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Elements of Programming with Perl Andrew L. Johnson 1999 | 368 pages ISBN: 1884777805 |
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$34.95 | Softbound print book | |
Table of Contents
preface xiacknowledgments xv
I Introductory elements
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1 Introduction 3
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1.1 On programming 4
1.2 On Perl 7
Getting started 10, Running Perl 11, Getting help 121.3 A bigger picture 15
2 Writing code 18
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2.1 Structure 20
2.2 Naming 21
2.3 Comments 24
2.4 Being strict 29
2.5 A quick style guide 31
3 Writing programs 32
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3.1 A first program 34
Specification 34, Design 35, Coding 40, Testing and debugging 45, Maintenance 473.2 faqgrep 49
3.3 Exercises 55
II Essential elements
4 Data: types and variables 59
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4.1 Scalar data 60
Scalar variables 634.2 Expressions 65
4.3 List data 67
Array variables 69, Hash variables 714.4 Context 73
4.5 References to variables 74
4.6 Putting it together 76
4.7 Exercises 77
5 Control structures 78
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5.1 Selection statements 80
5.2 Repetition: loops 84
5.3 Logical operators 89
5.4 Statement modifiers 92
5.5 Putting it together 92
5.6 Exercises 97
6 Simple I/O and text processing 98
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6.1 File handles 99
6.2 Pattern matching 103
Matching constructs 105, Regex language constructs 107, Matching and substitution operators 1126.3 Split and join 113
6.4 The DATA file handle 114
6.5 Putting it together 116
6.6 Exercises 120
7 Functions 121
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7.1 Scope 123
7.2 Global variables 127
7.3 Parameters 127
7.4 Return values 129
7.5 Designing functions 131
7.6 Parameters and references 134
7.7 Recursion 135
7.8 Putting it together 137
Revisiting the mathq program 137, Routine examples 1397.9 Exercises 140
8 References and aggregate data structures 141
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8.1 Creating references 143
Nested or multi-dimensional arrays 147, Nested hashes 149, Mixed structures 1498.2 Scope and references 150
8.3 References to functions 152
Closures 1538.4 Nested structures on the fly 155
8.5 Review 158
8.6 Exercises 159
9 Documentation 160
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9.1 User documentation and POD 161
9.2 Source code documentation 164
Other uses of LP 1699.3 Tangling code 170
A simple tangler 1709.4 Further resources 178
III Practical elements
10 Regular expressions 183
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10.1 The basic components 184
10.2 The character class 188
Search and replace: capitalize headings 189, Character class shortcuts 19110.3 Greedy quantifiers: take what you can get 191
10.4 Non-greedy quantifiers: take what you need 192
10.5 Simple anchors 193
10.6 Grouping, capturing, and backreferences 195
Prime number regex 19610.7 Other anchors: lookahead and lookbehind 198
Inserting commas in a number 19810.8 Exercises 201
11 Working with text 202
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11.1 The match operator 203
Context of the match operator 20611.2 The substitution operator 207
11.3 Strings within strings 208
11.4 Translating characters 211
11.5 Exercises 212
12 Working with lists 214
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12.1 Processing a list 215
12.2 Filtering a list 217
12.3 Sorting lists 217
12.4 Chaining functions 221
12.5 Reverse revisited 223
12.6 Exercises 224
13 More I/O 225
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13.1 Running external commands 226
13.2 Reading and writing from/to external commands 227
13.3 Working with directories 228
13.4 Filetest operators 229
13.5 faqgrep revisited 230
13.6 Exercises 233
14 Using modules 234
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14.1 Installing modules 236
14.2 Using modules 237
14.3 File::Basename 238
14.4 Command line options 239
14.5 The dating game 241
14.6 Fetching webpages 243
Stock quotes and graphs 24314.7 CGI.pm 249
14.8 Reuse, don't reinvent 253
14.9 Exercises 255
15 Debugging 256
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15.1 Debugging by hand 257
15.2 The Perl debugger 262
IV Advanced elements
16 Modular programming 271
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16.1 Modules and packages 272
16.2 Making a module 274
16.3 Why make modules? 278
16.4 Exercises 279
17 Algorithms and data structuring 280
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17.1 Searching 281
17.2 Sorting 283
17.3 Heap sort 286
17.4 Exercises 291
18 Object-oriented programming and abstract data structures 292
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18.1 What is OOP? 293
18.2 OOP in Perl 295
The basics 295, Inheritance 29918.3 Abstract data structures 301
18.4 Stacks, queues, and linked lists 301
Stacks 301, Queues 307, Linked lists 30918.5 Exercises 314
19 More OOP examples 315
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19.1 The heap as an abstract data structure 316
19.2 Grades: an object example 320
19.3 Exercises 330
20 What's left? 331
appendix A Command line switches 333
appendix B Special variables 336
appendix C Additional resources 338
appendix D Numeric formats 340
glossary 342
index 348
DESCRIPTION
As the complexity of web sites grows, more and more webmasters need to acquire programming skills. Naturally, such persons are inclined to learn Perl, the "language of the web." However, there has been no book to treat Perl as the first programming language; every Perl book assumes that the reader can program already.
