package server import () func lowerSlice(buf []byte) []byte { for i, r := range buf { if 'A' <= r && r <= 'Z' { r += 'a' - 'A' } buf[i] = r } return buf } func upperSlice(buf []byte) []byte { for i, r := range buf { if 'a' <= r && r <= 'z' { r -= 'a' - 'A' } buf[i] = r } return buf }