fix: coding style and file format for all example.

eBook/examples/chapter_10/embed_func1.go

@@ -37,6 +37,7 @@ func (l *Log) String() string {
 func (c *Customer) Log() *Log {
 	return c.log
 }
+
 /* Output:
 1 - Yes we can!
 2 - After me the world will be a better place!

eBook/examples/chapter_10/main.go

@@ -1,8 +1,8 @@
 package main
 
 import (
-	"fmt"
 	"./struct_pack/structPack"
+	"fmt"
 )
 
 func main() {
@@ -12,5 +12,6 @@ func main() {
 	fmt.Printf("Mi1 = %d\n", struct1.Mi1)
 	fmt.Printf("Mf1 = %f\n", struct1.Mf1)
 }
+
 // Mi1 = 10
 // Mf1 = 16.000000

eBook/examples/chapter_10/method_on_time.go

@@ -19,6 +19,7 @@ func main() {
 	fmt.Println("Full time now:", m.String())      //calling existing String method on anonymous Time field
 	fmt.Println("First 3 chars:", m.first3Chars()) //calling myTime.first3Chars
 }
+
 /* Output:
 Full time now: Mon Oct 24 15:34:54 Romance Daylight Time 2011
 First 3 chars: Mon

eBook/examples/chapter_10/method_string.go

@@ -23,5 +23,3 @@ func main() {
 func (tn *TwoInts) String() string {
 	return "(" + strconv.Itoa(tn.a) + " / " + strconv.Itoa(tn.b) + ")"
 }
-
-

eBook/examples/chapter_10/methodset1.go

@@ -6,6 +6,7 @@ import (
 )
 
 type List []int
+
 func (l List) Len() int        { return len(l) }
 func (l *List) Append(val int) { *l = append(*l, val) }
 

eBook/examples/chapter_10/mult_inheritance.go

@@ -3,15 +3,15 @@ package main
 
 import "fmt"
 
-type Camera struct { } 
+type Camera struct{}
 
 func (c *Camera) TakeAPicture() string {
 	return "Click"
 }
 
-type Phone struct { } 
+type Phone struct{}
 
-func (p *Phone ) Call() string { 
+func (p *Phone) Call() string {
 	return "Ring Ring"
 }
 
@@ -27,6 +27,7 @@ func main() {
 	fmt.Println("It exhibits behavior of a Camera: ", cp.TakeAPicture())
 	fmt.Println("It works like a Phone too: ", cp.Call())
 }
+
 /* Output:
 Our new CameraPhone exhibits multiple behaviors ...
 It exhibits behavior of a Camera:  Click

eBook/examples/chapter_10/person.go

@@ -10,30 +10,31 @@ type Person struct {
 	lastName  string
 }
 
-func upPerson (p *Person) {
+func upPerson(p *Person) {
 	p.firstName = strings.ToUpper(p.firstName)
 	p.lastName = strings.ToUpper(p.lastName)
 }
 
 func main() {
-// 1- struct as a value type:
+	// 1- struct as a value type:
 	var pers1 Person
 	pers1.firstName = "Chris"
 	pers1.lastName = "Woodward"
 	upPerson(&pers1)
 	fmt.Printf("The name of the person is %s %s\n", pers1.firstName, pers1.lastName)
-// 2 - struct as a pointer:
+	// 2 - struct as a pointer:
 	pers2 := new(Person)
 	pers2.firstName = "Chris"
 	pers2.lastName = "Woodward"
 	(*pers2).lastName = "Woodward"
 	upPerson(pers2)
 	fmt.Printf("The name of the person is %s %s\n", pers2.firstName, pers2.lastName)
-// 3 - struct as a literal:
-	pers3 := &Person{"Chris","Woodward"}
+	// 3 - struct as a literal:
+	pers3 := &Person{"Chris", "Woodward"}
 	upPerson(pers3)
 	fmt.Printf("The name of the person is %s %s\n", pers3.firstName, pers3.lastName)
 }
+
 /* Output:
 The name of the person is CHRIS WOODWARD
 The name of the person is CHRIS WOODWARD

eBook/examples/chapter_10/person2.go

@@ -12,6 +12,3 @@ func (p *Person) FirstName() string {
 func (p *Person) SetFirstName(newName string) {
 	p.firstName = newName
 }
-
-
-

eBook/examples/chapter_10/pointer_value.go

@@ -22,6 +22,7 @@ func main() {
 	b2.change()
 	fmt.Println(b2.write())
 }
+
 /* Output:
 {1}
 {1}

eBook/examples/chapter_10/struct_conversions.go

@@ -21,4 +21,5 @@ func main() {
 	var c = number(b)
 	fmt.Println(a, b, c)
 }
+
 // output: {5} {5} {5}

eBook/examples/chapter_10/struct_tag.go

@@ -13,7 +13,7 @@ type TagType struct {  //  tags
 
 func main() {
 	tt := TagType{true, "Barak Obama", 1}
-	for i:= 0; i < 3; i++ {
+	for i := 0; i < 3; i++ {
 		refTag(tt, i)
 	}
 }
@@ -23,6 +23,7 @@ func refTag(tt TagType, ix int) {
 	ixField := ttType.Field(ix)
 	fmt.Printf("%v\n", ixField.Tag)
 }
+
 /* Output:
 An important answer
 The name of the thing

eBook/examples/chapter_10/use_person2.go

@@ -1,8 +1,8 @@
 package main
 
 import (
-	"fmt"
 	"./person"
+	"fmt"
 )
 
 func main() {

eBook/examples/chapter_11/cars.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 )
 
-
 type Any interface{}
 type Car struct {
 	Model        string
@@ -17,7 +16,7 @@ type Cars []*Car
 
 func main() {
 	// make some cars:
-	ford := &Car{"Fiesta","Ford", 2008}
+	ford := &Car{"Fiesta", "Ford", 2008}
 	bmw := &Car{"XL 450", "BMW", 2011}
 	merc := &Car{"D600", "Mercedes", 2009}
 	bmw2 := &Car{"X 800", "BMW", 2008}

eBook/examples/chapter_11/emptyint_switch.go

@@ -29,4 +29,5 @@ func TypeSwitch() {
 func main() {
 	TypeSwitch()
 }
+
 // Output:  any hello is a special String!

