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Index: E

• -e file test operator
• • Learning Perl, 10.5. The -x File Tests
  • Learning Perl on Win32 Systems, 10.6. The -x File Tests
  • Perl tutorial, 4.5.8. File Test Operators
  • Perl Developing, 2.5.10. Named Unary and File Test Operators
• E<> interior sequence (pod) : Perl tutorial, 4.11.2. Interior sequences
• -E option (dprofpp) : Perl tutorial, 6.5. The Perl Profiler
• -e option (perlbug) : Perl tutorial, 6.6. The perlbug Program
• -e option (perlcc) : Perl tutorial, 3.4. The Perl Compiler
• /e pattern-match modifier
• • Advanced Perl Developing, 5.4.1. Expression Evaluation in Substitutions
  • Perl tutorial, 1.8. Expanding Variables in User Input
  • Perl tutorial, 6.0. Introduction
  • Perl tutorial, 6.4. Commenting Regular Expressions
  • Perl tutorial, 7.7. Writing a Filter
  • Learning Perl, D.5.2. The eval Operator (and s///e)
  • Perl Developing, 2.4.2. Pattern-Matching Operators
• (escape) sequence : Perl tutorial, 4.6.3. Escaped Sequences
• string metacharacter : Perl tutorial, 1.13. Escaping Characters
• -e switch, perl
• • Advanced Perl Developing, 5.1. The String Form: Expression Evaluation
  • Learning Perl, 17.5. Variable-Length (Text) Databases
  • Perl tutorial, 3.2. Command-Line Options
  • Perl Developing, 6.1.2. Switches
• each()
• • Perl tutorial, 5.10. Merging Hashes
  • Learning Perl, 5.4.3. The each Function
  • Perl tutorial, Chapter 5, Reference: each
  • Perl Developing, 3.2.30. each
  • Perl Developing, 5.4.3. Tying Hashes
  • examples of
  • • Learning Perl, A.16. Chapter 17, User Database Manipulation
    • Learning Perl, 17.3. Using a DBM Hash
    • Learning Perl on Win32 Systems, 17.3. Using a DBM Hash
• eager pattern matching : Perl tutorial, 6.0. Introduction
• ebcdic() (Net::FTP) : Perl tutorial, Chapter 16, Reference: ebcdic
• echo command
• • globbing and : Learning Perl, 12.2. Globbing
  • password input : Perl tutorial, 15.10. Reading Passwords
• editing files : (see file contents)
• editing input : Perl tutorial, 15.11. Editing Input
• editor support for debugger : Perl Developing, 8.1.5. Editor Support for Debugging
• editors, and updating databases : Learning Perl, 17.5. Variable-Length (Text) Databases
• /ee substitution modifier
• • Perl tutorial, 1.8. Expanding Variables in User Input
  • Perl tutorial, 6.4. Commenting Regular Expressions
• effective gid : (see $ variables, $) variable)
• effective uid : (see $ variables, $)
• $EFFECTIVE_GROUP_ID ($)) variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• $EFFECTIVE_USER_ID ($>) variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• efficiency : (see performance)
• $EGID ($() variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• element references : Advanced Perl Developing, 1.6.2. Array/Hash References Versus Element References
• -elementborderwidth option (Scrollbar) : Perl tutorial, 18.9. The Scrollbar Widget
• elements of array
• • Learning Perl, 3.1. What Is a List or Array?
  • Learning Perl on Win32 Systems, 3.1. What Is a List or Array?
