Merge pull request #323 from appleboy/patch-9

fix: coding style and file format for all example.

eBook/examples/chapter_10/embed_func1.go

@@ -9,8 +9,8 @@ type Log struct {
 }
 
 type Customer struct {
-    Name	string
-    log 	*Log
+	Name string
+	log  *Log
 }
 
 func main() {
@@ -35,8 +35,9 @@ func (l *Log) String() string {
 }
 
 func (c *Customer) Log() *Log {
-    return c.log
+	return c.log
 }
+
 /* Output:
 1 - Yes we can!
 2 - After me the world will be a better place!

eBook/examples/chapter_10/embed_func2.go

@@ -9,8 +9,8 @@ type Log struct {
 }
 
 type Customer struct {
-    Name	string
-    Log
+	Name string
+	Log
 }
 
 func main() {

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/method2.go

@@ -12,5 +12,5 @@ func (v IntVector) Sum() (s int) {
 }
 
 func main() {
-	fmt.Println(IntVector{1, 2, 3}.Sum())  // Output: 6
+	fmt.Println(IntVector{1, 2, 3}.Sum()) // Output: 6
 }

eBook/examples/chapter_10/method_on_time.go

@@ -3,22 +3,23 @@ package main
 
 import (
 	"fmt"
-    "time"
+	"time"
 )
 
 type myTime struct {
-    time.Time //anonymous field
+	time.Time //anonymous field
 }
 
 func (t myTime) first3Chars() string {
-    return t.Time.String()[0:3]
+	return t.Time.String()[0:3]
 }
 
 func main() {
-    m := myTime{time.Now()} 
-    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
+	m := myTime{time.Now()}
+	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

@@ -6,17 +6,18 @@ import (
 )
 
 type List []int
-func (l List) Len() int { return len(l) }
+
+func (l List) Len() int        { return len(l) }
 func (l *List) Append(val int) { *l = append(*l, val) }
 
 func main() {
-	  // A bare value
-        var lst List
-        lst.Append(1)
-        fmt.Printf("%v (len: %d)\n", lst, lst.Len()) // [1] (len: 1)
+	// A bare value
+	var lst List
+	lst.Append(1)
+	fmt.Printf("%v (len: %d)\n", lst, lst.Len()) // [1] (len: 1)
 
-        // A pointer value
-        plst := new(List)
-        plst.Append(2)
-        fmt.Printf("%v (len: %d)\n", plst, lst.Len()) // &[2] (len: 1)
+	// A pointer value
+	plst := new(List)
+	plst.Append(2)
+	fmt.Printf("%v (len: %d)\n", plst, lst.Len()) // &[2] (len: 1)
 }

eBook/examples/chapter_10/mult_inheritance.go

@@ -3,30 +3,31 @@ package main
 
 import "fmt"
 
-type Camera struct { } 
+type Camera struct{}
 
 func (c *Camera) TakeAPicture() string {
-    return "Click"
+	return "Click"
 }
 
-type Phone struct { } 
+type Phone struct{}
 
-func (p *Phone ) Call() string { 
-    return "Ring Ring"
+func (p *Phone) Call() string {
+	return "Ring Ring"
 }
 
 // multiple inheritance
 type CameraPhone struct {
-    Camera 
-    Phone  
+	Camera
+	Phone
 }
 
 func main() {
-    cp := new(CameraPhone)  
-    fmt.Println("Our new CameraPhone exhibits multiple behaviors ...")
-    fmt.Println("It exhibits behavior of a Camera: ", cp.TakeAPicture())     
+	cp := new(CameraPhone)
+	fmt.Println("Our new CameraPhone exhibits multiple behaviors ...")
+	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

@@ -6,34 +6,35 @@ import (
 )
 
 type Person struct {
-	firstName	string
-	lastName	string
+	firstName string
+	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

@@ -1,8 +1,8 @@
 package person
 
 type Person struct {
-	firstName	string
-	lastName	string
+	firstName string
+	lastName  string
 }
 
 func (p *Person) FirstName() string {
@@ -10,8 +10,5 @@ func (p *Person) FirstName() string {
 }
 
 func (p *Person) SetFirstName(newName string) {
-	 p.firstName = newName
+	p.firstName = newName
 }
-
-
-

eBook/examples/chapter_10/pointer_value.go

@@ -6,22 +6,23 @@ import (
 )
 
 type B struct {
-	thing  int
+	thing int
 }
 
-func (b *B) change() {  b.thing = 1 }
+func (b *B) change() { b.thing = 1 }
 
 func (b B) write() string { return fmt.Sprint(b) }
 
 func main() {
-	  var b1 B  // b1 is value
-      b1.change()
-      fmt.Println(b1.write())
+	var b1 B // b1 is value
+	b1.change()
+	fmt.Println(b1.write())
 
-      b2 := new(B)  // b2 is pointer
-      b2.change()
-      fmt.Println(b2.write())
+	b2 := new(B) // b2 is pointer
+	b2.change()
+	fmt.Println(b2.write())
 }
+
 /* Output:
 {1}
 {1}

eBook/examples/chapter_10/struct_conversions.go

@@ -6,10 +6,10 @@ import (
 )
 
 type number struct {
-	f	float32
+	f float32
 }
 
-type nr number   // alias type
+type nr number // alias type
 
 func main() {
 	a := number{5.0}
@@ -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

@@ -5,16 +5,16 @@ import (
 	"reflect"
 )
 
-type TagType struct {  //  tags
-	field1	bool	"An important answer"
-	field2	string	"The name of the thing"
-	field3	int     "How much there are"
+type TagType struct { //  tags
+	field1 bool   "An important answer"
+	field2 string "The name of the thing"
+	field3 int    "How much there are"
 }
 
 func main() {
 	tt := TagType{true, "Barak Obama", 1}
-	for i:= 0; i < 3; i++ {
-			refTag(tt, 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/structs_anonymous_fields.go

