Index: H

Symbols & Numbers
| A
| B
| C
| D
| E
| F
| G
| H
| I
| J
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Index: H
- h command (CPAN.pm):  2.4.4. Installing Modules with the CPAN Module (Perl in a Nutshell)
- h command (Perl debugger):  6.2. Debugger Commands (Perl in a Nutshell)
- -h (help) command-line switch:  19.1.3. Switches (Programming Perl)
- -h option (perlbug):  6.6. The perlbug Program (Perl in a Nutshell)
- hacker: Glossary (Programming Perl)
- handlers:  8.2. Attribute::Handlers (Perl in a Nutshell)
- 
  - Glossary (Programming Perl)
- Apache:  21.. Handlers (Perl Cookbook)
- overload:  13.1. The overload Pragma (Programming Perl)
- 
    -  13.2. Overload Handlers (Programming Perl)
- missing:  13.5. When an Overload Handler Is Missing (nomethod and fallback) (Programming Perl)
 
- overloading
- 
    
    - as_string handler:  13.3. Overloadable Operators (Programming Perl)
 
- sharing information between:  21.13.1. Problem (Perl Cookbook)
- for signals:  16.1. Signals (Programming Perl)
 
- handlers for signals (see signal handlers)
- handles:  13.15.1. Problem (Perl Cookbook)
- 
  -  1.2.1. Variable Syntax (Programming Perl)
- directories:  32.1.5. Filehandle, Directory Handle, and
Stream I/O Utilities (Programming Perl)
- 
    - Glossary (Programming Perl)
 
- references to:  8.2.4. Handle References (Programming Perl)
- tied, base class definitons for:  32.1.14. Convenient Classes (Programming Perl)
 
- hard links:  9.. Introduction (Perl Cookbook)
- 
  -  13.3. Links and Files (Learning Perl)
-  13.3. Links and Files (Learning Perl)
 
- hard links, filenames:  29.2.85. link (Programming Perl)
- hard references:  3.2. The Arrow Operator (Programming Perl)
- 
  -  8.1. What Is a Reference? (Programming Perl)
-  8.2. Creating References (Programming Perl)
- Glossary (Programming Perl)
- %SIG array:  16.1. Signals (Programming Perl)
- using:  8.3. Using Hard References (Programming Perl)
- 
    
    - closures:  8.3.7. Closures (Programming Perl)
 
 
- hardware devices: Glossary (Programming Perl)
- hardware drivers, Perl modules for interacting with:  22.1. The CPAN modules Directory (Programming Perl)
- hash elements, accessing:  5.2. Hash Element Access (Learning Perl)
- hash functions:  5.3. Hash Functions (Learning Perl)
- hash keys:  5.1. What Is a Hash? (Learning Perl)
- 
  
  - delete function for removing:  5.4.2. The delete Function (Learning Perl)
- exists function for checking:  5.4.1. The exists Function (Learning Perl)
- omitting quotes from:  17.4. Unquoted Hash Keys (Learning Perl)
- sorting:  15.4.1. Sorting a Hash by Value (Learning Perl)
 
- hash-list equivalence:  5.. Introduction (Perl Cookbook)
- hash mark (#)
- 
  
  - #! (shebang) line:  3. The Perl Executable (Perl in a Nutshell)
- for comments:  4.1. Program Structure (Perl in a Nutshell)
- format fieldholders:  4.12. Formats (Perl in a Nutshell)
 
- hash prototype symbol (%):  4.7.5. Prototypes (Perl in a Nutshell)
- hash reference
- 
  
  - anonymous hash constructors:  4.6. Creating an Anonymous Hash (Learning Perl Objects, References and Modules)
- autovivification and:  4.8. Autovivification and Hashes (Learning Perl Objects, References and Modules)
- Data::Dumper example:  5.2. Viewing Complex Data with Data::Dumper (Learning Perl Objects, References and Modules)
- debugging example:  5.1. Using the Debugger to View Complex Data (Learning Perl Objects, References and Modules)
- 
    -  5.1. Using the Debugger to View Complex Data (Learning Perl Objects, References and Modules)
-  5.1. Using the Debugger to View Complex Data (Learning Perl Objects, References and Modules)
 
