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Re: use depending on environment

by Xaositect (Friar)
on Jun 22, 2005 at 15:57 UTC ( #469068=note: print w/replies, xml ) Need Help??


in reply to use depending on environment

Using a begin block is preferrable if you can get away with it, but if you can't know whether or not you want to load a module at compile-time, try using 'require' instead of 'use'. 'require' will load the module at run-time. ( 'use' is equivilant to BEGIN { require MODULE; } )

In general, 'use' is preferable because it gives the compiler more information about the symbols in your namespace. For example, where you might have done

use Data::Dumper; print Dumper $foo;
You can't just substitute require because then the compiler won't know where the "Dumper" function comes from. Instead you have to do something like
require Data::Dumper; print Data::Dumper::Dumper($foo);


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