get_binary: returns the binary internal representation of the objarray. Useful to avoid conversion from string or to string, or, for instance, to change from integer to chars.
objarray get_binary <obj>
e.g.
set obj [objarray new intarray -values {5 6 7 8}]
-> 5 6 7 8
puts [binary encode base64 [objarray get_binary $obj]]
-> BQAAAAYAAAAHAAAACAAAAA==
set obj2 [objarray new intarray -binary [objarray get_binary $obj]]
-> 5 6 7 8
set obj3 [objarray new chararray -binary [objarray get_binary $obj]]
-> 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0