• elements of arrays : (see arrays)
• elements of hashes : (see hashes)
• else keyword : (see if statement)
• elsif keyword
• • (see also if statement)
  • Learning Perl, 1.5.5. More than One Secret Word
  • Learning Perl, 4.2. The if/unless Statement
  • Learning Perl on Win32 Systems, 1.6.5. More than One Secret Word
  • Learning Perl on Win32 Systems, 4.2. The if/unless Statement
  • examples of
  • • Learning Perl, A.3. Chapter 4, Control Structures
    • Learning Perl, 15.4. Advanced Sorting
    • Learning Perl on Win32 Systems, A.3. Chapter 4, Control Structures
    • Learning Perl on Win32 Systems, 15.4. Advanced Sorting
• Emacs, debugger and : Perl Developing, 8.1.5. Editor Support for Debugging
• email : Perl tutorial, 14. Email Connectivity
• • folders for (Mail::Folder module) : Perl tutorial, 14.2.3. Handle Folders with Mail::Folder
  • handling messages (Mail::Internet module)
  • • Learning Perl, 9.1. The last Statement
    • Perl tutorial, 14.2.4. Handle Messages with Mail::Internet
  • header control (Mail::Send module) : Perl tutorial, 14.2.2. Better Header Control with Mail::Send
  • Mail modules
  • • Perl tutorial, 14. Email Connectivity
    • Perl tutorial, 14.2. The Mail Modules
  • matching valid addresses : Perl tutorial, 6.19. Matching a Valid Mail Address
  • parsing addresses (Mail::Address module) : Perl tutorial, 14.2.6. Parse Email Addresses with Mail::Address
  • Perl-related mailing lists : Perl tutorial, 1.4.3. Mailing Lists
  • random signatures : Perl tutorial, 16.22. Program: sigrand
  • reading with POP3
  • • Perl tutorial, 18.5. Reading Mail with POP3
    • Perl tutorial, 14.1.3. Retrieving Email with Net::POP3
    • Perl tutorial, 14.2.8. Reading Email with Mail::POP3Client
  • sending
  • • Perl tutorial, 18.3. Sending Mail
    • Perl tutorial, 14.1.1. Send Email with Net::SMTP
    • Perl tutorial, 14.2.1. Send Email with Mail::Mailer
  • sending HTML forms via : Perl tutorial, 19.13. Saving a Form to a File or Mail Pipe
  • sorting (example subroutine) : Perl tutorial, 10.17. Program: Sorting Your Mail
  • tracking time path of : Perl tutorial, 3.11. Program: hopdelta
• Embed module : Advanced Perl Developing, 19.4. Adding Extensions
• embedding Perl
• • Advanced Perl Developing, 19. Embedding Perl:The Easy Way
  • Advanced Perl Developing, 20.6. Easy Embedding API
  • Learning Perl, 19.10.2. Embedded Perl
  • Learning Perl on Win32 Systems, D.10. Embeddible, Extensible
  • macros for : Advanced Perl Developing, 20.4.1. Calling a Perl Subroutine
  • in messages : Perl tutorial, 3.2. Command-Line Options
• emit_open_file procedure : Advanced Perl Developing, 17.4.2. Template Parser
• emit_opening_statement procedure : Advanced Perl Developing, 17.4.2. Template Parser
• empty array : Learning Perl, 3.2. Literal Representation
• empty base class test : Perl tutorial, 13.9. Writing an Inheritable Class
• empty list : Learning Perl, 3.2. Literal Representation
• • clearing out a hash : Learning Perl, 5.4.2. The values Function
  • as default value for array variable : Learning Perl, 3.3. Variables
  • getpwent() return value : Learning Perl, 16.1. Getting Password and Group Information
• empty string ("") : Perl tutorial, 1.0. Introduction
• enablecache() routine : Perl Developing, 7.2.4. Benchmark - Check and Compare Running Times of Code
• encapsulation
• • Advanced Perl Developing, 7.1. OO: An Introduction
  • Advanced Perl Developing, 7.2.8. Accessor Methods
