Perl Programming: Clear and Complete Guide

Автор: literator от 8-09-2020, 14:48, Коментариев: 0

Категория: КНИГИ » ПРОГРАММИРОВАНИЕ

Perl Programming: Clear and Complete GuideНазвание: Perl Programming: Clear and Complete Guide
Автор: Carl K. Martin
Издательство: Amazon.com Services LLC
Год: 2020
Страниц: 656
Язык: английский
Формат: pdf, azw3, epub
Размер: 11.1 MB

The seeds of this book were sown many years ago, when I was building up my knowledge of Perl, the greatest programming language I’d ever encountered (before or since). While reading a variety of books on the subject, I was surprised that the authors felt obliged to delve into so many of the different but equivalent choices for expressing every basic operation in the language, as well as each of the syntactic variations for expressing any one of those choices.

As an example, I’ve shown here some of the available choices for expressing in Perl the simple idea that B should be executed only if A is True (with those letters representing arbitrary program elements). Both forward and backward variations for expressing the dependency are included.

Part 1 gives those with at least user-level Unix skills—which includes even the most advanced Unix programmers—a gentle introduction to the use of Minimal Perl’s most essential features. We’ll start with a humorous allegory about a Traveler from the world of Unix who’s visiting Perlistan, which leads to a discussion of the “less is more” philosophy underlying Minimal Perl. Then in chapter 2 we’ll cover the most essential features of the Minimal Perl dialect, which is a strategically crafted subset of standard Perl designed for easy assimilation by Unix people. In the following chapters, we’ll use those features to develop tiny Perl programs that surpass the limitations of some of the most important Unix commands - grep, sed, awk, and find. Because they are relevant to a wide range of problem areas, we’ll concentrate on programs that do data validation, file conversion, report generation, and number crunching.

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