index-1.htm

prrl 5 programs codes in the book

<LI><A HREF="ch13.htm#ExampleUsingtheTTFONTSIZEFACECourierevalFONTTTFONTSIZEFuNCtionFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch13.htm#ExampleUsingtheTTFONTSIZEFACECourierevalFONTTTFONTSIZEFuNCtionFONT">

Example: Using the <TT>eval()</TT>

FuNCtion</FONT></A>

</UL>

<LI><A HREF="ch13.htm#WhatIsaSignal" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch13.htm#WhatIsaSignal">

What Is a Signal?</A>

<UL>

<LI><A HREF="ch13.htm#ExampleHowtoHandleaSignal" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch13.htm#ExampleHowtoHandleaSignal">

Example: How to Handle a Signal</A>

</UL>

<LI><A HREF="ch13.htm#Summary" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch13.htm#Summary">

Summary</A>

<LI><A HREF="ch13.htm#ReviewQuestions" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch13.htm#ReviewQuestions">

Review Questions</A>

<LI><A HREF="ch13.htm#ReviewExercises" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch13.htm#ReviewExercises">

Review Exercises</A>

</UL>



<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter </FONT></I><FONT SIZE=5 COLOR=#FF0000>14

</FONT><FONT SIZE=5>&nbsp;&nbsp;What Are Objects?</FONT></H2>

<UL>

<LI><A HREF="ch14.htm#LearningaboutClasses" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#LearningaboutClasses">

Learning about Classes</A>

<LI><A HREF="ch14.htm#AbstractThinking" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#AbstractThinking">

Abstract Thinking</A>

<LI><A HREF="ch14.htm#OverridingMethodswithPolymorphism" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#OverridingMethodswithPolymorphism">

Overriding Methods with Polymorphism</A>

<LI><A HREF="ch14.htm#KeepingCodeandDataTogetherwithENCapsulation" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#KeepingCodeandDataTogetherwithENCapsulation">

Keeping Code and Data Together with ENCapsulation</A>

<LI><A HREF="ch14.htm#HowPerlHandlesObjects" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#HowPerlHandlesObjects">

How Perl Handles Objects</A>

<UL>

<LI><A HREF="ch14.htm#ExampleBlesstheHashandPasstheRefereNCe" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ExampleBlesstheHashandPasstheRefereNCe">

Example: Bless the Hash and Pass the RefereNCe</A>

<LI><A HREF="ch14.htm#ExampleInitializingProperties" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ExampleInitializingProperties">

Example: Initializing Properties</A>

<LI><A HREF="ch14.htm#ExampleUsingNamedParametersinConstructors" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ExampleUsingNamedParametersinConstructors">

Example: Using Named Parameters in Constructors</A>

<LI><A HREF="ch14.htm#ExampleInheritaNCePerlStyle" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ExampleInheritaNCePerlStyle">

Example: InheritaNCe, Perl Style</A>

<LI><A HREF="ch14.htm#ExamplePolymorphism" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ExamplePolymorphism">

Example: Polymorphism</A>

<LI><A HREF="ch14.htm#ExampleHowOneClassCanContainAnother" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ExampleHowOneClassCanContainAnother">

Example: How One Class Can Contain Another</A>

</UL>

<LI><A HREF="ch14.htm#StaticVersusRegularMethodsandVariables" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#StaticVersusRegularMethodsandVariables">

Static Versus Regular Methods and Variables</A>

<LI><A HREF="ch14.htm#Summary" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#Summary">

Summary</A>

<LI><A HREF="ch14.htm#ReviewQuestions" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ReviewQuestions">

Review Questions</A>

<LI><A HREF="ch14.htm#ReviewExercises" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch14.htm#ReviewExercises">

Review Exercises</A>

</UL>



<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter </FONT></I><FONT SIZE=5 COLOR=#FF0000>15

</FONT><FONT SIZE=5>&nbsp;&nbsp;Perl Modules</FONT></H2>

<UL>

<LI><A HREF="ch15.htm#ModuleConstructorsandDestructors" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ModuleConstructorsandDestructors">

Module Constructors and Destructors</A>

<UL>

<LI><A HREF="ch15.htm#TheTTFONTSIZEFACECourierBEGINFONTTTFONTSIZEBlockFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TheTTFONTSIZEFACECourierBEGINFONTTTFONTSIZEBlockFONT">