  • Advanced Perl Developing, 11.2.2. Object Encapsulation
  • Perl Developing, 4.3.4. Using Object Methods
• encoding URLs : Perl tutorial, 9.2. URL Encoding
• encodings, multiple-byte : Perl tutorial, 6.18. Matching Multiple-Byte Characters
• encryption
• • Perl Developing, 3.2.22. crypt
  • Perl Developing, 6.3.2.2. Penguin
• End() (Response object, PerlScript) : Perl tutorial, 20.2.2.3. Response methods
• END block
• • Advanced Perl Developing, 6.3. Package Initialization and Destruction
  • Perl Developing, 5.1.2. Package Constructors and Destructors: BEGIN and END
• =end command (pod) : Perl tutorial, Chapter 4, Reference: =end
• end index
• • Entry widget : Perl tutorial, 18.8.1. Text Indexes
  • Listbox widget : Perl tutorial, 18.10.1. Listbox Indexes
  • Menu widget : Perl tutorial, 18.15.1. Menu Indexes
  • Text widget : Perl tutorial, 18.11.1. Text Indexes and Modifiers
• end of file : Perl Developing, 3.2.31. eof
• • Control-D as : Learning Perl, 3.6. <STDIN> as an Array
  • detecting
  • • Learning Perl, 1.5.10. Moving the Secret Word List into a Separate File
    • Learning Perl on Win32 Systems, 1.6.10. Moving the Secret Word List into a Separate File
  • with Control-D : Learning Perl on Win32 Systems, 3.6. <STDIN> as an Array
• =end pod directive : Perl tutorial, 12.16. Documenting Your Module with Pod
• __END__ token
• • Perl tutorial, 7.6. Storing Files Inside Your Program Text
  • Perl tutorial, 4.4.4. Global Special Constants
  • Perl Developing, 2.3.2.7. Other literal tokens
  • Perl Developing, 2.9.5. Global Special Filehandles
• end tokens : Learning Perl, 19.3. Simplest CGI Program
• endgrent()
• • Learning Perl, 16.1. Getting Password and Group Information
  • Perl tutorial, Chapter 5, Reference: endgrent
  • Perl Developing, 3.2.44. getgrent
• endhostent()
• • Perl tutorial, Chapter 5, Reference: endhostent
  • Perl Developing, 3.2.49. gethostent
• ending : (see terminating)
• endless loop : (see infinite loops)
• endnetent() : Perl tutorial, Chapter 5, Reference: endnetent
• endprotoent()
• • Perl tutorial, Chapter 5, Reference: endprotoent
  • Perl Developing, 3.2.60. getprotoent
• endpwent()
• • Learning Perl, 16.1. Getting Password and Group Information
  • Perl tutorial, Chapter 5, Reference: endpwent
  • Perl Developing, 3.2.61. getpwent
• endservent()
• • Perl tutorial, Chapter 5, Reference: endservent
  • Perl Developing, 3.2.66. getservent
• endtag() (HTML::Parser) : Perl tutorial, Chapter 17, Reference: endtag
• English module
• • Perl tutorial, 8.45. English
  • Perl Developing, 7.2.76. vars - Predeclare Global Variable Names
  • Perl Developing, 8.2.3. Awk Traps
• Entry widgets (Perl/Tk)
• • Advanced Perl Developing, A.3. Entry
  • Advanced Perl Developing, 14.3.5.5. The entry widget
  • Perl tutorial, 18.8. The Entry Widget
• entrycget()
• • Menu widget : Perl tutorial, 18.15.2. Menu Methods
  • Menubutton widget : Perl tutorial, 18.14.2. Menubutton Methods
• entryconfigure()
• • Menu widget : Perl tutorial, 18.15.2. Menu Methods
  • Menubutton widget : Perl tutorial, 18.14.2. Menubutton Methods
• EnumerateRights() (Win32::FileSecurity) : Perl tutorial, Chapter 19, Reference: EnumerateRights
• %ENV hash
• • Learning Perl, 14.1. Using system and exec
  • Perl tutorial, 4.4.2. Global Special Arrays and Hashes
  • Perl Developing, 2.9.4. Global Special Arrays
  • deleting from : Perl Developing, 3.2.26. delete
• Env module
• • Advanced Perl Developing, 6.5.1. How Do use and Exporter Work?
