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Index: L

• \l string escape: Controlling Case (Perl tutorial)
• -l file test operator
• • File Test Operators (Perl tutorial)
• -l switch, perl: Command-Line Options (Perl tutorial)
• l command (Perl debugger): Reference: l (Perl tutorial)
• Label widget (Perl/Tk): The Label Widget (Perl tutorial)
• label_exists() (Mail::Folder): Reference: label_exists (Perl tutorial)
• -labelPack option (Frame): The Frame Widget (Perl tutorial)
• labels: Labels and Buttons (Advanced Perl Developing)
• • Compound Statements (Developing Perl)
  • Loop Control (Developing Perl)
  • loops: Loop control (Perl tutorial)
  • • menu: Creating Menus with Tk (Perl tutorial)
    • names for: Names (Developing Perl)
    • packages and: Packages (Developing Perl)
    • statement blocks: Statements (Perl tutorial)
    • with goto statement: goto (Developing Perl)
    • • goto (Developing Perl)
    • with loops: Loop Statements (Developing Perl)
    • • Loop Control (Developing Perl)
      • Developing with Style (Developing Perl)
• -labelVariable option (Frame): The Frame Widget (Perl tutorial)
• language extensions, Perl modules for: The CPAN modules Directory (Developing Perl)
• languages
• • checking characters for: Unicode block properties (Developing Perl)
  • natural vs. artificial: Natural and Artificial Languages (Developing Perl)
  • translating: Generating Perl in Other Languages (Developing Perl)
• last command (Unix): Using Perl-only databases (Perl for System Administration)
• • Using Perl-cliented SQL databases (Perl for System Administration)
• last index (Menu widget): Menu Indexes (Perl tutorial)
• Last() (Mail::POP3Client): Reference: Last (Perl tutorial)
• last access/modification times
• last operator: Finding the First List Element That Passes a Test (Perl tutorial)
• • Reference: last (Perl tutorial)
  • Loop control (Perl tutorial)
  • Breaking out: next and last (Developing Perl)
  • Developing with Style (Developing Perl)
  • Loop Control (Developing Perl)
  • Loop Control (Developing Perl)
  • Case Structures (Developing Perl)
  • Time Efficiency (Developing Perl)
  • last (Developing Perl)
  • Traps (Developing Perl)
  • examples of
  • Net::NNTP module: Reference: last (Perl tutorial)
  • Net::POP3 module: Reference: last (Perl tutorial)
  • used in a do while: Bare Blocks (Developing Perl)
• $LAST_PAREN_MATCH: Special Variables in Alphabetical Order (Developing Perl)
• LastError() (Win32::OLE): Reference: LastError (Perl tutorial)
• last_labeled_message() (Mail::Folder): Reference: last_labeled_message (Perl tutorial)
• last_message() (Mail::Folder): Reference: last_message (Perl tutorial)
• $LAST_PAREN_MATCH ($+) variable: Introduction (Perl tutorial)
• • Regular Expression Special Variables (Perl tutorial)
• laston program: Program: laston (Perl tutorial)
• LaTeX, translating pod to: Reference: pod2latex (Perl tutorial)
• lc(): Controlling Case (Perl tutorial)
• • Reference: lc (Perl tutorial)
  • lc (Developing Perl)
• lcfirst(): Controlling Case (Perl tutorial)
• • Reference: lcfirst (Perl tutorial)
  • lcfirst (Developing Perl)
• LDAP Data Interchange Format
• • Performing LDAP Searches (Perl for System Administration)
  • Entry Representation in Perl (Perl for System Administration)
  • Modifying Entry Attributes (Perl for System Administration)
  • Putting It All Together (Perl for System Administration)
  • The Initial LDAP Connection (Perl for System Administration)
  • • in search operations: Performing LDAP Searches (Perl for System Administration)
    • methods for retrieving: Entry Representation in Perl (Perl for System Administration)
    • modifying: Modifying Entry Attributes (Perl for System Administration)
    • separators: Putting It All Together (Perl for System Administration)
    • values, quoting: The Initial LDAP Connection (Perl for System Administration)
  • modifying with Perl: Modifying Entry Names (Perl for System Administration)
