NAME Scalar::Util - A selection of general-utility scalar subroutines SYNOPSIS use Scalar::Util qw(blessed dualvar isdual readonly refaddr reftype tainted weaken isweak isvstring looks_like_number set_prototype); # and other useful utils appearing below DESCRIPTION Scalar::Util contains a selection of subroutines that people have expressed would be nice to have in the perl core, but the usage woul