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#! perl -slw
use strict; use Config;
...
1.#SNAN0
0
4e414e53232e31

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Notionally, a fully loaded SV looks vaguely like this:

...
SV*->[ SVANY ]->[   IV   ]
     [ FLAGS ]  [   NV   ]<-+
                [   PV   ]--+    Point the PV at the memory holding th
+e NV.