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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简介
｜
17
像其他任何一种语言一样，
Perl
也能写出叫人看不懂的程序，有人说它是“只写的
（
write-only
）”代码，能写出来但无法看明白。其实只要你稍加注意，就可以避
免。没错，
Perl
程序对门外汉来说，看起来可能像天书；但对经验丰富的
Perl
程序
员来说，它就像大型交响乐团的总谱。你只要遵照书里的指引，就能写出易于阅读
和维护的程序。当然，用这些循规蹈矩写出来的程序是赢不了戏玩
Perl
代码大赛
（
Obfuscated Perl Contest
）的。
Perl
怎么流行起来的？
Larry
捣鼓了一阵子后，就把
Perl
发布到
Usenet
读者社群，当时人们称之为“网络
（
Net.
）”。这个社群里散居世界各处的上万名用户给了他诸多反馈，提出想要
Perl
支持的各种新特性，而其中有许多都是
Larry
一开始未曾想过要用他的
Perl
去处理
的。
然后，
Perl
就不断成长，功能变得越来越丰富，可以执行它的操作系统也在不断增
加。这个开始只能在少数几种
Unix
系统上执行的小语言，慢慢地成长为如今具有上
千页在线自由文档、成打书籍、数个拥有无数读者的主流
Usenet
新闻组（以及主流
之外的成堆新闻组与邮件列表）、近乎所有系统皆可使用的语言。当然在这个过程
中，还衍生出了这本“小骆驼书”。
现在的
Perl
有何进展？
Perl 5
的开发经历了多年演变，在各个方面都有长足进步。与此同时，开发者们翘首
以盼它的继任者，全面革新的
Perl 6
。经过多年的尝试和磨砺之后， ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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.