@@ -3,13 +3,13 @@ package main
 import "fmt"
 
 type innerS struct {
-	in1  int
-	in2  int
+	in1 int
+	in2 int
 }
 
 type outerS struct {
-	b   int
-	c   float32
+	b      int
+	c      float32
 	int    // anonymous field
 	innerS // anonymous field
 }

eBook/examples/chapter_10/structs_fields.go

@@ -3,9 +3,9 @@ package main
 import "fmt"
 
 type struct1 struct {
-	i1   int
-	f1   float32
-	str  string
+	i1  int
+	f1  float32
+	str string
 }
 
 func main() {

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

@@ -5,26 +5,25 @@ import (
 	"fmt"
 )
 
-
 type Any interface{}
 type Car struct {
-	Model   	string
-	Manufacturer	string
-	BuildYear	int
-    // ...
+	Model        string
+	Manufacturer string
+	BuildYear    int
+	// ...
 }
 type Cars []*Car
 
 func main() {
 	// make some cars:
-	ford := &Car{"Fiesta","Ford", 2008}
-	bmw  := &Car{"XL 450", "BMW", 2011}
+	ford := &Car{"Fiesta", "Ford", 2008}
+	bmw := &Car{"XL 450", "BMW", 2011}
 	merc := &Car{"D600", "Mercedes", 2009}
 	bmw2 := &Car{"X 800", "BMW", 2008}
 	// query:
 	allCars := Cars([]*Car{ford, bmw, merc, bmw2})
 	allNewBMWs := allCars.FindAll(func(car *Car) bool {
-      return (car.Manufacturer == "BMW") && (car.BuildYear > 2010)
+		return (car.Manufacturer == "BMW") && (car.BuildYear > 2010)
 	})
 	fmt.Println("AllCars: ", allCars)
 	fmt.Println("New BMWs: ", allNewBMWs)
@@ -33,58 +32,58 @@ func main() {
 	sortedAppender, sortedCars := MakeSortedAppender(manufacturers)
 	allCars.Process(sortedAppender)
 	fmt.Println("Map sortedCars: ", sortedCars)
-    BMWCount := len(sortedCars["BMW"])
+	BMWCount := len(sortedCars["BMW"])
 	fmt.Println("We have ", BMWCount, " BMWs")
 }
 
 // Process all cars with the given function f:
 func (cs Cars) Process(f func(car *Car)) {
-     for _, c := range cs {
-         f(c)
-     }
+	for _, c := range cs {
+		f(c)
+	}
 }
 
 // Find all cars matching a given criteria.
 func (cs Cars) FindAll(f func(car *Car) bool) Cars {
-    cars := make([]*Car, 0)
+	cars := make([]*Car, 0)
 
-    cs.Process(func(c *Car) {
-        if f(c) {
-            cars = append(cars, c)
-        }
-    })
-    return cars
+	cs.Process(func(c *Car) {
+		if f(c) {
+			cars = append(cars, c)
+		}
+	})
+	return cars
 }
 
 // Process cars and create new data.
 func (cs Cars) Map(f func(car *Car) Any) []Any {
-       result := make([]Any, 0)
-       ix := 0
-       cs.Process(func(c *Car) {
-           result[ix] = f(c)
-           ix++
-       })
-       return result
+	result := make([]Any, 0)
+	ix := 0
+	cs.Process(func(c *Car) {
+		result[ix] = f(c)
+		ix++
+	})
+	return result
 }
 
 func MakeSortedAppender(manufacturers []string) (func(car *Car), map[string]Cars) {
-     // Prepare maps of sorted cars.
-       sortedCars := make(map[string]Cars)
+	// Prepare maps of sorted cars.
+	sortedCars := make(map[string]Cars)
 
-       for _, m := range manufacturers {
-           sortedCars[m] = make([]*Car, 0)
-       }
-       sortedCars["Default"] = make([]*Car, 0)
+	for _, m := range manufacturers {
+		sortedCars[m] = make([]*Car, 0)
+	}
+	sortedCars["Default"] = make([]*Car, 0)
 
-       // Prepare appender function:
-       appender := func(c *Car) {
-           if _, ok := sortedCars[c.Manufacturer]; ok {
-               sortedCars[c.Manufacturer] = append(sortedCars[c.Manufacturer], c)
-           } else {
-               sortedCars["Default"] = append(sortedCars["Default"], c)
-           }
-       }
-       return appender, sortedCars
+	// Prepare appender function:
+	appender := func(c *Car) {
+		if _, ok := sortedCars[c.Manufacturer]; ok {
+			sortedCars[c.Manufacturer] = append(sortedCars[c.Manufacturer], c)
+		} else {
+			sortedCars["Default"] = append(sortedCars["Default"], c)
+		}
+	}
+	return appender, sortedCars
 }
 
 /* Output:

eBook/examples/chapter_11/duck_dance.go

@@ -22,7 +22,7 @@ func (b *Bird) Quack() {
 	fmt.Println("I am quacking!")
 }
 
-func (b *Bird) Walk()  {
+func (b *Bird) Walk() {
 	fmt.Println("I am walking!")
 }
 

eBook/examples/chapter_11/empty_interface.go

@@ -7,7 +7,7 @@ var str = "ABC"
 
 type Person struct {
 	name string
-	age	int
+	age  int
 }
 
 type Any interface{}
@@ -24,15 +24,15 @@ func main() {
 	val = pers1
 	fmt.Printf("val has the value: %v\n", val)
 	switch t := val.(type) {
-		case int:
-			fmt.Printf("Type int %T\n", t)
-		case string:
-			fmt.Printf("Type string %T\n", t)
-		case bool:
-   			fmt.Printf("Type boolean %T\n", t)
-		case *Person:
-   			fmt.Printf("Type pointer to Person %T\n", *t)
-		default:
-   			fmt.Printf("Unexpected type %T", t)
+	case int:
+		fmt.Printf("Type int %T\n", t)
+	case string:
+		fmt.Printf("Type string %T\n", t)
+	case bool:
+		fmt.Printf("Type boolean %T\n", t)
+	case *Person:
+		fmt.Printf("Type pointer to Person %T\n", *t)
+	default:
+		fmt.Printf("Unexpected type %T", t)
 	}
 }

