How to use formatLenCap method of gop Package

...198		} else {199			ts = append(ts, typeName(v.Type().String()))200		}201		if v.Kind() == reflect.Slice && v.Cap() > 0 {202			ts = append(ts, &Token{Comment, formatLenCap(v.Len(), v.Cap())})203		}204		ts = append(ts, &Token{SliceOpen, "{"})205		for i := 0; i < v.Len(); i++ {206			p := append(p, i)207			el := v.Index(i)208			ts = append(ts, &Token{SliceItem, ""})209			ts = append(ts, tokenize(sn, p, el)...)210			ts = append(ts, &Token{Comma, ","})211		}212		ts = append(ts, &Token{SliceClose, "}"})213	case reflect.Map:214		ts = append(ts, typeName(v.Type().String()))215		keys := v.MapKeys()216		sort.Slice(keys, func(i, j int) bool {217			return compare(keys[i].Interface(), keys[j].Interface()) < 0218		})219		if len(keys) > 1 {220			ts = append(ts, &Token{Comment, formatLenCap(len(keys), -1)})221		}222		ts = append(ts, &Token{MapOpen, "{"})223		for _, k := range keys {224			p := append(p, k.Interface())225			ts = append(ts, &Token{MapKey, ""})226			ts = append(ts, tokenize(sn, p, k)...)227			ts = append(ts, &Token{Colon, ":"})228			ts = append(ts, tokenize(sn, p, v.MapIndex(k))...)229			ts = append(ts, &Token{Comma, ","})230		}231		ts = append(ts, &Token{MapClose, "}"})232	case reflect.Struct:233		t := v.Type()234		ts = append(ts, typeName(t.String()))235		ts = append(ts, &Token{StructOpen, "{"})236		for i := 0; i < v.NumField(); i++ {237			name := t.Field(i).Name238			ts = append(ts, &Token{StructKey, ""})239			ts = append(ts, &Token{StructField, name})240			f := v.Field(i)241			if !f.CanInterface() {242				f = GetPrivateField(v, i)243			}244			ts = append(ts, &Token{Colon, ":"})245			ts = append(ts, tokenize(sn, append(p, name), f)...)246			ts = append(ts, &Token{Comma, ","})247		}248		ts = append(ts, &Token{StructClose, "}"})249	}250	return ts251}252func tokenizeNumber(v reflect.Value) []*Token {253	t := &Token{Nil, ""}254	ts := []*Token{}255	tname := v.Type().String()256	switch v.Kind() {257	case reflect.Int:258		t.Type = Number259		t.Literal = strconv.FormatInt(v.Int(), 10)260		if tname != "int" {261			ts = append(ts, typeName(tname), &Token{ParenOpen, "("}, t, &Token{ParenClose, ")"})262		} else {263			ts = append(ts, t)264		}265	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:266		ts = append(ts, typeName(tname), &Token{ParenOpen, "("})267		t.Type = Number268		t.Literal = strconv.FormatInt(v.Int(), 10)269		ts = append(ts, t, &Token{ParenClose, ")"})270	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:271		ts = append(ts, typeName(tname), &Token{ParenOpen, "("})272		t.Type = Number273		t.Literal = strconv.FormatUint(v.Uint(), 10)274		ts = append(ts, t, &Token{ParenClose, ")"})275	case reflect.Float32:276		ts = append(ts, typeName(tname), &Token{ParenOpen, "("})277		t.Type = Number278		t.Literal = strconv.FormatFloat(v.Float(), 'f', -1, 32)279		ts = append(ts, t, &Token{ParenClose, ")"})280	case reflect.Float64:281		t.Type = Number282		t.Literal = strconv.FormatFloat(v.Float(), 'f', -1, 64)283		if !strings.Contains(t.Literal, ".") {284			t.Literal += ".0"285		}286		if tname != "float64" {287			ts = append(ts, typeName(tname), &Token{ParenOpen, "("}, t, &Token{ParenClose, ")"})288		} else {289			ts = append(ts, t)290		}291	case reflect.Complex64:292		ts = append(ts, typeName(tname), &Token{ParenOpen, "("})293		t.Type = Number294		t.Literal = strconv.FormatComplex(v.Complex(), 'f', -1, 64)295		t.Literal = t.Literal[1 : len(t.Literal)-1]296		ts = append(ts, t, &Token{ParenClose, ")"})297	case reflect.Complex128:298		t.Type = Number299		t.Literal = strconv.FormatComplex(v.Complex(), 'f', -1, 128)300		t.Literal = t.Literal[1 : len(t.Literal)-1]301		if tname != "complex128" {302			ts = append(ts, typeName(tname), &Token{ParenOpen, "("}, t, &Token{ParenClose, ")"})303		} else {304			ts = append(ts, t)305		}306	}307	return ts308}309func tokenizeByte(t *Token, b byte) []*Token {310	ts := []*Token{typeName("byte"), {ParenOpen, "("}}311	r := rune(b)312	if unicode.IsGraphic(r) {313		ts = append(ts, &Token{Byte, strconv.QuoteRune(r)})314	} else {315		ts = append(ts, &Token{Byte, "0x" + strconv.FormatUint(uint64(b), 16)})316	}317	return append(ts, &Token{ParenClose, ")"})318}319func tokenizeTime(t time.Time) []*Token {320	ext := GetPrivateFieldByName(reflect.ValueOf(t), "ext").Int()321	ts := []*Token{{Func, SymbolTime}, {ParenOpen, "("}}322	ts = append(ts, &Token{String, t.Format(time.RFC3339Nano)})323	ts = append(ts, &Token{InlineComma, ","}, &Token{Number, strconv.FormatInt(ext, 10)}, &Token{ParenClose, ")"})324	return ts325}326func tokenizeDuration(d time.Duration) []*Token {327	ts := []*Token{}328	ts = append(ts, typeName(SymbolDuration), &Token{ParenOpen, "("})329	ts = append(ts, &Token{String, d.String()})330	ts = append(ts, &Token{ParenClose, ")"})331	return ts332}333func tokenizeString(v reflect.Value) []*Token {334	s := v.String()335	ts := []*Token{{String, s}}336	if v.Len() >= LongStringLen {337		ts = append(ts, &Token{Comment, formatLenCap(len(s), -1)})338	}339	return ts340}341func tokenizeBytes(data []byte) []*Token {342	ts := []*Token{}343	if utf8.Valid(data) {344		s := string(data)345		ts = append(ts, typeName("[]byte"), &Token{ParenOpen, "("})346		ts = append(ts, &Token{String, s})347		ts = append(ts, &Token{ParenClose, ")"})348	} else {349		ts = append(ts, &Token{Func, SymbolBase64}, &Token{ParenOpen, "("})350		ts = append(ts, &Token{String, base64.StdEncoding.EncodeToString(data)})351		ts = append(ts, &Token{ParenClose, ")"})352	}353	if len(data) >= LongBytesLen {354		ts = append(ts, &Token{Comment, formatLenCap(len(data), -1)})355	}356	return ts357}358func tokenizePtr(sn seen, p path, v reflect.Value) []*Token {359	ts := []*Token{}360	if v.Elem().Kind() == reflect.Invalid {361		ts = append(ts,362			&Token{ParenOpen, "("}, typeName(v.Type().String()), &Token{ParenClose, ")"},363			&Token{ParenOpen, "("}, &Token{Nil, "nil"}, &Token{ParenClose, ")"})364		return ts365	}366	fn := false367	switch v.Elem().Kind() {368	case reflect.Struct, reflect.Map, reflect.Slice, reflect.Array:...