eBook/examples/chapter_11/interfaces.go

@@ -27,4 +27,5 @@ func main() {
 	areaIntf := sq1
 	fmt.Printf("The square has area: %f\n", areaIntf.Area())
 }
+
 // The square has area: 25.000000

eBook/examples/chapter_11/interfaces_poly.go

@@ -28,11 +28,12 @@ func main() {
 	q := &Square{5}      // Area() of Square needs a pointer
 	shapes := []Shaper{r, q}
 	fmt.Println("Looping through shapes for area ...")
-   for n, _ := range shapes {
+	for n := range shapes {
 		fmt.Println("Shape details: ", shapes[n])
 		fmt.Println("Area of this shape is: ", shapes[n].Area())
 	}
 }
+
 /* Output:
 Looping through shapes for area ...
 Shape details:  {5 3}
@@ -40,6 +41,3 @@ Area of this shape is:  15
 Shape details:  &{5}
 Area of this shape is:  25
 */
-
-
-

eBook/examples/chapter_11/methodset2.go

@@ -6,6 +6,7 @@ import (
 )
 
 type List []int
+
 func (l List) Len() int        { return len(l) }
 func (l *List) Append(val int) { *l = append(*l, val) }
 

eBook/examples/chapter_11/multi_interfaces_poly.go

@@ -40,17 +40,18 @@ func main() {
 	q := &Square{5}      // Area() of Square needs a pointer
 	shapes := []Shaper{r, q}
 	fmt.Println("Looping through shapes for area ...")
-	for n, _ := range shapes {
+	for n := range shapes {
 		fmt.Println("Shape details: ", shapes[n])
 		fmt.Println("Area of this shape is: ", shapes[n].Area())
 	}
 	topgen := []TopologicalGenus{r, q}
 	fmt.Println("Looping through topgen for rank ...")
-	for n, _ := range topgen {
+	for n := range topgen {
 		fmt.Println("Shape details: ", topgen[n])
 		fmt.Println("Topological Genus of this shape is: ", topgen[n].Rank())
 	}
 }
+
 /* Output:
 Looping through shapes for area ...
 Shape details:  {5 3}

eBook/examples/chapter_11/node_structures.go

@@ -18,12 +18,12 @@ func (n *Node) SetData(data interface{}) {
 }
 
 func main() {
-	root := NewNode(nil,nil)
+	root := NewNode(nil, nil)
 	root.SetData("root node")
 	// make child (leaf) nodes:
-	a := NewNode(nil,nil)
+	a := NewNode(nil, nil)
 	a.SetData("left node")
-	b := NewNode(nil,nil)
+	b := NewNode(nil, nil)
 	b.SetData("right node")
 	root.le = a
 	root.ri = b

eBook/examples/chapter_11/print.go

@@ -13,7 +13,7 @@ type Stringer interface {
 type Celsius float64
 
 func (c Celsius) String() string {
-	return strconv.FormatFloat(float64(c),'f', 1, 64) + " °C"
+	return strconv.FormatFloat(float64(c), 'f', 1, 64) + " °C"
 }
 
 type Day int
@@ -26,13 +26,19 @@ func (day Day) String() string {
 
 func print(args ...interface{}) {
 	for i, arg := range args {
-		if i > 0 {os.Stdout.WriteString(" ")}
+		if i > 0 {
+			os.Stdout.WriteString(" ")
+		}
 		switch a := arg.(type) { // type switch
-			case Stringer:	os.Stdout.WriteString(a.String())
-			case int:		os.Stdout.WriteString(strconv.Itoa(a))
-			case string:	os.Stdout.WriteString(a)
+		case Stringer:
+			os.Stdout.WriteString(a.String())
+		case int:
+			os.Stdout.WriteString(strconv.Itoa(a))
+		case string:
+			os.Stdout.WriteString(a)
 		// more types
-			default:		os.Stdout.WriteString("???")
+		default:
+			os.Stdout.WriteString("???")
 		}
 	}
 }
@@ -40,4 +46,5 @@ func print(args ...interface{}) {
 func main() {
 	print(Day(1), "was", Celsius(18.36)) // Tuesday was 18.4 °C
 }
+
 // Tuesday was 18.4 °C

eBook/examples/chapter_11/reflect1.go

@@ -20,6 +20,7 @@ func main() {
 	y := v.Interface().(float64)
 	fmt.Println(y)
 }
+
 /* output:
 type: float64
 value: <float64 Value>

eBook/examples/chapter_11/reflect2.go

@@ -22,6 +22,7 @@ func main() {
 	fmt.Println(v.Interface())
 	fmt.Println(v)
 }
+
 /* Output:
 settability of v: false
 type of v: *float64

eBook/examples/chapter_11/reflect_struct.go

@@ -15,7 +15,7 @@ func (n NotknownType) String() string {
 }
 
 // variable to investigate:
-var secret interface {} = NotknownType{"Ada", "Go", "Oberon"}
+var secret interface{} = NotknownType{"Ada", "Go", "Oberon"}
 
 func main() {
 	value := reflect.ValueOf(secret) // <main.NotknownType Value>
@@ -27,7 +27,7 @@ func main() {
 	fmt.Println(knd)
 
 	// iterate through the fields of the struct:
-	for i:= 0; i < value.NumField(); i++ {
+	for i := 0; i < value.NumField(); i++ {
 		fmt.Printf("Field %d: %v\n", i, value.Field(i))
 		// error: panic: reflect.Value.SetString using value obtained using unexported field
 		//value.Field(i).SetString("C#")
@@ -37,6 +37,7 @@ func main() {
 	results := value.Method(0).Call(nil)
 	fmt.Println(results) // [Ada - Go - Oberon]
 }
+
 /* Output:
 main.NotknownType
 struct

eBook/examples/chapter_11/reflect_struct2.go

@@ -24,6 +24,7 @@ func main() {
 	s.Field(1).SetString("Sunset Strip")
 	fmt.Println("t is now", t)
 }
+
 /* Output:
 0: A int = 23
 1: B string = skidoo

eBook/examples/chapter_11/sort/sort.go

@@ -39,11 +39,13 @@ func (p IntArray) Less(i, j int) bool { return p[i] < p[j] }
 func (p IntArray) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 
 type Float64Array []float64
+
 func (p Float64Array) Len() int           { return len(p) }
 func (p Float64Array) Less(i, j int) bool { return p[i] < p[j] }
 func (p Float64Array) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 
 type StringArray []string
+
 func (p StringArray) Len() int           { return len(p) }
 func (p StringArray) Less(i, j int) bool { return p[i] < p[j] }
 func (p StringArray) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }

eBook/examples/chapter_11/sortmain.go

@@ -6,8 +6,8 @@
 package main
 
 import (
-     	"fmt"
 	"./sort"
+	"fmt"
 )
 