  • Advanced Perl Developing, 9.3. Tying Hashes
  • Perl tutorial, 8.46. Env
  • Perl Developing, 7.2.14. Env - Import Environment Variables
• env_proxy() (LWP::UserAgent) : Perl tutorial, Chapter 17, Reference: env_proxy
• environment variables
• • Perl tutorial, 3.3. Environment Variables
  • Perl Developing, 2.9.4. Global Special Arrays
  • CGI-related : Perl tutorial, 9.4. CGI Environment Variables
  • controlling through %ENV : Learning Perl, 14.1. Using system and exec
  • DBI-related : Perl tutorial, 12.4. DBI Environment Variables
  • importing : Perl Developing, 7.2.14. Env - Import Environment Variables
• eof
• • Learning Perl, 19.8.2. Objects in CGI.pm
  • Perl tutorial, Chapter 5, Reference: eof
  • Perl Developing, 3.2.31. eof
  • Perl Developing, 8.3.1. Time Efficiency
  • HTML::Parser module : Perl tutorial, Chapter 17, Reference: eof
• eparams() (URI::URL) : Perl tutorial, Chapter 17, Reference: eparams
• epath() (URI::URL) : Perl tutorial, Chapter 17, Reference: epath
• Epoch : (see date and time)
• eq (equal to) operator
• • Learning Perl, 2.4.2. Operators for Strings
  • Perl tutorial, 4.5.4.2. Equality operators
  • Perl Developing, 8.2.1. Universal Blunders
  • examples of
  • • Learning Perl, 1.5.3. Adding Choices
    • Learning Perl, 1.5.17. The Final Programs
    • Learning Perl on Win32 Systems, 1.6.3. Adding Choices
    • Learning Perl on Win32 Systems, 1.6.17. The Final Programs
• eq() (URI::URL) : Perl tutorial, Chapter 17, Reference: eq
• equal sign : (see = (equal sign))
• equality operators
• • Perl tutorial, 4.5.4.2. Equality operators
  • Perl Developing, 2.5.12. Equality Operators
• equery() (URI::URL) : Perl tutorial, Chapter 17, Reference: equery
• erasing : (see deleting)
• err() (DBI) : Perl tutorial, Chapter 12, Reference: err
• Errno module : Perl tutorial, 8.47. Errno
• $ERRNO ($!) variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• Error() (Win32::Internet) : Perl tutorial, Chapter 19, Reference: Error
• error messages
• • Perl Developing, 7.2.5. Carp - Generate Error Messages
  • Perl Developing, 8.3.6. User Efficiency
  • Perl Developing, 8.4. Developing with Style
  • Perl Developing, 9. Diagnostic Messages
• Error module : Learning Perl on Win32 Systems, B.4. Win32 Extensions
• error_as_HTML() (HTTP::Response) : Perl tutorial, Chapter 17, Reference: error_as_HTML
• errors
• • (see also exceptions)
  • Advanced Perl Developing, 5.2. The Block Form: Exception Handling
  • Perl Developing, 9. Diagnostic Messages
  • $@ variable for : Perl Developing, 2.9.3. Global Special Variables
  • $! variable for : Perl Developing, 2.9.3. Global Special Variables
  • $? variable for : Perl Developing, 2.9.3. Global Special Variables
  • CGI scripts
  • • Perl tutorial, 19.0. Introduction
    • Perl tutorial, 19.2. Redirecting Error Messages
    • Perl tutorial, 19.3. Fixing a 500 Server Error
  • controlling for other programs : Perl tutorial, 16.9. Controlling the Input, Output, and Error of Another Program
  • creating uniform DBI numbers : Advanced Perl Developing, 10.4.1.6. What DBI does not provide
  • eval function and : Advanced Perl Developing, 5.1. The String Form: Expression Evaluation
  • exceptions in subroutines : Perl tutorial, 10.12. Handling Exceptions
  • handling permissions for processes : Perl Developing, 7.2.40. IPC::Open3 - Open a Process for Reading, Writing, and Error Handling
  • reading STDERR from programs : Perl tutorial, 16.7. Reading STDERR from a Program