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

@@ -16,23 +16,24 @@ func (sq *Square) Area() float32 {
 }
 
 type Rectangle struct {
-   length, width float32
+	length, width float32
 }
 
 func (r Rectangle) Area() float32 {
-   return r.length * r.width
+	return r.length * r.width
 }
 
 func main() {
-   r := Rectangle{5, 3} // Area() of Rectangle needs a value
-   q := &Square{5}      // Area() of Square needs a pointer
-   shapes := []Shaper{r, q}
-   fmt.Println("Looping through shapes for area ...")
-   for n, _ := range shapes {
-       fmt.Println("Shape details: ", shapes[n])
-       fmt.Println("Area of this shape is: ", shapes[n].Area())
-   }
+	r := Rectangle{5, 3} // Area() of Rectangle needs a value
+	q := &Square{5}      // Area() of Square needs a pointer
+	shapes := []Shaper{r, q}
+	fmt.Println("Looping through shapes for area ...")
+	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

@@ -6,43 +6,44 @@ import (
 )
 
 type List []int
-func (l List) Len() int { return len(l) }
+
+func (l List) Len() int        { return len(l) }
 func (l *List) Append(val int) { *l = append(*l, val) }
 
 type Appender interface {
-        Append(int)
+	Append(int)
 }
 
 func CountInto(a Appender, start, end int) {
-        for i := start; i <= end; i++ {
-                a.Append(i)
-        }
+	for i := start; i <= end; i++ {
+		a.Append(i)
+	}
 }
 
 type Lener interface {
-        Len() int
+	Len() int
 }
 
 func LongEnough(l Lener) bool {
-        return l.Len()*10 > 42
+	return l.Len()*10 > 42
 }
 
 func main() {
-		// A bare value
-        var lst List
-		// compiler error:
-		// cannot use lst (type List) as type Appender in function argument:
-		// List does not implement Appender (Append method requires pointer receiver)
-        // CountInto(lst, 1, 10) // INVALID: Append has a pointer receiver
+	// A bare value
+	var lst List
+	// compiler error:
+	// cannot use lst (type List) as type Appender in function argument:
+	// List does not implement Appender (Append method requires pointer receiver)
+	// CountInto(lst, 1, 10) // INVALID: Append has a pointer receiver
 
-        if LongEnough(lst) {  // VALID: Identical receiver type
-                fmt.Printf(" - lst is long enough")
-        }
+	if LongEnough(lst) { // VALID: Identical receiver type
+		fmt.Printf(" - lst is long enough")
+	}
 
-        // A pointer value
-        plst := new(List)
-        CountInto(plst, 1, 10) // VALID: Identical receiver type
-        if LongEnough(plst) {  // VALID: a *List can be dereferenced for the receiver
-                fmt.Printf(" - plst is long enough")  //  - plst is long enoug
-        }      
+	// A pointer value
+	plst := new(List)
+	CountInto(plst, 1, 10) // VALID: Identical receiver type
+	if LongEnough(plst) {  // VALID: a *List can be dereferenced for the receiver
+		fmt.Printf(" - plst is long enough") //  - plst is long enoug
+	}
 }

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

@@ -4,9 +4,9 @@ package main
 import "fmt"
 
 type Node struct {
-	le    *Node
-	data  interface{}
-	ri    *Node
+	le   *Node
+	data interface{}
+	ri   *Node
 }
 
 func NewNode(left, right *Node) *Node {
@@ -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
@@ -26,18 +26,25 @@ 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)
-			// more types
-			default:		os.Stdout.WriteString("???")
+		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("???")
 		}
 	}
 }
 
 func main() {
-	print(Day(1), "was", Celsius(18.36))  // Tuesday was 18.4 °C
+	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

@@ -7,7 +7,7 @@ import (
 )
 
 type NotknownType struct {
-	s1, s2, s3	string
+	s1, s2, s3 string
 }
 
 func (n NotknownType) String() string {
@@ -15,19 +15,19 @@ 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>
-	typ := reflect.TypeOf(secret)   // main.NotknownType
+	value := reflect.ValueOf(secret) // <main.NotknownType Value>
+	typ := reflect.TypeOf(secret)    // main.NotknownType
 	// alternative:
 	//typ := value.Type()  // main.NotknownType
 	fmt.Println(typ)
-	knd := value.Kind()  // struct
+	knd := value.Kind() // struct
 	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#")
@@ -35,8 +35,9 @@ func main() {
 
 	// call the first method, which is String():
 	results := value.Method(0).Call(nil)
-	fmt.Println(results)  // [Ada - Go - Oberon]
+	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

@@ -6,73 +6,72 @@
 package main
 
 import (
-     	"fmt"
-     	"./sort"
+	"./sort"
+	"fmt"
 )
 
 // sorting of slice of integers
 func ints() {
-    	data := []int{74, 59, 238, -784, 9845, 959, 905, 0, 0, 42, 7586, -5467984, 7586}
-    	a := sort.IntArray(data)  //conversion to type IntArray
-    	sort.Sort(a)
-    	if !sort.IsSorted(a) {
-    			panic("fail")
-    	}
-	    fmt.Printf("The sorted array is: %v\n", a)
+	data := []int{74, 59, 238, -784, 9845, 959, 905, 0, 0, 42, 7586, -5467984, 7586}
+	a := sort.IntArray(data) //conversion to type IntArray
+	sort.Sort(a)
+	if !sort.IsSorted(a) {
+		panic("fail")
+	}
+	fmt.Printf("The sorted array is: %v\n", a)
 }
 
