Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

E

E (constant) Math Object Math.E
-e file test operator : Named Unary and File Test Operators
E for exponential notation : Floating-Point Literals
/e modifier : Pattern-Matching Operators
-e operator : Graphic Counter
-e switch, perl : Switches
each function each Tying Hashes
echo command Introduction Environment Variables
echo directive (SSI) : echo
editor support for debugger : Editor Support for Debugging
effective gid (see $) variable)
effective uid (see $< variable)
efficiency (see performance)
$EGID (see $) variable)
electronic mail (see mail) Security Holes and Security Hobbles mailto URL for The mailto URL Using mailto to collect form data (...
Element object Element Element.blur() Element.checked Element.click() Element.defaultChecked Element.defaultValue Element.focus() Element.form Element.length Element.name Element.onblur() Element.onchange() Element.onclick() Element.onfocus() Element.options[] Element.select() Element.selectedIndex Element.type Element.value Element Object
elements, array (see arrays, elements of)
elements, form : Form Elements
elements[ ] property Properties The Form Object Form Elements Form.elements[]
else/elsif clauses : if (see also if statements)
<em> tags <em> The <em> Tag
Emacs, debugger and : Editor Support for Debugging
email (see mail)
embed property : Document.plugins
<embed> tags <embed> Alternative Audio Support The <embed> tag The units attribute The JavaObject Object Working with Plug-Ins Document.embeds[]
embedded guides : Embedded Guides
embedded images (see images and graphics)
embedded objects Embedded Versus Referenced Content Embedding Other Document Types Embedded Content The type attribute <object> tags : (see <object> tags)
embeds[ ] property The JavaObject Object Working with Plug-Ins Document.embeds[] Properties
emphasis, tags for : (see <b> tags; <blink> tags; <dfn> tags; <em> tags; <i> tags; <strong> tags)
empty arrays : Creating Arrays objects : Creating New Objects with Constructors statements : The Empty Statement string literals Conversions to Numbers Conversions to booleans
EMWACS server : Other Languages Under Microsoft Windows
enablecache( ) : Benchmark--Check and Compare Runnin...
enabledPlugin property The MimeType Object MimeType.enabledPlugin Properties
Encapsulated PostScript (EPS) : Digital Clock
encapsulation : Using Object Methods
encoded data Encoded Data
encoding Sending Data to the Server Form.encoding application/x-www-form-urlencoded : The application/x-www-form-urlencod... characters (see special characters) file-selection fields and : File selection fields Latin-1 Escape Sequences in String Literals String Operators multipart/form-data : The multipart/form-data encoding multipart/mixed : The Multipart/Mixed-Media Type multipart/x-mixed-replace : Multipart Mixed-Replace-Media Type text/css : Document-Level Style Sheets text/plain : The text/plain encoding URLs URL Encoding The <form> Tag
encoding property Form.encoding Properties
encryption crypt Penguin
enctype attribute <form> Multipart Forms The FORM Tag Attributes <input> file-selection fields and : File selection fields (see also forms, input elements)
end of file : eof
END subrountine : Package Constructors and Destructor...
end tags, HTML : HTML Tag Syntax
__END__ token Other literal tokens Global Special Filehandles
EndComments statement : Digital Clock
endgrent function : getgrent
endhostent function : gethostent
ending (see terminating)
ending tags Start and End Tags Starting and Ending Tags Tags Without Ends
endless loop (see infinite loops)
endprotoent function : getprotoent
endpwent function : getpwent
endservent function : getservent
endtime attribute : LiveAudio
end_time( ) : LiveAudio
English module vars--Predeclare Global Variable Names Awk Traps
entities Character Entities Special text characters Character Entities Special Character Encoding Handling reserved and unsafe characters Character Entities JavaScript JavaScript Entities JavaScript Entities JavaScript Entity Execution
entity headers, HTTP : Entity Headers
%ENV hash Global Special Arrays deleting from : delete
Env module : Env--Import Environment Variables
environment variables Internal Workings of CGI Using Environment Variables Where Did You Come From? Environment Variables Global Special Arrays accessing How can I access my environment var... Programming in CGI browser : Still More Features CGI : CGI Environment Variables importing : Env--Import Environment Variables Perl : Environment Variables PERL5DB : Debugger Customization PERL_DESTRUCT_LEVEL : A Note on Garbage Collection PWD : Cwd--Get Pathname of Current Workin... setting : Server Simulation SSI and : SSI Environment Variables using dynamically (see SSI)
eof function eof Time Efficiency
EOL character : Multipart Forms
EPS (Encapsulated PostScript) : Digital Clock
eq operator : Universal Blunders
equal sign (=) assignment operator Assignment Operators Assignment Operators Assignment Operators The assign() Method Previous Perl Traps combined with operations : Assignment with Operation copy constructor : Copy constructor debugger command : Debugger Commands defining tag attributes : The Syntax of a Tag == (equal to) operator Equality Operators Universal Blunders Equality (==) => (corresponds to) operator Comma Operators with key/value pairs : Hashes (Associative Arrays) with named parameters : Hashes (Associative Arrays) =~ (binding) operator : Binding Operators
equality operators : Equality Operators
erasing (see deleting)
$ERRNO (see $! variable)
error messages Carp--Generate Error Messages User Efficiency Programming with Style Diagnostic Messages customizing : Tailoring SSI Output
errors Diagnostic Messages event handlers for : (see onerror( ); onError attribute) failing gracefully Fail Gracefully Failing Gracefully the Hard Way handling permissions for processes : IPC::Open3--Open a Process for Read... server, HTTP codes for : Server Errors $@ variable for : Global Special Variables $! variable for : Global Special Variables $? variable for : Global Special Variables (see also debugging CGI programs)
escape sequences Escape Sequences in String Literals escape() unescape() control characters : String literals
escape( ) escape( ) Function unescape( ) Function Reading Cookies escape()
escapes (see character entities; encoding URLs)
ETag header : ETag
/etc directory /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 $>)
eval command : Is it true that /$user_variable/ is...
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( ) eval( ) Function Methods eval() Core Language Changes Miscellaneous Differences Converting Strings to Numbers The JSObject Class Data Conversion eval() for JSObject object : JSObject.eval() for Object object : Object.eval()
evaluating expressions : Expressions
$EVAL_ERROR (see $@ variable)
event attribute Event Handlers in <SCRIPT> Tags Scripts
events Interact with the User Functions Event Handlers and button/checkbox order : Backward radio and checkbox arrays case sensitivity : Case Sensitivity execution order of : Event Handlers images and : Image Event Handlers JavaScript Executable Content: JavaScript in a... JavaScript and Events JavaScript Overview Client-Side JavaScript Examples JavaScript Event Handlers <a> tag and : The onClick, onMouseOver, and OnMou... <area> tag and : The onMouseOver and OnMouseOut attr... <form> tag and : The onsubmit and onreset attributes frames and : Frames and JavaScript <img> tag and : The name, onAbort, onError, and onL... <input> tag and : Form <input> Event H... <select> tag with : Form <select> event ... <textarea> tags and : Form <textarea> Even... javascript: protocol specifier : JavaScript in URLs keystrokes and : Dynamic HTML onAbort( ) : (see onAbort( )) onBlur( ) : (see onBlur( )) onChange( ) : (see onChange( )) onClick( ) : (see onClick( )) onError( ) : (see onError( )) onFocus( ) : (see onFocus( )) onLoad( ) : (see onLoad( )) onMouseOut( ) : (see onMouseOut( )) onMouseOver( ) : (see onMouseOver( )) onReset( ) : (see onReset( )) onSubmit( ) : (see onSubmit( )) onUnload( ) : (see onUnload( )) in regenerated documents : Event handlers in regenerated documents scope of : Scope of event handlers
examples Examples and Links for Further Expl... Examples
exceptions, die function for : die
exclamation point (see !)
exclusive OR operator Bitwise Xor (^) Bitwise Operators Logical and, or, not, and xor Awk Traps
exec directive (SSI) Introduction exec exec cgi directive Executing CGI Programs Counting Days Until . . . exec cmd directive : Executing External Programs
Exec feature (SSI) : Configuring the Apache and NCSA Ser...
exec function : exec
ExecCGI option : Configuration
executable applications Applets The type and valuetype attributes
$EXECUTABLE_NAME (see $^X variable)
executing external programs : Configuration 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
existence, testing for : Event Handlers
exists function exists Tying Hashes
exit function exit fork
exit statement (awk) : a2p
exiting diagnostics module : diagnostics--Force Verbose Warning ... infinite loops : For loops loops with break : break
exp( ) Math Object Math.exp() exp
expansion, filename : glob
expiration (see lifetime)
expires attribute (cookies) : The Set-Cookie Response Header
Expires header CGI and Response Headers The "Expires" and "Pragma" Headers Expires
expiring cookies : Cookie Server
Explorer (see Internet Explorer)
exponents Floating-Point Literals Math Object
exponentiation (**) operator