 // sorting of slice of integers
@@ -23,7 +23,7 @@ func ints() {
 
 // sorting of slice of strings
 func strings() {
-    	data := []string{"monday", "friday", "tuesday", "wednesday", "sunday","thursday", "", "saturday"}
+	data := []string{"monday", "friday", "tuesday", "wednesday", "sunday", "thursday", "", "saturday"}
 	a := sort.StringArray(data)
 	sort.Sort(a)
 	if !sort.IsSorted(a) {
@@ -68,7 +68,6 @@ func days() {
 	fmt.Printf("\n")
 }
 
-    	
 func main() {
 	ints()
 	strings()

eBook/examples/chapter_11/static.go

@@ -2,11 +2,11 @@
 package main
 
 import (
-	"io"
-	"os"
 	"bufio"
 	"bytes"
 	"fmt"
+	"io"
+	"os"
 )
 
 var r io.Reader

eBook/examples/chapter_11/tideland-cgl.googlecode.com/hg/cgl.go

@@ -43,8 +43,8 @@ package cgl
 import (
 	"bytes"
 	"crypto/rand"
-	"fmt"
 	"encoding/hex"
+	"fmt"
 	"io"
 	"log"
 	"reflect"

eBook/examples/chapter_12/cat.go

@@ -1,11 +1,11 @@
 package main
 
 import (
-	"os"
-	"io"
-	"fmt"
 	"bufio"
 	"flag"
+	"fmt"
+	"io"
+	"os"
 )
 
 func cat(r *bufio.Reader) {
@@ -33,4 +33,3 @@ func main() {
 		cat(bufio.NewReader(f))
 	}
 }
-

eBook/examples/chapter_12/echo.go

@@ -1,8 +1,8 @@
 package main
 
 import (
-	"os"
 	"flag" // command line option parser
+	"os"
 )
 
 var NewLine = flag.Bool("n", false, "print newline") // echo -n flag, of type *bool

eBook/examples/chapter_12/fileoutput.go

@@ -1,12 +1,12 @@
 package main
 
 import (
-	"os"
 	"bufio"
 	"fmt"
+	"os"
 )
 
-func main () {
+func main() {
 	// var outputWriter *bufio.Writer
 	// var outputFile *os.File
 	// var outputError os.Error
@@ -21,7 +21,7 @@ func main () {
 	outputWriter := bufio.NewWriter(outputFile)
 	outputString := "hello world!\n"
 
-	for i:=0; i<10; i++ {
+	for i := 0; i < 10; i++ {
 		outputWriter.WriteString(outputString)
 	}
 	outputWriter.Flush()

eBook/examples/chapter_12/gob1.go

@@ -3,8 +3,8 @@ package main
 
 import (
 	"bytes"
-	"fmt"
 	"encoding/gob"
+	"fmt"
 	"log"
 )
 
@@ -38,4 +38,5 @@ func main() {
 	}
 	fmt.Printf("%q: {%d,%d}\n", q.Name, *q.X, *q.Y)
 }
+
 // Output:   "Pythagoras": {3,4}

eBook/examples/chapter_12/gob2.go

@@ -23,9 +23,9 @@ type VCard struct {
 var content string
 
 func main() {
-	pa := &Address{"private", "Aartselaar","Belgium"}
+	pa := &Address{"private", "Aartselaar", "Belgium"}
 	wa := &Address{"work", "Boom", "Belgium"}
-	vc := VCard{"Jan", "Kersschot", []*Address{pa,wa}, "none"}
+	vc := VCard{"Jan", "Kersschot", []*Address{pa, wa}, "none"}
 	// fmt.Printf("%v: \n", vc) // {Jan Kersschot [0x126d2b80 0x126d2be0] none}:
 	// using an encoder:
 	file, _ := os.OpenFile("vcard.gob", os.O_CREATE|os.O_WRONLY, 0666)
@@ -36,4 +36,3 @@ func main() {
 		log.Println("Error in encoding gob")
 	}
 }
-

eBook/examples/chapter_12/gzipped.go

@@ -2,10 +2,10 @@
 package main
 
 import (
-	"fmt"
 	"bufio"
-	"os"
 	"compress/gzip"
+	"fmt"
+	"os"
 )
 
 func main() {

eBook/examples/chapter_12/hash_sha1.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-	"fmt"
 	"crypto/sha1"
+	"fmt"
 	"io"
 	"log"
 )
@@ -18,12 +18,13 @@ func main() {
 	hasher.Reset()
 	data := []byte("We shall overcome!")
 	n, err := hasher.Write(data)
-	if n!=len(data) || err!=nil {
+	if n != len(data) || err != nil {
 		log.Printf("Hash write error: %v / %v", n, err)
 	}
 	checksum := hasher.Sum(b)
 	fmt.Printf("Result: %x\n", checksum)
 }
+
 /* Output:
 Result: a94a8fe5ccb19ba61c4c0873d391e987982fbbd3
 Result: [169 74 143 229 204 177 155 166 28 76 8 115 211 145 233 135 152 47 187 211]

eBook/examples/chapter_12/json.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-	"fmt"
 	"encoding/json"
+	"fmt"
 	"log"
 	"os"
 )
@@ -22,9 +22,9 @@ type VCard struct {
 }
 
 func main() {
-	pa := &Address{"private", "Aartselaar","Belgium"}
+	pa := &Address{"private", "Aartselaar", "Belgium"}
 	wa := &Address{"work", "Boom", "Belgium"}
-	vc := VCard{"Jan", "Kersschot", []*Address{pa,wa}, "none"}
+	vc := VCard{"Jan", "Kersschot", []*Address{pa, wa}, "none"}
 	// fmt.Printf("%v: \n", vc) // {Jan Kersschot [0x126d2b80 0x126d2be0] none}:
 	// JSON format:
 	js, _ := json.Marshal(vc)

eBook/examples/chapter_12/json_xml_case.go

@@ -32,6 +32,7 @@ func main() {
 	fmt.Printf("From XML: %#v\n", tx)
 
