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<H1><FONT COLOR="#FF0000"><B><FONT SIZE=10>Perl 5</FONT></B></FONT></H1>
<H1><FONT COLOR="#FF0000"><B> <FONT SIZE=10>U N L E A S H E D</FONT></B></FONT></H1>
<BR>
<BR>
<BR>
<H3><I>by Kamran Husain and Robert F. Breedlove</I></H3>
<BR>
<BR>
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<H2 ALIGN=CENTER><FONT COLOR="#FF0000"><FONT SIZE=+3>C O N T E N T S<A NAME="CONTENTS"></A>
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<H2><A HREF="#Introduction"><I>Introduction</I></A></H2>
<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter</FONT></I><FONT SIZE=5 COLOR=#FF0000>
1</FONT><FONT SIZE=5> <A HREF="ch1.htm" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm"><I>What is Perl?</I></A></FONT></H2>
<UL>
<LI><A HREF="ch1.htm#WhyPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#WhyPerl" >Why Perl?</A>
<LI><A HREF="ch1.htm#ABriefHistoryofPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#ABriefHistoryofPerl" >A Brief History of Perl</A>
<LI><A HREF="ch1.htm#TheBenefitsofUsingPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#TheBenefitsofUsingPerl" >The Benefits of Using Perl</A>
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<LI><A HREF="ch1.htm#CostandLicensing" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#CostandLicensing" >Cost and Licensing</A>
<LI><A HREF="ch1.htm#Availability" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#Availability" >Availability</A>
<LI><A HREF="ch1.htm#InterpretedLanguage1" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#InterpretedLanguage1" >Interpreted Language</A>
<LI><A HREF="ch1.htm#Practical" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#Practical" >Practical</A>
<LI><A HREF="ch1.htm#LanguageCapabilities" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#LanguageCapabilities" >Language Capabilities</A>
<LI><A HREF="ch1.htm#IntegrationwithC" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#IntegrationwithC" >Integration with C</A>
<LI><A HREF="ch1.htm#SpecializedExtensionstoPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#SpecializedExtensionstoPerl" >Specialized Extensions to Perl</A>
<LI><A HREF="ch1.htm#SocketCapability" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#SocketCapability" >Socket Capability</A>
<LI><A HREF="ch1.htm#PerlIsRelativelyEasytoLearn" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#PerlIsRelativelyEasytoLearn" >Perl Is Relatively Easy to Learn</A>
<LI><A HREF="ch1.htm#PerlHasBuiltInDebuggingFacilities" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#PerlHasBuiltInDebuggingFacilities" >Perl Has Built-In Debugging Facilities</A>
<LI><A HREF="ch1.htm#PerlHelpIsReadilyAvailable" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#PerlHelpIsReadilyAvailable" >Perl Help Is Readily Available</A>
<LI><A HREF="ch1.htm#PerlExamplesAreReadilyAvailable" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#PerlExamplesAreReadilyAvailable" >Perl Examples Are Readily Available</A>
</UL>
<LI><A HREF="ch1.htm#WhatAretheNegativesofUsingPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#WhatAretheNegativesofUsingPerl" >What Are the Negatives of Using Perl?</A>
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<LI><A HREF="ch1.htm#InterpretedLanguage" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#InterpretedLanguage" >Interpreted Language</A>
<LI><A HREF="ch1.htm#PerceivedasPublicDomain" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#PerceivedasPublicDomain" >Perceived as Public Domain</A>
<LI><A HREF="ch1.htm#InformalSupport" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#InformalSupport" >Informal Support</A>
<LI><A HREF="ch1.htm#ProtectingProprietaryCode" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#ProtectingProprietaryCode" >Protecting Proprietary Code</A>
<LI><A HREF="ch1.htm#ConcernsAboutReliability" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#ConcernsAboutReliability" >Concerns About Reliability</A>
<LI><A HREF="ch1.htm#MaintainabilityofScripts" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#MaintainabilityofScripts" >Maintainability of Scripts</A>
<LI><A HREF="ch1.htm#GNUCopyleftLicenseAgreement" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#GNUCopyleftLicenseAgreement" >GNU Copyleft License Agreement</A>
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<LI><A HREF="ch1.htm#WhatCanPerlDo" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#WhatCanPerlDo" >What Can Perl Do?</A>
<UL>
<LI><A HREF="ch1.htm#UNIXSystemMaintenance" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#UNIXSystemMaintenance" >UNIX System Maintenance</A>
<LI><A HREF="ch1.htm#CGIScripts" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#CGIScripts" >CGI Scripts</A>
<LI><A HREF="ch1.htm#MailProcessing" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#MailProcessing" >Mail Processing</A>
<LI><A HREF="ch1.htm#AutomatingWebSiteMaintenance" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#AutomatingWebSiteMaintenance" >Automating Web Site Maintenance</A>
<LI><A HREF="ch1.htm#AutomatingFileRetrieval" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#AutomatingFileRetrieval" >Automating File Retrieval</A>
</UL>
<LI><A HREF="ch1.htm#IsPerlforYou" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#IsPerlforYou" >Is Perl for You?</A>
<LI><A HREF="ch1.htm#Summary" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch1.htm#Summary" >Summary</A>