  • representation in Perl: Entry Representation in Perl (Perl for System Administration)
• LDAP (Lightweight Directory Access Protocol)
• • adding/deleting: Adding Entries with Standard LDAP Operations (Perl for System Administration)
  • anonymous authentication: The Initial LDAP Connection (Perl for System Administration)
  • binding: The Initial LDAP Connection (Perl for System Administration)
  • data organization of: LDAP Data Organization (Perl for System Administration)
  • objectClass attribute: The Ten-Minute LDAP Tutorial (Perl for System Administration)
  • Perl modules, comparing: LDAP Developing with Perl (Perl for System Administration)
  • searching: Performing LDAP Searches (Perl for System Administration)
  • tutorial: The Ten-Minute LDAP Tutorial (Perl for System Administration)
• LDIF (LDAP Data Interchange Format): Putting It All Together (Perl for System Administration)
• • Adding Entries with LDIF (Perl for System Administration)
  • Adding Entries with LDIF (Perl for System Administration)
  • • directory entries with: Adding Entries with LDIF (Perl for System Administration)
    • from Perl: Adding Entries with LDIF (Perl for System Administration)
• le (less than or equal) operator: Relational operators (Perl tutorial)
• leading whitespace, removing: Trimming Blanks from the Ends of a String (Perl tutorial)
• leaf objects (LDAP): Dealing with Container/Collection Objects (Perl for System Administration)
• • • from Perl: Dealing with Container/Collection Objects (Perl for System Administration)
• left justification: Format Variables (Developing Perl)
• left-shift (<<) operator: Shift Operators (Developing Perl)
• leftmost longest matching: Quantifiers (Developing Perl)
• length(): Reference: length (Perl tutorial)
• • length (Developing Perl)
  • byte-oriented wrapper for: Effects of Character Semantics (Developing Perl)
• LENGTH (awk variable): Special Variables in Alphabetical Order (Developing Perl)
• length, matching: Quantifiers (Developing Perl)
• -length option (Scale): The Scale Widget (Perl tutorial)
• less module: less (Perl tutorial)
• • Perl Language Extensions and Internals (Developing Perl)
• less than (<, lt) operator: Relational operators (Perl tutorial)
• • Relational Operators (Developing Perl)
• less than or equal (<, le) operator: Relational operators (Perl tutorial)
• • Relational Operators (Developing Perl)
• lexer: Compiling Your Code (Developing Perl)
• lexical analysis: How Perl Works (Developing Perl)
• • in the Perl compiler: Compiling Your Code (Developing Perl)
• lexical scopes: Names (Developing Perl)
• • Lexically Scoped Variables: my (Developing Perl)
  • Pragmas (Developing Perl)
  • package variables, searching for: Name Lookups (Developing Perl)
  • variables attached to: Names (Developing Perl)
• lexical scoping: Lexical Versus Dynamic Scoping (Advanced Perl Developing)
• • Making Variables Private to a Function (Perl tutorial)
  • Saving Global Values (Perl tutorial)
  • Declarations and Scope (Perl tutorial)
  • Private and Local Variables (Perl tutorial)
• lexical variables: Lexical Variables (Advanced Perl Developing)
• • Packages and Variables (Advanced Perl Developing)
  • Formats (Developing Perl)
  • my (Developing Perl)
  • accessing from functions: Scoping Issues (Developing Perl)
  • file-scoped, storing anonymous subroutine in: Private Methods (Developing Perl)
  • in functions or files, showing: Perl Compiler and Code Generator (Developing Perl)
  • persistence across function calls: Scoping Issues (Developing Perl)
  • recursive lexical pad stack: Executing Your Code (Developing Perl)
  • symbolic references and: Symbolic References (Developing Perl)
  • threads, accessing in: Data Access (Developing Perl)
• lexical warnings: Warnings and Exceptions (Developing Perl)
• • ${^WARNING_BITS}: Special Variables in Alphabetical Order (Developing Perl)
• lexically scoped declarations: Scoped Declarations (Developing Perl)
• lexicals: Scoped Variable Declarations (Developing Perl)