 }
+
 /* Output with
 type thing struct {
 	Field1 int

eBook/examples/chapter_12/read_file2.go

@@ -4,8 +4,8 @@ package main
 import (
 	"fmt"
 	"os"
-//	"io/ioutil"
-//	"strings"
+	//	"io/ioutil"
+	//	"strings"
 )
 
 func main() {
@@ -31,6 +31,7 @@ func main() {
 	fmt.Println(col2)
 	fmt.Println(col3)
 }
+
 /* Output:
 [ABC FUNC GO]
 [40 56 45]

eBook/examples/chapter_12/read_files.go

@@ -21,9 +21,7 @@ func main() {
 			break
 		}
 		r := bufio.NewReader(fin)
-		for line, _, err := r.ReadLine(); 
-		    err != io.EOF; 
-			line, _, err =	r.ReadLine() {
+		for line, _, err := r.ReadLine(); err != io.EOF; line, _, err = r.ReadLine() {
 			fmt.Printf("Lines: %v (error %v)\n", string(line), err)
 		}
 	}

eBook/examples/chapter_12/readinput2.go

@@ -2,14 +2,14 @@
 package main
 
 import (
-	"fmt"
 	"bufio"
+	"fmt"
 	"os"
 )
 
 var inputReader *bufio.Reader
-	var input string
-	var err error
+var input string
+var err error
 
 func main() {
 	inputReader = bufio.NewReader(os.Stdin) // reader for input

eBook/examples/chapter_12/switch_input.go

@@ -1,9 +1,9 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"os"
-	"bufio"
 )
 
 func main() {
@@ -19,23 +19,33 @@ func main() {
 	fmt.Printf("Your name is %s", input)
 	// For Unix: test with delimiter "\n", for Windows: test with "\r\n"
 	switch input {
-			case "Philip\r\n":	fmt.Println("Welcome Philip!")
-			case "Chris\r\n":	fmt.Println("Welcome Chris!")
-			case "Ivo\r\n":	    fmt.Println("Welcome Ivo!")
-			default: fmt.Printf("You are not welcome here! Goodbye!")
+	case "Philip\r\n":
+		fmt.Println("Welcome Philip!")
+	case "Chris\r\n":
+		fmt.Println("Welcome Chris!")
+	case "Ivo\r\n":
+		fmt.Println("Welcome Ivo!")
+	default:
+		fmt.Printf("You are not welcome here! Goodbye!")
 	}
 
 	// version 2:
 	switch input {
-		    case "Philip\r\n":	fallthrough
-		    case "Ivo\r\n":	    fallthrough
-		    case "Chris\r\n":	fmt.Printf("Welcome %s\n", input)
-		    default: fmt.Printf("You are not welcome here! Goodbye!\n")
+	case "Philip\r\n":
+		fallthrough
+	case "Ivo\r\n":
+		fallthrough
+	case "Chris\r\n":
+		fmt.Printf("Welcome %s\n", input)
+	default:
+		fmt.Printf("You are not welcome here! Goodbye!\n")
 	}
 
 	// version 3:
 	switch input {
-	    	case "Philip\r\n", "Ivo\r\n":	fmt.Printf("Welcome %s\n", input)
-	    	default: fmt.Printf("You are not welcome here! Goodbye!\n")
+	case "Philip\r\n", "Ivo\r\n":
+		fmt.Printf("Welcome %s\n", input)
+	default:
+		fmt.Printf("You are not welcome here! Goodbye!\n")
 	}
 }

eBook/examples/chapter_12/xml.go

@@ -2,9 +2,9 @@
 package main
 
 import (
+	"encoding/xml"
 	"fmt"
 	"strings"
-	"encoding/xml"
 )
 
 var t, token xml.Token
@@ -30,13 +30,14 @@ func main() {
 			fmt.Println("End of token")
 		case xml.CharData:
 			content := string([]byte(token))
-				fmt.Printf("This is the content: %v\n", content )
+			fmt.Printf("This is the content: %v\n", content)
 			// ...
 		default:
 			// ...
 		}
 	}
 }
+
 /* Output:
 Token name: Person
 Token name: FirstName

eBook/examples/chapter_13/errors.go

@@ -11,4 +11,5 @@ var errNotFound error = errors.New("Not found error")
 func main() {
 	fmt.Printf("error: %v", errNotFound)
 }
+
 // error: Not found error

eBook/examples/chapter_13/even/even_main/even_main.go

@@ -2,12 +2,12 @@
 package main
 
 import (
-	"fmt"
 	"even/even"
+	"fmt"
 )
 
 func main() {
-	for i:=0; i<=100; i++ {
+	for i := 0; i <= 100; i++ {
 		fmt.Printf("Is the integer %d even? %v\n", i, even.Even(i))
 	}
 }

eBook/examples/chapter_13/exec.go

@@ -1,15 +1,16 @@
 // exec.go
 package main
+
 import (
 	"fmt"
-    "os/exec" 
 	"os"
+	"os/exec"
 )
 
 func main() {
-// 1) os.StartProcess //
-/*********************/
-/* Linux: */
+	// 1) os.StartProcess //
+	/*********************/
+	/* Linux: */
 	env := os.Environ()
 	procAttr := &os.ProcAttr{
 		Env: env,
@@ -33,20 +34,20 @@ func main() {
 		os.Exit(1)
 	}
 	fmt.Printf("The process id is %v", pid)
-/* Output 1st:
-The process id is &{2054 0}total 2056
--rwxr-xr-x 1 ivo ivo 1157555 2011-07-04 16:48 Mieken_exec
--rw-r--r-- 1 ivo ivo    2124 2011-07-04 16:48 Mieken_exec.go
--rw-r--r-- 1 ivo ivo   18528 2011-07-04 16:48 Mieken_exec_go_.6
--rwxr-xr-x 1 ivo ivo  913920 2011-06-03 16:13 panic.exe
--rw-r--r-- 1 ivo ivo     180 2011-04-11 20:39 panic.go
-*/
+	/* Output 1st:
+	   The process id is &{2054 0}total 2056
+	   -rwxr-xr-x 1 ivo ivo 1157555 2011-07-04 16:48 Mieken_exec
+	   -rw-r--r-- 1 ivo ivo    2124 2011-07-04 16:48 Mieken_exec.go
+	   -rw-r--r-- 1 ivo ivo   18528 2011-07-04 16:48 Mieken_exec_go_.6
+	   -rwxr-xr-x 1 ivo ivo  913920 2011-06-03 16:13 panic.exe
+	   -rw-r--r-- 1 ivo ivo     180 2011-04-11 20:39 panic.go
+	*/
 