- dereferencing:  3.8. References to Hashes (Learning Perl Objects, References and Modules)
- features:  3.8. References to Hashes (Learning Perl Objects, References and Modules)
- filesystem capture example:  7.6. Building Recursively Defined Data (Learning Perl Objects, References and Modules)
- object destruction:  10. Object Destruction (Learning Perl Objects, References and Modules)
- as parameters:  3.9.2. Exercise 2 [30 min] (Learning Perl Objects, References and Modules)
- as return values:  7.6. Building Recursively Defined Data (Learning Perl Objects, References and Modules)
 
- hashDepth option (debugger):  20.3.3. Debugger Options (Programming Perl)
- hashes:  4.7.3. Discussion (Perl Cookbook)
- 
  -  5.. Introduction (Perl Cookbook)
-  5. Hashes (Learning Perl)
-  4.2. Data Types and Variables (Perl in a Nutshell)
-  4.2.5.2. Hashes (Perl in a Nutshell)
-  7.6. Building Recursively Defined Data (Learning Perl Objects, References and Modules)
-  1.2.1. Variable Syntax (Programming Perl)
-  1.2.1.2. Pluralities (Programming Perl)
-  1.2.1.2.2. Hashes. (Programming Perl)
-  2.3. Built-in Data Types (Programming Perl)
-  2.9. Hashes (Programming Perl)
- Glossary (Programming Perl)
-  printing out in sorted order:  4.4.3. foreach Loops (Programming Perl)
- accessing elements of:  5.2. Hash Element Access (Learning Perl)
- adding elements to:  5.1.1. Problem (Perl Cookbook)
- 
    -  10.11.3.2. Mimicking built-ins (Perl Cookbook)
 
- anonymous:  11.. Anonymous Data (Perl Cookbook)
- 
    
    - data structure for objects:  12.7. Managing Instance Data (Programming Perl)
- references to:  12.4. Object Construction (Programming Perl)
 
- anonymous, references to:  8.2.2.2. The anonymous hash composer (Programming Perl)
- of arrays:  11.2.1. Problem (Perl Cookbook)
- 
    -  9.2. Hashes of Arrays (Programming Perl)
-  9.3. Arrays of Hashes (Programming Perl)
- access and printing of:  9.2.3. Access and Printing of a Hash of Arrays (Programming Perl)
- generating:  9.2.2. Generation of a Hash of Arrays (Programming Perl)
- 
      -  9.3.2. Generation of an Array of Hashes (Programming Perl)
 
 
- arrays and:  5.. Introduction (Perl Cookbook)
- assigning:  5.2.2. Hash Assignment (Learning Perl)
- autoincrements/autodecrements and:  10.6.1. The Value of Autoincrement (Learning Perl)
- binding DBM files to:  29.2.22. dbmopen (Programming Perl)
- buckets: Glossary (Programming Perl)
- cascading conditionals, using instead of:  4.5.1. Case Structures (Programming Perl)
- comparing keys of:  5.12.1. Problem (Perl Cookbook)
- of complex records:  9.6.3. Generation of a Hash of Complex Records (Programming Perl)
- counting how often something appears:  5.15.3. Discussion (Perl Cookbook)
- deleting elements of:  5.4.1. Problem (Perl Cookbook)
- deleting values from:  29.2.24. delete (Programming Perl)
- directories as:  7.6. Building Recursively Defined Data (Learning Perl Objects, References and Modules)
- dutree program:  5.17. Program: dutree (Perl Cookbook)
- elements, giving temporary values to:  29.2.87. local (Programming Perl)
- elements of, interpolating into double-quoted string literals:  5.4.3. Hash Element Interpolation (Learning Perl)
- exists function and:  29.2.34. exists (Programming Perl)
- finding most common anything:  5.15.1. Problem (Perl Cookbook)
- flat lookup tables, providing access to:  9. Data Structures (Programming Perl)
- functions for:  5.3. Hash Functions (Learning Perl)
- functions for processing:  5.1. Perl Functions by Category (Perl in a Nutshell)
- HV (hash value) typedef in C:  21.2. Internal Data Types (Programming Perl)
- %INC for modules:  11.1. Using Modules (Programming Perl)
- initializing:  5.. Introduction (Perl Cookbook)
- initializing with x operator:  3.7. Multiplicative Operators (Programming Perl)
- instances and:  9.8. More Interesting Instances (Learning Perl Objects, References and Modules)
- instead of linear searches:  24.2.1. Time Efficiency (Programming Perl)
- inverting:  5.9.1. Problem (Perl Cookbook)
- 
    -  29.2.132. reverse (Programming Perl)
 