  • reporting filenames in : Perl tutorial, 7.4. Making Perl Report Filenames in Errors
  • reporting like built-ins : Perl tutorial, 12.12. Reporting Errors and Warnings Like Built-Ins
  • returning failure from subroutines : Perl tutorial, 10.10. Returning Failure
  • trapping in require/use statements : Perl tutorial, 12.2. Trapping Errors in require or use
  • trapping undefined function calls : Perl tutorial, 10.15. Trapping Undefined Function Calls with AUTOLOAD
  • web server error log
  • • Perl tutorial, 19.0. Introduction
    • Perl tutorial, 20.13. Processing Server Logs
  • when parsing files : Advanced Perl Developing, 6.3. Package Initialization and Destruction
• errstr() (DBI) : Perl tutorial, Chapter 12, Reference: errstr
• escape_from() (Mail::Internet) : Perl tutorial, Chapter 14, Reference: escape_from
• escaped sequences
• • Perl tutorial, 1.13. Escaping Characters
  • Perl tutorial, 4.6.3. Escaped Sequences
  • Perl Developing, 2.3.2.2. String literals
• /etc/group file
• • Perl Developing, 3.2.44. getgrent
  • Perl Developing, 8.3.1. Time Efficiency
• /etc/hosts file : Perl Developing, 3.2.49. gethostent
• /etc/networks file : Perl Developing, 3.2.53. getnetent
• /etc/passwd file
• • Perl Developing, 3.2.61. getpwent
  • Perl Developing, 8.3.1. Time Efficiency
• /etc/services file : Perl Developing, 3.2.66. getservent
• /etc/utmp file : Perl Developing, 3.2.50. getlogin
• $EUID ($>) variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• Ev function : Advanced Perl Developing, 14.6.2. Event Details
• $EVAL_ERROR variable : Advanced Perl Developing, 5.1. The String Form: Expression Evaluation
• eval function
• • Advanced Perl Developing, B.7. Exception Handling
  • Learning Perl, D.5.2. The eval Operator (and s///e)
  • Learning Perl, 11.1. What Is a Format?
  • Learning Perl on Win32 Systems, D.5.2. The eval Operator (and s///e)
  • Learning Perl on Win32 Systems, 11.1. What Is a Format?
  • Perl tutorial, Chapter 5, Reference: eval
  • Perl Developing, 3.2.32. eval
  • Perl Developing, 4. References and Nested Data Structures
  • Perl Developing, 8.3.1. Time Efficiency
  • die function and : Perl Developing, 3.2.27. die
  • exception handling with : Advanced Perl Developing, 5.2. The Block Form: Exception Handling
  • expression evaluation with
  • • Advanced Perl Developing, 5.1. The String Form: Expression Evaluation
    • Advanced Perl Developing, 5.4. Using Eval for Expression Evaluation
  • improving preformance with : Advanced Perl Developing, 5.5. Using Eval for Efficiency
  • loops and : Perl Developing, 8.3.1. Time Efficiency
  • other languages and : Advanced Perl Developing, 5.7. Eval in Other Languages
  • with require/use statement : Perl tutorial, 12.2. Trapping Errors in require or use
  • quotation marks and : Advanced Perl Developing, 5.3. Watch Your Quotes
  • security and : Advanced Perl Developing, 5.1. The String Form: Expression Evaluation
  • in substitution
  • • Perl tutorial, 1.8. Expanding Variables in User Input
    • Perl tutorial, 6.0. Introduction
    • Perl tutorial, 6.4. Commenting Regular Expressions
  • for time-outs : Advanced Perl Developing, 5.6. Using Eval for Time-Outs
  • translating with variables : Perl Developing, 2.4.2. Pattern-Matching Operators
• $EVAL_ERROR ($@) variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• EventLog module : Learning Perl on Win32 Systems, B.4. Win32 Extensions
• events
• • event details : Advanced Perl Developing, 14.6.2. Event Details
  • event loops
