I have a []byte, b, and I want to select a single byte, b[pos] and change it too upper case (and then lower case) The bytes type has a method called ToUpper(). How can I use this for a single byte?
Calling ToUpper on single Byte
OneOfOne gave the most efficient (when calling thousands of times), I use
val = byte(unicode.ToUpper(rune(b[pos])))
in order to find the byte and change the value
b[pos] = val
Checking if byte is Upper
Sometimes, instead of changing the case of a byte, I want to check if a byte is upper or lower case; All the upper case roman-alphabet bytes are lower than the value of the lower case bytes.
func (b Board) isUpper(x int) bool {
return b.board[x] < []byte{0x5a}[0]
}
