fix: coding style and file format for chapter 11, 12, 13, 14 and 15.

eBook/exercises/chapter_11/float_sortmain.go

@@ -1,8 +1,8 @@
 package main
 
 import (
-     	"fmt"
 	"./float64"
+	"fmt"
 )
 
 func main() {

eBook/exercises/chapter_11/interface_poly3.go

@@ -11,6 +11,7 @@ type Shaper interface {
 }
 
 type Shape struct{}
+
 func (sh Shape) Area() float32 {
 	return -1 // the shape is indetermined, so we return something impossible
 }
@@ -49,11 +50,12 @@ func main() {
 	c := &Circle{2.5, s}
 	shapes := []Shaper{r, q, c, s}
 	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}
@@ -65,4 +67,3 @@ Area of this shape is:  19.634954
 Shape details:  {}
 Area of this shape is:  -1
 */
-

eBook/exercises/chapter_11/interfaces_ext.go

@@ -18,6 +18,7 @@ type AreaInterface interface {
 type PeriInterface interface {
 	Perimeter() float32
 }
+
 func main() {
 	var areaIntf AreaInterface
 	var periIntf PeriInterface

eBook/exercises/chapter_11/interfaces_poly2.go

@@ -41,11 +41,12 @@ func main() {
 	fmt.Println("Looping through shapes for area ...")
 	// shapes := []Shaper{Shaper(r), Shaper(q), Shaper(c)}
 	shapes := []Shaper{r, q, c}
-   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}

eBook/exercises/chapter_11/main_stack.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-	"fmt"
 	"./stack/stack"
+	"fmt"
 )
 
 var st1 stack.Stack
@@ -21,6 +21,7 @@ func main() {
 		fmt.Println(item)
 	}
 }
+
 /* Output:
 [Java C++ Python C# Ruby]
 100

eBook/exercises/chapter_11/map_function_interface.go

@@ -30,7 +30,7 @@ func main() {
 	}
 }
 
-func mapFunc(mf func(obj) obj, list []obj) ([]obj) {
+func mapFunc(mf func(obj) obj, list []obj) []obj {
 	result := make([]obj, len(list))
 
 	for ix, v := range list {
@@ -45,6 +45,7 @@ func mapFunc(mf func(obj) obj, list []obj) ([]obj) {
 	*/
 	return result
 }
+
 /* Output:
 0
 2

eBook/exercises/chapter_11/map_function_interface_var.go

@@ -27,7 +27,7 @@ func main() {
 	}
 }
 
-func mapFunc(mf func(obj) obj, list ...obj) ([]obj) {
+func mapFunc(mf func(obj) obj, list ...obj) []obj {
 	result := make([]obj, len(list))
 
 	for ix, v := range list {
@@ -42,6 +42,7 @@ func mapFunc(mf func(obj) obj, list ...obj) ([]obj) {
 	*/
 	return result
 }
+
 /* Output:
 0
 2

eBook/exercises/chapter_11/min_interface.go

@@ -18,11 +18,13 @@ func Min(data Miner) interface{}  {
 }
 
 type IntArray []int
+
 func (p IntArray) Len() int                  { return len(p) }
 func (p IntArray) ElemIx(ix int) interface{} { return p[ix] }
 func (p IntArray) Less(i, j int) bool        { return p[i] < p[j] }
 
 type StringArray []string
+
 func (p StringArray) Len() int                  { return len(p) }
 func (p StringArray) ElemIx(ix int) interface{} { return p[ix] }
 func (p StringArray) Less(i, j int) bool        { return p[i] < p[j] }

eBook/exercises/chapter_11/minmain.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-     	"fmt"
 	"./min"
+	"fmt"
 )
 
 func ints() {

eBook/exercises/chapter_11/point_interfaces.go

@@ -62,6 +62,7 @@ func main() {
 	mag += m.Abs()
 	fmt.Printf("The float64 mag is now: %f", mag)
 }
+
 /* Output:
 The length of the vector p1 is: 5.000000
 The length of the vector p2 is: 6.403124

eBook/exercises/chapter_11/print.go

@@ -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/exercises/chapter_11/simple_interface.go