- keys: Glossary (Programming Perl)
- keys, finding number in:  2.9. Hashes (Programming Perl)
- keys, returning list of:  29.2.79. keys (Programming Perl)
- key/value pair precedence:  2.9. Hashes (Programming Perl)
- key/value pairs:  2.3. Built-in Data Types (Programming Perl)
- 
    -  2.9. Hashes (Programming Perl)
- capturing from string with m//g operator:  5.2.2. The m// Operator (Matching) (Programming Perl)
 
- key/value pairs in:  1.2.1.2.2. Hashes. (Programming Perl)
- for list unions, intersections, differences:  4.8.3. Discussion (Perl Cookbook)
- lookups by key or value:  13.15.7. Tie Example: Hash That Allows Lookups by Key or Value (Perl Cookbook)
- map operator and:  5.5. Using map (Learning Perl Objects, References and Modules)
- merging:  5.11.1. Problem (Perl Cookbook)
- multidimensional:  9.4. Hashes of Hashes (Programming Perl)
- 
    
    - accessing and printing:  9.4.3. Access and Printing of a Hash of Hashes (Programming Perl)
- generation of:  9.4.2. Generation of a Hash of Hashes (Programming Perl)
 
- multiple values per key:  5.8.1. Problem (Perl Cookbook)
- names for:  2.4. Variables (Programming Perl)
- names of:  5.2. Hash Element Access (Learning Perl)
- output style, changing in debugger:  20.3.3. Debugger Options (Programming Perl)
- package names and:  2.7. Packages as Namespace Separators (Learning Perl Objects, References and Modules)
- passing by reference into or out of functions:  6.3. Passing References (Programming Perl)
- Perl data organization in:  9.1.5. Common Mistakes (Programming Perl)
- presizing:  5.14.1. Problem (Perl Cookbook)
- printing:  5.6.1. Problem (Perl Cookbook)
- processing, functions for:  29.1. Perl Functions by Category (Programming Perl)
- reading and writing records to file:  11.10.1. Problem (Perl Cookbook)
- reasons for using:  5.1.1. Why Use a Hash? (Learning Perl)
- as records:  11.. Records (Perl Cookbook)
- references and:  3.2. Taking a Reference to an Array (Learning Perl Objects, References and Modules)
- 
    -  5.7. Selecting and Altering Complex Data (Learning Perl Objects, References and Modules)
 
- references as elements:  5.13.2. Solution (Perl Cookbook)
- references as keys:  8.5.1. References Don't Work as Hash Keys (Programming Perl)
- references to:  11.3.1. Problem (Perl Cookbook)
- 
    -  8.1. What Is a Reference? (Programming Perl)
 
- representing data relationships:  5.16.1. Problem (Perl Cookbook)
- representing relationships between data:  5.16.2. Solution (Perl Cookbook)
- restricted, implementing:  12.7.5. Using Closures for Private Objects (Programming Perl)
- retrieving in insertion order:  5.7.1. Problem (Perl Cookbook)
- returning key/value pairs:  29.2.30. each (Programming Perl)
- returning values of:  29.2.194. values (Programming Perl)
- scalars and:  3. Introduction to References (Learning Perl Objects, References and Modules)
- %SIG, references to signal handlers:  16.1. Signals (Programming Perl)
- slices and:  17.6.2. Hash Slice (Learning Perl)
- slices of:  4.8.3. Discussion (Perl Cookbook)
- sorting elements:  5.10.1. Problem (Perl Cookbook)
- special (predefined):  4.4.2. Global Special Arrays and Hashes (Perl in a Nutshell)
- storing filehandles:  A.10.1. Exercise (Section 11.8.1) (Learning Perl Objects, References and Modules)
- symbol tables:  10.1. Symbol Tables (Programming Perl)
- 
    
    - key/value pairs in:  10.1. Symbol Tables (Programming Perl)
- typeglobs in:  10.1. Symbol Tables (Programming Perl)
 
