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<html><head><title>Index: H</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: H</H2><DL><!-- ========================== --><a name="hard-links"><dt>hard links: <a href="../ch13_03.htm#INDEX-900">13.3. Links and Files</a></dt><dd><dl> <dt><a href="../ch13_03.htm#INDEX-901">13.3. Links and Files</a></dt></dl></dd><!-- ========================== --><a name="hash-elements-accessing"><dt>hash elements, accessing: <a href="../ch05_02.htm#INDEX-382">5.2. Hash Element Access</a></dt><!-- ========================== --><a name="hash-functions"><dt>hash functions: <a href="../ch05_03.htm#INDEX-404">5.3. Hash Functions</a></dt><!-- ========================== --><a name="hash-keys"><dt>hash keys: <a href="../ch05_01.htm#INDEX-373">5.1. What Is a Hash?</a></dt><dd><dl> <a name="delete-function-for-removing"> <dt>delete function for removing: <a href="../ch05_04.htm#INDEX-414">5.4.2. The delete Function</a></dt> <a name="exists-function-for-checking"> <dt>exists function for checking: <a href="../ch05_04.htm#INDEX-412">5.4.1. The exists Function</a></dt> <a name="omitting-quotes-from"> <dt>omitting quotes from: <a href="../ch17_04.htm#INDEX-1098">17.4. Unquoted Hash Keys</a></dt> <a name="sorting"> <dt>sorting: <a href="../ch15_04.htm#INDEX-1022">15.4.1. Sorting a Hash by Value</a></dt> </dl></dd><!-- ========================== --><a name="hashes"><dt>hashes: <a href="../ch05_01.htm#INDEX-371">5. Hashes</a></dt><dd><dl> <a name="accessing-elements-of"> <dt>accessing elements of: <a href="../ch05_02.htm#INDEX-381">5.2. Hash Element Access</a></dt> <a name="assigning"> <dt>assigning: <a href="../ch05_02.htm#INDEX-393">5.2.2. Hash Assignment</a></dt> <a name="autoincrements-autodecrements-and"> <dt>autoincrements/autodecrements and: <a href="../ch10_06.htm#INDEX-670">10.6.1. The Value of Autoincrement</a></dt> <a name="elements-of-interpolating-into-double-quoted-string-literals"> <dt>elements of, interpolating into double-quoted string literals: <a href="../ch05_04.htm#INDEX-415">5.4.3. Hash Element Interpolation</a></dt> <a name="functions-for"> <dt>functions for: <a href="../ch05_03.htm#INDEX-403">5.3. Hash Functions</a></dt> <a name="names-of"> <dt>names of: <a href="../ch05_02.htm#INDEX-385">5.2. Hash Element Access</a></dt> <a name="reasons-for-using"> <dt>reasons for using: <a href="../ch05_01.htm#INDEX-376">5.1.1. Why Use a Hash?</a></dt> <a name="slices-and"> <dt>slices and: <a href="../ch17_06.htm#INDEX-1117">17.6.2. Hash Slice</a></dt> <a name="unwinding"> <dt>unwinding: <a href="../ch05_02.htm#INDEX-391">5.2.1. The Hash as a Whole</a></dt> </dl></dd><!-- ========================== --><a name="here-documents"><dt>here documents: <a href="../appb_08.htm#INDEX-1209"> B.8.2. Here documents</a></dt><!-- ========================== --><a name="hexadecimal-literals"><dt>hexadecimal literals: <a href="../ch02_02.htm#INDEX-127">2.2.4. Nondecimal Integer Literals</a></dt><!-- ========================== --><a name="high-level-programming-languages"><dt>high-level programming languages: <a href="../ch01_02.htm#INDEX-16">1.2.1. Why Didn't Larry Just Use Some Other Language?</a></dt><dd><dl> <dt><a href="../ch01_02.htm#INDEX-25">1.2.2. Is Perl Easy or Hard?</a></dt></dl></dd><!-- ========================== --><a name="high-precision-numbers"><dt>high-precision numbers: <a href="../appb_09.htm#INDEX-1228"> B.9.3. Large and High-Precision Numbers</a></dt><!-- ========================== --><a name="home-directory"><dt>home directory: <a href="../ch12_01.htm#INDEX-851">12.1. Moving Around the Directory Tree</a></dt><!-- ========================== --><a name="hostname-function"><dt>hostname function: <a href="../appb_05.htm#INDEX-1172"> B.5.10. The Sys::Hostname Module</a></dt><!-- ========================== --><a name="hyphen--"><dt>hyphen (-)</dt><dd><dl> <a name="indicating-standard-input-stream"> <dt>indicating standard input stream: <a href="../ch06_02.htm#INDEX-438">6.2. Input from the Diamond Operator</a></dt> <a name="specifying-range-of-characters"> <dt>specifying range of characters: <a href="../ch08_01.htm#INDEX-527">8.1. Character Classes</a></dt> </dl></dd></dl><!-- BOTTOM INDEX LINKS --><p><hr width="684" align="LEFT"><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><!-- LIBRARY NAV BAR --><hr width="684" align="left"><img src="../../gifs/smnavbar.gif" usemap="#library-map" border="0" alt="Library Navigation Links"><p><font size="-1"><a href="../copyrght.htm">Copyright © 2002</a>O'Reilly & Associates, Inc.All Rights Reserved.</font></p><map name="library-map"><area shape="rect" coords="1,0,85,94" href="../../index.htm"><area shape="rect" coords="86,1,178,103" href="../../lwp/index.htm"><area shape="rect" coords="180,0,265,103" href="../../lperl/index.htm"><area shape="rect" coords="267,0,353,105" href="../../perlnut/index.htm"><area shape="rect" coords="354,1,446,115" href="../../prog/index.htm"><area shape="rect" coords="448,0,526,132" href="../../tk/index.htm"><area shape="rect" coords="528,1,615,119" href="../../cookbook/index.htm"><area shape="rect" coords="617,0,690,135" href="../../pxml/index.htm"></map><!-- END OF BODY --></body></html>⌨️ 快捷键说明
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