The <TT>BEGIN </TT>Block</FONT>

</A>

<LI><A HREF="ch15.htm#TheTTFONTSIZEFACECourierENDFONTTTFONTSIZEBlockFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TheTTFONTSIZEFACECourierENDFONTTTFONTSIZEBlockFONT">

The <TT>END</TT>

Block</FONT></A>

</UL>

<LI><A HREF="ch15.htm#SymbolTables" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#SymbolTables">

Symbol Tables</A>

<LI><A HREF="ch15.htm#TheTTFONTSIZEFACECourierrequireFONTTTFONTSIZECompilerDirectiveFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TheTTFONTSIZEFACECourierrequireFONTTTFONTSIZECompilerDirectiveFONT">

The <TT>require</TT>

Compiler Directive</FONT></A>

<LI><A HREF="ch15.htm#TheTTFONTSIZEFACECourieruseFONTTTFONTSIZECompilerDirectiveFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TheTTFONTSIZEFACECourieruseFONTTTFONTSIZECompilerDirectiveFONT">

The <TT>use</TT>

Compiler Directive</FONT></A>

<LI><A HREF="ch15.htm#WhatsaPragma" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#WhatsaPragma">

What's a Pragma?</A>

<LI><A HREF="ch15.htm#TheTTFONTSIZEFACECourierstrictFONTTTFONTSIZEPragmaFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TheTTFONTSIZEFACECourierstrictFONTTTFONTSIZEPragmaFONT">

The <TT>strict</TT>

Pragma</FONT></A>

<LI><A HREF="ch15.htm#TheStandardModules" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TheStandardModules">

The Standard Modules</A>

<LI><A HREF="ch15.htm#TTFONTSIZEFACECourierstrictmyFONTTTFONTSIZEandModulesFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#TTFONTSIZEFACECourierstrictmyFONTTTFONTSIZEandModulesFONT">

<TT>strict, my() </TT>and

Modules</FONT></A>

<LI><A HREF="ch15.htm#ModuleExamples" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ModuleExamples">

Module Examples</A>

<UL>

<LI><A HREF="ch15.htm#ExampleTheTTFONTSIZEFACECourierCarpFONTTTFONTSIZEModuleFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ExampleTheTTFONTSIZEFACECourierCarpFONTTTFONTSIZEModuleFONT">

Example: The <TT>Carp</TT>

Module</FONT></A>

<LI><A HREF="ch15.htm#ExampleTheTTFONTSIZEFACECourierEnglishFONTTTFONTSIZEModuleFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ExampleTheTTFONTSIZEFACECourierEnglishFONTTTFONTSIZEModuleFONT">

Example: The <TT>English</TT>

Module</FONT></A>

<LI><A HREF="ch15.htm#ExampleTheTTFONTSIZEFACECourierEnvFONTTTFONTSIZEModuleFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ExampleTheTTFONTSIZEFACECourierEnvFONTTTFONTSIZEModuleFONT">

Example: The <TT>Env </TT>Module</FONT>

</A>

</UL>

<LI><A HREF="ch15.htm#Summary" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#Summary">

Summary</A>

<LI><A HREF="ch15.htm#ReviewQuestions" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ReviewQuestions">

Review Questions</A>

<LI><A HREF="ch15.htm#ReviewExercises" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch15.htm#ReviewExercises">

Review Exercises</A>

</UL>



<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter </FONT></I><FONT SIZE=5 COLOR=#FF0000>16

</FONT><FONT SIZE=5>&nbsp;&nbsp;Debugging Perl</FONT></H2>

<UL>

<LI><A HREF="ch16.htm#SyntaxErrors" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#SyntaxErrors">

Syntax Errors</A>

<LI><A HREF="ch16.htm#CommonSyntaxErrors" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#CommonSyntaxErrors">

Common Syntax Errors</A>

<LI><A HREF="ch16.htm#LogicErrors" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#LogicErrors">

Logic Errors</A>

<UL>

<LI><A HREF="ch16.htm#UsingtheTTFONTSIZEFACECourierwFONTTTFONTSIZECommandLineOptionFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#UsingtheTTFONTSIZEFACECourierwFONTTTFONTSIZECommandLineOptionFONT">

Using the <TT>-w</TT>

Command-Line Option</FONT></A>

<LI><A HREF="ch16.htm#BeingStrictwithYourVariables" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#BeingStrictwithYourVariables">