-// 2) exec.Run //
-/***************/
-// Linux:  OK, but not for ls ?
-// cmd := exec.Command("ls", "-l")  // no error, but doesn't show anything ?
-// cmd := exec.Command("ls")  		// no error, but doesn't show anything ?
+	// 2) exec.Run //
+	/***************/
+	// Linux:  OK, but not for ls ?
+	// cmd := exec.Command("ls", "-l")  // no error, but doesn't show anything ?
+	// cmd := exec.Command("ls")  		// no error, but doesn't show anything ?
 	cmd := exec.Command("gedit") // this opens a gedit-window
 	err = cmd.Run()
 	if err != nil {
@@ -54,8 +55,7 @@ The process id is &{2054 0}total 2056
 		os.Exit(1)
 	}
 	fmt.Printf("The command is %v", cmd)
-// The command is &{/bin/ls [ls -l] []  <nil> <nil> <nil> 0xf840000210 <nil> true [0xf84000ea50 0xf84000e9f0 0xf84000e9c0] [0xf84000ea50 0xf84000e9f0 0xf84000e9c0] [] [] 0xf8400128c0}
+	// The command is &{/bin/ls [ls -l] []  <nil> <nil> <nil> 0xf840000210 <nil> true [0xf84000ea50 0xf84000e9f0 0xf84000e9c0] [0xf84000ea50 0xf84000e9f0 0xf84000e9c0] [] [] 0xf8400128c0}
 }
+
 // in Windows: uitvoering: Error fork/exec /bin/ls: The system cannot find the path specified. starting process!
-	
-

eBook/examples/chapter_13/panic_package.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-	"fmt"
 	"./parse/parse"
+	"fmt"
 )
 
 func main() {
@@ -25,6 +25,7 @@ func main() {
 		fmt.Println(nums)
 	}
 }
+
 /* Output:
 Parsing "1 2 3 4 5":
   [1 2 3 4 5]

eBook/examples/chapter_13/parse/parse.go

@@ -3,8 +3,8 @@ package parse
 
 import (
 	"fmt"
-	"strings"
 	"strconv"
+	"strings"
 )
 
 // A ParseError indicates an error in converting a word into an integer.

eBook/examples/chapter_14/benchmark_channels.go

@@ -18,7 +18,7 @@ func BenchmarkChannelSync(b *testing.B) {
 		}
 		close(ch)
 	}()
-	for _ = range ch {
+	for range ch {
 	}
 }
 
@@ -30,6 +30,6 @@ func BenchmarkChannelBuffered(b *testing.B) {
 		}
 		close(ch)
 	}()
-	for _ = range ch {
+	for range ch {
 	}
 }

eBook/examples/chapter_14/chaining.go

@@ -7,7 +7,7 @@ import (
 
 var ngoroutine = flag.Int("n", 100000, "how many goroutines")
 
-func f(left, right chan int) { left <- 1+<-right }
+func f(left, right chan int) { left <- 1 + <-right }
 
 func main() {
 	flag.Parse()

eBook/examples/chapter_14/channel_block.go

@@ -13,4 +13,3 @@ func pump(ch chan int) {
 		ch <- i
 	}
 }
-

eBook/examples/chapter_14/conc_access.go

@@ -47,6 +47,7 @@ func main() {
 	fmt.Println("Salary changed:")
 	fmt.Println(bs)
 }
+
 /* Output:
 Person - name is: Smith Bill - salary is: 2500.50
 Salary changed:

eBook/examples/chapter_14/general_lazy_evalution1.go

@@ -43,6 +43,7 @@ func BuildLazyIntEvaluator(evalFunc EvalFunc, initState Any) func() int {
 		return ef().(int)
 	}
 }
+
 /* Output:
 0th even: 0
 1th even: 2

eBook/examples/chapter_14/goroutine2.go

@@ -30,4 +30,5 @@ func getData(ch chan string) {
 		fmt.Printf("%s ", input)
 	}
 }
+
 // Washington Tripoli London Beijing Tokio

eBook/examples/chapter_14/goroutine3.go

@@ -26,4 +26,5 @@ func getData(ch chan string) {
 		fmt.Printf("%s ", input)
 	}
 }
+
 // Washington Tripoli London Beijing Tokio

eBook/examples/chapter_14/goroutine_select2.go

@@ -2,8 +2,8 @@ package main
 
 import (
 	"fmt"
-	"time"
 	"runtime"
+	"time"
 )
 
 func main() {
@@ -24,26 +24,24 @@ func main() {
 }
 
 func pump1(ch chan int) {
-	for i:=0; ; i++ {
-		ch <- i*2
+	for i := 0; ; i++ {
+		ch <- i * 2
 	}
 }
 
 func pump2(ch chan int) {
-	for i:=0; ; i++ {
-		ch <- i+5
+	for i := 0; ; i++ {
+		ch <- i + 5
 	}
 }
 
-func suck(ch1,ch2 chan int) {
+func suck(ch1, ch2 chan int) {
 	for i := 0; ; i++ {
 		select {
-			case v := <- ch1:
+		case v := <-ch1:
 			fmt.Printf("%d - Received on channel 1: %d\n", i, v)
-			case v := <- ch2:
+		case v := <-ch2:
 			fmt.Printf("%d - Received on channel 2: %d\n", i, v)
 		}
 	}
 }
-
-

eBook/examples/chapter_14/lazy_evaluation.go

@@ -8,14 +8,14 @@ import (
 var resume chan int
 
 func integers() chan int {
-    yield := make (chan int)
+	yield := make(chan int)
 	count := 0
-    go func () {
+	go func() {
 		for {
 			yield <- count
 			count++
 		}
-    } ()
+	}()
 	return yield
 }
 

eBook/examples/chapter_14/max_tasks.go

@@ -1,6 +1,7 @@
 package main
 
 const MAXREQS = 50
+
 var sem = make(chan int, MAXREQS)
 
 type Request struct {

eBook/examples/chapter_14/timer_goroutine.go

@@ -22,6 +22,7 @@ func main() {
 		}
 	}
 }
+
 /* Output:
     .
     .