  • • Msg module : Advanced Perl Developing, 13.1.1.4. Msg: Event loop routines
    • Perl/Tk and : Advanced Perl Developing, 14.2. Starting with Perl/Tk
    • widgets and : Advanced Perl Developing, 14.7. Event Loops
  • modifiers of : Advanced Perl Developing, 14.6. Event Bindings
  • multiple bindings to : Advanced Perl Developing, 14.6.1. Multiple Bindings
  • Tk resize : Perl tutorial, 15.16. Responding to Tk Resize Events
  • widget event bindings : Advanced Perl Developing, 14.6. Event Bindings
• example Perl scripts
• • Advanced Perl Developing, FTP
  • Learning Perl on Win32 Systems, Exercises
  • Perl tutorial, 2.3.1.1. Perl examples
  • Perl Developing, 8.5.2. Examples
• exceptions : Advanced Perl Developing, B.7. Exception Handling
• • die function for : Perl Developing, 3.2.27. die
  • Exception.pm module : Advanced Perl Developing, 5.2.1.1. Exception.pm
  • exceptions.pl module : Advanced Perl Developing, 5.2.1.2. exceptions.pl
  • handling in subroutines : Perl tutorial, 10.12. Handling Exceptions
  • handling with eval : Advanced Perl Developing, 5.2. The Block Form: Exception Handling
  • modules for : Advanced Perl Developing, 5.2.1. Standard Modules
  • other languages and : Advanced Perl Developing, 5.7. Eval in Other Languages
  • SWIG and : Advanced Perl Developing, 18.3. SWIG Features
  • trapping undefined function calls : Perl tutorial, 10.15. Trapping Undefined Function Calls with AUTOLOAD
• exclamation point : (see ! (bang))
• exclusive locks : Perl tutorial, 7.11. Locking a File
• exclusive OR operator
• • Perl Developing, 2.5.13. Bitwise Operators
  • Perl Developing, 2.5.20. Logical and, or, not, and xor
  • Perl Developing, 8.2.3. Awk Traps
• exec()
• • Perl tutorial, 16.0. Introduction
  • Perl tutorial, 16.3. Replacing the Current Program with a Different One
  • Perl tutorial, 19.6. Executing Commands Without Shell Escapes
  • Learning Perl, 14.4. Using fork
  • Perl tutorial, Chapter 5, Reference: exec
  • Perl Developing, 3.2.33. exec
• $EXECUTABLE_NAME ($^X) variable
• • Perl tutorial, 4.4.1. Global Special Variables
  • Perl Developing, 2.9.3. Global Special Variables
  • Perl Developing, 7.2.13. English - Use English or awk Names for Punctuation Variables
• execute bits
• • Learning Perl, 1.4. Basic Concepts
  • Learning Perl on Win32 Systems, 13.4. Modifying Permissions
• execute() (DBI)
• • Perl tutorial, Chapter 12, Reference: execute
  • Perl tutorial, 12.2.3. Database Handles and Statement Handles
• executing
• • format : Learning Perl, 11.3. Invoking a Format
  • methods : Perl Developing, 5.3.6. Method Invocation
  • other programs from Perl : Perl Developing, 3.2.167. system
  • Perl programs
  • • Perl Developing, 1.3.1. How to Do It
    • Perl Developing, 6.1. Cooperating with Command Interpreters
  • subroutines : Learning Perl, 8.2. Invoking a User Function
• executor : Advanced Perl Developing, 20.2.3. Executor
• execv function (in C) : Perl Developing, 3.2.33. exec
• execvp function (in C) : Perl Developing, 3.2.33. exec
• exists()
• • Perl tutorial, 5.1. Adding an Element to a Hash
  • Perl tutorial, Chapter 5, Reference: exists
  • Perl Developing, 3.2.34. exists
  • Perl Developing, 5.4.3. Tying Hashes
  • multiple hash key values : Perl tutorial, 5.7. Hashes with Multiple Values Per Key
  • News::Newsrc module : Perl tutorial, Chapter 15, Reference: exists
• EXISTS method : Perl Developing, 5.4.3. Tying Hashes
• exit()
• • Learning Perl, 14.4. Using fork
  • Learning Perl on Win32 Systems, 14.3. Using Processes as Filehandles