• • (see also lexical scope)
• lib module: lib (Perl tutorial)
• • Module Installation Support (Developing Perl)
• lib pragma: Using Modules (Developing Perl)
• libcrack library: Preventing Suspicious Activities (Perl for System Administration)
• • • from Perl: Preventing Suspicious Activities (Perl for System Administration)
• libnet modules: Email Connectivity (Perl tutorial)
• libnet package: Speaking to the Mail Protocols Directly (Perl for System Administration)
• • • from Perl: Speaking to the Mail Protocols Directly (Perl for System Administration)
• libpcap library: Perl Saves the Day (Perl for System Administration)
• • • from Perl: Perl Saves the Day (Perl for System Administration)
• libraries: Packages and Files (Advanced Perl Developing)
• • Introduction (Perl tutorial)
  • C/C++, loading as Perl extensions: Module Installation Support (Developing Perl)
  • • Module Installation Support (Developing Perl)
  • ExtUtils::Liblist module: Module Installation Support (Developing Perl)
  • math library, C: Using Functions from an External C Library (Developing Perl)
  • Perl, installing modules into: Installing CPAN Modules into the Perl Library (Developing Perl)
  • Perl library files, searching for: Environment Variables (Developing Perl)
  • uninstalled extensions from MakeMaker: Module Installation Support (Developing Perl)
• library modules, functions for: Perl Functions by Category (Perl tutorial)
• libwww-perl modules: Introduction (Perl tutorial)
• life cycle, Perl programs: The Life Cycle of a Perl Program (Developing Perl)
• • code generation phase: The Life Cycle of a Perl Program (Developing Perl)
  • compilation phase: The Life Cycle of a Perl Program (Developing Perl)
  • execution phase: The Life Cycle of a Perl Program (Developing Perl)
  • parse tree reconstruction: The Life Cycle of a Perl Program (Developing Perl)
• Lightweight Directory Access Protocol (see LDAP)
• • • from Perl (see LDAP)
• LIKE wildcards (SQL): Retrieving a Subset of the Rows in a Table (Perl for System Administration)
• • • from Perl: Retrieving a Subset of the Rows in a Table (Perl for System Administration)
  • directories, hidden: Local Signs of Peril (Perl for System Administration)
  • driver: Perl to the Rescue (Perl for System Administration)
  • NIS+ and: NIS+ (Perl for System Administration)
  • privileges on, dropping: Drop Your Privileges as Soon as Possible (Perl for System Administration)
  • Sybase OpenClient libraries and: Interacting with an SQL Server from Perl (Perl for System Administration)
• line breaks: Matching Multiple Lines (Perl tutorial)
• • counting lines in files: in a File 8.2. Counting Lines (or Paragraphs or Records) (Perl tutorial)
  • defining lines: Processing Binary Files (Perl tutorial)
  • deleting last file line: Removing the Last Line of a File (Perl tutorial)
  • extracting ranges of lines: Extracting a Range of Lines (Perl tutorial)
  • matching across multiple lines: Matching Multiple Lines (Perl tutorial)
  • random lines from files: Picking a Random Line from a File (Perl tutorial)
  • randomizing file line order: Randomizing All Lines (Perl tutorial)
  • reading files backwards: Reading a File Backwards by Line or Paragraph (Perl tutorial)
  • reading with continuation characters: Reading Lines with Continuation Characters (Perl tutorial)
• line-end processing, automatic: Switches (Developing Perl)
• line input operators (see angle operator)
• LINE: (implicit loop label): Writing a Filter (Perl tutorial)
• line-input <...> operator: Filehandles (Perl tutorial)
• line mode interfaces: Introduction (Perl tutorial)
• • of input file: Special Variables in Alphabetical Order (Developing Perl)
• line-oriented quoting: "Here" Documents (Developing Perl)
• line reading operator: Filehandles (Developing Perl)
• line separator character: Molecules (Developing Perl)
• __LINE__; setting: Generating Perl in Other Languages (Developing Perl)
• line counter (see $. variable)
• line terminators, Internet programs: Networking Servers (Developing Perl)
