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<html><head><title>Index: E</title></head><body bgcolor="#FFFFFF" text="#000000"><!-- START OF BODY --><!-- TOP BANNER --><p><img src="../gifs/smbanns.gif" usemap="#banner-map" border=0 alt="Book Home" ></p><map name="banner-map"><AREA SHAPE="RECT" COORDS="0,0,466,71" HREF="../index.htm" ALT="Programming Perl"><AREA SHAPE="RECT" COORDS="467,0,514,18" HREF="../jobjects/fsearch.htm" ALT="Search this book"></map><!-- TOP INDEX LINKS --><p><a href="idx_0.htm">Symbols</a>| <a href="idx_a.htm">A</a>| <a href="idx_b.htm">B</a>| <a href="idx_c.htm">C</a>| <a href="idx_d.htm">D</a>| <a href="idx_e.htm">E</a>| <a href="idx_f.htm">F</a>| <a href="idx_g.htm">G</a>| <a href="idx_h.htm">H</a>| <a href="idx_i.htm">I</a>| <a href="idx_j.htm">J</a>| <a href="idx_k.htm">K</a>| <a href="idx_l.htm">L</a>| <a href="idx_m.htm">M</a>| <a href="idx_n.htm">N</a>| <a href="idx_o.htm">O</a>| <a href="idx_p.htm">P</a>| <a href="idx_q.htm">Q</a>| <a href="idx_r.htm">R</a>| <a href="idx_s.htm">S</a>| <a href="idx_t.htm">T</a>| <a href="idx_u.htm">U</a>| <a href="idx_v.htm">V</a>| <a href="idx_w.htm">W</a>| <a href="idx_x.htm">X</a>| <a href="idx_y.htm">Y</a>| <a href="idx_z.htm">Z</a></FONT><!-- INDEX SECTION BODY --><H1>Index: E</H1><DL><a name="@EXPORT-array"><dt>@EXPORT array: <a href="../ch28_02.htm#INDEX-4455">28.2. Special Variables in Alphabetical Order</a></dt><a name="@EXPORT_OK-array"><dt>@EXPORT_OK array: <a href="../ch28_02.htm#INDEX-4456">28.2. Special Variables in Alphabetical Order</a></dt><a name="%EXPORT_TAGS-hash"><dt>%EXPORT_TAGS hash: <a href="../ch28_02.htm#INDEX-4457">28.2. Special Variables in Alphabetical Order</a></dt><a name="-e-execute-command-line-switch"><dt>-e (execute) command-line switch: <a href="../ch19_01.htm#INDEX-3398">19.1.3. Switches</a></dt><a name="-e-exists-file-test"><dt>-e (exists) file test: <a href="../ch01_05.htm#INDEX-270">1.5.7. Some File Test Operators</a></dt><dd><dl> <dt><a href="../ch03_10.htm#INDEX-899">3.10. Named Unary and File Test Operators</a></dt></dl></dd><a name="-e-pattern-modifier"><dt>/e pattern modifier: <a href="../ch05_02.htm#INDEX-1416">5.2.3. The s/// Operator (Substitution)</a></dt><a name="each-function"><dt>each function: <a href="../ch09_04.htm#INDEX-2151">9.4.3. Access and Printing of a Hash of Hashes</a></dt><dd><dl> <dt><a href="../ch14_03.htm#INDEX-">14.3.1. Hash-Tying Methods</a></dt> <dt><a href="../ch29_02.htm#INDEX-4737">29.2.30. each</a></dt></dl></dd><a name="editors-support-for-debugging"><dt>editors, support for debugging: <a href="../ch20_03.htm#INDEX-3585">20.3.1. Editor Support for Debugging</a></dt><a name="effective-GID-group-ID"><dt>effective GID (group ID): <a href="../ch28_02.htm#INDEX-4434">28.2. Special Variables in Alphabetical Order</a></dt><a name="effective-UID-$EFFECTIVE_USER_ID"><dt>effective UID ($EFFECTIVE_USER_ID): <a href="../ch28_02.htm#INDEX-4441">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl> <dt>(see also <a href="idx_$.htm#$<-and-$>-variables">$< and $> variables</a>)</dt></dl></dd><a name="$EFFECTIVE_GROUP_ID"><dt>$EFFECTIVE_GROUP_ID: <a href="../ch28_02.htm#INDEX-4437">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl> <dt><a href="../ch28_02.htm#INDEX-4577">28.2. Special Variables in Alphabetical Order</a></dt></dl></dd><a name="$EFFECTIVE_USER_ID"><dt>$EFFECTIVE_USER_ID: <a href="../ch28_02.htm#INDEX-4439">28.2. Special Variables in Alphabetical Order</a></dt><a name="efficiency"><dt>efficiency (see <a href="idx_p.htm#performance">performance</a>)</dt><dd><dl> <a name="profiling"> <dt>profiling: <a href="../ch20_06.htm#INDEX-3654">20.6. The Perl Profiler</a></dt></dl></dd><a name="elements-in-arrays"><dt>elements in arrays:<a href="../ch01_02.htm#INDEX-84">1.2.1.2.1. Arrays.