to numbers: 2.. Introduction (Perl Cookbook)
nonbacktracking subpatterns: 5.10.2. Nonbacktracking Subpatterns (Programming Perl)
nondecimal integer literals: 2.2.4. Nondecimal Integer Literals (Learning Perl)
nondeterministic finite-state automaton (NFA): 5.9.4. The Little Engine That /Could(n't)?/ (Programming Perl)
none index (Menu widget): 21.15.1. Menu Indexes (Perl in a Nutshell)
noninteractive mode, putting debugger in: 20.4. Unattended Execution (Programming Perl)
nonpaired delimiters: 9.1. Matches with m// (Learning Perl)
NonStop option (PERLDB_OPTS): 6.4. Customizing the Debugger (Perl in a Nutshell)
no_proxy( ) (LWP::UserAgent): 20.2.3. LWP::UserAgent (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: 6.18.1. Problem (Perl Cookbook)
not operator (see negation operator)
Notation handler (Expat): 13.3. Expat Handlers (Perl in a Nutshell)
notational convenience, tied arrays: 14.2.2. Notational Convenience (Programming Perl)
notes, Apache requests: 21.11.3. Discussion (Perl Cookbook)
noTTY option (PERLDB_OPTS): 6.4. Customizing the Debugger (Perl in a Nutshell)
nounder_demo program: 13.15.4. Tie Example: Outlaw $_ (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): 20.2.1. LWP::RobotUA Sections (Perl in a Nutshell)
$now variable: 14.4. Using Backquotes to Capture Output (Learning Perl)
n2perm( ): 4.20. Program: permute (Perl Cookbook)
nph( ) (CGI.pm): 10.7. CGI.pm Reference (Perl in a Nutshell)
$NR variable: 4.4.1. Global Special Variables (Perl in a Nutshell)
nstore( ): 11.13.3. Discussion (Perl Cookbook)
NTFS file permissions: 22.6. Win32::FileSecurity (Perl in a Nutshell)
NUL character: 2.3. Strings (Learning Perl)
  DBM hashes and: 16.1.2. Using a DBM Hash (Learning Perl)
null
  filehandle ;angle operator and: 2.11.2. Line Input (Angle) Operator (Programming Perl)
  list: 2.8. List Values and Arrays (Programming Perl)
  values: Glossary (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)
number width: 25.2. Endianness and Number Width (Programming Perl)
numbered variables: 28.2. Special Variables in Alphabetical Order (Programming Perl)
numbers: 1.4.1. Problem (Perl Cookbook)
  2.. Introduction (Perl Cookbook)
  2.2. Numbers (Learning Perl)
  2.2. Numbers (Learning Perl)
  4.2.1. Numbers (Perl in a Nutshell)
  1.2.1. Variable Syntax (Programming Perl)
  adding commas to: 2.16.1. Problem (Perl Cookbook)
  arrays, storing in: 1.2.1.2. Pluralities (Programming Perl)
  bitwise operators, working with: 3.13. Bitwise Operators (Programming Perl)
  comma-separated: 8.2. General Quantifiers (Learning Perl)
  command (see command history, debugger and)
  commas, inserting into: 7.1. Format Variables (Programming Perl)
  comparison operators for: 2.6.3. Comparison Operators (Learning Perl)
    1.5.6. Some Numeric and String Comparison Operators (Programming Perl)
  complex (imaginary): 2.14.1. Problem (Perl Cookbook)
  complex/imaginary and: B.9.2. Imaginary and Complex Numbers (Learning Perl)
  converted automatically to strings: 2.3.4. Automatic Conversion Between Numbers and Strings (Learning Perl)
  converting between characters and values: 1.4.1. Problem (Perl Cookbook)
  converting binary, octal, and hexadecimal: 2.15.1. Problem (Perl Cookbook)
  converting nonnumeric variables to: 13.3. Overloadable Operators (Programming Perl)
  \D (nondigit) character class: 4.6.4. Character Classes (Perl in a Nutshell)
  d for digit=\d (for digit): 1.7. Regular Expressions (Programming Perl)
  decimal places, controlling: 13.14.5. Example: Overloaded FixNum Class (Perl Cookbook)
  digits in names: 2.5. Names (Programming Perl)
  fixed-precision numeric fields: 4.12. Formats (Perl in a Nutshell)
  floating-point (see floating-point numbers)
    Glossary (Programming Perl)
    comparing: 2.3.1. Problem (Perl Cookbook)
    rounding: 2.2.1. Problem (Perl Cookbook)
  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: 5.2.3. The s/// Operator (Substitution) (Programming Perl)
  high-precision/large: B.9.3. Large and High-Precision Numbers (Learning Perl)
  integers (see integers)
  justifying by decimal point: 7. Formats (Programming Perl)
  large, underscore and: 2.6.1. Numeric Literals (Programming Perl)
  logarithms: 2.12.1. Problem (Perl Cookbook)
  matrix multiplication: 2.13.1. Problem (Perl Cookbook)
  octal: 2.6.1. Numeric Literals (Programming Perl)
    29.2.103. oct (Programming Perl)
  operating on integer series: 2.4.1. Problem (Perl Cookbook)
  for pages: 28.2. Special Variables in Alphabetical Order (Programming Perl)
  plural words based on: 2.17.1. Problem (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: 2.18. Program: Calculating Prime Factors (Perl Cookbook)
  protocol: 29.2.59. getprotobynumber (Programming Perl)
  random: 2.. Introduction (Perl Cookbook)
    29.2.119. rand (Programming Perl)
    29.2.164. srand (Programming Perl)
    biasing: 2.9.1. Problem (Perl Cookbook)
    generating: 2.6.1. Problem (Perl Cookbook)
  Roman numerals: 2.5.1. Problem (Perl Cookbook)
  scalars as: 2.. Introduction (Perl Cookbook)
  sorting: 7.1. Review of Sorting (Learning Perl Objects, References and Modules)
    7.1. Review of Sorting (Learning Perl Objects, References and Modules)
  spaceship operator for comparing: 15.4. Advanced Sorting (Learning Perl)
  sprintf function for: 15.3.1. Using sprintf with "Money Numbers" (Learning Perl)
  strings as valid numbers: 2.1.1. Problem (Perl Cookbook)
  strings, converting to: 2.6. Scalar Values (Programming Perl)
  testing equality: 14.3. Writing Tests with Test::More (Learning Perl Objects, References and Modules)
  trigonometry: 2.10.1. Problem (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)
numeric comparison operators: 2.6.3. Comparison Operators (Learning Perl)
numeric context: 2.7.1. Scalar and List Context (Programming Perl)
  Glossary (Programming Perl)
numeric literals: 2.6.1. Numeric Literals (Programming Perl)
numeric operators: 2.2.5. Numeric Operators (Learning Perl)
numeric user-ID (see user-ID, numeric)
numerical comparison (<=>) operator: 4.15.2. Solution (Perl Cookbook)
NV (internal double value): 21.2. Internal Data Types (Programming Perl)

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