Being Strict with Your Variables</A>

<LI><A HREF="ch16.htm#SteppingThroughYourScript" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#SteppingThroughYourScript">

Stepping Through Your Script</A>

<LI><A HREF="ch16.htm#ExamplesDisplayingInformation" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ExamplesDisplayingInformation">

Examples: Displaying Information</A>

<LI><A HREF="ch16.htm#ExamplesUsingtheFONTSIZEFACELBIHelveticaBlackObliquenFONTFONTSIZECommandFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ExamplesUsingtheFONTSIZEFACELBIHelveticaBlackObliquenFONTFONTSIZECommandFONT">

Examples: Using the n

Command</A>

<LI><A HREF="ch16.htm#ExamplesUsingBreakpoints" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ExamplesUsingBreakpoints">

Examples: Using Breakpoints</A>

<LI><A HREF="ch16.htm#ExamplesCreatingCommandAliases" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ExamplesCreatingCommandAliases">

Examples: Creating Command Aliases</A>

<LI><A HREF="ch16.htm#ExamplesUsingtheDebuggerasanInteractiveInterpreter" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ExamplesUsingtheDebuggerasanInteractiveInterpreter">

Examples: Using the Debugger as an Interactive Interpreter

</A>

</UL>

<LI><A HREF="ch16.htm#Summary" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#Summary">

Summary</A>

<LI><A HREF="ch16.htm#ReviewQuestions" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ReviewQuestions">

Review Questions</A>

<LI><A HREF="ch16.htm#ReviewExercises" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch16.htm#ReviewExercises">

Review Exercises</A>

</UL>



<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter </FONT></I><FONT SIZE=5 COLOR=#FF0000>17

</FONT><FONT SIZE=5>&nbsp;&nbsp;Using Command-Line Options</FONT></H2>

<UL>

<LI><A HREF="ch17.htm#HowAretheOptionsSpecified" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#HowAretheOptionsSpecified">

How Are the Options Specified?</A>

<LI><A HREF="ch17.htm#WhatAretheOptions" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#WhatAretheOptions">

What Are the Options?</A>

<UL>

<LI><A HREF="ch17.htm#ExampleUsingtheTTFONTSIZEFACECourierFONTTTFONTSIZEOptionFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#ExampleUsingtheTTFONTSIZEFACECourierFONTTTFONTSIZEOptionFONT">

Example: Using the <TT>-0</TT>

Option</FONT></A>

<LI><A HREF="ch17.htm#ExampleUsingtheTTFONTSIZEFACECouriernFONTTTFONTSIZEandFONTTTFONTSIZEFACECourierpFONTTTFONTSIZEOptionsFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#ExampleUsingtheTTFONTSIZEFACECouriernFONTTTFONTSIZEandFONTTTFONTSIZEFACECourierpFONTTTFONTSIZEOptionsFONT">

Example: Using the <TT>-n</TT>

and </FONT><TT>-p</TT>

Options</FONT></A>

<LI><A HREF="ch17.htm#ExampleUsingtheTTFONTSIZEFACECourieriFONTTTFONTSIZEOptionFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#ExampleUsingtheTTFONTSIZEFACECourieriFONTTTFONTSIZEOptionFONT">

Example: Using the <TT>-i</TT>

Option</FONT></A>

<LI><A HREF="ch17.htm#ExampleUsingtheTTFONTSIZEFACECouriersFONTTTFONTSIZEOptionFONT" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#ExampleUsingtheTTFONTSIZEFACECouriersFONTTTFONTSIZEOptionFONT">

Example: Using the <TT>-s</TT>

Option</FONT></A>

</UL>

<LI><A HREF="ch17.htm#Summary" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#Summary">

Summary</A>

<LI><A HREF="ch17.htm#ReviewQuestions" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#ReviewQuestions">

Review Questions</A>

<LI><A HREF="ch17.htm#ReviewExercises" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch17.htm#ReviewExercises">

Review Exercises</A>

</UL>



<H2><I><FONT SIZE=5 COLOR=#FF0000>Chapter </FONT></I><FONT SIZE=5 COLOR=#FF0000>18

</FONT><FONT SIZE=5>&nbsp;&nbsp;Using Internet Protocols</FONT></H2>

<UL>

<LI><A HREF="ch18.htm#Sockets" tppabs="http://cheminf.nankai.edu.cn/~eb~/Perl%205%20By%20Example/ch18.htm#Sockets">

Sockets</A>