The usual way to have several implementations of a function is to place them in a package namespace. If the modules furnish an object constructor, calling the runonce() method will automatically select the correct one.

To call a non-method runonce() from a package, use the fully-qualified name, 

Package::Name::runonce();

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To call once for each package loaded, you'll need to go through all the loaded packages and try each. Here's an unsophisticated way to do it, 
for (keys %INC) {
    s!/!::!g;
    s/\.pm$//;
    eval { $_::runonce() };
}

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The eval is used to trap fatal errors from packages which don't define runonce().

After Compline,
Zaxo

In reply to Re: Same function multiples unknown modules by Zaxo
in thread Same function multiples unknown modules by Delusional

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