How to `Serial.print()` “full” hexadecimal bytes?

Question

I am programming Arduino and I am trying to Serial.print() bytes in hexadecimal format \"the my way\" (keep reading for more information).

That is, by u

Answer 1

The lowest footprint in Memory, Code and runtime would be classic bit playing

byte b;
Serial.print(b>>4,  HEX);
Serial.print(b&0x0F,HEX);

Which is working fine on any 8bit type. For any other mask also the first line to

Serial.print((b>>4)&0x0F,  HEX);