  • Perl tutorial, Chapter 5, Reference: exit
  • Perl tutorial, 11.4. Running CGI Scripts with mod_perl
  • Perl Developing, 3.2.35. exit
  • Perl Developing, 3.2.40. fork
• exit statement (awk) : Perl Developing, 6.4.2.2. a2p
• exit status, die() and
• • Learning Perl, 10.3. A Slight Diversion: die
  • Learning Perl on Win32 Systems, 10.4. A Slight Diversion: die
• exit value
• • Learning Perl, 14.4. Using fork
  • Learning Perl on Win32 Systems, 14.3. Using Processes as Filehandles
• exiting
• • diagnostics module : Perl Developing, 7.2.10. diagnostics - Force Verbose Warning Diagnostics
  • infinite loop : Perl Developing, 2.6.4.2. For loops
• exp()
• • Perl tutorial, Chapter 5, Reference: exp
  • Perl Developing, 3.2.36. exp
• expand() (Net::SMTP) : Perl tutorial, Chapter 14, Reference: expand
• -expand option (pack geometry manager) : Perl tutorial, 18.2.1. The pack Geometry Manager
• ExpandEnvironmentStrings module : Learning Perl on Win32 Systems, B.4. Win32 Extensions
• expanding tabs : Perl tutorial, 1.7. Expanding and Compressing Tabs
• expanding variables in user input : Perl tutorial, 1.8. Expanding Variables in User Input
• expansion, filename : Perl Developing, 3.2.69. glob
• Expect module : Perl tutorial, 15.13. Controlling Another Program with Expect
• experts, and reading introductory sections : Learning Perl on Win32 Systems, 1.6.8. Making It Fair for the Rest
• Expires property (response cookies)
• • Perl tutorial, 20.2.2.1. Setting cookies
  • Perl tutorial, 20.2.2.2. Response properties
• ExpiresAbsolute property (Response object) : Perl tutorial, 20.2.2.2. Response properties
• expn program (example) : Perl tutorial, 18.9. Program: expn and vrfy
• exponential notation, in floating-point numbers : Learning Perl, 2.2.2. Float Literals
• exponentiation (**) operator
• • Learning Perl, 2.4.1. Operators for Numbers
  • Perl tutorial, 4.5.3. Arithmetic Operators
  • Perl Developing, 2.5.4. Exponentiation
  • Perl Developing, 8.2.3. Awk Traps
• @EXPORT array (use pragma) : Perl tutorial, 12.1. Defining a Module's Interface
• export command, emulating : Learning Perl, 14.1. Using system and exec
• @EXPORT_OK array (use pragma) : Perl tutorial, 12.1. Defining a Module's Interface
• @EXPORT_TAGS array (use pragma) : Perl tutorial, 12.1. Defining a Module's Interface
• Exporter module
• • Advanced Perl Developing, 6.5. Importing Symbols
  • Perl tutorial, 12.0. Introduction
  • Perl tutorial, 12.1. Defining a Module's Interface
  • Perl tutorial, 8.48. Exporter
  • Perl Developing, 7.2.15. Exporter - Default Import Method for Modules
• exporting to modules : Perl tutorial, 12.0. Introduction
• -exportselection option (widgets) : Perl tutorial, 18.3. Common Widget Configuration Options
• expr command (debugger) : Perl Developing, 8.1.1. Debugger Commands
• expressions
• • array literals : Learning Perl, 3.2. Literal Representation
  • evaluation
  • • Advanced Perl Developing, 5.1. The String Form: Expression Evaluation
    • Advanced Perl Developing, 5.4. Using Eval for Expression Evaluation
    • /e flag with substitutions : Advanced Perl Developing, 5.4.1. Expression Evaluation in Substitutions
  • interpolating within strings : Perl tutorial, 1.10. Interpolating Functions and Expressions Within Strings
  • plotting : Advanced Perl Developing, 4.2.2.1. Expression plotting
  • in subroutine body : Learning Perl, 8.3. Return Values
• EXTEND macro : Advanced Perl Developing, 20.4.2.2. Ensuring that the stack is big enough