eBook/examples/chapter_16/closures_goroutines.go

@@ -39,6 +39,7 @@ func main() {
 	}
 	time.Sleep(1e9)
 }
+
 /* Output:
 0 1 2 3 4
 4 4 4 4 4

eBook/examples/chapter_16/pointer_interface.go

@@ -9,10 +9,9 @@ type nexter interface {
 	next() byte
 }
 
-
 func nextFew1(n nexter, num int) []byte {
 	var b []byte
-	for i:=0; i < num; i++ {
+	for i := 0; i < num; i++ {
 		b[i] = n.next()
 	}
 	return b
@@ -20,7 +19,7 @@ func nextFew1(n nexter, num int) []byte {
 
 func nextFew2(n *nexter, num int) []byte {
 	var b []byte
-	for i:=0; i < num; i++ {
+	for i := 0; i < num; i++ {
 		b[i] = n.next() // compile error:  n.next undefined (type *nexter has no field or method next)
 	}
 	return b

eBook/examples/chapter_19/goto_v1/main.go

@@ -11,6 +11,7 @@ URL: <input type="text" name="url">
 <input type="submit" value="Add">
 </form>
 `
+
 var store = NewURLStore()
 
 func main() {
@@ -29,7 +30,6 @@ func Redirect(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, url, http.StatusFound)
 }
 
-
 func Add(w http.ResponseWriter, r *http.Request) {
 	url := r.FormValue("url")
 	if url == "" {

eBook/examples/chapter_19/goto_v2/main.go

@@ -23,7 +23,6 @@ func Redirect(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, url, http.StatusFound)
 }
 
-
 func Add(w http.ResponseWriter, r *http.Request) {
 	url := r.FormValue("url")
 	if url == "" {

eBook/examples/chapter_19/goto_v3/store.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-//	"bufio"
+	//	"bufio"
 	"encoding/gob"
 	"io"
 	"log"

eBook/examples/chapter_19/goto_v5/store.go

@@ -5,8 +5,8 @@ import (
 	"errors"
 	"io"
 	"log"
-	"os"
 	"net/rpc"
+	"os"
 	"sync"
 )
 

eBook/examples/chapter_2/hello_world1.go

@@ -4,4 +4,3 @@ package main
 func main() {
 	println("Hello", "world")
 }
-

eBook/examples/chapter_2/version.go

@@ -8,5 +8,6 @@ import (
 func main() {
 	fmt.Printf("%s", runtime.Version())
 }
+
 // Output:
 // go1.0.3 or go 1.1

eBook/examples/chapter_20/helloapp/hello/helloworld2_version3.go

@@ -24,6 +24,7 @@ const signTemplateHTML = `
   </body>
 </html>
 `
+
 var signTemplate = template.Must(template.New("sign").Parse(signTemplateHTML))
 
 func init() {
@@ -43,4 +44,3 @@ func sign(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, err.String(), http.StatusInternalServerError)
 	}
 }
-

eBook/examples/chapter_20/helloapp/hello/helloworld2_version4.go

@@ -28,6 +28,7 @@ const guestbookTemplateHTML = `
   </body>
 </html>
 `
+
 var guestbookTemplate = template.Must(template.New("book").Parse(guestbookTemplateHTML))
 
 type Greeting struct {

eBook/examples/chapter_20/helloworld.go

@@ -13,4 +13,3 @@ func init() {
 func handle(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, "<html><body>Hello, World! 세상아 안녕!! </body></html>")
 }
-

eBook/examples/chapter_4/casting.go

@@ -1,17 +1,19 @@
 package main
+
 import "fmt"
 
 func main() {
 	var n int16 = 34
 	var m int32
 
-// compiler error: cannot use n (type int16) as type int32 in assignment
+	// compiler error: cannot use n (type int16) as type int32 in assignment
 	//m = n
 	m = int32(n)
 
 	fmt.Printf("32 bit int is:  %d\n", m)
 	fmt.Printf("16 bit int is:  %d\n", n)
 }
+
 /* Output:
 32 bit int is:  34
 16 bit int is:  34

eBook/examples/chapter_4/char.go

@@ -14,6 +14,7 @@ func main() {
 	fmt.Printf("%X - %X - %X\n", ch, ch2, ch3)
 	fmt.Printf("%U - %U - %U", ch, ch2, ch3)
 }
+
 /* Ouput:
 65 - 946 - 1053236
 A - β - 􁈴

eBook/examples/chapter_4/function_calls_function.go

@@ -1,5 +1,7 @@
 package main
+
 var a string
+
 func main() {
 	a = "G"
 	print(a)

eBook/examples/chapter_4/global_scope.go

@@ -1,5 +1,7 @@
 package main
+
 var a = "G"
+
 func main() {
 	n()
 	m()

eBook/examples/chapter_4/local_scope.go

@@ -1,5 +1,7 @@
 package main
+
 var a = "G"
+
 func main() {
 	n()
 	m()

eBook/examples/chapter_4/presuffix.go

@@ -11,4 +11,5 @@ func main() {
 	fmt.Printf("T/F? Does the string \"%s\" have prefix %s? ", str, "Th")
 	fmt.Printf("%t\n", strings.HasPrefix(str, "Th"))
 }
+
 // Output: T/F? Does the string "This is an example of a string" have prefix Th? true

eBook/examples/chapter_4/random.go

@@ -22,6 +22,7 @@ func main() {
 		fmt.Printf("%2.2f / ", 100*rand.Float32())
 	}
 }
+
 /* Output:
 134020434 / 1597969999 / 1721070109 / 2068675587 / 1237770961 / 220031192 / 2031484958 / 583324308 / 958990240 / 413002649 / 6 / 7 / 2 / 1 / 0 /
 22.84 / 10.12 / 44.32 / 58.58 / 15.49 / 12.23 / 30.16 / 88.48 / 34.26 / 27.18 /

eBook/examples/chapter_4/strings_splitjoin.go

@@ -21,9 +21,10 @@ func main() {
 		fmt.Printf("%s - ", val)
 	}
 	fmt.Println()
-	str3 := strings.Join(sl2,";")
+	str3 := strings.Join(sl2, ";")
 	fmt.Printf("sl2 joined by ;: %s\n", str3)
 }
+
 /* Output:
 Splitted in slice: [The quick brown fox jumps over the lazy dog]
 The - quick - brown - fox - jumps - over - the - lazy - dog -