 // sorting of slice of strings
 func strings() {
-    	data := []string{"monday", "friday", "tuesday", "wednesday", "sunday","thursday", "", "saturday"}
-    	a := sort.StringArray(data)
-    	sort.Sort(a)
-    	if !sort.IsSorted(a) {
-    			panic("fail")
-		}
-	    fmt.Printf("The sorted array is: %v\n", a)
+	data := []string{"monday", "friday", "tuesday", "wednesday", "sunday", "thursday", "", "saturday"}
+	a := sort.StringArray(data)
+	sort.Sort(a)
+	if !sort.IsSorted(a) {
+		panic("fail")
+	}
+	fmt.Printf("The sorted array is: %v\n", a)
 }
 
 // a type which describes a day of the week
 type day struct {
-    	num        int
-    	shortName  string
-    	longName   string
+	num       int
+	shortName string
+	longName  string
 }
 
 type dayArray struct {
-    	data []*day
+	data []*day
 }
 
-func (p *dayArray) Len() int            { return len(p.data) }
-func (p *dayArray) Less(i, j int) bool  { return p.data[i].num < p.data[j].num }
-func (p *dayArray) Swap(i, j int)       { p.data[i], p.data[j] = p.data[j], p.data[i] }
+func (p *dayArray) Len() int           { return len(p.data) }
+func (p *dayArray) Less(i, j int) bool { return p.data[i].num < p.data[j].num }
+func (p *dayArray) Swap(i, j int)      { p.data[i], p.data[j] = p.data[j], p.data[i] }
 
 // sorting of custom type day
 func days() {
-    	Sunday :=    day{0, "SUN", "Sunday"}
-    	Monday :=    day{1, "MON", "Monday"}
-    	Tuesday :=   day{2, "TUE", "Tuesday"}
-    	Wednesday := day{3, "WED", "Wednesday"}
-    	Thursday :=  day{4, "THU", "Thursday"}
-    	Friday :=    day{5, "FRI", "Friday"}
-    	Saturday :=  day{6, "SAT", "Saturday"}
-    	data := []*day{&Tuesday, &Thursday, &Wednesday, &Sunday, &Monday, &Friday, &Saturday}
-    	a := dayArray{data}
-    	sort.Sort(&a)
-    	if !sort.IsSorted(&a) {
-    			panic("fail")
-    	}
-    	for _, d := range data {
-    			fmt.Printf("%s ", d.longName)
-    	}
-    	fmt.Printf("\n")
+	Sunday := day{0, "SUN", "Sunday"}
+	Monday := day{1, "MON", "Monday"}
+	Tuesday := day{2, "TUE", "Tuesday"}
+	Wednesday := day{3, "WED", "Wednesday"}
+	Thursday := day{4, "THU", "Thursday"}
+	Friday := day{5, "FRI", "Friday"}
+	Saturday := day{6, "SAT", "Saturday"}
+	data := []*day{&Tuesday, &Thursday, &Wednesday, &Sunday, &Monday, &Friday, &Saturday}
+	a := dayArray{data}
+	sort.Sort(&a)
+	if !sort.IsSorted(&a) {
+		panic("fail")
+	}
+	for _, d := range data {
+		fmt.Printf("%s ", d.longName)
+	}
+	fmt.Printf("\n")
 }
 
-    	
 func main() {
-    ints()
-    strings()
-    days()
+	ints()
+	strings()
+	days()
 }
 
 /* Output:

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_11/type_interfaces.go

@@ -34,22 +34,22 @@ func main() {
 	}
 	// testing with switch:
 	switch t := areaIntf.(type) {
-		case *Square:
-			fmt.Printf("Type Square %T with value %v\n", t, t)
-		case *Circle:
-			fmt.Printf("Type Circle %T with value %v\n", t, t)
-		/* 
-		case bool:
-   			fmt.Printf("Type boolean %t\n", t)
-		case int:
-   			fmt.Printf("Type int %d\n", t)
-		case *bool:
-   			fmt.Printf("Type pointer to boolean %t\n", *t)
-		case *int:
-   			fmt.Printf("Type pointer to int %d\n", *t)
-		*/
-		default:
-   			fmt.Printf("Unexpected type %T", t)
+	case *Square:
+		fmt.Printf("Type Square %T with value %v\n", t, t)
+	case *Circle:
+		fmt.Printf("Type Circle %T with value %v\n", t, t)
+	/*
+				case bool:
+		   			fmt.Printf("Type boolean %t\n", t)
+				case int:
+		   			fmt.Printf("Type int %d\n", t)
+				case *bool:
+		   			fmt.Printf("Type pointer to boolean %t\n", *t)
+				case *int:
+		   			fmt.Printf("Type pointer to int %d\n", *t)
+	*/
+	default:
+		fmt.Printf("Unexpected type %T", t)
 	}
 }
 

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
@@ -19,7 +19,7 @@ func main() {
 	for i := 0; i < flag.NArg(); i++ {
 		if i > 0 {
 			s += " "
-			if *NewLine {  // -n is parsed, flag becomes true
+			if *NewLine { // -n is parsed, flag becomes true
 				s += Newline
 			}
 		}

eBook/examples/chapter_12/fileinput.go

@@ -16,8 +16,8 @@ func main() {
 	inputFile, inputError := os.Open("input.dat")
 	if inputError != nil {
 		fmt.Printf("An error occurred on opening the inputfile\n" +
-		           "Does the file exist?\n" + 
-			       "Have you got acces to it?\n")
+			"Does the file exist?\n" +
+			"Have you got acces to it?\n")
 		return // exit the function on error
 	}
 	defer inputFile.Close()

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"
 )
 