Until now.
Elements of Programming with Perl is a general introduction to programming, using Perl as the implementation language. It starts at the beginning, teaching programming style, structure, and design. It covers all the fundamental elements of Perl (e.g., pattern matching and text processing) and proceeds to advanced concepts, including modular programming, abstract data structures, and object oriented programming.
Elements of Programming with Perl contains numerous examples and diagrams that illustrate concepts, algorithms and techniques. Complete example programs show the new programmer how to tie concepts together to solve real-world problems.
Elements of Programming with Perl is designed for the new programmer who needs to know Perl, and for the regular Perl user who would like to improve his or her programming skills.
Translation rights for Elements of Programming with Perl have been granted for France, Germany, India and Japan. If you are interested in learning where to buy this book in a language other than English, please inquire at your local bookseller.
WHAT THE EXPERTS SAY ABOUT THIS BOOK...
"It is a very good introduction to Perl -- and programming -- for the neophyte who has never taken a programming course, or the webmaster who never learned the lessons that would be taught in one. It makes a great companion to the Llama for those who need more thorough explanations, or just like a little theory with their tools."
--Rachel Rawlings at perlmonth.com
"This book would appear to fall neatly between Learning Perl, which is targeted not only to the Perl beginner, but to the programming beginner as well, and Programming Perl, making it an ideal entry text for experienced programmers in other languages."
--Editor Arthur Corliss with Alaska Perl Mongers
"New to programming, and think Perl may be up your alley? Andrew Johnson's excellent Elements of Programming with Perl will teach you both disciplines...From the start, Johnson's explanations are clean and clear. It's obvious that he's polished his didactic style through years of real world teaching. Also from the start, good programming practices receive due emphasis...
This is a good introduction to Perl, and a very good introduction to programming in general. Johnson promotes good habits and discipline... It's a rare book that teaches as well as it informs, so take the plunge and teach yourself Perl and programming."
--chromatic, slashdot.org
"It seems quite clear that Elements of Programming with Perl is the first book that you would want to actually recommend…[which teaches Perl to non-programmers]…without worrying that they'll have to be entirely retrained afterwards. Johnson does a good job of presenting the basics. After a short introduction to both programming and Perl, the book moves immediately on to structure and style…I am quite happy to recommend this title. The book is informative and clear, and is a good introduction to basic programming and Perl."
--David Adler, Perl Mongers User Group
"Continuing to expand its very strong series of Perl books, Manning Publications has come out with Elements of Programming with Perl, a beginner's Perl text that's meant, in part, to compete with O'Reilly & Associates' Learning Perl and other standard texts of the Perl programming community. Elements of Programming with Perl communicates the basics of the language without the smarty-pants tone that the O'Reilly book slips into from time to time.
...this book provides an excellent introduction to procedural programming concepts (and the special rules of regular expressions), using Perl as a medium. It's a great book for novice and intermediate programmers."
--David Wall, The Development Exchange Enterprise ZoneWHAT THE READERS SAY ABOUT THIS BOOK...
"I learnt enough about Perl from this book to actually be productive with it, and it was enjoyable enough to encourage me to start playing with the language."
--Kelsey Gray, Perl NewbieABOUT THE AUTHOR...
Not only does Andrew L. Johnson hold a master's degree in anthropology, but he also has more than 15 years of experience programming in a variety of languages. As a consultant he does custom data manipulation and analysis programming for market research. He has written training materials, articles for scientific journals, and articles and reviews for the Linux Journal. He has been a regular contributor to the comp.lang.perl.misc newsgroup.
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