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<html><head><title>Index: W</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" ></a></p><map name="banner-map"><area alt="Learning Perl, 3rd. Ed." href="../index.htm" coords="1,-2,616,66" shape="rect"><area alt="Search this book" href="../jobjects/fsearch.htm" coords="629,-11,726,25" shape="rect"></map><!-- TOP INDEX LINKS --><p><a href="idx_0.htm">Symbols & Numbers</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 --><H2>Index: W</H2><DL><!-- ========================== --><a name="waitpid-function"><dt>waitpid function: <a href="../ch14_06.htm#INDEX-982">14.6. Getting Down and Dirty with Fork</a></dt><!-- ========================== --><a name="Wall-Heidi"><dt>Wall, Heidi: <a href="../ch06_02.htm#INDEX-434">6.2. Input from the Diamond Operator</a></dt><!-- ========================== --><a name="Wall-Larry"><dt>Wall, Larry: <a href="../ch00_04.htm#INDEX-3">0.4. History of This Book</a></dt><dd><dl> <dt><a href="../ch01_02.htm#INDEX-10">1.2. What Does "Perl" Stand For?</a></dt></dl></dd><!-- ========================== --><a name="wantarray-function"><dt>wantarray function: <a href="../ch04_04.htm#INDEX-328">4.4. Return Values</a></dt><!-- ========================== --><a name="warn-function"><dt>warn function: <a href="../ch11_03.htm#INDEX-774">11.3.1. Warning Messages with warn</a></dt><!-- ========================== --><a name="warnings"><dt>warnings: <a href="../ch02_04.htm#INDEX-170">2.4. Perl's Built-in Warnings</a></dt><dd><dl> <a name="bad-filehandles-and"> <dt>bad filehandles and: <a href="../ch11_02.htm#INDEX-754">11.2.2. Bad Filehandles</a></dt> <a name="warn-function-for"> <dt>warn function for: <a href="../ch11_03.htm#INDEX-775">11.3.1. Warning Messages with warn</a></dt> </dl></dd><!-- ========================== --><a name="warnings-pragma"><dt>warnings pragma: <a href="../appb_06.htm#INDEX-1189"> B.6.6. The warnings Pragma</a></dt><!-- ========================== --><a name="Web"><dt>Web</dt><dd><dl> <a name="CGI-programs-and"> <dt>CGI programs and: <a href="../appb_16.htm#INDEX-1264"> B.16. The Common Gateway Interface (CGI)</a></dt> <a name="running-programs-over"> <dt>running programs over: <a href="../ch01_04.htm#INDEX-98">1.4.3. But How Do I Compile Perl?</a></dt> <a name="socket-support-and"> <dt>socket-support and: <a href="../appb_13.htm#INDEX-1254"> B.13.2. Sockets</a></dt> </dl></dd><!-- ========================== --><a name="which_dbm-utility"><dt>which_dbm utility: <a href="../ch16_01.htm#INDEX-1032">16.1. DBM Files and DBM Hashes</a></dt><!-- ========================== --><a name="while-control-structure"><dt>while control structure: <a href="../ch02_10.htm#INDEX-247">2.10. The while Control Structure</a></dt><dd><dl> <a name="for-control-structure-and"> <dt>for control structure and: <a href="../ch10_07.htm#INDEX-674">10.7. The for Control Structure</a></dt> <a name="naked-block-control-structure-and"> <dt>naked block control structure and: <a href="../ch10_04.htm#INDEX-656">10.4. The Naked Block Control Structure</a></dt> <a name="shortcut-for"> <dt>shortcut for: <a href="../ch06_01.htm#INDEX-425">6.1. Input from Standard Input</a></dt> <a name="until-control-structure-for-reversing"> <dt>until control structure for reversing: <a href="../ch10_02.htm#INDEX-642">10.2. The until Control Structure</a></dt> <a name="using-each-function-with"> <dt>using each function with: <a href="../ch05_03.htm#INDEX-408">5.3.2. The each Function</a></dt> </dl></dd><!-- ========================== --><a name="while-modifier"><dt>while modifier: <a href="../ch10_03.htm#INDEX-649">10.3. Expression Modifiers</a></dt><dd><dl> <dt><a href="../ch10_03.htm#INDEX-651">10.3. Expression Modifiers</a></dt> <dt><a href="../ch15_03.htm#INDEX-1005">15.3.1. Using sprintf with "Money Numbers"</a></dt></dl></dd><!-- ========================== --><a name="whitespace"><dt>whitespace: <a href="../ch01_04.htm#INDEX-78">1.4.2. What's Inside That Program?</a></dt><dd><dl> <dt><a href="../ch03_03.htm#INDEX-273">3.3.1. The qw Shortcut</a></dt> <a name="global-replacements-and"> <dt>global replacements and: <a href="../ch09_06.htm#INDEX-613">9.6.1. Global Replacements with /g</a></dt> <a name="greater-than-sign-and"> <dt>greater-than sign and: <a href="../ch11_02.htm#INDEX-749">11.2. Opening a Filehandle</a></dt> <a name="in-format-strings"> <dt>in format strings: <a href="../ch16_02.htm#INDEX-1049">16.2. Manipulating Data with pack and unpack</a></dt> <a name="----s-shortcut-for"> <dt>\\\\s shortcut for: <a href="../ch08_01.htm#INDEX-534">8.1.1. Character Class Shortcuts</a></dt> <a name="split-operator-and"> <dt>split operator and: <a href="../ch09_07.htm#INDEX-629">9.7. The split Operator</a></dt> </dl></dd><!-- ========================== --><a name="who-command-Unix"><dt>who command (Unix): <a href="../ch14_04.htm#INDEX-968">14.4.1. Using Backquotes in a List Context</a></dt><!-- ========================== --><a name="Windows-Registry"><dt>Windows Registry: <a href="../appb_07.htm#INDEX-1194"> B.7.1. Direct System Database Access</a></dt><!-- ========================== --><a name="word-boundary-anchors"><dt>word-boundary anchors: <a href="../ch08_03.htm#INDEX-551">8.3.1. Word Anchors</a></dt><!-- ========================== --><a name="word-count-hashes-and"><dt>word count, hashes and: <a href="../ch05_01.htm#INDEX-379">5.1.1. Why Use a Hash?</a></dt><!-- ========================== --><a name="word-processor-using-instead-of-a-text-editor"><dt>word processor, using instead of a text editor: <a href="../ch01_04.htm#INDEX-66">1.4. How Do I Make a Perl Program?</a></dt><!-- ========================== --><a name="word-wrapping-Text-:-:Wrap-module-for"><dt>word-wrapping, Text::Wrap module for: <a href="../appb_05.htm#INDEX-1176"> B.5.11. The Text::Wrap Module</a></dt><!-- ========================== --><a name="words-----w-shortcut-for"><dt>words, \w shortcut for: <a href="../ch08_01.htm#INDEX-532">8.1.1. Character Class Shortcuts</a></dt><!-- ========================== --><a name="working-directory"><dt>working directory</dt><dd><dl> <a name="chdir-operator-for-changing"> <dt>chdir operator for changing: <a href="../ch12_01.htm#INDEX-849">12.1. Moving Around the Directory Tree</a></dt> <a name="current-cwd-function-for-determining"> <dt>current, cwd function for determining: <a href="../appb_05.htm#INDEX-1155"> B.5.2. The Cwd Module</a></dt> </dl></dd><!-- ========================== --><a name="wrap-function"><dt>wrap function: <a href="../appb_05.htm#INDEX-1175"> B.5.11. 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