• __LINE__ token: Determining Current Function Name (Perl tutorial)
• • Global Special Constants (Perl tutorial)
  • Other Literal Tokens (Developing Perl)
• LineInfo option (debugger): Debugger Options (Developing Perl)
• line-end processing: Command-Line Options (Perl tutorial)
• LineInfo option (PERLDB_OPTS): Customizing the Debugger (Perl tutorial)
• • boundary assertions: Beginnings: The \A and ^ Assertions (Developing Perl)
• linestart, lineend modifiers (Text widget): Text Indexes and Modifiers (Perl tutorial)
• Lingua::EN::Inflect module: Printing Correct Plurals (Perl tutorial)
• link(): Reference: link (Perl tutorial)
• • link (Developing Perl)
• link object (PerlScript): The Document Object (Perl tutorial)
• links: readlink (Developing Perl)
• • HTTP, searching for: Regular Expressions (Developing Perl)
• Lint backend (Perl compiler): The Perl Compiler (Perl tutorial)
• lint (C program verifier): Code Development Tools (Developing Perl)
• Linux, installing Perl and: Installing on Unix (Perl tutorial)
• List()
• • Mail::POP3Client module: Reference: List (Perl tutorial)
  • Win32::Internet module: Reference: List (Perl tutorial)
• list context: Scalar and List Contexts (Perl tutorial)
• • List Processing (Developing Perl)
  • Scalar and List Context (Developing Perl)
  • angle operator in: Operator (Developing Perl) 2.11.2. Line Input (Angle)
  • backslash operator, supplying: Other Tricks You Can Do with Hard References (Developing Perl)
  • comma operator in: Comma Operators (Developing Perl)
  • conditional operator in: Conditional Operator (Developing Perl)
  • detecting: Detecting Return Context (Perl tutorial)
  • evaluating expressions in (debugger): Display (Developing Perl)
  • expressions in (see LISTs)
  • forcing scalar context instead: scalar (Developing Perl)
  • foreach statements, providing: The foreach statement (Developing Perl)
  • functions in: Functions (Developing Perl)
  • hash variables, using in: Hashes (Developing Perl)
  • hashes in: Hashes. (Developing Perl)
  • list assignment in: Assignment Operators (Developing Perl)
  • lvalues in: Scoped Variable Declarations (Developing Perl)
  • m// (match) operator in: (Developing Perl) 5.2.2. The m// Operator (Matching)
  • m//g, listing all matches found: (Developing Perl) 5.2.2. The m// Operator (Matching)
  • operations behaving differently in: Frequently Ignored Advice (Developing Perl)
  • range (..) operator in: Range Operator (Developing Perl)
  • recognizing in debugger: Using the Debugger (Developing Perl)
  • subroutines, calling and evaluating in: Semantics (Developing Perl)
• list method, current thread objects in process: Listing current threads (Developing Perl)
• list operators: Unary and Binary Operators (Developing Perl)
• • Terms and List Operators (Leftward) (Perl Developing)
  • List Operators (Rightward) (Perl Developing)
  • unary operators, distinguishing from: Named Unary and File Test Operators (Developing Perl)
• $LIST_SEPARATOR ($") variable: Global Special Variables (Perl tutorial)
• list values, arrays and: List Values and Arrays (Developing Perl)
• list active command (NNTP): The NNTP Protocol (Perl tutorial)
• list_all_labels() (Mail::Folder): Reference: list_all_labels (Perl tutorial)
• list assignment: Exchanging Values Without Using Temporary Variables (Perl tutorial)
• Listbox widget (Perl/Tk): The Listbox Widget (Perl tutorial)
• listen(): Introduction (Perl tutorial)
• • Reference: listen (Perl tutorial)
  • Socket module: Built-in Socket Functions (Perl tutorial)
  • • Server Connections (Perl tutorial)
• listen function: listen (Developing Perl)
• Listen option
• • IO::Socket::INET module: IO::Socket::INET Reference (Perl tutorial)
  • IO::Socket::UNIX module: IO::Socket::UNIX Reference (Perl tutorial)
• listgroup() (Net::NNTP): Reference: listgroup (Perl tutorial)
• listing code: Locating Code (Developing Perl)
• list_labels() (Mail::Folder): Reference: list_labels (Perl tutorial)