• extended regular expression syntax : Perl tutorial, 4.6.8. Extended Regular Expressions
• $EXTENDED_OS_ERROR ($^E) variable : Perl tutorial, 4.4.1. Global Special Variables
• extending arrays : Perl Developing, 2.3.4. List Values and Arrays
• extension modules, Perl : Advanced Perl Developing, 19.4. Adding Extensions
• • definition of : Learning Perl on Win32 Systems, B.1. Library Terminology
  • installing : Perl Developing, 7.2.16. ExtUtils::Install - Install Files from Here to There
  • Makefiles for : Perl Developing, 7.2.18. ExtUtils::MakeMaker - Create a Makefile for a Perl Extension
  • Win32, list of : Learning Perl on Win32 Systems, B.4. Win32 Extensions
• extra path information : Perl tutorial, 9.3. Extra Path Information
• extract_cookies() (HTTP::Cookies) : Perl tutorial, Chapter 17, Reference: extract_cookies
• extract_links() (HTML::Parser) : Perl tutorial, Chapter 17, Reference: extract_links
• extracting
• • from arrays : (see arrays)
  • source code
  • • Perl tutorial, 2.3.1. Installing on Unix
    • Perl tutorial, 2.3.2.2. Standard Perl distribution
  • substrings : Perl Developing, 3.2.162. substr
  • URLs from HTML : Perl tutorial, 20.3. Extracting URLs
• ExtUtils modules : Perl tutorial, 8.49. ExtUtils::Command
• • ExtUtils::Command module : Perl tutorial, 8.49. ExtUtils::Command
  • ExtUtils::Embed module
  • • Advanced Perl Developing, 19.4. Adding Extensions
    • Perl tutorial, 8.50. ExtUtils::Embed
  • ExtUtils::Install module
  • • Perl tutorial, 8.51. ExtUtils::Install
    • Perl Developing, 7.2.16. ExtUtils::Install - Install Files from Here to There
  • ExtUtils::Installed module : Perl tutorial, 8.52. ExtUtils::Installed
  • ExtUtils::Liblist module
  • • Perl tutorial, 8.53. ExtUtils::Liblist
    • Perl Developing, 7.2.17. ExtUtils::Liblist - Determine Libraries to Use and How to Use Them
  • ExtUtils::MakeMaker module
  • • Perl tutorial, 8.54. ExtUtils::MakeMaker
    • Perl Developing, 7.2.18. ExtUtils::MakeMaker - Create a Makefile for a Perl Extension
  • ExtUtils::Manifest module
  • • Perl tutorial, 8.55. ExtUtils::Manifest
    • Perl Developing, 7.2.19. ExtUtils::Manifest - Utilities to Write and Check a MANIFEST File
  • ExtUtils::Miniperl module
  • • Perl tutorial, 8.56. ExtUtils::Miniperl
    • Perl Developing, 7.2.20. ExtUtils::Miniperl - Write the C Code for perlmain.c
  • ExtUtils::Mkbootstrap module
  • • Perl tutorial, 8.57. ExtUtils::Mkbootstrap
    • Perl Developing, 7.2.21. ExtUtils::Mkbootstrap - Make a Bootstrap File for Use by DynaLoader
  • ExtUtils::Mksymlists module
  • • Perl tutorial, 8.58. ExtUtils::Mksymlists
    • Perl Developing, 7.2.22. ExtUtils::Mksymlists - Write Linker Option Files for Dynamic Extension
  • ExtUtils::MM_OS2 module
  • • Perl tutorial, 8.59. ExtUtils::MM_OS2
    • Perl Developing, 7.2.23. ExtUtils::MM_OS2 - Methods to Override UNIX Behavior in ExtUtils::MakeMaker
  • ExtUtils::MM_Unix module
  • • Perl tutorial, 8.60. ExtUtils::MM_Unix
    • Perl Developing, 7.2.24. ExtUtils::MM_Unix - Methods Used by ExtUtils::MakeMaker
  • ExtUtils::MM_VMS module
  • • Perl tutorial, 8.61. ExtUtils::MM_VMS
    • Perl Developing, 7.2.25. ExtUtils::MM_VMS - Methods to Override UNIX Behavior in ExtUtils::MakeMaker
  • ExtUtils::MM_WIN32 module : Perl tutorial, 8.62. ExtUtils::MM_Win32
  • ExtUtils::Packlist module : Perl tutorial, 8.63. ExtUtils::Packlist
  • ExtUtils::testlib module : Perl tutorial, 8.64. ExtUtils::testlib

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