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~$ locale < ... all set to hu_HU.UTF-8 ... > ... [004] ~$ perl -e 'use Gtk2 -init; printf(q{%f}, 123.456);' 123,456000
[005] ~$ perl -e 'use Gtk2 -init; print unpack("H*", 123.789) . "\n";' 3132332c373839 ... [009] ~$ perl -e 'use Gtk2 -init; print unpack("H*", 123.789 . "") . " +\n";' 3132332c373839