Perl初学笔记之Hello World

工作需要开始学perl,下载个window版(5.16)的: 下载链接
http://www.activestate.com/activeperl/downloads
安装好了之后，写第一个perl程序

#!/usr/bin/perl 
print "hello,world!\n";

运行结果: (很像python哦)

c:\perl>perl helloworld.pl 
hello,world!

接着学了下:cpan,虽然不知道这家伙具体是干嘛，应该是能安装各种包，9000多种。
命令如下：看第二次输出的结果，应该是类似于数据库的东东吧。

c:\perl>cpan app::cpanminus 
set up gcc environment - 3.4.5 (mingw-vista special r3) 
cpan: term::ansicolor loaded ok (v4.02) 
cpan: storable loaded ok (v2.34) 
reading 'c:\perl\cpan\metadata' 
database was generated on fri, 07 mar 2014 13:06:13 gmt 
cpan: module::corelist loaded ok (v2.80) 
app::cpanminus is up to date (1.7001). 

然后用cpanm安装模块，命令如下: (cpanm module::name)

c:\perl>cpanm yaml 
set up gcc environment - 3.4.5 (mingw-vista special r3) 
--> working on yaml 
fetching http://www.cpan.org/authors/id/i/in/ingy/yaml-0.90.tar.gz ... ok 
configuring yaml-0.90 ... ok 
building and testing yaml-0.90 ... ok 
successfully installed yaml-0.90 
1 distribution installed 

如果实在不晓得如何用的话: cpanm --help    //-->会看到很多提示。

c:\perl>cpanm --help 
set up gcc environment - 3.4.5 (mingw-vista special r3) 
usage: cpanm [options] module [...] 
 
options: 
  -v,--verbose              turns on chatty output 
  -q,--quiet                turns off the most output 

看上面的安装过程，好像是可以执行cpanm link,果然是可以:

c:\perl>cpanm http://search.cpan.org/cpan/authors/id/s/sh/sharyanto/alt-base-0.0 
2.tar.gz 
set up gcc environment - 3.4.5 (mingw-vista special r3) 
--> working on http://search.cpan.org/cpan/authors/id/s/sh/sharyanto/alt-base-0. 
02.tar.gz 
fetching http://search.cpan.org/cpan/authors/id/s/sh/sharyanto/alt-base-0.02.tar 
.gz ... ok 
configuring alt-base-0.02 ... ok 
==> found dependencies: alt 
--> working on alt 
fetching http://www.cpan.org/authors/id/i/in/ingy/alt-0.04.tar.gz ... ok 
configuring alt-0.04 ... ok 
building and testing alt-0.04 ... ok 
successfully installed alt-0.04 
building and testing alt-base-0.02 ... ok 
successfully installed alt-base-0.02 
2 distributions installed 

然后开始写了个文件操作的脚本，里面有个path::class模块。

use path::class; 
c:\perl\learn>perl findfile.pl 
can't locate path/class.pm in @inc (@inc contains: c:/perl/site/lib/mswin32-x86- 
multi-thread c:/perl/site/lib c:/perl/lib .) at findfile.pl line 4. 
begin failed--compilation aborted at findfile.pl line 4. 

看提示，像没有安装该包，安装了下该包，结果果然没报这种错误:

c:\perl\learn>cpanm path::class 
set up gcc environment - 3.4.5 (mingw-vista special r3) 
--> working on path::class 
fetching http://www.cpan.org/authors/id/k/kw/kwilliams/path-class-0.33.tar.gz .. 
. ok 
configuring path-class-0.33 ... ok 
building and testing path-class-0.33 ... ok 
successfully installed path-class-0.33 
1 distribution installed 

完~