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Learning Perl (Nutshell Handbook) (Englisch) Taschenbuch – Juli 1997

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Produktbeschreibungen

Amazon.de

When it comes to working a little "behind the scenes" magic for a Web site or putting together a UNIX script which interrogate databases and produce reports based on the information they contain, there are few better languages to do the job than Perl.

Learning Perl draws on the expertise of two of the major supporters of this highly flexible language, Randal Schwatrz and Tom Christiansen, to produce an introductory manual which manages to be concise yet informative throughout.

Weighing in at a mere (for a computer manual) 271 pages it achieves admirably what it sets out to do--teach Perl basics and no more. From the introduction to the different variable types through hash arrays, file access, process management and coding for the World Wide Web, it's a well-paced easy-to-understand book which assumes a rudimentary knowledge of programming but no more.

With its multitude of clear examples which help to hammer home the many points made and set exercises at the end of each chapter, it builds knowledge rather than drowning the reader with information as many other books seem to do.

This is the first in a series of books on the subject from O'Reilly Publishing, the others being Programming Perl, Advanced Perl Programming and the Perl Cookbook and it truly is a great introduction to a language which is enthusiastically supported by developers and Web coders worldwide. Well worth a read.

Synopsis

In this update of a bestseller, two leading Perl trainers teach you to use the most universal scripting language in the age of the World Wide Web. With a foreword by Larry Wall, the creator of Perl, this smooth, carefully paced book is the "official" guide for both formal (classroom) and informal learning. It is now current for Perl version 5.004. Learning Perl is a hands-on tutorial designed to get you writing useful Perl scripts as quickly as possible. Exercises (with complete solutions) accompany each chapter. A lengthy, new chapter in this edition introduces you to CGI programming, while touching also on the use of library modules, references, and Perl's object-oriented constructs. Perl is a language for easily manipulating text, files, and processes. It comes standard on most UNIX platforms and is available free of charge on all other important operating systems. Perl technical support is informally available -- often within minutes -- from a pool of experts who monitor a USENET newsgroup (comp.lang.perl.misc) with tens of thousands of readers.

Contents include: A quick tutorial stroll through Perl basics Systematic, topic-by-topic coverage of Perl's broad capabilities Lots of brief code examples Programming exercises for each topic, with fully worked-out answers How to execute system commands from your Perl program How to manage DBM databases using Perl An introduction to CGI programming for the Web

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Format: Taschenbuch
I've been a Unix user for seven+ years, and have some programming experience, although I am by no means really knowledgable about either. When I entered my most recent job, I needed to learn Perl fast, and so I used this book to help me get started.
From a self-teaching perspective, I found this book to be exactly what I needed. I'll admit that the first chapter (a general description of the Perl language) was not very helpful, but I found the division of the rest of the book by small pieces of the syntax (scalars, arrays, hashes, regular functions, i/o, etc.) to suit my needs, which tended to be along the lines of: I need to do x right now. I learned the easy stuff really quickly, and I still use the book as a constant reference.
Now, it is just a beginner's text, so it is not an ideal complete reference, and you won't learn anything particularly nifty. However, if you need to both learn how to program and actually do some programming at the same time (i.e. not in a class-room setting), Learning Perl can be a wonderful text.
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Excellent.
I came to this book knowing next to nothing about Perl, and with a few misconceptions to boot (that Perl's syntax is 'write-only', it's primarily a CGI tool, etc.), and now I am not sure that epiphany would cover it. In 12 years of learning and using programming languages, I don't think I have come across anything so enchanting.
One of the best parts of the book: the authors. Add Schwartz & Christiansen to Elliotte Rusty Harold, Petzold, and a very few others who are truly effective technical writers. Classic O'Reilly easygoing style, never condescending, and eerily consistent in presenting just the right amount of information on the given topic.
Every programmer (even non-Perl ones) should read 'Programming Perl' by Larry Wall. But to learn Perl, and take the first step down a long and magical road, buy this book.
I had a few nits, but by the time I finished the book, I had forgotten most of them. As close to 5 stars as I will ever give for a technical book.
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Format: Taschenbuch
This accessible and practical book can make a Non-Programmer into a Proud CGI Guru, given that the beginner understands some basic logical structures, and is willing to meet the authors halfway.
PROBLEM 1: The book assumes a fairly extensive Unix background, so doesn't always explain itself where that's concerned. SOLUTION: Just ignore the bits that don't apply to you and keep going.
PROBLEM 2: The first chapter can be intimidating. SOLUTION: Understand it to be an overview: "Here's what you can do with perl." Run its programs to see how they work, experiment with them, but don't freak out if you don't understand them completely. Alternately, just skip on to Chapter 2.
We enjoyed Learning Perl, and found it a good beginner's book for this language or for programming in general. The touches of humor could be annoying to some, but we thought they added readability and interest.
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Von Ein Kunde am 1. August 2000
Format: Taschenbuch
A very, very good book for beginners. Extremely helpful, detailed explanations of what's going on and more. It says UNIX on the cover but I am using a Windows NT platform and almost everything works as is. If you want to learn Perl, start here.
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This is not a bad book, but I'm still surprised by the generosity of the reader reviews. Perl is something of a cult, so I think in a lot of cases a positive review means "I like Perl" more than it means "I like 'Learning Perl.'" People hesitate (understandably, I think) to insult a book that's closely associated with a great open-source language.
I myself think Perl is great, but I have some serious problems with the way this book was written and edited. The authors can't seem to decide whether this should be an easy book for programmers, a difficult book for non-programmers, or even (at times) an easy book for non-programmers. That is to say, the tone, style, and assumptions about the audience change throughout, sometimes from page to page. Key concepts are glossed over with a minimum of explanation (the chapter on hashes, particularly, is a disgrace); then, defying all reason, very simple concepts are overexplained for two or three pages. The authors have been too close to their subject for too long, and they seem to have forgotten what they learned and the order in which they learned it. Maybe a newbie co-author might have helped.
If you are an experienced developer or are comfortable with UNIX, you'll get a lot of benefit from "llama." Otherwise, though, start with another book, or learn something about UNIX first. Then return to this book, and you should have an easier time of it.
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Von Ein Kunde am 27. April 2000
Format: Taschenbuch
I picked up Learning Perl with very little programming experience (only having completed a compulsory Visual Basic course in high school), and found it easy to read and understand.
The first chapter, A stroll Through Perl, is perhaps the biggest flaw in the book. Rather than introducing the capabilities of Perl (which I think is what the author's intended), it bogs the new reader down in detail and seems to set forth an avalanche of cryptic code at you. It was so bad that, thinking that Chapter 1 was an indication of the rest of the book (ie it was all too cryptic and meant for seasoned programmers), I set the book aside for a few months.
I came back to the book when a friend of mine picked it up, and, after skimming over Chapter 1, was pleasantly suprised. The rest of the book is easy to read and understand, though at times a little dense for the new programmer, and immediately useful. The examples are good illustrations of implementation ideas for concepts described in a chapter, and the excercises at the end of each chapter are good indications of what you've learnt. The book introduces new concepts smoothly and quickly integrates them into existing material, and culminates in an especially interesting and useful chapter on CGI (which is really what I wanted to use Perl for).
Overall, it's a great book, even for people who are new to programming: with a little dedication you'll be able to blaze through the chapters and become proficient at Perl basics. Some organisational errors let it down and make the introductory pages unjustifiably daunting for those new to programming, but other than that, it was a very satisfying and self-contained tutorial for Perl users.
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