@@ -22,9 +22,9 @@ func main() {
 	// Initialize the encoder and decoder.  Normally enc and dec would be
 	// bound to network connections and the encoder and decoder would
 	// run in different processes.
-	var network bytes.Buffer   // Stand-in for a network connection      
+	var network bytes.Buffer        // Stand-in for a network connection
 	enc := gob.NewEncoder(&network) // Will write to network.
-	dec := gob.NewDecoder(&network)	// Will read from network.      
+	dec := gob.NewDecoder(&network) // Will read from network.
 	// Encode (send) the value.
 	err := enc.Encode(P{3, 4, 5, "Pythagoras"})
 	if err != nil {
@@ -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

@@ -8,24 +8,24 @@ import (
 )
 
 type Address struct {
-	Type             string
-	City             string
-	Country          string
+	Type    string
+	City    string
+	Country string
 }
 
 type VCard struct {
-	FirstName	string
-	LastName	string
-	Addresses	[]*Address
-	Remark		string
+	FirstName string
+	LastName  string
+	Addresses []*Address
+	Remark    string
 }
 
-var content	string
+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

@@ -2,29 +2,29 @@
 package main
 
 import (
-	"fmt"
 	"encoding/json"
+	"fmt"
 	"log"
 	"os"
 )
 
 type Address struct {
-	Type             string
-	City             string
-	Country          string
+	Type    string
+	City    string
+	Country string
 }
 
 type VCard struct {
-	FirstName	string
-	LastName	string
-	Addresses	[]*Address
-	Remark		string
+	FirstName string
+	LastName  string
+	Addresses []*Address
+	Remark    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}:
 	// 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

@@ -21,10 +21,8 @@ func main() {
 			break
 		}
 		r := bufio.NewReader(fin)
-		for line, _, err := r.ReadLine(); 
-		    err != io.EOF; 
-			line, _, err =	r.ReadLine() {
-				fmt.Printf("Lines: %v (error %v)\n", string(line), err)
+		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/readinput1.go

@@ -7,10 +7,10 @@ import (
 
 var (
 	firstName, lastName, s string
-	i int
-	f float32
-	input = "56.12 / 5212 / Go"
-	format = "%f / %d / %s"
+	i                      int
+	f                      float32
+	input                  = "56.12 / 5212 / Go"
+	format                 = "%f / %d / %s"
 )
 
 func main() {

eBook/examples/chapter_12/readinput2.go

@@ -2,17 +2,17 @@
 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
+	inputReader = bufio.NewReader(os.Stdin) // reader for input
 	fmt.Println("Please enter some input: ")
 	input, err = inputReader.ReadString('\n')
 

eBook/examples/chapter_12/switch_input.go

@@ -1,41 +1,51 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"os"
-	"bufio"
 )
 
 func main() {
-		inputReader := bufio.NewReader(os.Stdin)
-		fmt.Println("Please enter your name:")
-		input, err := inputReader.ReadString('\n')
+	inputReader := bufio.NewReader(os.Stdin)
+	fmt.Println("Please enter your name:")
+	input, err := inputReader.ReadString('\n')
 
-		if err != nil {
-			fmt.Println("There were errors reading, exiting program.")
-			return
-		}
+	if err != nil {
+		fmt.Println("There were errors reading, exiting program.")
+		return
+	}
 
-		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!")
-		}
+	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!")
+	}
 
-	 // 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")
-	    }
+	// 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")
+	}
 
 	// 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")
-	    }
+	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")
+	}
 }

eBook/examples/chapter_12/xml.go

@@ -2,13 +2,13 @@
 package main
 
 import (
+	"encoding/xml"
 	"fmt"
 	"strings"
-	"encoding/xml"
 )
 
-var t, token	xml.Token
-var	err			error
+var t, token xml.Token
+var err error
 
 func main() {
 	input := "<Person><FirstName>Laura</FirstName><LastName>Lynn</LastName></Person>"
@@ -17,26 +17,27 @@ func main() {
 
 	for t, err = p.Token(); err == nil; t, err = p.Token() {
 		switch token := t.(type) {
-			case xml.StartElement:
-				name := token.Name.Local
-				fmt.Printf("Token name: %s\n", name)
-				for _, attr := range token.Attr {
-					attrName := attr.Name.Local
-					attrValue := attr.Value
-					fmt.Printf("An attribute is: %s %s\n", attrName, attrValue)
-					// ...
-				}
-			case xml.EndElement:
-				fmt.Println("End of token")
-			case xml.CharData:
-				content := string([]byte(token))
-				fmt.Printf("This is the content: %v\n", content )
-				// ...
-			default:
+		case xml.StartElement:
+			name := token.Name.Local
+			fmt.Printf("Token name: %s\n", name)
+			for _, attr := range token.Attr {
+				attrName := attr.Name.Local
+				attrValue := attr.Value
+				fmt.Printf("An attribute is: %s %s\n", attrName, attrValue)
 				// ...
+			}
+		case xml.EndElement:
+			fmt.Println("End of token")
+		case xml.CharData:
+			content := string([]byte(token))
+			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/even.go

@@ -1,10 +1,10 @@
 // even.go
 package even
 
-func Even(i int) bool {		// Exported function
+func Even(i int) bool { // Exported function
 	return i%2 == 0
 }
 
-func Odd(i int) bool {		// Exported function
+func Odd(i int) bool { // Exported function
 	return i%2 != 0
 }