- taint in:  23.1. Handling Insecure Data (Programming Perl)
- testing for keys:  5.2.1. Problem (Perl Cookbook)
- ties for:  13.15.5. Tie Example: Make a Hash That Always Appends (Perl Cookbook)
- traversing:  5.5.1. Problem (Perl Cookbook)
- tying:  14. Tied Variables (Programming Perl)
- 
    -  14.3. Tying Hashes (Programming Perl)
- methods for:  14.3.1. Hash-Tying Methods (Programming Perl)
- Tie::Hash module, providing base class definitions:  32.1.14. Convenient Classes (Programming Perl)
 
- unwinding:  5.2.1. The Hash as a Whole (Learning Perl)
 
- Hash::Util module:  8.119. Hash::Util (Perl in a Nutshell)
- HASH(0x1a2b3c):  3.8. References to Hashes (Learning Perl Objects, References and Modules)
- head( )
- 
  
  - LWP::UserAgent:  20.2.3. LWP::UserAgent (Perl in a Nutshell)
- LWP::Simple module:  20.2.2. LWP::Simple (Perl in a Nutshell)
- 
    -  20.2.2. LWP::Simple (Perl in a Nutshell)
 
- Mail::Internet module:  16.2.5. Mail::Internet Reference (Perl in a Nutshell)
- Net::NNTP module:  17.2.2. Net::NNTP Reference (Perl in a Nutshell)
- finding stale hyperlinks:  20.7.2. Solution (Perl Cookbook)
 
- =head2 command (pod):  4.13.1. Paragraph Tags (Perl in a Nutshell)
- HEAD method:  19.. Behind the Scenes (Perl Cookbook)
- header( )
- 
  
  - CGI.pm module:  10.7. CGI.pm Reference (Perl in a Nutshell)
- HTTP::Headers module:  20.3.3. HTTP::Headers (Perl in a Nutshell)
- HTTP::Message module:  20.3.8. HTTP::Message (Perl in a Nutshell)
 
- header files: Glossary (Programming Perl)
- 
  - Glossary (Programming Perl)
- (see also modules)
 
- headers, format names:  7.2. Footers (Programming Perl)
- headers, HTTP:  20.3.3. HTTP::Headers (Perl in a Nutshell)
- headers, interrogating with mod_perl:  21.5.1. Problem (Perl Cookbook)
- -height option
- 
  
  - place geometry manager:  21.2.3. The place Geometry Manager (Perl in a Nutshell)
- widgets:  21.3. Common Widget Configuration Options (Perl in a Nutshell)
 
- hello( ) (Net::SMTP):  16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
- `Hello, world' program:  1.4.1. A Simple Program (Learning Perl)
- HELO command (SMTP):  16.1.2. The SMTP Protocol and the SMTP Session (Perl in a Nutshell)
- help( ) (Net::SMTP):  16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
- here documents:  1.. Introduction (Perl Cookbook)
- 
  -  B.8.2. Here documents (Learning Perl)
-  2.6.6. "Here" Documents (Programming Perl)
- Glossary (Programming Perl)
- end-of-file: Glossary (Programming Perl)
- indentation of:  2.6.6. "Here" Documents (Programming Perl)
- indenting:  1.16.1. Problem (Perl Cookbook)
- semicolon (;), omitting trailing:  24.1.1. Universal Blunders (Programming Perl)
 
- hex( ):  5. Function Reference (Perl in a Nutshell)
- 
-  2.15.2. Solution (Perl Cookbook)
-  29.2.73. hex (Programming Perl)
 
- hexadecimal: Glossary (Programming Perl)
- 
  
  - converting numbers to:  5.2.3. The s/// Operator (Substitution) (Programming Perl)
 
- hexadecimal characters:  2.6.1. Numeric Literals (Programming Perl)
- hexadecimal literals:  2.2.4. Nondecimal Integer Literals (Learning Perl)
- hexadecimal memory address:  3.2. Taking a Reference to an Array (Learning Perl Objects, References and Modules)
- 
  -  3.8. References to Hashes (Learning Perl Objects, References and Modules)
 
- hexadecimal numbers:  29.2.73. hex (Programming Perl)
- 
  
  - character numbers, specifying as:  5.3.2. Specific Characters (Programming Perl)
 
- hexadecimal numbers, converting:  2.15.1. Problem (Perl Cookbook)
- hexdigest( )
- 
  