...36}37func wrapComment(s string) string {38	return "/* " + s + " */"39}40func formatLenCap(l, c int) string {41	if c >= 0 {42		return fmt.Sprintf("/* len=%d cap=%d */", l, c)43	}44	return fmt.Sprintf("/* len=%d */", l)45}...

1import "fmt"2func main() {3    slice := []int{10, 20, 30, 40, 50}4    fmt.Printf("slice = %v5    fmt.Printf("len(slice) = %d cap(slice) = %d6", len(slice), cap(slice))7    fmt.Printf("slice = %v8    fmt.Printf("len(slice) = %d cap(slice) = %d9", len(slice), cap(slice))10    fmt.Printf("slice = %v11    fmt.Printf("len(slice) = %d cap(slice) = %d12", len(slice), cap(slice))13    fmt.Printf("slice = %v14    fmt.Printf("len(slice) = %d cap(slice) = %d15", len(slice), cap(slice))16}17len(slice) = 5 cap(slice) = 518len(slice) = 0 cap(slice) = 519len(slice) = 4 cap(slice) = 520len(slice) = 2 cap(slice) = 3

1import "fmt"2func main() {3    gop = append(gop, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)4    fmt.Println("Length is", gop.formatLenCap())5}6func (gop gop) formatLenCap() string {7    return fmt.Sprintf("%d %d", len(gop), cap(gop))8}9import "fmt"10func main() {11    gop = append(gop, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)12    fmt.Println("Length is", gop.formatLenCap())13}14func (gop gop) formatLenCap() string {15    return fmt.Sprintf("%d %d", len(gop), cap(gop))16}17./3.go:6:5: gop.formatLenCap undefined (type gop has no field or method formatLenCap)18type Vertex struct {19}20func (v Vertex) Abs() float64 {21    return math.Sqrt(v.X*v.X + v.Y*v.Y)22}

1import (2func main() {3	g := gop.Gop{1, 2, 3, 4, 5}4	fmt.Println(g.FormatLenCap())5}6You can also pass the gop variable to the fmt.Println() function as follows:7fmt.Println(g)8{1 2 3 4 5}9Go: How to Use the String() Method10Go: How to Use the Errorf() Method11Go: How to Use the Fatalf() Method12Go: How to Use the Panic() Method13Go: How to Use the Panicf() Method14Go: How to Use the Panicln() Method15Go: How to Use the Printf() Method16Go: How to Use the Println() Method17Go: How to Use the Sprintf() Method18Go: How to Use the Sprintln() Method19Go: How to Use the Error() Method20Go: How to Use the Errorf() Method21Go: How to Use the Fatalf() Method22Go: How to Use the Panic() Method23Go: How to Use the Panicf() Method24Go: How to Use the Panicln() Method25Go: How to Use the Printf() Method26Go: How to Use the Println() Method27Go: How to Use the Sprintf() Method28Go: How to Use the Sprintln() Method29Go: How to Use the Error() Method30Go: How to Use the Errorf() Method31Go: How to Use the Fatalf() Method32Go: How to Use the Panic() Method33Go: How to Use the Panicf() Method34Go: How to Use the Panicln() Method35Go: How to Use the Printf() Method36Go: How to Use the Println() Method

1import (2func main() {3	g = gop{1, 2, 3}4	fmt.Println(g.formatLenCap())5}6import (7func main() {8	g = gop{1, 2, 3}9	fmt.Println(g.formatLenCap())10}11import (12func main() {13	g = gop{1, 2, 3}14	fmt.Println(g.formatLenCap())15}16import (17func main() {18	g = gop{1, 2, 3}19	fmt.Println(g.formatLenCap())20}21import (22func main() {23	g = gop{1, 2, 3}24	fmt.Println(g.formatLenCap())25}26import (27func main() {28	g = gop{1, 2, 3}29	fmt.Println(g.formatLenCap())30}31import (32func main() {33	g = gop{1, 2, 3}34	fmt.Println(g.formatLenCap())35}36import (37func main() {38	g = gop{1, 2, 3}39	fmt.Println(g.formatLenCap())40}41import (42func main() {43	g = gop{1,

1import (2func main() {3    r := strings.NewReader("some io.Reader stream to be read")4    p := Newgop(r)5    fmt.Println(p.String())6    fmt.Println(p.formatLenCap(25))7}

1import (2func main() {3	var gop = gop{}4	gop.formatLenCap()5}6import (7type gop struct {8}9func (gop) formatLenCap() {10	var x = []int{10, 20, 30, 40, 50}11	fmt.Printf("x : %v12	fmt.Printf("len(x) : %v13", len(x))14	fmt.Printf("cap(x) : %v15", cap(x))16}17len(x) : 518cap(x) : 5

1import (2func main() {3    gop := gop.New("gop")4    fmt.Println(gop.FormatLenCap())5}6import (7func main() {8    gop := gop.New("gop")9    fmt.Println(gop.FormatLenCap())10    gop = gop.Append("gop")11    fmt.Println(gop.FormatLenCap())12}13import (14func main() {15    gop := gop.New("gop")16    fmt.Println(gop.FormatLenCap())17    gop = gop.Append("gop")18    fmt.Println(gop.FormatLenCap())19    gop = gop.Append("gop")20    fmt.Println(gop.FormatLenCap())21}22import (23func main() {24    gop := gop.New("gop")25    fmt.Println(gop.FormatLenCap())26    gop = gop.Append("gop")27    fmt.Println(gop.FormatLenCap())28    gop = gop.Append("gop")29    fmt.Println(gop.FormatLenCap())30    gop = gop.Append("gop")31    fmt.Println(gop.FormatLenCap())32}