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<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter</FONT></I><FONT SIZE=5 COLOR=#FF0000>
2</FONT><FONT SIZE=5> <A HREF="ch2.htm" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm"><I>A Brief Introduction to Perl</I></A></FONT>
</H2>
<UL>
<LI><A HREF="ch2.htm#RunningPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#RunningPerl" >Running Perl</A>
<LI><A HREF="ch2.htm#VariablesinPerl" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#VariablesinPerl" >Variables in Perl</A>
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<LI><A HREF="ch2.htm#SpecialVariables" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#SpecialVariables" >Special Variables</A>
<LI><A HREF="ch2.htm#CodeBlocks" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#CodeBlocks" >Code Blocks</A>
<LI><A HREF="ch2.htm#QuotingRules" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#QuotingRules" >Quoting Rules</A>
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<LI><A HREF="ch2.htm#ArraysandAssociativeArrays" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#ArraysandAssociativeArrays" >Arrays and Associative Arrays</A>
<UL>
<LI><A HREF="ch2.htm#WhatAreAssociativeArrays" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#WhatAreAssociativeArrays" >What Are Associative Arrays?</A>
</UL>
<LI><A HREF="ch2.htm#ArrayOperations" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#ArrayOperations" >Array Operations</A>
<LI><A HREF="ch2.htm#FileHandlesandOperators" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#FileHandlesandOperators" >File Handles and Operators</A>
<LI><A HREF="ch2.htm#WorkingwithPatterns" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#WorkingwithPatterns" >Working with Patterns</A>
<LI><A HREF="ch2.htm#Subroutines" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#Subroutines" >Subroutines</A>
<LI><A HREF="ch2.htm#AFinalNote" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#AFinalNote" >A Final Note</A>
<LI><A HREF="ch2.htm#Summary" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch2.htm#Summary" >Summary</A>
</UL>
<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter</FONT></I><FONT SIZE=5 COLOR=#FF0000>
3</FONT><FONT SIZE=5> <A HREF="ch3.htm" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm"><I>References</I></A></FONT></H2>
<UL>
<LI><A HREF="ch3.htm#IntroductiontoReferences" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#IntroductiontoReferences" >Introduction to References</A>
<LI><A HREF="ch3.htm#UsingReferences" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#UsingReferences" >Using References</A>
<LI><A HREF="ch3.htm#TheBackslashOperator" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#TheBackslashOperator" >The Backslash Operator</A>
<LI><A HREF="ch3.htm#ReferencesandArrays" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#ReferencesandArrays" >References and Arrays</A>
<LI><A HREF="ch3.htm#UsingMultidimensionalArrays" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#UsingMultidimensionalArrays" >Using Multidimensional Arrays</A>
<LI><A HREF="ch3.htm#ReferencestoSubroutines" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#ReferencestoSubroutines" >References to Subroutines</A>
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<LI><A HREF="ch3.htm#UsingSubroutineTemplates" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#UsingSubroutineTemplates" >Using Subroutine Templates</A>
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<LI><A HREF="ch3.htm#ImplementingStateMachines" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#ImplementingStateMachines" >Implementing State Machines</A>
<LI><A HREF="ch3.htm#PassingMoreThanOneArrayintoaSubro" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#PassingMoreThanOneArrayintoaSubro" >Passing More Than One Array into a Subroutine</A>
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<LI><A HREF="ch3.htm#PassbyValueorbyReference" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#PassbyValueorbyReference" >Pass by Value or by Reference?</A>
</UL>
<LI><A HREF="ch3.htm#ReferencestoFileHandles" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#ReferencestoFileHandles" >References to File Handles</A>
<UL>
<LI><A HREF="ch3.htm#WhatDoesthevariableOperatorDo" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#WhatDoesthevariableOperatorDo" >What Does the <I>*variable</I> Operator Do?</A>
</UL>
<LI><A HREF="ch3.htm#UsingSymbolicReferences" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#UsingSymbolicReferences" >Using Symbolic References</A>
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<LI><A HREF="ch3.htm#DeclaringwithCurlyBraces" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#DeclaringwithCurlyBraces" >Declaring with Curly Braces</A>
<LI><A HREF="ch3.htm#MultidimensionalAssociativeArrays" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#MultidimensionalAssociativeArrays" >Multidimensional Associative Arrays</A>
</UL>
<LI><A HREF="ch3.htm#StrictReferences" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#StrictReferences" >Strict References</A>
<LI><A HREF="ch3.htm#ForMoreInformation" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#ForMoreInformation" >For More Information</A>
<LI><A HREF="ch3.htm#Summary" tppabs="http://www.mcp.com/815097600/0-672/0-672-30891-6/ch3.htm#Summary" >Summary</A>
</UL>
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