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

@@ -1,61 +1,61 @@
 // 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,
-   			Files: []*os.File{
-   				os.Stdin,
-   				os.Stdout,
-   				os.Stderr,
-   			},
-   		}
+		Env: env,
+		Files: []*os.File{
+			os.Stdin,
+			os.Stdout,
+			os.Stderr,
+		},
+	}
 	// 1st example: list files
 	pid, err := os.StartProcess("/bin/ls", []string{"ls", "-l"}, procAttr)
 	if err != nil {
-			fmt.Printf("Error %v starting process!", err)  // 
-			os.Exit(1)
+		fmt.Printf("Error %v starting process!", err) //
+		os.Exit(1)
 	}
 	fmt.Printf("The process id is %v", pid)
 	// 2nd example: show all processes
 	pid, err = os.StartProcess("/bin/ps", []string{"-e", "-opid,ppid,comm"}, procAttr)
 	if err != nil {
-			fmt.Printf("Error %v starting process!", err)  // 
-			os.Exit(1)
+		fmt.Printf("Error %v starting process!", err) //
+		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 ?
-	cmd := exec.Command("gedit")  // this opens a gedit-window
+	// 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 {
 		fmt.Printf("Error %v executing command!", err)
 		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

@@ -2,29 +2,30 @@
 package main
 
 import (
-	"fmt"
 	"./parse/parse"
+	"fmt"
 )
 
 func main() {
-        var examples = []string{
-                "1 2 3 4 5",
-                "100 50 25 12.5 6.25",
-                "2 + 2 = 4",
-                "1st class",
-                "",
-        }
+	var examples = []string{
+		"1 2 3 4 5",
+		"100 50 25 12.5 6.25",
+		"2 + 2 = 4",
+		"1st class",
+		"",
+	}
 
-        for _, ex := range examples {
-                fmt.Printf("Parsing %q:\n  ", ex)
-                nums, err := parse.Parse(ex)
-                if err != nil {
-                        fmt.Println(err) // here String() method from ParseError is used
-                        continue
-                }
-                fmt.Println(nums)
-        }
+	for _, ex := range examples {
+		fmt.Printf("Parsing %q:\n  ", ex)
+		nums, err := parse.Parse(ex)
+		if err != nil {
+			fmt.Println(err) // here String() method from ParseError is used
+			continue
+		}
+		fmt.Println(nums)
+	}
 }
+
 /* Output:
 Parsing "1 2 3 4 5":
   [1 2 3 4 5]

eBook/examples/chapter_13/parse/parse.go

@@ -3,49 +3,49 @@ package parse
 
 import (
 	"fmt"
-	"strings"
 	"strconv"
+	"strings"
 )
 
 // A ParseError indicates an error in converting a word into an integer.
 type ParseError struct {
-        Index int      // The index into the space-separated list of words.
-        Word  string   // The word that generated the parse error.
-        Err error // The raw error that precipitated this error, if any.
+	Index int    // The index into the space-separated list of words.
+	Word  string // The word that generated the parse error.
+	Err   error  // The raw error that precipitated this error, if any.
 }
 
 // String returns a human-readable error message.
 func (e *ParseError) String() string {
-        return fmt.Sprintf("pkg parse: error parsing %q as int", e.Word)
+	return fmt.Sprintf("pkg parse: error parsing %q as int", e.Word)
 }
 
 // Parse parses the space-separated words in in put as integers.
 func Parse(input string) (numbers []int, err error) {
-        defer func() {
-                if r := recover(); r != nil {
-                        var ok bool
-                        err, ok = r.(error)
-                        if !ok {
-                                err = fmt.Errorf("pkg: %v", r)
-                        }
-                }
-        }()
+	defer func() {
+		if r := recover(); r != nil {
+			var ok bool
+			err, ok = r.(error)
+			if !ok {
+				err = fmt.Errorf("pkg: %v", r)
+			}
+		}
+	}()
 
-        fields := strings.Fields(input)
-        numbers = fields2numbers(fields)
-        return
+	fields := strings.Fields(input)
+	numbers = fields2numbers(fields)
+	return
 }
 
 func fields2numbers(fields []string) (numbers []int) {
-        if len(fields) == 0 {
-                panic("no words to parse")
-        }
-        for idx, field := range fields {
-                num, err := strconv.Atoi(field)
-                if err != nil {
-                        panic(&ParseError{idx, field, err})
-                }
-                numbers = append(numbers, num)
-        }
-        return
+	if len(fields) == 0 {
+		panic("no words to parse")
+	}
+	for idx, field := range fields {
+		num, err := strconv.Atoi(field)
+		if err != nil {
+			panic(&ParseError{idx, field, err})
+		}
+		numbers = append(numbers, num)
+	}
+	return
 }

eBook/examples/chapter_14/benchmark_channels.go

@@ -7,7 +7,7 @@ import (
 
 func main() {
 	fmt.Println(" sync", testing.Benchmark(BenchmarkChannelSync).String())
-	fmt.Println("buffered",	testing.Benchmark(BenchmarkChannelBuffered).String())
+	fmt.Println("buffered", testing.Benchmark(BenchmarkChannelBuffered).String())
 }
 
 func BenchmarkChannelSync(b *testing.B) {
@@ -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:
-				fmt.Printf("%d - Received on channel 1: %d\n", i, v)
-			case v := <- ch2:
-				fmt.Printf("%d - Received on channel 2: %d\n", i, v)
+		case v := <-ch1:
+			fmt.Printf("%d - Received on channel 1: %d\n", i, v)
+		case v := <-ch2:
+			fmt.Printf("%d - Received on channel 2: %d\n", i, v)
 		}
 	}
 }
-
-

eBook/examples/chapter_14/lazy_evaluation.go

@@ -8,19 +8,19 @@ import (
 var resume chan int
 
 func integers() chan int {
-    yield := make (chan int)
-    count := 0
-    go func () {
-        for {
-            yield <- count
-            count++
-        }
-    } ()
-    return yield
+	yield := make(chan int)
+	count := 0
+	go func() {
+		for {
+			yield <- count
+			count++
+		}
+	}()
+	return yield
 }
 
 func generateInteger() int {
-    return <-resume
+	return <-resume
 }
 func main() {
 	resume = integers()

