Index: N

• -n command-line option : Writing a Filter
• Nagle's algorithm : Communicating over TCP
• named pipes
• • Making a Process Look Like a File with Named Pipes
  • Program: sigrand
• names of current subroutines : Determining Current Function Name
• natural logarithms : Taking Logarithms
• navigation web with robots : Creating a Robot
• NDBM files : Introduction
• nested HTML tags : Extracting or Removing HTML Tags
• nested subroutines : Nesting Subroutines
• Net::DNS module : Program: expn and vrfy
• Net::FTP module : Being an FTP Client
• Net::NNTP module : Reading and Posting Usenet News Messages
• Net::POP3 module : Reading Mail with POP3
• Net::Telnet : Simulating Telnet from a Program
• Net::Whois module : Using Whois to Retrieve Information from the InterNIC
• Net:\Ping module : Pinging a Machine
• netlock program : Program: netlock
• Netscape history.db file : Program: ggh&nbsp- Grep Netscape Global History
• new( ) : Introduction
• new_tmpfile( ) (IO::File) : Creating Temporary Files
• newline characters : (see line breaks)
• newlines : (see line breaks; whitespace)
• news messages (Usenet) : Reading and Posting Usenet News Messages
• NFA (non-deterministic finite automata) : Introduction
• noecho input mode : Reading Passwords
• NOFILE constant : Caching Open Output Filehandles
• non-blocking I/O : Doing Non-Blocking I/O
• non-deterministic finite automata : Introduction
• non-forking servers : Non-Forking Servers
• non-greedy pattern matching
• • Introduction
  • Greedy and Non-Greedy Matches
• nonforker program (example) : Non-Forking Servers
• NOT functionality in regular expressions : Expressing AND, OR, and NOT in a Single Pattern
• nounder_demo program (example) : Creating Magic Variables with tie
• nstore( ) : Storing Data Structures to Disk
• numbers
• • (see also values)
  • Converting Between ASCII Characters and Values
  • Introduction
  • adding commas to : Putting Commas in Numbers
  • complex (imaginary) : Using Complex Numbers
  • converting binary with decimal : Converting Between Binary and Decimal
  • converting with ASCII characters : Converting Between ASCII Characters and Values
  • decimal places, controlling : Overloading Operators
  • floating-point : Introduction
  • • comparing : Comparing Floating-Point Numbers
    • rounding : Rounding Floating-Point Numbers
  • logarithms : Taking Logarithms
  • matrix multiplication : Multiplying Matrices
  • octal and hexadecimal : Converting Between Octal and Hexadecimal
  • operating on integer series : Operating on a Series of Integers
  • plural words based on : Printing Correct Plurals
  • primes, calculating : Program: Calculating Prime Factors
  • random
  • • Introduction
    • Generating Random Numbers
    • biasing : Generating Biased Random Numbers
  • roman numerals : Working with Roman Numerals
  • strings as valid numbers : Checking Whether a String Is a Valid Number
  • trigonometry : Doing Trigonometry in Degrees, not Radians