chore: use range

meter/tplink/connection.go

@@ -36,7 +36,7 @@ func (d *Connection) ExecCmd(cmd string, res interface{}) error {
 	// encode command message
 	buf := bytes.NewBuffer([]byte{0, 0, 0, 0})
 	var key byte = 171 // initialization vector
-	for i := 0; i < len(cmd); i++ {
+	for i := range cmd {
 		key ^= cmd[i]
 		_ = buf.WriteByte(key)
 	}

server/modbus/handler.go

@@ -19,7 +19,7 @@ type handler struct {
 
 func bytesAsUint16(b []byte) []uint16 {
 	u := make([]uint16, 0, len(b)/2)
-	for i := 0; i < len(b)/2; i++ {
+	for i := range len(b) / 2 {
 		u = append(u, binary.BigEndian.Uint16(b[2*i:]))
 	}
 	return u

tariff/tariff.go

@@ -126,7 +126,7 @@ func (t *Tariff) priceRates() (api.Rates, error) {
 	res := make(api.Rates, 48)
 	start := now.BeginningOfHour()
 
-	for i := 0; i < len(res); i++ {
+	for i := range res {
 		slot := start.Add(time.Duration(i) * time.Hour)
 		res[i] = api.Rate{
 			Start: slot,

vehicle/bluelink/identity.go

@@ -399,7 +399,7 @@ func (v *Identity) stamp() (string, error) {
 	}
 
 	enc := make([]byte, 0, 50)
-	for i := 0; i < len(cfb); i++ {
+	for i := range cfb {
 		enc = append(enc, cfb[i]^raw[i])
 	}