eBook/examples/chapter_4/testcrash.go

@@ -7,5 +7,6 @@ func main() {
 	*p = 0
 
 }
+
 // in Windows: stops only with: <exit code="-1073741819" msg="process crashed"/>
 // runtime error: invalid memory address or nil pointer dereference

eBook/examples/chapter_4/use_init.go

@@ -1,8 +1,8 @@
 package main
 
 import (
-	"fmt"
 	"./trans"
+	"fmt"
 )
 
 var twoPi = 2 * trans.Pi // decl computes twoPi

eBook/examples/chapter_4/user_init.go

@@ -1,9 +1,12 @@
 package main
+
 import (
-	"fmt"
 	"./trans"
+	"fmt"
 )
+
 var twoPi = 2 * trans.Pi
+
 func main() {
 	fmt.Printf("2*Pi = %g\n", twoPi) // 2*Pi = 6.283185307179586
 }

eBook/examples/chapter_5/for4.go

@@ -1,9 +1,9 @@
 package main
 
 func main() {
-	for i:=0; i<3; i++ {
-		for j:=0; j<10; j++ {
-			if j>5 {
+	for i := 0; i < 3; i++ {
+		for j := 0; j < 10; j++ {
+			if j > 5 {
 				break
 			}
 			print(j)

eBook/examples/chapter_5/for_string.go

@@ -6,15 +6,16 @@ import "fmt"
 func main() {
 	str := "Go is a beautiful language!"
 	fmt.Printf("The length of str is: %d\n", len(str))
-	for ix :=0; ix < len(str); ix++ {
+	for ix := 0; ix < len(str); ix++ {
 		fmt.Printf("Character on position %d is: %c \n", ix, str[ix])
 	}
 	str2 := "日本語"
 	fmt.Printf("The length of str2 is: %d\n", len(str2))
-	for ix :=0; ix < len(str2); ix++ {
+	for ix := 0; ix < len(str2); ix++ {
 		fmt.Printf("Character on position %d is: %c \n", ix, str2[ix])
 	}
 }
+
 /* Output:
 The length of str is: 27
 Character on position 0 is: G

eBook/examples/chapter_5/goto.go

@@ -1,11 +1,11 @@
 package main
 
 func main() {
-	i:=0
-	HERE:   
+	i := 0
+HERE:
 	print(i)
 	i++
-		if i==5 {
+	if i == 5 {
 		return
 	}
 	goto HERE

eBook/examples/chapter_5/goto2.go

@@ -7,7 +7,7 @@ func main() {
 	a := 1
 	goto TARGET // compile error
 	b := 9
-	TARGET:  
+TARGET:
 	b += a
 	fmt.Printf("a is %v *** b is %v", a, b)
 }

eBook/examples/chapter_5/range_string.go

@@ -20,6 +20,7 @@ func main() {
 		fmt.Printf("%-2d      %d      %U '%c' % X\n", index, rune, rune, rune, []byte(string(rune)))
 	}
 }
+
 /* Output:
 The length of str is: 27
 Character on position 0 is: G

eBook/examples/chapter_6/defer_dbconn.go

@@ -7,12 +7,12 @@ func main() {
 	doDBOperations()
 }
 
-func connectToDB () {
-    fmt.Println( "ok, connected to db" )
+func connectToDB() {
+	fmt.Println("ok, connected to db")
 }
 
-func disconnectFromDB () {
-    fmt.Println( "ok, disconnected from db" )
+func disconnectFromDB() {
+	fmt.Println("ok, disconnected from db")
 }
 
 func doDBOperations() {
@@ -25,6 +25,7 @@ func doDBOperations() {
 	return //terminate the program
 	// deferred function executed here just before actually returning, even if there is a return or abnormal termination before
 }
+
 /* Output:
 ok, connected to db
 Defering the database disconnect.
@@ -33,6 +34,3 @@ Oops! some crash or network error ...
 Returning from function here!
 ok, disconnected from db
 */
-
-
-

eBook/examples/chapter_6/defer_logvalues.go

@@ -16,4 +16,5 @@ func func1(s string) (n int, err error) {
 func main() {
 	func1("Go")
 }
+
 // Output: 2011/10/04 10:46:11 func1("Go") = 7, EOF

eBook/examples/chapter_6/fibonacci.go

@@ -8,7 +8,7 @@ import (
 func main() {
 	result := 0
 	start := time.Now()
-	for i:=0; i <= 25; i++ {
+	for i := 0; i <= 25; i++ {
 		result = fibonacci(i)
 		fmt.Printf("fibonacci(%d) is: %d\n", i, result)
 	}
@@ -25,6 +25,7 @@ func fibonacci(n int) (res int) {
 	}
 	return
 }
+
 /* Output:
 fibonacci(0) is: 1
 fibonacci(1) is: 1

eBook/examples/chapter_6/fibonacci_memoization.go

@@ -7,12 +7,13 @@ import (
 )
 
 const LIM = 41
+
 var fibs [LIM]uint64
 
 func main() {
 	var result uint64 = 0
 	start := time.Now()
-	for i:=0; i < LIM; i++ {
+	for i := 0; i < LIM; i++ {
 		result = fibonacci(i)
 		fmt.Printf("fibonacci(%d) is: %d\n", i, result)
 	}
@@ -35,6 +36,7 @@ func fibonacci(n int) (res uint64) {
 	fibs[n] = res
 	return
 }
+
 /*
 Output: LIM=40:
 normal (fibonacci.go): the calculation took this amount of time: 4.730270 s

eBook/examples/chapter_6/filter_factory.go

@@ -1,18 +1,19 @@
 // filter_factory.go
 package main
+
 import "fmt"
 
-type flt func (int) bool
+type flt func(int) bool
 type slice_split func([]int) ([]int, []int)
 
-func isOdd(integer int) bool{
+func isOdd(integer int) bool {
 	if integer%2 == 0 {
 		return false
 	}
 	return true
 }
 