• list prototype symbol (@): Prototypes (Perl tutorial)
• LISTs: List Processing (Developing Perl)
• • Compound Statements (Developing Perl)
• $LIST_SEPARATOR: Special Variables in Alphabetical Order (Developing Perl)
• literals: The Regular Expression Bestiary (Developing Perl)
• • numeric (see numeric literals)
  • pseudoliterals (see input operators)
  • string (see string literals)
  • UTF-8, enabling use in: Effects of Character Semantics (Developing Perl)
• little-endian
• • Endianness and Number Width (Developing Perl)
• L<> interior sequence (pod): Interior sequences (Perl tutorial)
• -l option (dprofpp): The Perl Profiler (Perl tutorial)
• .lnk files: Win32::Shortcut (Perl tutorial)
• Load()
• • Win32::OLE::Const module: Win32::OLE::Const (Perl tutorial)
  • Win32::Registry module: Reference: Load (Perl tutorial)
  • Win32::Shortcut module: Reference: Load (Perl tutorial)
• load_all function: Retrieving objects (Advanced Perl Developing)
• load path: Load Path (Advanced Perl Developing)
• loader program (example): Removing the DOS Shell Window with Windows Perl/Tk (Perl tutorial)
• loading data structures: Generation of a Hash of Complex Records (Developing Perl)
• loading functions
• • AutoLoader module: AutoLoader (Perl tutorial)
  • DynaLoader module: DynaLoader (Perl tutorial)
  • SelfLoader module: SelfLoader (Perl tutorial)
• local(): Saving Global Values (Perl tutorial)
• • Redefining a Function (Perl tutorial)
  • Temporarily Overriding a Signal Handler (Perl tutorial)
  • Reference: local (Perl tutorial)
  • • in subroutines, example of: Saving Global Values (Perl tutorial)
    • • Redefining a Function (Perl tutorial)
      • Temporarily Overriding a Signal Handler (Perl tutorial)
      • Reference: local (Perl tutorial)
• local declaration: local (Developing Perl)
• • • my declarations, using for: local (Developing Perl)
• local function: Scoped Variable Declarations (Developing Perl)
• • Lexically Scoped Variables: my (Developing Perl)
  • local (Developing Perl)
  • • my declarations, using for: Scoped Variable Declarations (Developing Perl)
    • • Lexically Scoped Variables: my (Developing Perl)
      • local (Developing Perl)
  • common developing errors with: Universal Blunders (Developing Perl)
  • my declaration, using instead of: Frequently Ignored Advice (Developing Perl)
• local operator: References to Anonymous Storage (Advanced Perl Developing)
• • Lexical Versus Dynamic Scoping (Advanced Perl Developing)
• Local option (IO::Socket::UNIX): IO::Socket::UNIX Reference (Perl tutorial)
• LocalAddr option (IO::Socket::INET): IO::Socket::INET Reference (Perl tutorial)
• locale, Perl modules for: The CPAN modules Directory (Developing Perl)
• locale module: locale (Perl tutorial)
• • Internationalization and Locale (Developing Perl)
• locale settings: Honoring Locale Settings in Regular Expressions (Perl tutorial)
• locales
• • decimal points in formats: Formats (Developing Perl)
  • declarations, string comparisons and: Relational Operators (Developing Perl)
  • modules for: Internationalization and Locale (Developing Perl)
  • Perl character class shortcuts and: Classic Perl Character Class Shortcuts (Developing Perl)
  • Unicode and: lc (Developing Perl)
  • use locale pragma with POSIX character classes: POSIX-Style Character Classes (Developing Perl)
• localization: The CPAN modules Directory (Developing Perl)
• • (see also locale)
• localized values, saving: Executing Your Code (Developing Perl)
• localizing functions: Redefining a Function (Perl tutorial)
• localizing variables: References to Anonymous Storage (Advanced Perl Developing)
• LocalPort option (IO::Socket::INET): IO::Socket::INET Reference (Perl tutorial)
• localtime(): Introduction (Perl tutorial)
• • Printing a Date (Perl tutorial)
  • Reference: localtime (Perl tutorial)
  • Scalar and List Contexts (Perl tutorial)
• localtime function: localtime (Developing Perl)
• • Data Types (Developing Perl)
  • Operating System Interfaces (Developing Perl)
