It's really a unary operator (getting only one argument) that may be borrowed from C, wherever all knowledge types are just other ways of interpreting bytes. It's the "invert" or "complement" operation, during which the many bits with the input details are reversed. If that's the case, the decreased bound https://marcowimzf.bloggazzo.com/26390272/swith-things-to-know-before-you-buy