</a></dt><a name="else-if-statements"><dt>else-if statements: <a href="../ch01_06.htm#INDEX-301">1.6.1.1. The if and unless statements</a></dt><a name="ellipses-..."><dt>ellipses (...): <a href="../ch05_03.htm#INDEX-1473">5.3.1. Metasymbol Tables</a></dt><a name="else-statements"><dt>else statements: <a href="../ch01_06.htm#INDEX-300">1.6.1.1. The if and unless statements</a></dt><a name="emacs"><dt>emacs</dt><dd><dl> <a name="editor-support-for-debugger"> <dt>editor support for debugger: <a href="../ch20_03.htm#INDEX-3589">20.3.1. Editor Support for Debugging</a></dt> <a name="regular-expressions-use-of"> <dt>regular expressions, use of: <a href="../ch01_07.htm#INDEX-335">1.7. Regular Expressions</a></dt><a name="-*--sequences"> <dt>-*- sequences: <a href="../ch19_01.htm#INDEX-3341">19.1. Command Processing</a></dt></dl></dd> <a name="email"><dt>email: <a href="../ch22_01.htm#INDEX-3885">22.1. The CPAN modules Directory</a></dt><dd><dl> <dt>(see also <a href="idx_m.htm#mail">mail</a>)</dt></dl></dd><a name="embedding-Perl"><dt>embedding Perl: <a href="../ch21_04.htm#INDEX-3743">21.4. Embedding Perl (Using Perl from C)</a></dt><dd><dl> <dt><a href="../ch32_01.htm#INDEX-5712">32.1.17. Module Installation Support</a></dt> <a name="adding-Perl-interpreter-to-C-program"> <dt>adding Perl interpreter to C program: <a href="../ch21_04.htm#INDEX-3762">21.4.2. Adding a Perl Interpreter to Your C Program</a></dt> <a name="compiling-embedded-programs"> <dt>compiling embedded programs: <a href="../ch21_04.htm#INDEX-3755">21.4.1. Compiling Embedded Programs</a></dt> <a name="evaluating-Perl-statement-from-C"> <dt>evaluating Perl statement from C: <a href="../ch21_04.htm#INDEX-3771">21.4.4. Evaluating a Perl Statement from C</a></dt> <a name="perl-interpreter-program"> <dt>perl interpreter program: <a href="../ch21_01.htm#INDEX-3668">21. Internals and Externals</a></dt> <a name="Perl-stack-manipulating-from-C"> <dt>Perl stack, manipulating from C: <a href="../ch21_04.htm#INDEX-3778">21.4.5. Fiddling with the Perl Stack from C</a></dt></dl></dd><a name="empty-angle-operator-<>"><dt>empty angle operator (<>): <a href="../ch01_04.htm#INDEX-184">1.4. Filehandles</a></dt><a name="empty-subclass-test"><dt>empty subclass test: <a href="../ch12_05.htm#INDEX-2439">12.5. Class Inheritance</a></dt><dd><dl></dl></dd><a name="encapsulation"><dt>encapsulation: <a href="../ch01_02.htm#INDEX-117">1.2.1.3. Complexities</a></dt><dd><dl> <dt><a href="../ch08_03.htm#INDEX-2017">8.3.4. Using Object Methods</a></dt> <dt><a href="../ch12_01.htm#INDEX-2353">12.1. Brief Refresher on Object-Oriented Lingo</a></dt> <a name="namespace-based"> <dt>namespace-based: <a href="../ch14_06.htm#INDEX-2780">14.6. Tie Modules on CPAN</a></dt> <a name="objects-in-closures"> <dt>objects in closures: <a href="../ch12_07.htm#INDEX-2560">12.7.5. Using Closures