  - Digest modules:  8.57. Digest (Perl in a Nutshell)
- Digest::MD5 module:  8.58. Digest::MD5 (Perl in a Nutshell)
 
- hidden( ), generating sticky hidden fields:  19.11.3. Discussion (Perl Cookbook)
- hidden( ) (CGI.pm):  10.7. CGI.pm Reference (Perl in a Nutshell)
- Hietaniemi, Jarkko:  2.1. The CPAN Architecture (Perl in a Nutshell)
- high-level programming languages:  1.2.1. Why Didn't Larry Just Use Some Other Language? (Learning Perl)
- 
  -  1.2.2. Is Perl Easy or Hard? (Learning Perl)
 
- high-precision numbers:  B.9.3. Large and High-Precision Numbers (Learning Perl)
- high-resolution timers:  3.9.1. Problem (Perl Cookbook)
- -highlightbackground option (widgets):  21.3. Common Widget Configuration Options (Perl in a Nutshell)
- -highlightcolor option (widgets):  21.3. Common Widget Configuration Options (Perl in a Nutshell)
- -highlightthickness option (widgets):  21.3. Common Widget Configuration Options (Perl in a Nutshell)
- hints, compiler:  28.2. Special Variables in Alphabetical Order (Programming Perl)
- history, command:  20.1. Using the Debugger (Programming Perl)
- history of Perl:  27.1. History Made Practical (Programming Perl)
- history.db file, grepping:  14.19. Program: ggh—Grep Netscape Global History (Perl Cookbook)
- home directory:  12.1. Moving Around the Directory Tree (Learning Perl)
- 
  -  29.2.9. chdir (Programming Perl)
- Glossary (Programming Perl)
 
- home page, Perl:  0.6.1. Perl on the Web (Programming Perl)
- HOME variable:  3.3. Environment Variables (Perl in a Nutshell)
- 
  -  19.2. Environment Variables (Programming Perl)
 
- hopdelta program:  3.11. Program: hopdelta (Perl Cookbook)
- host( )
- 
  
  - Mail::Address module:  16.2.6. Parse Email Addresses with Mail::Address (Perl in a Nutshell)
- 
    -  16.2.7. Mail::Address Reference (Perl in a Nutshell)
 
- URI::URL module:  20.5.3. URI::URL (Perl in a Nutshell)
 
- hostname function:  B.5.10. The Sys::Hostname Module (Learning Perl)
- hostnames
- 
  
  - getting from network addresses:  29.2.47. gethostbyaddr (Programming Perl)
- identifying at socket end:  17.7.2. Solution (Perl Cookbook)
- obtaining your own:  17.8.1. Problem (Perl Cookbook)
- Sys::Hostname module:  32.1.7. Operating System Interfaces (Programming Perl)
- translating to addresses:  29.2.48. gethostbyname (Programming Perl)
- 
    -  29.2.52. getnetbyname (Programming Perl)
 
 
- hostpath (IO::Socket::UNIX):  15.2.5. IO::Socket::UNIX Reference (Perl in a Nutshell)
- hosts: Glossary (Programming Perl)
- hosts file (see /etc/hosts file)
- hosts (remote), checking for reachability:  32.1.8. Networking and Interprocess Communication (Programming Perl)
- host_wait( ) (LWP::RobotUA):  20.2.1. LWP::RobotUA Sections (Perl in a Nutshell)
- HotKey module:  15.8.3. Description (Perl Cookbook)
- hours (see date and time values)
- household appliances, Perl modules for:  22.1. The CPAN modules Directory (Programming Perl)
- h2ph tool, translating C header files:  12.17.1. Problem (Perl Cookbook)
- hpush( ):  10.11.3.2. Mimicking built-ins (Perl Cookbook)
- HREF fields, substitutions for:  20.21. Program: hrefsub (Perl Cookbook)
- hrefsub program:  20.21. Program: hrefsub (Perl Cookbook)
- HTML
- 
  
