Publisher: Addison-Wesley Professional 2004 | English | ISBN-10: 0201795264 | 336 pages | 6.7 MiB
This book is about taking over Perl code, whether written by someone
else or by yourself at an earlier time. Developers regularly estimate
that they spend 60 to 80 percent of their time working with existing
code. Many problems of code inheritance are common to all languages, but
the nature of the language makes Perl especially tricky. The reason why
is that Perl is similar to English – bursting with irregular verbs,
consistent only when it’s convenient, borrowing terms from other
languages, and providing many ways to say the same thing. In fact, Perl
developers have a motto with the abbreviation TMTOWTDI: There’s More
Than One Way To Do It. While this flexibility is one of the language’s
strengths, it also makes it extremely difficult when you are faced with
an existing piece of code. There are millions of lines of Perl code
being used all over the Web; much of it was built on an ad hoc basis,
the creators never imagining that the code would still be in use months
or years later.
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