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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" ></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: W</H1><DL><a name="-w"><dt>\w, <a name="matching-ideograph-with"> matching ideograph with: <a href="../ch15_02.htm#INDEX-2840">15.2. Effects of Character Semantics</a></dt><a name="-w-command-line-switch"><dt>-w command-line switch: <a href="../ch19_01.htm#INDEX-3459">19.1.3. Switches</a></dt><a name="-W-writeable-by-real-uid-gid-file-test"><dt>-W (writeable by real uid/gid) file test: <a href="../ch03_10.htm#INDEX-896">3.10. Named Unary and File Test Operators</a></dt><a name="w-forward-character=-w-forward-character"><dt>w forward character=\w (forward character): <a href="../ch01_07.htm#INDEX-358">1.7. Regular Expressions</a></dt><a name="-w-switch-Perl"><dt>-w switch, Perl: <a href="../ch28_02.htm#INDEX-4463">28.2. Special Variables in Alphabetical Order</a></dt><a name="wait-function"><dt>wait function: <a href="../ch29_02.htm#INDEX-5400">29.2.196. wait</a></dt><a name="wait-system-call"><dt>wait system call: <a href="../ch28_02.htm#INDEX-4423">28.2. Special Variables in Alphabetical Order</a></dt><a name="waitpid-function"><dt>waitpid function: <a href="../ch29_02.htm#INDEX-5403">29.2.197. waitpid</a></dt><a name="wantarray-function"><dt>wantarray function: <a href="../ch29_02.htm#INDEX-5405">29.2.198. wantarray</a></dt><a name="warn-function"><dt>warn function: <a href="../ch29_02.htm#INDEX-5408">29.2.199. warn</a></dt><a name="$WARNING"><dt>$WARNING: <a href="../ch28_02.htm#INDEX-4595">28.2. Special Variables in Alphabetical Order</a></dt><a name="warning-messages"><dt>warning messages: <a href="../ch19_01.htm#INDEX-3458">19.1.3. Switches</a></dt><dd><dl> <dt><a href="../ch29_02.htm#INDEX-5409">29.2.199. warn</a></dt> <dt><a href="../ch33_01.htm#INDEX-5824">33. Diagnostic Messages</a></dt> <a name="-intercepting"> <dt> intercepting: <a href="../ch28_02.htm#INDEX-4582">28.2. Special Variables in Alphabetical Order</a></dt> <a name="-w-switch-turning-on-with"> <dt>-w switch, turning on with: <a href="../ch01_03.htm#INDEX-168">1.3.1. How to Do It</a></dt></dl></dd><a name="${^WARNING_BITS}"><dt>${^WARNING_BITS}: <a href="../ch28_02.htm#INDEX-4599">28.2. Special Variables in Alphabetical Order</a></dt><a name="warnings"><dd><dl> <a name="-lexical;-${^WARNING_BITS}"> <dt> lexical; ${^WARNING_BITS}: <a href="../ch28_02.htm#INDEX-4597">28.2. Special Variables in Alphabetical Order</a></dt> <a name="about-undefined-values"> <dt>about undefined values: <a href="../ch04_01.htm#INDEX-1032">4. Statements and Declarations</a></dt> <a name="disabling-unconditionally-and-permanently"> <dt>disabling unconditionally and permanently: <a href="../ch19_01.htm#INDEX-3466">19.1.3. Switches</a></dt> <a name="modules-for"> <dt>modules for: <a href="../ch32_01.htm#INDEX-5669">32.1.15. Warnings and Exceptions</a></dt> <a name="about-remaining-references-to-tied-objects"> <dt>about remaining references to tied objects: <a href="../ch14_05.htm#INDEX-2765">14.5. A Subtle Untying Trap</a></dt> <a name="verbosity-forcing-in"> <dt>verbosity, forcing in: <a href="../ch32_01.htm#INDEX-5634">32.1.13. Perl Language Extensions and Internals</a></dt></dl></dd><a name="warnings-module"><dt>warnings module: <a href="../ch32_01.htm#INDEX-5672">32.1.15. Warnings and Exceptions</a></dt><a name="warnings-pragma"><dt>warnings pragma: <a href="../ch04_09.htm#INDEX-1242">4.9.1. Controlling Warnings</a></dt><a name="warnLevel-option-debugger"><dt>warnLevel option (debugger): <a href="../ch20_03.htm#INDEX-3604">20.3.3. Debugger Options</a></dt><a name="watch-expressions"><dt>watch expressions: <a href="../ch20_02.htm#INDEX-3540">20.2.3. Tracing</a></dt><dd><dl></dl></dd><a name="watch-points-placing-on-Perl-variables"><dt>watch