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When a module has been assimilated into the language, the original module is still available in CPAN, but its use is deprecated. Do not import deprecated modules. It is perfectly valid to use their features, as they are now integrated into the core language.
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use UNIVERSAL qw(can); # deprecated
# ...
sub doit {
my ($func) = @_;
if (can($self, $func)) {
$self->$func();
}
# ...
}
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# use UNIVERSAL qw(can); # deprecated
# ... rest of code
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