-func isBiggerThan4(integer int) bool{
+func isBiggerThan4(integer int) bool {
 	if integer > 4 {
 		return true
 	}
@@ -20,9 +21,9 @@ func isBiggerThan4(integer int) bool{
 }
 
 func filter_factory(f flt) slice_split {
-    return func(s []int) (yes, no []int){
-        for _, val := range s{
-            if f(val){
+	return func(s []int) (yes, no []int) {
+		for _, val := range s {
+			if f(val) {
 				yes = append(yes, val)
 			} else {
 				no = append(no, val)
@@ -32,8 +33,8 @@ func filter_factory(f flt) slice_split {
 	}
 }
 
-func main(){
-    s := []int {1, 2, 3, 4, 5, 7}
+func main() {
+	s := []int{1, 2, 3, 4, 5, 7}
 	fmt.Println("s = ", s)
 	odd_even_function := filter_factory(isOdd)
 	odd, even := odd_even_function(s)
@@ -44,6 +45,7 @@ func main(){
 	fmt.Println("Bigger than 4: ", bigger)
 	fmt.Println("Smaller than or equal to 4: ", smaller)
 }
+
 /*
 s =  [1 2 3 4 5 7]
 odd =  [1 3 5 7]

eBook/examples/chapter_6/function_closure.go

@@ -4,8 +4,8 @@ import "fmt"
 
 func main() {
 	var f = Adder()
-	fmt.Print(f(1)," - ")
-	fmt.Print(f(20)," - ")
+	fmt.Print(f(1), " - ")
+	fmt.Print(f(20), " - ")
 	fmt.Print(f(300))
 }
 

eBook/examples/chapter_6/function_filter.go

@@ -1,5 +1,6 @@
 // function_filter.go
 package main
+
 import "fmt"
 
 type flt func(int) bool
@@ -33,14 +34,15 @@ func filter(sl []int, f flt) []int {
 	return res
 }
 
-func main(){
-    slice := []int {1, 2, 3, 4, 5, 7}
+func main() {
+	slice := []int{1, 2, 3, 4, 5, 7}
 	fmt.Println("slice = ", slice)
 	odd := filter(slice, isOdd)
 	fmt.Println("Odd elements of slice are: ", odd)
 	even := filter(slice, isEven)
 	fmt.Println("Even elements of slice are: ", even)
 }
+
 /*
 slice =  [1 2 3 4 5 7]
 Odd elements of slice are:  [1 3 5 7]

eBook/examples/chapter_6/function_literal.go

@@ -1,4 +1,5 @@
 package main
+
 import "fmt"
 
 func main() {

eBook/examples/chapter_6/function_parameter.go

@@ -9,12 +9,12 @@ func main() {
 	callback(1, Add)
 }
 
-func Add(a,b int) {
-	fmt.Printf("The sum of %d and %d is: %d\n", a, b, a + b)
+func Add(a, b int) {
+	fmt.Printf("The sum of %d and %d is: %d\n", a, b, a+b)
 }
 
-
 func callback(y int, f func(int, int)) {
 	f(y, 2) // this becomes Add(1, 2)
 }
+
 // Output:  The sum of 1 and 2 is: 3

eBook/examples/chapter_6/function_return.go

@@ -1,4 +1,5 @@
 package main
+
 import "fmt"
 
 func main() {
@@ -10,17 +11,18 @@ func main() {
 	fmt.Printf("The result is: %v\n", TwoAdder(2))
 }
 
-func Add2() (func(b int) int) {
+func Add2() func(b int) int {
 	return func(b int) int {
 		return b + 2
 	}
 }
 
-func Adder(a int) (func(b int) int) {
+func Adder(a int) func(b int) int {
 	return func(b int) int {
 		return a + b
 	}
 }
+
 /* Output:
 Call Add2 for 2 gives: 4
 The result is: 4

eBook/examples/chapter_6/mut_recurs.go

@@ -12,16 +12,22 @@ func main() {
 }
 
 func even(nr int) bool {
-    if nr == 0 {return true}
-    return odd(RevSign(nr)-1)
+	if nr == 0 {
+		return true
+	}
+	return odd(RevSign(nr) - 1)
 }
 
 func odd(nr int) bool {
-    if nr == 0 {return false}
-    return even(RevSign(nr)-1)
+	if nr == 0 {
+		return false
+	}
+	return even(RevSign(nr) - 1)
 }
 
 func RevSign(nr int) int {
-	if nr < 0 {return -nr}
+	if nr < 0 {
+		return -nr
+	}
 	return nr
 }

eBook/examples/chapter_6/return_defer.go

@@ -15,4 +15,5 @@ func f() (ret int) {
 func main() {
 	fmt.Println(f())
 }
+
 // Output: 2

eBook/examples/chapter_6/varnumpar.go

@@ -5,13 +5,13 @@ import "fmt"
 func main() {
 	x := Min(1, 3, 2, 0)
 	fmt.Printf("The minimum is: %d\n", x)
-	arr := []int{7,9,3,5,1}
+	arr := []int{7, 9, 3, 5, 1}
 	x = Min(arr...)
 	fmt.Printf("The minimum in the array arr is: %d", x)
 }
 
 func Min(a ...int) int {
-  if len(a)==0 {
+	if len(a) == 0 {
 		return 0
 	}
 	min := a[0]
@@ -22,6 +22,7 @@ func Min(a ...int) int {
 	}
 	return min
 }
+
 /*
 The minimum is: 0
 The minimum in the array arr is: 1

eBook/examples/chapter_7/array_sum.go

@@ -14,4 +14,5 @@ func Sum(a *[3]float64) (sum float64) {
 	}
 	return
 }
+
 // Output: The sum of the array is: 24.600000

eBook/examples/chapter_7/copy_append_slice.go

@@ -3,14 +3,14 @@ package main
 import "fmt"
 
 func main() {
-	sl_from := []int{1,2,3}
-	sl_to := make([]int,10)
+	sl_from := []int{1, 2, 3}
+	sl_to := make([]int, 10)
 
 	n := copy(sl_to, sl_from)
 	fmt.Println(sl_to)                    // output: [1 2 3 0 0 0 0 0 0 0]
 	fmt.Printf("Copied %d elements\n", n) // n == 3
 
-	sl3 := []int{1,2,3}
+	sl3 := []int{1, 2, 3}
 	sl3 = append(sl3, 4, 5, 6)
 	fmt.Println(sl3) // output: [1 2 3 4 5 6]
 }