Perl语言入门(第6版)
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Questions and Answers 1
Is This the Right Book for You? 1
Why Are There So Many Footnotes? 2
What About the Exercises and Their Answers? 3
What Do Those Numbers Mean at the Start of the Exercise? 4
What If I’m a Perl Course Instructor? 4
What Does “Perl” Stand For? 4
Why Did Larry Create Perl? 5
Why Didn’t Larry Just Use Some Other Language? 5
Is Perl Easy or Hard? 6
How Did Perl Get to Be So Popular? 7
What’s Happening with Perl Now? 7
What’s Perl Really Good For? 8
What Is Perl Not Good For? 8
How Can I Get Perl? 9
What Is CPAN? 10
How Can I Get Support for Perl? 10
Are There Any Other Kinds of Support? 10
What If I Find a Bug in Perl? 12
How Do I Make a Perl Program? 12
A Simple Program 13
What’s Inside That Program? 15
How Do I Compile My Perl Program? 16
A Whirlwind Tour of Perl 17
Exercises 18
2. Scalar Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Numbers 21
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