Changing PM File at Run time

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks,
I have a PM File in which data is stored from the source file that i select at runtime. In run time if i change the file the data is getting updated in the PM file but the updated data is not executed in the application. Only the data that is loaded at first is getting executed. I am using
require <file name >
Can any one give me a clue on how to do this?

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Re: Changing PM File at Run time by moritz (Cardinal) on Dec 10, 2008 at 08:47 UTC
Delete it from %INC, and require it again. But .pm files aren't the best way to store data. Either use a serialization format like YAML, JSON or CSV or plain text files. If it has to be a perl script that holds the data, do EXPR or eval might be more appropriate.	[reply]
Re^2: Changing PM File at Run time by Anonymous Monk on Dec 10, 2008 at 16:56 UTC
or even better, embedded perl in a yaml file	[reply]
Re: Changing PM File at Run time by Anonymous Monk on Dec 10, 2008 at 08:10 UTC
perldoc -f require Require will not reload an already loaded file.	[reply]
Re^2: Changing PM File at Run time by Anonymous Monk on Dec 10, 2008 at 08:12 UTC
See tutorial Including files	[reply]
Re: Changing PM File at Run time by tsee (Curate) on Dec 11, 2008 at 08:53 UTC
Check out the Class::Unload module on CPAN. It takes care of almost all the icky details of unloading a module from memory. Afterwards, you can simply reload the module with "require" or "use".	[reply]
Re: Changing PM File at Run time by djp (Hermit) on Dec 12, 2008 at 01:16 UTC
Others have told you how to do this, but I have to say this sounds like a Really Bad Idea. Load the data from a file, not from a .pm.	[reply]
Re: Changing PM File at Run time by mrpeabody (Friar) on Dec 13, 2008 at 14:18 UTC
1) You should put the data in a separate file from your source code. 2) You can't ask Perl to automatically update your variables when your data file changes. You have to do it by hand, perhaps on-demand or by checking the file's last-modified time on a regular basis.	[reply]