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 {
@@ -13,16 +14,16 @@ func process(r *Request) {
 }
 
 func handle(r *Request) {
-   sem <- 1    // doesn't matter what we put in it
-   process(r)  
-   <-sem       // one empty place in the buffer: the next request can start 
+	sem <- 1 // doesn't matter what we put in it
+	process(r)
+	<-sem // one empty place in the buffer: the next request can start
 }
 
 func server(service chan *Request) {
-   for {
-       request := <-service
-       go handle(request) 
-   }
+	for {
+		request := <-service
+		go handle(request)
+	}
 }
 
 func main() {

eBook/examples/chapter_14/multiplex_server2.go

@@ -19,10 +19,10 @@ func run(op binOp, req *Request) {
 func server(op binOp, service chan *Request, quit chan bool) {
 	for {
 		select {
-			case req := <-service:
-				go run(op, req) 
-			case <-quit:
-				return
+		case req := <-service:
+			go run(op, req)
+		case <-quit:
+			return
 		}
 	}
 }

eBook/examples/chapter_14/timer_goroutine.go

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

eBook/examples/chapter_16/closures_goroutines.go

@@ -10,10 +10,10 @@ var values = [5]int{10, 11, 12, 13, 14}
 
 func main() {
 	// version A:
-	for ix := range values {  // ix is index!
+	for ix := range values { // ix is index!
 		func() {
 			fmt.Print(ix, " ")
-		}()					   // call closure, prints each index 
+		}() // call closure, prints each index
 	}
 	fmt.Println()
 	// version B: same as A, but call closure as a goroutine
@@ -25,20 +25,21 @@ func main() {
 	time.Sleep(1e9)
 	// version C: the right way
 	for ix := range values {
-    	go func(ix interface{}) {
-        	fmt.Print(ix, " ")
-    	}(ix)
+		go func(ix interface{}) {
+			fmt.Print(ix, " ")
+		}(ix)
 	}
 	time.Sleep(1e9)
 	// version D: print out the values:
 	for ix := range values {
-    	val := values[ix]
-    	go func() {
-       		fmt.Print(val, " ")
-    	}()
+		val := values[ix]
+		go func() {
+			fmt.Print(val, " ")
+		}()
 	}
 	time.Sleep(1e9)
 }
+
 /* Output:
 0 1 2 3 4
 4 4 4 4 4

eBook/examples/chapter_16/pointer_interface.go

@@ -6,13 +6,12 @@ import (
 )
 
 type nexter interface {
-    next() byte
+	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_v1/store.go

@@ -3,8 +3,8 @@ package main
 import "sync"
 
 type URLStore struct {
-	urls  map[string]string
-	mu    sync.RWMutex
+	urls map[string]string
+	mu   sync.RWMutex
 }
 
 func NewURLStore() *URLStore {

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_v2/store.go

@@ -9,9 +9,9 @@ import (
 )
 
 type URLStore struct {
-	urls     map[string]string
-	mu       sync.RWMutex
-	file     *os.File
+	urls map[string]string
+	mu   sync.RWMutex
+	file *os.File
 }
 
 type record struct {

eBook/examples/chapter_19/goto_v3/store.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-//	"bufio"
+	//	"bufio"
 	"encoding/gob"
 	"io"
 	"log"
@@ -12,9 +12,9 @@ import (
 const saveQueueLength = 1000
 
 type URLStore struct {
-	urls  map[string]string
-	mu    sync.RWMutex
-	save  chan record
+	urls map[string]string
+	mu   sync.RWMutex
+	save chan record
 }
 
 type record struct {
@@ -103,7 +103,7 @@ func (s *URLStore) saveLoop(filename string) {
 	// e := gob.NewEncoder(b)
 	// defer b.Flush()
 	for {
-		r := <-s.save  // takes a record from the channel
+		r := <-s.save // takes a record from the channel
 		if err := e.Encode(r); err != nil {
 			log.Println("Error saving to URLStore: ", err)
 		}

eBook/examples/chapter_19/goto_v4/store.go

@@ -11,9 +11,9 @@ import (
 const saveQueueLength = 1000
 
 type URLStore struct {
-	urls  map[string]string
-	mu    sync.RWMutex
-	save  chan record
+	urls map[string]string
+	mu   sync.RWMutex
+	save chan record
 }
 
 type record struct {
@@ -95,7 +95,7 @@ func (s *URLStore) saveLoop(filename string) {
 	defer f.Close()
 	e := json.NewEncoder(f)
 	for {
-		r := <-s.save  // takes a record from the channel
+		r := <-s.save // takes a record from the channel
 		if err := e.Encode(r); err != nil {
 			log.Println("Error saving to URLStore: ", err)
 		}

eBook/examples/chapter_19/goto_v5/main.go

@@ -36,7 +36,7 @@ func main() {
 
 func Redirect(w http.ResponseWriter, r *http.Request) {
 	key := r.URL.Path[1:]
-	if key == ""  {
+	if key == "" {
 		http.NotFound(w, r)
 		return
 	}

eBook/examples/chapter_19/goto_v5/store.go

@@ -5,8 +5,8 @@ import (
 	"errors"
 	"io"
 	"log"
-	"os"
 	"net/rpc"
+	"os"
 	"sync"
 )
 