for Private Objects</a></dt></dl></dd><a name="encryption"><dt>encryption: <a href="../ch29_02.htm#INDEX-4707">29.2.20. crypt</a></dt><dd><dl> <a name="modules-for"> <dt>modules for: <a href="../ch32_01.htm#INDEX-5609">32.1.12. Authentication, Security, and Encryption</a></dt> <a name="Perl-modules-for"> <dt>Perl modules for: <a href="../ch22_01.htm#INDEX-3865">22.1. The CPAN modules Directory</a></dt></dl></dd><a name="END-blocks"><dt>END blocks: <a href="../ch18_01.htm#INDEX-3230">18.1. The Life Cycle of a Perl Program</a></dt><dd><dl> <a name="exit-value-of-program-modifying"> <dt>exit value of program, modifying: <a href="../ch18_07.htm#INDEX-3313">18.7. Avant-Garde Compiler, Retro Interpreter</a></dt><a name="order-of-running"> <dt>order of running: <a href="../ch18_07.htm#INDEX-3310">18.7. Avant-Garde Compiler, Retro Interpreter</a></dt> <a name="skipping"> <dt>skipping: <a href="../ch18_07.htm#INDEX-3312">18.7. Avant-Garde Compiler, Retro Interpreter</a></dt></dl></dd><a name="end-of-string-matching"><dt>end of string, matching: <a href="../ch05_06.htm#INDEX-1619">5.6.2. Endings: The \z, \Z, and $ Assertions</a></dt><a name="__END__-token"><dt>__END__ token: <a href="../ch02_06.htm#INDEX-633">2.6.8. Other Literal Tokens</a></dt><dd><dl> <a name="__END__;-use-of"><dt><a href="../ch24_05.htm#INDEX-4294">24.5.2. Generating Perl in Other Languages</a></dt> <dt><a href="../ch28_02.htm#INDEX-4429">28.2. Special Variables in Alphabetical Order</a></dt></dl></dd><a name="endgrent-function"><dt>endgrent function: <a href="../ch29_02.htm#INDEX-4808">29.2.44. getgrent</a></dt><a name="endhostent-function"><dt>endhostent function: <a href="../ch29_02.htm#INDEX-4837">29.2.49. gethostent</a></dt><a name="ending"><dt>ending (see <a href="idx_t.htm#terminating">terminating</a>)</dt><a name="ending-escape-sequences-for-character-modification"><dt>ending escape sequences for character modification: <a href="../ch02_06.htm#INDEX-575">2.6.2. String Literals</a></dt><a name="endless-loop"><dt>endless loop (see <a href="idx_i.htm#infinite-loops">infinite loops</a>)</dt><a name="endprotoent-function"><dt>endprotoent function: <a href="../ch29_02.htm#INDEX-4880">29.2.60. getprotoent</a></dt><a name="endpwent-function"><dt>endpwent function: <a href="../ch29_02.htm#INDEX-4884">29.2.61. getpwent</a></dt><a name="endservent-function"><dt>endservent function: <a href="../ch29_02.htm#INDEX-4905">29.2.66. getservent</a></dt><a name="English-module"><dt>English module: <a href="../ch07_01.htm#INDEX-1921">7.1. Format Variables</a></dt><dd><dl> <dt><a href="../ch32_01.htm#INDEX-5637">32.1.13. Perl Language Extensions and Internals</a></dt></dl></dd><a name="enqueue-method"><dt>enqueue method: <a href="../ch17_02.htm#INDEX-3206">17.2.3.1. Queues</a></dt><a name="%ENV-hash"><dt>%ENV hash: <a href="../ch28_02.htm#INDEX-4443">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl> <a name="deleting-from"> <dt>deleting from: <a href="../ch29_02.htm#INDEX-4724">29.2.24. delete</a></dt> <a name="portability-of"> <dt>portability of: <a href="../ch25_04.htm#INDEX-4342">25.4. System Interaction</a></dt></dl></dd><a name="Env-module"><dt>Env module: <a href="../ch32_01.htm#INDEX-5639">32.1.13. Perl Language Extensions and Internals</a></dt>⌨️ 快捷键说明
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