  - CGI module, generation of:  32.1.9. World Wide Web (Programming Perl)
- code, producing nicely formatted:  32.1.9. World Wide Web (Programming Perl)
- converting ASCII to and from:  20.4.1. Problem (Perl Cookbook)
- extracting tags:  20.6.1. Problem (Perl Cookbook)
- extracting URLs from:  20.3.1. Problem (Perl Cookbook)
- finding stale or fresh links:  20.7.1. Problem (Perl Cookbook)
- parsing:  20.18.1. Problem (Perl Cookbook)
- Perl modules for:  22.1. The CPAN modules Directory (Programming Perl)
- pod files, converting to:  32.1.16. Documentation Support (Programming Perl)
- putting links around URLs:  6.21. Program: urlify (Perl Cookbook)
- shortcuts, formatting lists and tables with:  19.6.1. Problem (Perl Cookbook)
- tables in, extracting data from:  20.19.1. Problem (Perl Cookbook)
- templates:  20.9.1. Problem (Perl Cookbook)
- text substitutions:  20.20. Program: htmlsub (Perl Cookbook)
- XML and:  22.. Introduction (Perl Cookbook)
 
- HTML forms:  19.. HTML and Forms (Perl Cookbook)
- 
  
  - accessing parameters with mod_perl:  21.6.1. Problem (Perl Cookbook)
- automating submission:  20.2.1. Problem (Perl Cookbook)
- Boolean connectives in patterns:  6.18.1. Problem (Perl Cookbook)
- saving and mailing:  19.12.1. Problem (Perl Cookbook)
- sticky widgets:  19.10.1. Problem (Perl Cookbook)
 
- HTML (Hypertext Markup Language)
- 
  
  - tags, generating with CGI.pm:  10.1. HTML Tag Generation (Perl in a Nutshell)
- translating pod to:  4.13.3. Pod Utilities (Perl in a Nutshell)
- 
    -  8.174. Pod::Html (Perl in a Nutshell)
 
 
- :html method groups:  10.2. Importing Method Groups (Perl in a Nutshell)
- HTML modules:  20.4. The HTML Modules (Perl in a Nutshell)
- 
  
  - HTML::Element module:  20.4.3. HTML::Element (Perl in a Nutshell)
- HTML::FormatPS module:  20.4.5. HTML::FormatPS (Perl in a Nutshell)
- HTML::FormatText module:  20.4.6. HTML::FormatText (Perl in a Nutshell)
- HTML::Parser module:  20.4. The HTML Modules (Perl in a Nutshell)
- 
    -  20.4.1. HTML::Parser (Perl in a Nutshell)
 
- HTML::TreeBuilder module:  20.4.4. HTML::TreeBuilder (Perl in a Nutshell)
 
- HTML::FormatText module:  20.5.3. Discussion (Perl Cookbook)
- HTML::LinkExtor module:  20.3.2. Solution (Perl Cookbook)
- HTML::Mason module:  21.16.1. Problem (Perl Cookbook)
- 
  
  - autohandlers:  21.16.3.4. Autohandlers (Perl Cookbook)
- configuration:  21.16.3.1. Configuration (Perl Cookbook)
- dhandlers:  21.16.3.5. Dhandlers (Perl Cookbook)
- 
    -  21.16.3.5. Dhandlers (Perl Cookbook)
 
- Mason syntax:  21.16.3.2. Basic Mason syntax (Perl Cookbook)
- objects:  21.16.3.3. Objects (Perl Cookbook)
 
- htmlsub program:  20.20. Program: htmlsub (Perl Cookbook)
- HTML::TableContentParser module:  20.19.2. Solution (Perl Cookbook)
- HTML::TextToHTML module:  20.4.3. Discussion (Perl Cookbook)
- HTML::TokeParser module:  20.18.3. Discussion (Perl Cookbook)
- HTTP
- 
  
  - cookies, setting and getting:  32.1.9. World Wide Web (Programming Perl)
- Perl modules for:  22.1. The CPAN modules Directory (Programming Perl)
 
- HTTP (Hypertext Transfer Protocol)
- 
  
  - links, searching for:  1.7. Regular Expressions (Programming Perl)
- request messages:  20.1. LWP Overview (Perl in a Nutshell)
- Win32::Internet functions for:  22.7.3. HTTP Functions (Perl in a Nutshell)
 
- HTTP methods:  19.. Behind the Scenes (Perl Cookbook)
- 
  -  19.1.3. Discussion (Perl Cookbook)
 