• location object (PerlScript): Client-Side PerlScript (Perl tutorial)
• lock function
• • data access control in threads: Synchronizing access with lock (Developing Perl)
  • reference as argument for: What Is a Reference? (Developing Perl)
• lockarea program: Program: lockarea (Perl tutorial)
• locked attribute: New Tricks (Developing Perl)
• locked attribute (subroutines): Subroutine Attributes (Developing Perl)
• lockfile program: Account System Wrap-Up (Perl for System Administration)
• locking: lock (Developing Perl)
• • blocking signals: Blocking Signals (Perl tutorial)
  • DBK files: Locking DBM Files (Perl tutorial)
  • region-specific locks: Program: lockarea (Perl tutorial)
• locking files: File Locking (Developing Perl)
• • Locking a File (Perl tutorial)
  • Program: netlock (Perl tutorial)
  • DBM files: File Locking (Developing Perl)
  • • dbmopen (Developing Perl)
  • dissolving locks by closing files: File Locking (Developing Perl)
  • flock function: flock (Developing Perl)
  • shared and exclusive locks: File Locking (Developing Perl)
• locking methods: Locking methods (Developing Perl)
• locking subroutines: Locking subroutines (Developing Perl)
• log(): Taking Logarithms (Perl tutorial)
• • Reference: log (Perl tutorial)
• log function: log (Developing Perl)
• log files: Introduction (Perl tutorial)
• • Parsing a Web Server Log File (Perl tutorial)
  • analyzing
  • • black box approach: Black Boxes (Perl for System Administration)
    • database approach: Using Databases (Perl for System Administration)
    • read-remember-process: Read-Remember-Process (Perl for System Administration)
    • stream read-count: Stream Read-Count (Perl for System Administration)
  • binary
  • • Event Log Service: Using the OS's Logging API (Perl for System Administration)
    • wtmp: Binary Log Files (Perl for System Administration)
  • circular buffering of: Circular Buffering (Perl for System Administration)
  • disk space problems and: Disk Space Problems (Perl for System Administration)
  • mail log data, summarizing: Black Boxes (Perl for System Administration)
  • processing: Processing Server Logs (Perl tutorial)
  • rotating: Log Rotation (Perl for System Administration)
  • security of, when processing: Security in log processing programs (Perl for System Administration)
  • stateful vs. stateless: Stateful and Stateless Data (Perl for System Administration)
  • text: Text Logs (Perl for System Administration)
• logarithm: log (Developing Perl)
• log_base() (example): Taking Logarithms (Perl tutorial)
• logarithms (mathematic): Taking Logarithms (Perl tutorial)
• LOGDIR variable: Environment Variables (Perl tutorial)
• • Environment Variables (Developing Perl)
• Logfile::Apache: Processing Server Logs (Perl tutorial)
• Logfile\:\:Rotate module: Log Rotation (Perl for System Administration)
• L0phtCrack program: Preventing Suspicious Activities (Perl for System Administration)
• logfiles, Perl modules for: The CPAN modules Directory (Developing Perl)
• logical
• • AND (&&) operator: Operators (Developing Perl) 3.14. C-Style Logical (Short-Circuit)
  • negation (!) operator: Ideographic Unary Operators (Developing Perl)
  • operators: Operators (Developing Perl) 3.14. C-Style Logical (Short-Circuit)
  • • Logical and, or, not, and xor (Developing Perl)
  • OR (||) operator: Operators (Developing Perl) 3.14. C-Style Logical (Short-Circuit)
  • separation, parent and child processes: The Process Model (Developing Perl)
• logical functionality in patterns: Expressing AND, OR, and NOT in a Single Pattern (Perl tutorial)
• logical operators: Logical Operators (Perl tutorial)
• • Logical Operators (Developing Perl)
  • or operator: Global Declarations (Developing Perl)
  • overloading: Overloadable Operators (Developing Perl)
  • Perl, doing alternation: Letting Perl Do the Work (Developing Perl)
  • precedence of: Syntactic Snafus with Indirect Objects (Developing Perl)
