in reply to Where and when you should place 'use module;'?
A module is loaded at compile time, no matter where you place the use Module (except in an eval STRING). A module cannot be 'unloaded', although those that specify an unimport may allow you to turn off any semantics that they export using no Module. If you want a module to be loaded only on first demand, you could require it instead.
I personally prefer to put all my use statements at the top of the file (so I know which modules my code needs to run in a single glance), although others may prefer to put them in the subroutines that actually need their functions/semantics.
I wasn't expecting this though:
use strict; use warnings; foo(); print Dumper [4,5,6]; sub foo { use Data::Dumper; print Dumper [1,2,3]; } print Dumper [7,8,9];
__CONDENSED_OUTPUT__ $VAR1 = [1,2,3]; print() on unopened filehandle Dumper at D:\perl\t.pl line 4. $VAR1 = [7,8,9];
Why isn't the third print Dumper 'correctly misinterpreted'?
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Re^2: Where and when you should place 'use module;'?
by revdiablo (Prior) on Oct 12, 2005 at 20:31 UTC |
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