- HTTP modules
- 
  
  - 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::Daemon::ClientConn module:  20.3.7.1. HTTP::Daemon::ClientConn methods (Perl in a Nutshell)
- HTTP::Date module:  20.3.5. HTTP::Date (Perl in a Nutshell)
- HTTP::Headers module:  20.3.3. HTTP::Headers (Perl in a Nutshell)
- HTTP::Message module:  20.3.8. HTTP::Message (Perl in a Nutshell)
- HTTP::Request module:  20.1. LWP Overview (Perl in a Nutshell)
- 
    -  20.3.1. HTTP::Request (Perl in a Nutshell)
 
- HTTP::Response module:  20.1. LWP Overview (Perl in a Nutshell)
- 
    -  20.3.2. HTTP::Response (Perl in a Nutshell)
 
- HTTP::Status module:  20.3.4. HTTP::Status (Perl in a Nutshell)
 
- HTTP( ) (Win32::Internet):  22.7.1. General Internet Methods (Perl in a Nutshell)
- HTTP::Cookies module:  20.14.3. Discussion (Perl Cookbook)
- HTTP::Response module:  20.1.3. Discussion (Perl Cookbook)
- hubris: Glossary (Programming Perl)
- HV (internal hash value):  21.2. Internal Data Types (Programming Perl)
- 
  - Glossary (Programming Perl)
 
- h2xs tool:  22.3. Creating CPAN Modules (Programming Perl)
- 
-  12.9.2. Solution (Perl Cookbook)
- distributions and:  13.1. Starting with h2xs (Learning Perl Objects, References and Modules)
- Makefile.PL and:  13.5. Controlling the Distribution with Makefile.PL (Learning Perl Objects, References and Modules)
- making a module with C code:  12.18.1. Problem (Perl Cookbook)
- multiple test scripts and:  14.5. More Complex Tests (Multiple Test Scripts) (Learning Perl Objects, References and Modules)
-  21.3.1. XS and XSUBs (Programming Perl)
-  21.3.2. Creating Extensions (Programming Perl)
 
- hyperlinks
- 
  
  - clearing link list:  20.3.3. Discussion (Perl Cookbook)
- extracting from HTML:  20.3.1. Problem (Perl Cookbook)
- finding stale or fresh:  20.7.1. Problem (Perl Cookbook)
 
- hyphen (-)
- 
  
  - -0 command-line option:  8.. Basic Operations (Perl Cookbook)
- -a command-line option, writing filters:  7.14.3.2. Command-line options (Perl Cookbook)
- in [...] construct:  4.6.4. Character Classes (Perl in a Nutshell)
- -e command-line option, writing filters:  7.14.3.2. Command-line options (Perl Cookbook)
- -> (arrow) operator:  11.. References (Perl Cookbook)
- 
    -  13.. Methods (Perl Cookbook)
-  4.5.1. The Arrow Operator (Perl in a Nutshell)
- dereferencing with:  4.8.2.1. Arrow dereferencing (Perl in a Nutshell)
 
- -> (infix) notation:  11.. References (Perl Cookbook)
- -i command-line option
- 
    
    - modifying files with:  7.16.2. Solution (Perl Cookbook)
- writing filters:  7.14.3.2. Command-line options (Perl Cookbook)
 
- -I command-line switch:  12.8.2. Solution (Perl Cookbook)
- -n command-line option, writing filters:  7.14.3.2. Command-line options (Perl Cookbook)
- -p command-line option
- 
    
    - modifying files with:  7.16.2. Solution (Perl Cookbook)
- writing filters:  7.14.3.2. Command-line options (Perl Cookbook)
 
- -t command-line option:  15.2.2. Solution (Perl Cookbook)
- arithmetic negation operator:  4.5.2. Unary Operators (Perl in a Nutshell)
- grid geometry manager placeholder:  21.2.2. The grid Geometry Manager (Perl in a Nutshell)
- indicating standard input stream:  6.2. Input from the Diamond Operator (Learning Perl)
- Perl debugger command:  6.2. Debugger Commands (Perl in a Nutshell)
- specifying range of characters:  8.1. Character Classes (Learning Perl)
- -= (assignment) operator:  4.5.6. Assignment Operators (Perl in a Nutshell)
- -- (autodecrement) operator:  4.5.5. Autoincrement and Autodecrement (Perl in a Nutshell)
 
- hyphenating text, Perl module for:  22.1. The CPAN modules Directory (Programming Perl)
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