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Re: RE: Modules

by Elliott (Pilgrim)
on Oct 10, 2001 at 19:53 UTC ( #118027=note: print w/ replies, xml ) Need Help??


in reply to RE: Modules
in thread Stock Quotes

KM says: If you have a reluctant sysadmin, you can still install modules under your home directory. Then you can change @INC to look there, or PERL5LIB.

I am sorry this question is begging for an RTFM answer, but please be gentle with me! I have been looking for the right M to FR for many months!

Pretty please, can someone explain what KM said in simpler words? Or tell me where to find a real newbie's guide to installing modules?

Firstly, what does "home directory" mean? Is this cgi-bin or the directory which contains it?

Secondly, what does "change @INC to look there" mean. What is @INC and how do I change it? And will I still be able to use the sysadmin's modules?

I am using Perl remotely on my webhost's server.


Comment on Re: RE: Modules
Re: Re: RE: Modules
by dragonchild (Archbishop) on Oct 10, 2001 at 20:02 UTC
    Firstly, what does "home directory" mean? Is this cgi-bin or the directory which contains it?

    Read the Unix manual. It's the directory you start in when you log into your webhost.

    Secondly, what does "change @INC to look there" mean. What is @INC and how do I change it? And will I still be able to use the sysadmin's modules?

    @INC is the list of directories that Perl uses to find the modules you requested that it bring into your script, like CGI or IO::File or whatever. You modify it by doing a

    use lib '/this/directory/has/neat/modules';
    @INC lookups are done last added first. Thus, if you added a directory, but the module you're use-ing or require-ing isn't there, it looks in the next entry in @INC. You already have a number of entries that are default. use lib 'somedir'; simply says "Look here first. If it isn't here, then look where you would've looked if I hadn't done this."

    As for you installing your own modules ... Learn more about Unix first. It sounds like you're a newbie to Unix in general. You'll have more headaches installing modules than you know what to do with. Of course, if you don't mind that, you'll learn a heck of a lot about Unix installing modules...

    As for learning Unix, go to a local library and borrow some books. It's a big learning curve, so don't expect to be an expert in a week, month, or even a year. But, you can expect to become at least proficient in a week or two.

    ------
    We are the carpenters and bricklayers of the Information Age.

    Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.

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