• logical text widget positioning: Inserting text at logical positions (Advanced Perl Developing)
• login()
• • Net::FTP module: Reference: login (Perl tutorial)
  • Net::Netrc module: Reference: login (Perl tutorial)
  • Net::POP3 module: Reference: login (Perl tutorial)
  • • Retrieving Email with Net::POP3 (Perl tutorial)
• Login() (Mail::POP3Client): Reference: Login (Perl tutorial)
• • Explicitly opening and closing connections (Perl tutorial)
• login entries (.netrc): FTP Configuration with Net::Netrc (Perl tutorial)
• login names
• • functions dealing with: Perl Functions by Category (Developing Perl)
  • getgrent function: getgrent (Developing Perl)
  • getgrgid function, returning: getgrgid (Developing Perl)
  • getgrnam function, returning: getgrnam (Developing Perl)
  • getlogin function for: getlogin (Developing Perl)
• login sessions: Introduction (Perl tutorial)
• logn() (Math::Complex): Taking Logarithms (Perl tutorial)
• long longs: pack (Developing Perl)
• longjmp function: Using Eval for Time-Outs (Advanced Perl Developing)
• LongReadLen attribute (DBI): Database Handles and Statement Handles (Perl tutorial)
• longs: pack (Developing Perl)
• LongTruncOk attribute (DBI): Database Handles and Statement Handles (Perl tutorial)
• look command (CPAN.pm): Reference: look (Perl tutorial)
• lookahead: Lookaround Assertions (Developing Perl)
• lookaround: Lookaround Assertions (Developing Perl)
• lookbehind: Lookaround Assertions (Developing Perl)
• lookup() (Net::Netrc): Reference: lookup (Perl tutorial)
• loop variables: Doing Something with Every Element in a List (Perl tutorial)
• loops
• • Conditionals and Loops (Perl tutorial)
  • Universal Blunders (Developing Perl)
  • Constructs (Developing Perl) 1.6.2. Iterative (Looping)
  • Loop Statements (Developing Perl)
  • Universal Blunders (Developing Perl)
  • Developing with Style (Developing Perl)
  • SUBROUTINE operator: Simple Statements (Developing Perl)
  • comments and blank lines, discarding before processing: Letting Perl Do the Work (Developing Perl)
  • control operators for: Loop Control (Developing Perl)
  • endless/infinite
  • eval function within: Time Efficiency (Developing Perl)
  • extracting slices, multidimensional arrays: Slices (Developing Perl)
  • for loops: The for statement (Developing Perl)
  • foreach loops: The foreach statement (Developing Perl)
  • \G assertion, using in: Where You Left Off: The \G Assertion (Developing Perl)
  • infinite: for Loops (Developing Perl)
  • iterating scripts over filenames: Command-Line Options (Perl tutorial)
  • iteration through: for Loops (Developing Perl)
  • labels for: Loop Control (Developing Perl)
  • last operator: for Loops (Developing Perl)
  • • last (Developing Perl)
  • next and last operators: Breaking out: next and last (Developing Perl)
  • next operator: next (Developing Perl)
  • redo operator and: redo (Developing Perl)
  • reset function and: reset (Developing Perl)
  • s/// (substitution) operator, using on arrays: Modifying strings en passant (Developing Perl)
  • using for: for Loops (Developing Perl)
  • using in (global substitutions): When a global substitution just isn't global enough (Developing Perl)
  • using until: while and until Statements (Developing Perl)
  • using while: while and until Statements (Developing Perl)
  • while loops: The while and until statements (Developing Perl)
• doc directory (CPAN), official Perl manpages: CPAN (Developing Perl)
• low-level socket access functions: Perl Functions by Category (Perl tutorial)
• lower() (Canvas): Canvas Methods (Perl tutorial)
• lowercase, converting to: String Literals (Developing Perl)
• lowercase program (example): Writing a Filter (Perl tutorial)
• lpa() (Net::Netrc): Reference: lpa (Perl tutorial)
• lport manpage, function portability information: Perl Functions in Alphabetical Order (Developing Perl)
• ls() (Net::FTP): Reference: ls (Perl tutorial)
• lsof program: Tracking Operations in Unix (Perl for System Administration)
• lst program: Program: lst (Perl tutorial)
