Range over int (#61)

Author: sunshineplan

csv/writer.go

@@ -56,7 +56,7 @@ func (w *Writer) WriteFields(fields any) error {
 			return fmt.Errorf("can not get fieldnames from zero field struct")
 		}
 
-		for i := 0; i < v.NumField(); i++ {
+		for i := range v.NumField() {
 			if f := v.Type().Field(i); f.IsExported() {
 				tag, _ := v.Type().Field(i).Tag.Lookup("csv")
 				w.fields = append(w.fields, field{v.Type().Field(i).Name, tag})
@@ -147,7 +147,7 @@ func (w *Writer) Write(record any) error {
 		for i, field := range w.fields {
 			var val reflect.Value
 			var found bool
-			for i := 0; i < v.NumField(); i++ {
+			for i := range v.NumField() {
 				if tag, ok := v.Type().Field(i).Tag.Lookup("csv"); ok && tag == field.tag {
 					val = v.FieldByName(field.name)
 					found = true
@@ -199,7 +199,7 @@ func (w *Writer) WriteAll(records any) error {
 	}
 
 	v := reflect.ValueOf(records)
-	for i := 0; i < v.Len(); i++ {
+	for i := range v.Len() {
 		if err := w.Write(v.Index(i).Interface()); err != nil {
 			return err
 		}

executor/method.go

@@ -71,7 +71,7 @@ func Execute[T any](argMethod, fnMethod Method, limit int, args []T, fn ...func(
 			rand.Shuffle(count, func(i, j int) { clone[i], clone[j] = clone[j], clone[i] })
 		}
 
-		for i := 0; i < count; i++ {
+		for i := range count {
 			ctx := argContext(len(fn), clone[i])
 			workers.RunSlice(limit, fn, func(_ int, fn func(T) (any, error)) {
 				ctx.runFn(fn, result, lasterr)

loadbalance/random.go

@@ -36,7 +36,7 @@ func WeightedRandom[E any](items ...Weighted[E]) (LoadBalancer[E], error) {
 func (r *random[E]) load() {
 	length := len(r.items)
 	var s []int
-	for i := 0; i < length; i++ {
+	for i := range length {
 		s = append(s, i)
 	}
 	rand.Shuffle(length, func(i, j int) { s[i], s[j] = s[j], s[i] })

loadbalance/random_test.go

@@ -18,7 +18,7 @@ func TestRandom(t *testing.T) {
 		t.Error(err)
 	} else {
 		var res []string
-		for i := 0; i < 6; i++ {
+		for range 6 {
 			res = append(res, loadbalancer.Next())
 		}
 		sort.Strings(res)
@@ -32,7 +32,7 @@ func TestRandom(t *testing.T) {
 		t.Error(err)
 	} else {
 		var res []string
-		for i := 0; i < 8; i++ {
+		for range 8 {
 			res = append(res, loadbalancer.Next())
 		}
 		sort.Strings(res)

loadbalance/roundrobin_test.go

@@ -17,7 +17,7 @@ func TestRoundRobin(t *testing.T) {
 		t.Error(err)
 	} else {
 		var res []string
-		for i := 0; i < 6; i++ {
+		for range 6 {
 			res = append(res, loadbalancer.Next())
 		}
 		if expect := []string{a, b, c, a, b, c}; !reflect.DeepEqual(res, expect) {
@@ -30,7 +30,7 @@ func TestRoundRobin(t *testing.T) {
 		t.Error(err)
 	} else {
 		var res []string
-		for i := 0; i < 8; i++ {
+		for range 8 {
 			res = append(res, loadbalancer.Next())
 		}
 		if expect := []string{a, a, b, c, a, a, b, c}; !reflect.DeepEqual(res, expect) {

progressbar/progressbar_test.go

@@ -17,17 +17,15 @@ func TestProgessBar(t *testing.T) {
 
 	pb := New(15).SetRefresh(4 * time.Second)
 	pb.Start()
-	for i := int64(0); i < pb.total; i++ {
-		//log.Print(i)
+	for range pb.total {
 		pb.Add(1)
 		time.Sleep(time.Second)
 	}
 	pb.Done()
 
 	pb = New(10).SetRefresh(500 * time.Millisecond)
 	pb.Start()
-	for i := int64(0); i < pb.total; i++ {
-		//log.Print(i)
+	for range pb.total {
 		pb.Add(1)
 		time.Sleep(time.Second)
 	}
@@ -45,7 +43,7 @@ func TestCancel(t *testing.T) {
 		pb.Cancel()
 	}()
 	go func() {
-		for i := int64(0); i < pb.total; i++ {
+		for range pb.total {
 			pb.Add(1)
 			time.Sleep(time.Second)
 		}

retry/retry.go

@@ -36,7 +36,7 @@ func ErrNoMoreRetry(err string) error { return errorNoMoreRetry(err) }
 // Do keeps retrying the function until no error is returned.
 func Do(fn func() error, attempts, delay int) error {
 	var errs []error
-	for i := 0; i < attempts; i++ {
+	for i := range attempts {
 		err := fn()
 		if err == nil {
 			return nil

workers/workers.go

@@ -71,15 +71,15 @@ func RunSlice[E any](limit int, s []E, f func(int, E)) {
 	}
 
 	c := make(chan struct{}, limit)
-	for i := 0; i < len(s); i++ {
+	for i := range len(s) {
 		c <- struct{}{}
 		go func(index int, value E) {
 			defer func() { <-c }()
 			f(index, value)
 		}(i, s[i])
 	}
 
-	for i := 0; i < limit; i++ {
+	for range limit {
 		c <- struct{}{}
 	}
 	close(c)
@@ -102,7 +102,7 @@ func RunMap[K comparable, V any](limit int, m map[K]V, f func(K, V)) {
 		}(k, v)
 	}
 
-	for i := 0; i < limit; i++ {
+	for range limit {
 		c <- struct{}{}
 	}
 	close(c)
@@ -129,7 +129,7 @@ func RunRange[Int Integer](limit int, start, end Int, f func(Int)) {
 		}(i)
 	}
 
-	for i := 0; i < limit; i++ {
+	for range limit {
 		c <- struct{}{}
 	}
 	close(c)