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Index: E

-e file test operator : Named Unary and File Test Operators
/e modifier : Pattern-Matching Operators
-e switch, perl : Switches
each function
- each
- Tying Hashes
editor support for debugger : Editor Support for Debugging
effective gid : (see $ variables, $) variable)
effective uid : (see $ variables, $)
$EFFECTIVE_GROUP_ID : (see $ variables, $) variable)
$EFFECTIVE_USER_ID : (see $ variables, $> variable)
efficiency : (see performance)
$EGID : (see $ variables, $) variable)
else statement : (see if statements)
elsif statement : (see if statements)
Emacs, debugger and : Editor Support for Debugging
enablecache() routine : Benchmark - Check and Compare Running Times of Code
encapsulation : Using Object Methods
encryption
- crypt
- Penguin
end of file : eof
END subrountine : Package Constructors and Destructors: BEGIN and END
__END__ token
- Other literal tokens
- Global Special Filehandles
endgrent function : getgrent
endhostent function : gethostent
ending : (see terminating)
endless loop : (see infinite loops)
endprotoent function : getprotoent
endpwent function : getpwent
endservent function : getservent
English module
- vars - Predeclare Global Variable Names
- Awk Traps
%ENV hash : Global Special Arrays
- deleting from : delete
Env module : Env - Import Environment Variables
environment variables : Global Special Arrays
- importing : Env - Import Environment Variables
- PERL5DB : Debugger Customization
- PERL_DESTRUCT_LEVEL : Note on Garbage Collection
- PWD : Cwd - Get Pathname of Current Working Directory
eof function
- eof
- Time Efficiency
eq operator : Universal Blunders
equal sign : (see = (equal sign))
equal to (=) operator : Equality Operators
equality operators : Equality Operators
erasing : (see deleting)
$ERRNO : (see $ variables, $! variable)
error messages
- Carp - Generate Error Messages
- User Efficiency
- Developing with Style
- Diagnostic Messages
errors : Diagnostic Messages
- $@ variable for : Global Special Variables
- $! variable for : Global Special Variables
- $? variable for : Global Special Variables
- handling permissions for processes : IPC::Open3 - Open a Process for Reading, Writing, and Error Handling
escape sequences for control characters : String literals
/etc/group file
- getgrent
- Time Efficiency
/etc/hosts file : gethostent
/etc/networks file : getnetent
/etc/passwd file
- getpwent
- Time Efficiency
/etc/services file : getservent
/etc/utmp file : getlogin
$EUID : (see $ variables, $> variable)
eval function
- eval
- References and Nested Data Structures
- Time Efficiency
- die function and : die
- loops and : Time Efficiency
- translating with variables : Pattern-Matching Operators
$EVAL_ERROR : (see $ variables, $@ variable)
examples, Perl : Examples
exceptions, die function for : die
exclamation point : (see ! (bang))
exclusive OR operator
- Bitwise Operators
- Logical and, or, not, and xor
- Awk Traps
exec function : exec
$EXECUTABLE_NAME : (see $ variables, $^X variable)
executing
- methods : Method Invocation
- other programs from Perl : system
- Perl program
- - How to Do It
  - Cooperating with Command Interpreters
execv function (in C) : exec
execvp function (in C) : exec
exists function
- exists
- Tying Hashes
EXISTS method : Tying Hashes
exit function
- exit
- fork
exit statement (awk) : p
exiting
- diagnostics module : diagnostics - Force Verbose Warning Diagnostics
- infinite loop : For loops
exp function : exp
expansion, filename : glob
exponentiation (**) operator
- Exponentiation
- Awk Traps
Exporter module : Exporter - Default Import Method for Modules
expr command (debugger) : Debugger Commands
extending arrays : List Values and Arrays
extensions, Perl
- installing : ExtUtils::Install - Install Files from Here to There
- Makefiles for : ExtUtils::MakeMaker - Create a Makefile for a Perl Extension
extracting substrings : substr
ExtUtils::Install module : ExtUtils::Install - Install Files from Here to There
ExtUtils::Liblist module : ExtUtils::Liblist - Determine Libraries to Use and How to Use Them
ExtUtils::MakeMaker module : ExtUtils::MakeMaker - Create a Makefile for a Perl Extension
ExtUtils::Manifest module : ExtUtils::Manifest - Utilities to Write and Check a MANIFEST File
ExtUtils::Miniperl module : ExtUtils::Miniperl - Write the C Code for perlmain.c
ExtUtils::Mkbootstrap module : ExtUtils::Mkbootstrap - Make a Bootstrap File for Use by DynaLoader
ExtUtils::Mksymlists module : ExtUtils::Mksymlists - Write Linker Option Files for Dynamic Extension
ExtUtils::MM_OS2 module : ExtUtils::MM_OS2 - Methods to Override UNIX Behavior in ExtUtils::MakeMaker
ExtUtils::MM_Unix module : ExtUtils::MM_Unix - Methods Used by ExtUtils::MakeMaker
ExtUtils::MM_VMS module : ExtUtils::MM_VMS - Methods to Override UNIX Behavior in ExtUtils::MakeMaker

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