@@ -18,14 +18,14 @@ type Store interface {
 }
 
 type ProxyStore struct {
-	urls   *URLStore  // local cache
+	urls   *URLStore // local cache
 	client *rpc.Client
 }
 
 type URLStore struct {
-	urls  map[string]string
-	mu    sync.RWMutex
-	save  chan record
+	urls map[string]string
+	mu   sync.RWMutex
+	save chan record
 }
 
 type record struct {

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_version1.go

@@ -1,14 +1,14 @@
 package hello
 
 import (
-    "fmt"
-    "net/http"
+	"fmt"
+	"net/http"
 )
 
 func init() {
-    http.HandleFunc("/", handler)
+	http.HandleFunc("/", handler)
 }
 
 func handler(w http.ResponseWriter, r *http.Request) {
-    fmt.Fprint(w, "Hello, world!")
+	fmt.Fprint(w, "Hello, world!")
 }

eBook/examples/chapter_20/helloapp/hello/helloworld2_version2.go

@@ -1,28 +1,28 @@
 package hello
 
 import (
-    "appengine"
-    "appengine/user"
-    "fmt"
-    "net/http"
+	"appengine"
+	"appengine/user"
+	"fmt"
+	"net/http"
 )
 
 func init() {
-    http.HandleFunc("/", handler)
+	http.HandleFunc("/", handler)
 }
 
 func handler(w http.ResponseWriter, r *http.Request) {
-    c := appengine.NewContext(r)
-    u := user.Current(c)
-    if u == nil {
-        url, err := user.LoginURL(c, r.URL.String())
-        if err != nil {
-            http.Error(w, err.String(), http.StatusInternalServerError)
-            return
-        }
-        w.Header().Set("Location", url)
-        w.WriteHeader(http.StatusFound)
-        return
-    }
-    fmt.Fprintf(w, "Hello, %v!", u)
+	c := appengine.NewContext(r)
+	u := user.Current(c)
+	if u == nil {
+		url, err := user.LoginURL(c, r.URL.String())
+		if err != nil {
+			http.Error(w, err.String(), http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Location", url)
+		w.WriteHeader(http.StatusFound)
+		return
+	}
+	fmt.Fprintf(w, "Hello, %v!", u)
 }

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

@@ -1,9 +1,9 @@
 package hello
 
 import (
-    "fmt"
-    "net/http"
-    "template"
+	"fmt"
+	"net/http"
+	"template"
 )
 
 const guestbookForm = `
@@ -24,23 +24,23 @@ const signTemplateHTML = `
   </body>
 </html>
 `
+
 var signTemplate = template.Must(template.New("sign").Parse(signTemplateHTML))
 
 func init() {
-    http.HandleFunc("/", root)
-    http.HandleFunc("/sign", sign)
+	http.HandleFunc("/", root)
+	http.HandleFunc("/sign", sign)
 }
 
 func root(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/html")
-    fmt.Fprint(w, guestbookForm)
+	fmt.Fprint(w, guestbookForm)
 }
 
 func sign(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/html")
-    err := signTemplate.Execute(w, r.FormValue("content"))
-    if err != nil {
-        http.Error(w, err.String(), http.StatusInternalServerError)
-    }
+	err := signTemplate.Execute(w, r.FormValue("content"))
+	if err != nil {
+		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_3/CandGo/c1.go

@@ -5,9 +5,9 @@ package rand
 import "C"
 
 func Random() int {
-   return int(C.random())
+	return int(C.random())
 }
 
 func Seed(i int) {
-   C.srandom(C.uint(i))
+	C.srandom(C.uint(i))
 }

eBook/examples/chapter_3/CandGo/c2.go

@@ -7,7 +7,7 @@ import "C"
 import "unsafe"
 
 func Print(s string) {
-   cs := C.CString(s)
-   defer C.free(unsafe.Pointer(cs))
-   C.fputs(cs, (*C.FILE)(C.stdout))
+	cs := C.CString(s)
+	defer C.free(unsafe.Pointer(cs))
+	C.fputs(cs, (*C.FILE)(C.stdout))
 }

eBook/examples/chapter_4/alias.go

@@ -1,6 +1,6 @@
 package main
 
-import fm "fmt"  // alias
+import fm "fmt" // alias
 
 func main() {
 	fm.Println("hello, world")

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/time.go

@@ -9,18 +9,18 @@ var week time.Duration
 
 func main() {
 	t := time.Now()
-	fmt.Println(t)     // Wed Dec 21 09:52:14 +0100 RST 2011
+	fmt.Println(t)                                              // Wed Dec 21 09:52:14 +0100 RST 2011
 	fmt.Printf("%02d.%02d.%4d\n", t.Day(), t.Month(), t.Year()) // 21.12.2011
 	t = time.Now().UTC()
 	fmt.Println(t)          // Wed Dec 21 08:52:14 +0000 UTC 2011
 	fmt.Println(time.Now()) // Wed Dec 21 09:52:14 +0100 RST 2011
 	// calculating times:
-	week = 60 * 60 * 24 * 7 * 1e9  // must be in nanosec
+	week = 60 * 60 * 24 * 7 * 1e9 // must be in nanosec
 	week_from_now := t.Add(week)
-	fmt.Println(week_from_now)      // Wed Dec 28 08:52:14 +0000 UTC 2011
+	fmt.Println(week_from_now) // Wed Dec 28 08:52:14 +0000 UTC 2011
 	// formatting times:
-	fmt.Println(t.Format(time.RFC822))     // 21 Dec 11 0852 UTC
-	fmt.Println(t.Format(time.ANSIC))      // Wed Dec 21 08:56:34 2011
+	fmt.Println(t.Format(time.RFC822))         // 21 Dec 11 0852 UTC
+	fmt.Println(t.Format(time.ANSIC))          // Wed Dec 21 08:56:34 2011
 	fmt.Println(t.Format("02 Jan 2006 15:04")) // 21 Dec 2011 08:52
 	s := t.Format("20060102")
 	fmt.Println(t, "=>", s) // Wed Dec 21 08:52:14 +0000 UTC 2011 => 20111221

eBook/examples/chapter_4/type_mixing.go

@@ -4,6 +4,6 @@ func main() {
 	var a int
 	var b int32
 	a = 15
-	b = a + a	 // compiler error
-	b = b + 5    // ok: 5 is a constant 
+	b = a + a // compiler error
+	b = b + 5 // ok: 5 is a constant
 }