points, placing on Perl variables: <a href="../ch14_06.htm#INDEX-2789">14.6. Tie Modules on CPAN</a></dt><a name="weak-references"><dt>weak references: <a href="../ch08_05.htm#INDEX-2062">8.5.2. Garbage Collection, Circular References, and Weak References</a></dt><a name="WeakRef-module"><dt>WeakRef module: <a href="../ch12_06.htm#INDEX-2511">12.6.1. Garbage Collection with DESTROY Methods</a></dt><a name="weather-Perl-modules-for"><dt>weather, Perl modules for: <a href="../ch22_01.htm#INDEX-3906">22.1. The CPAN modules Directory</a></dt><a name="web-Perl-modules-for"><dt>web, Perl modules for: <a href="../ch22_01.htm#INDEX-3869">22.1. The CPAN modules Directory</a><dd><dl><dt><a href="../ch32_01.htm#INDEX-5575">32.1.9. World Wide Web</a></dt></dl></dd> <a name="while-loops"><dt>while loops: <a href="../ch01_06.htm#INDEX-305">1.6.2.1. The while and until statements</a></dt><dd><dl> <dt><a href="../ch04_04.htm#INDEX-1074">4.4.1. while and until Statements</a></dt> <a name="angle-operator-and-$_"> <dt>angle operator and $_: <a href="../ch02_11.htm#INDEX-749">2.11.2. Line Input (Angle) Operator</a></dt><a name="eof-function-in"> <dt>eof function in: <a href="../ch29_02.htm#INDEX-4741">29.2.31. eof</a></dt></dl></dd><a name="while-modifier"><dt>while modifier: <a href="../ch04_01.htm#INDEX-1044">4.1. Simple Statements</a></dt><a name="while-statements"><dt>while statements: <a href="../ch01_05.htm#INDEX-252">1.5.5. Logical Operators</a></dt><dd><dl> <a name="Boolean-context-supplying"> <dt>Boolean context, supplying: <a href="../ch02_07.htm#INDEX-657">2.7.2. Boolean Context</a></dt> <a name="list-assignment-in"> <dt>list assignment in: <a href="../ch02_08.htm#INDEX-695">2.8.1. List Assignment</a></dt></dl></dd><a name="whitespace"><dt>whitespace: <a href="../ch01_07.htm#INDEX-354">1.7. Regular Expressions</a></dt><dd><dl> <dt><a href="../ch02_02.htm#INDEX-410">2.2. Molecules</a></dt> <dt><a href="../ch24_03.htm#INDEX-4252">24.3. Programming with Style</a></dt> <dt><a href="../ch29_01.htm#INDEX-4609">29. Functions</a></dt> <a name="cononicalizing-in-a-variable"> <dt>cononicalizing in a variable: <a href="../ch05_02.htm#INDEX-1429">5.2.3.1. Modifying strings en passant</a></dt> <a name="leading-removing-in-here-documents"> <dt>in formats: <a href="../ch07_01.htm#INDEX-1900">7. Formats</a></dt><dt>leading, removing in here documents: <a href="../ch02_06.htm#INDEX-620">2.6.6. "Here" Documents</a></dt> <a name="quote-characters-use-in"> <dt>quote characters, use in: <a href="../ch02_06.htm#INDEX-593">2.6.3. Pick Your Own Quotes</a></dt> <a name="-x-modifier-in-pattern-matching"> <dt>/x modifier in pattern matching: <a href="../ch05_02.htm#INDEX-1356">5.2.1. Pattern Modifiers</a></dt></dl></dd><a name="whitespaces"><dt>whitespaces, <a name="use-as-variable-name-or-delimiter-for-quote-construct-changes-in">use as variable name or delimiter for quote construct, changes in: <a href="../ch24_01.htm#INDEX-4172">24.1.5. Previous Perl Traps</a></dt><a name="wide-character-APIs-enabling-Perl-use-of-on-target-system"><dt>wide character APIs</dt> <dt><dd><dl>enabling Perl use of on target system: <a href="../ch19_01.htm#INDEX-3386">19.1.3. Switches</a></dt><dt>system calls using: <a href="../ch15_01.htm#INDEX-2816">15.1. Building Character</a></dt></dl></dd><a name="wide-syscalls"><dt>wide, syscalls: <a href="../ch28_02.htm#INDEX-4601">28.2. Special Variables in Alphabetical Order</a></dt><a name="${^WIDE_SYSTEM_CALLS}"><dt>${^WIDE_SYSTEM_CALLS}: <a href="../ch28_02.htm#INDEX-4603">28.2. Special Variables in Alphabetical Order</a></dt><a name="width"><dt>width</dt><dd><dl> <a name="character-representation"> <dt>character representation: <a href="../ch15_01.htm#INDEX-2807">15.1. Building Character</a></dt>⌨️ 快捷键说明
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