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

    复制代码 代码如下:
    #!/usr/bin/perl 
    print “Hello,World!\n”;

    运行结果: (很像Python哦)

    复制代码 代码如下:
    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。

    复制代码 代码如下:
    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)

    复制代码 代码如下:
    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。

    复制代码 代码如下:
    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:

    复制代码 代码如下:
    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。

    复制代码 代码如下:
    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:

    复制代码 代码如下:
    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~

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