• lstat(): Reference: lstat (Perl tutorial)
• lstat (Developing Perl)
• lstat (Developing Perl)
• Filenames, Filesystems, and File Locking (Developing Perl)
• Local Filesystem Changes (Perl for System Administration)
• < (left angle bracket)
• • for filename globbing: Filename Globbing Operator (Developing Perl)
  • for left justification: Format Variables (Developing Perl)
  • for line input: Operator (Developing Perl) 2.11.2. Line Input (Angle)
  • in debugger commands: Actions and Command Execution (Developing Perl)
  • in filenames: open (Developing Perl)
  • less than operator: Relational Operators (Developing Perl)
  • <= (less than or equal) operator: Some Numeric and String Comparison Operators (Developing Perl)
  • • Relational Operators (Developing Perl)
  • <=> (comparison) operator: Some Numeric and String Comparison Operators (Developing Perl)
  • • sort (Developing Perl)
  • <<= (assignment) operator: Assignment Operators (Developing Perl)
  • << for here documents: "Here" Documents (Developing Perl)
• lt (less-than) operator: Relational operators (Perl tutorial)
• lvaluable functions: Accessing Substrings (Perl tutorial)
• lvalues
• • Variables (Developing Perl)
  • Built-in Data Types (Developing Perl)
  • assignment operators and: Assignment Operators (Developing Perl)
  • lvalue attribute, subroutines: Subroutine Attributes (Developing Perl)
  • • The lvalue Attribute (Developing Perl)
  • methods, declaring to indicate return of: New Tricks (Developing Perl)
  • modifiers and: Scoped Variable Declarations (Developing Perl)
  • operators and: Assignment Operators (Developing Perl)
  • pattern-matching operators, use on: Pattern-Matching Operators (Developing Perl)
• LWP library
• • The LWP Library (Perl tutorial)
  • HTML modules: The HTML Module (Perl tutorial)
  • • HTML::Element: HTML::Element (Perl tutorial)
    • HTML::FormatPS: HTML::FormatPS (Perl tutorial)
    • HTML::FormatText: HTML::FormatText (Perl tutorial)
    • HTML::Parser: HTML::Parser (Perl tutorial)
    • HTML::TreeBuilder: HTML::TreeBuilder (Perl tutorial)
  • HTTP modules
  • • HTTP::Cookies: HTTP::Cookies (Perl tutorial)
    • HTTP::Cookies::Netscape: HTTP::Cookies::Netscape (Perl tutorial)
    • HTTP::Daemon: HTTP::Daemon (Perl tutorial)
    • HTTP::Daemon::ClientConn: HTTP::Daemon::ClientConn methods (Perl tutorial)
    • HTTP::Date: HTTP::Date (Perl tutorial)
    • HTTP::Headers: HTTP::Headers (Perl tutorial)
    • HTTP::Message: HTTP::Message (Perl tutorial)
    • HTTP::Request: LWP Overview (Perl tutorial)
    • • HTTP::Request (Perl tutorial)
    • HTTP::Response: LWP Overview (Perl tutorial)
    • • HTTP::Response (Perl tutorial)
    • HTTP::Status: HTTP::Status (Perl tutorial)
• LWP modules: Introduction (Perl tutorial)
• • extracting HTML tags: Extracting or Removing HTML Tags (Perl tutorial)
  • LWP::Debug module: The LWP Modules (Perl tutorial)
  • LWP::Heuristic module: Fetching a URL from a Perl Script (Perl tutorial)
  • LWP::MediaTypes module: The LWP Modules (Perl tutorial)
  • LWP::Protocol module: The LWP Modules (Perl tutorial)
  • LWP::Request module: Fetching a URL from a Perl Script (Perl tutorial)
  • LWP::Response module: Fetching a URL from a Perl Script (Perl tutorial)
  • LWP::RobotUA module: Creating a Robot (Perl tutorial)
  • • The LWP Modules (Perl tutorial)
    • LWP::RobotUA sections (Perl tutorial)
  • LWP::Simple module: Fetching a URL from a Perl Script (Perl tutorial)
  • • Mirroring Web Pages (Perl tutorial)
    • The LWP Modules (Perl tutorial)
    • LWP::Simple (Perl tutorial)
  • LWP::UserAgent module: Fetching a URL from a Perl Script (Perl tutorial)
  • • LWP Overview (Perl tutorial)
    • The LWP Modules (Perl tutorial)
    • LWP::UserAgent (Perl tutorial)
• URI modules: The URI Module (Perl tutorial)
• • URI::Escape: The URI Module (Perl tutorial)
  • URI::Heuristic: The URI Module (Perl tutorial)
  • URI::URL: URI::URL (Perl tutorial)

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