October 2022
Beginner to intermediate
390 pages
7h 5m
Chinese
Content preview from Perl语言入门（第8版）
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14
｜
第
1
章
我们还有一本辅导用书
Learning Perl Exercises
，它针对每个章节都额外增加了若干习
题。如果你手里的这本工具书是之前版本的话，注意调整一下章节顺序就好了。
“
Perl
”这个词表示什么意思？
Perl
有时候被称为“实用摘录与报表语言（
Practical Extraction and Report
Language
）”，但也会被称为“病态折中式垃圾列表器（
Pathologically Eclectic
Rubbish Lister
）”。除此之外，这个词的缩写还可以展开为其他不同的名称来诠释。
Perl
是个溯写字（
backronym
），而不是缩写词（
acronym
），这是因为
Larry Wall
，
也就是
Perl
的缔造者，是先想出要用这个词，然后再考虑如何展开解释的。要争论哪
种全名才是正确的并无太大意义，无论哪种
Larry
都认可。
你可能会在某些技术文章里看到以小写
p
来表示“
perl
”。一般来说大写
P
表示的
“
Perl
”指的是
Perl
这种语言，而小写
p
表示的“
perl
”指的是编译并运行程序的
perl
解释器。
Larry
为什么要创造
Perl
？
20
世纪
80
年代中期，
Larry
想要为类似新闻组的文件体系写一个
bug
（缺陷）汇报
系统，当时用的是
awk
，但马上发现无法满足需求。于是，作为一名以懒惰为美德的
程序员，
Larry
决定从根本上解决这类问题，写一个通用工具，让它不仅能解决眼下
碰到的问题，将来也能在别的地方派上用场。于是， ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.