Index: E

• string metacharacter : Escaping Characters
• /e substitution modifier
• • Expanding Variables in User Input
  • Introduction
  • Commenting Regular Expressions
  • Writing a Filter
• each( ) : Merging Hashes
• eager pattern matching : Introduction
• echo and password input : Reading Passwords
• editing files : (see file contents)
• editing input : Editing Input
• /ee substitution modifier
• • Expanding Variables in User Input
  • Commenting Regular Expressions
• elements of arrays : (see arrays)
• elements of hashes : (see hashes)
• email
• • matching valid addresses : Matching a Valid Mail Address
  • random signatures : Program: sigrand
  • reading with POP3 : Reading Mail with POP3
  • sending : Sending Mail
  • sending HTML forms via : Saving a Form to a File or Mail Pipe
  • sorting (example subroutine) : Program: Sorting Your Mail
  • tracking time path of : Program: hopdelta
• empty base class test : Writing an Inheritable Class
• empty string ("") : Introduction
• encodings, multiple-byte : Matching Multiple-Byte Characters
• =end pod directive : Documenting Your Module with Pod
• __END__ tokens : Storing Files Inside Your Program Text
• Epoch : (see date and time)
• errors
• • CGI scripts : Introduction
  • • 500 Server Error : Fixing a 500 Server Error
    • redirecting error messages : Redirecting Error Messages
  • controlling for other programs : Controlling the Input, Output, and Error of Another Program
  • exceptions in subroutines : Handling Exceptions
  • reading STDERR from programs : Reading STDERR from a Program
  • reporting filenames in : Making Perl Report Filenames in Errors
  • reporting like built-ins : Reporting Errors and Warnings Like Built-Ins
  • returning failure from subroutines : Returning Failure
  • trapping in require/use statements : Trapping Errors in require or use
  • trapping undefined function calls : Trapping Undefined Function Calls with AUTOLOAD
  • web server error log
  • • Introduction
    • Processing Server Logs
• escaping chacters : Escaping Characters
• eval( )
• • in substitution
  • • Expanding Variables in User Input
    • Introduction
    • Commenting Regular Expressions
  • with require/use statement : Trapping Errors in require or use
• events, Tk resize : Responding to Tk Resize Events
• exceptions
• • handling in subroutines : Handling Exceptions
  • trapping undefined function calls : Trapping Undefined Function Calls with AUTOLOAD
• exclusive locks : Locking a File
• exec( )
• • Introduction
  • Replacing the Current Program with a Different One
  • Executing Commands Without Shell Escapes
• exists( ) : Adding an Element to a Hash
• • multiple hash key values : Hashes with Multiple Values Per Key
• expanding tabs : Expanding and Compressing Tabs
• expanding variables in user input : Expanding Variables in User Input
• Expect module : Controlling Another Program with Expect
• Expect, controlling programs with : Controlling Another Program with Expect
• expn program (example) : Program: expn and vrfy
• @EXPORT array (use pragma) : Defining a Module's Interface
• @EXPORT_OK array (use pragma) : Defining a Module's Interface
• @EXPORT_TAGS array (use pragma) : Defining a Module's Interface
• Exporter module
• • Introduction
  • Defining a Module's Interface
• exporting to modules : Introduction
• expressions, interpolating within strings : Interpolating Functions and Expressions Within Strings
• extracting from arrays : (see arrays)
• extracting URLs from HTML : Extracting URLs