Exponentiation
Awk Traps
Exporter module : Exporter--Default Import Method for...
exporting data (see data-tainting security model)
expr command (debugger) : Debugger Commands
expressions Expression Statements Expressions
extending arrays : List Values and Arrays
extensions HTML HTML Standards and Extensions Nonstandard Extensions Beyond Extensions: Exploiting Bugs Perl installing : ExtUtils::Install--Install Files fr... Makefiles for : ExtUtils::MakeMaker--Create a Makef...
external programs, executing Configuration Executing External Programs
external style sheets External Style Sheets Limitations of Current Browsers The pros and cons of external styles External, document-level, and inline JSS
Extra Headers section, CGI data file : The Extra Headers Section
extra path information Extra Path Information Extra Path Information Hidden Fields
extracting substrings : substr
ExtUtils::Install module : ExtUtils::Install--Install Files fr...
ExtUtils::Liblist module : ExtUtils::Liblist--Determine Librar...
ExtUtils::MakeMaker module : ExtUtils::MakeMaker--Create a Makef...
ExtUtils::Manifest module : ExtUtils::Manifest--Utilities to Wr...
ExtUtils::Miniperl module : ExtUtils::Miniperl--Write the C Cod...
ExtUtils::Mkbootstrap module : ExtUtils::Mkbootstrap--Make a Boots...
ExtUtils::Mksymlists module : ExtUtils::Mksymlists--Write Linker ...
ExtUtils::MM_OS2 module : ExtUtils::MM_OS2--Methods to Overri...
ExtUtils::MM_Unix module : ExtUtils::MM_Unix--Methods Used by ...
ExtUtils::MM_VMS module : ExtUtils::MM_VMS--Methods to Overri... Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z