在Perl中用YAML来实现配置文件

通常，大家都习惯于用XML写配置文件或是描述一些简单的数据结构。其实，在Perl中，用YAML更好。有关YAML的详细说明，请参看这里：http://www.yaml.org/spec/

YAML是一个很适合人类阅读的标记语言，可以被大多数的现代语言用来作数据结构。

Perl的YAML.pm模块可以直接上CPAN下载，官方网页是：

http://search.cpan.org/~ingy/YAML-0.66/lib/YAML.pm

基本上读一读下面这段英文，就明白YAML怎么用了。

use YAML;

# Load a YAML stream of 3 YAML documents into Perl data structures.
my ($hashref, $arrayref, $string) = Load(&lt;&lt;'...');
---
name: ingy
age: old
weight: heavy
# I should comment that I also like pink, but don't tell anybody.
favorite colors:
    - red
    - green
    - blue
---
- Clark Evans
- Oren Ben-Kiki
- Ingy dÃ¶t Net
--- &gt;
You probably think YAML stands for "Yet Another Markup Language". It
ain't! YAML is really a data serialization language. But if you want
to think of it as a markup, that's OK with me. A lot of people try
to use XML as a serialization format.

"YAML" is catchy and fun to say. Try it. "YAML, YAML, YAML!!!"
...

# Dump the Perl data structures back into YAML.
print Dump($string, $arrayref, $hashref);

# YAML::Dump is used the same way you'd use Data::Dumper::Dumper
use Data::Dumper;
print Dumper($string, $arrayref, $hashref);</pre>

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