@@ -31,4 +31,5 @@ func main() {
 	var s Simple
 	fmt.Println(fI(&s)) // &s is required because Get() is defined with a receiver type pointer
 }
+
 // Output: 5

eBook/exercises/chapter_11/simple_interface2.go

@@ -55,6 +55,7 @@ func main() {
 	var r RSimple
 	fmt.Println(fI(&r))
 }
+
 /* Output:
 5
 50

eBook/exercises/chapter_11/simple_interface3.go

@@ -49,7 +49,6 @@ func fI(it Simpler) int {
 	return 0
 }
 
-
 func gI(any interface{}) int {
 	// return any.(Simpler).Get()   // unsafe, runtime panic possible
 	if v, ok := any.(Simpler); ok {
@@ -57,6 +56,7 @@ func gI(any interface{}) int {
 	}
 	return 0 // default value
 }
+
 /* Output:
 6
 60
@@ -68,6 +68,7 @@ func main() {
 	var r RSimple = RSimple{60, 60}
 	fmt.Println(gI(&r))
 }
+
 /* Output:
 6
 60

eBook/exercises/chapter_11/sort_persons.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-	"fmt"
 	"./sort"
+	"fmt"
 )
 
 type Person struct {

eBook/exercises/chapter_12/calculator.go

@@ -4,11 +4,11 @@
 package main
 
 import (
-	"fmt"
-	"strconv"
-	"bufio"
-	"os"
 	"./stack/stack"
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
 )
 
 func main() {

eBook/exercises/chapter_12/cat_numbered.go

@@ -1,11 +1,11 @@
 package main
 
 import (
-	"os"
-	"io"
-	"fmt"
 	"bufio"
 	"flag"
+	"fmt"
+	"io"
+	"os"
 )
 
 var numberFlag = flag.Bool("n", false, "number each line")

eBook/exercises/chapter_12/degob.go

@@ -3,8 +3,8 @@ package main
 
 import (
 	"bufio"
-	"fmt"
 	"encoding/gob"
+	"fmt"
 	"log"
 	"os"
 )
@@ -37,5 +37,6 @@ func main() {
 	}
 	fmt.Println(vc)
 }
+
 // Output:
 // {Jan Kersschot [0x12642e60 0x12642e80] none}

eBook/exercises/chapter_12/hash_md5.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-       "fmt";  
 	"crypto/md5"
+	"fmt"
 	"io"
 )
 
@@ -14,6 +14,7 @@ func main() {
 	fmt.Printf("Result: %x\n", hasher.Sum(b))
 	fmt.Printf("Result: %d\n", hasher.Sum(b))
 }
+
 /* Output:
 Result: 098f6bcd4621d373cade4e832627b4f6
 Result: [9 143 107 205 70 33 211 115 202 222 78 131 38 39 180 246]

eBook/exercises/chapter_12/read_csv.go

@@ -4,8 +4,8 @@ package main
 import (
 	"bufio"
 	"fmt"
-	"log"
 	"io"
+	"log"
 	"os"
 	"strconv"
 	"strings"
@@ -59,6 +59,7 @@ func main() {
 		fmt.Println(bk)
 	}
 }
+
 /* Output:
 We have read the following books from the file:
 {"The ABC of Go" 25.5 1500}

eBook/exercises/chapter_12/remove_3till5char.go

@@ -2,9 +2,9 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"io"
-	"bufio"
 	"os"
 )
 
@@ -27,7 +27,7 @@ func main() {
 		//fmt.Printf("The output was: --%s--", outputString)
 		_, err := outputWriter.WriteString(outputString)
 		//fmt.Printf("Number of bytes written %d\n", n)
-		if (err != nil) {
+		if err != nil {
 			fmt.Println(err)
 			return
 		}

eBook/exercises/chapter_12/stack/stack_struct.go

@@ -2,6 +2,7 @@
 package stack
 
 import "strconv"
+
 const LIMIT = 10
 
 type Stack struct {
@@ -10,7 +11,7 @@ type Stack struct {
 }
 
 func (st *Stack) Push(n int) {
-	if (st.ix + 1 > LIMIT) {
+	if st.ix+1 > LIMIT {
 		return // stack is full!
 	}
 	st.data[st.ix] = n
@@ -29,4 +30,3 @@ func (st Stack) String() string {
 	}
 	return str
 }
-

eBook/exercises/chapter_12/wiki_part1.go

@@ -33,6 +33,7 @@ func main() {
 	new_page.load("Page.md")
 	fmt.Println(string(new_page.Body))
 }
+
 /* Output:
  * # Page
  * ## Section1

eBook/exercises/chapter_12/word_letter_count.go

@@ -2,11 +2,12 @@
 package main
 
 import (
-	"fmt"
 	"bufio"
+	"fmt"
 	"os"
 	"strings"
 )
+
 var nrchars, nrwords, nrlines int
 
 func main() {

eBook/exercises/chapter_13/panic_defer.go

@@ -28,6 +28,7 @@ func g(i int) {
 	fmt.Println("Printing in g", i)
 	g(i + 1)
 }
+
 /* Output:
 Calling g.
 Printing in g 0

eBook/exercises/chapter_13/panic_defer_convint.go

@@ -38,6 +38,7 @@ func IntFromInt64(l int64) (i int, err error) {
 	i = ConvertInt64ToInt(l)
 	return i, nil
 }
+
 /* Output:
 15000 converted to an int32 is 15000
 The conversion of 2147498647 to an int32 resulted in an error: 2147498647 is out of the int32 range

eBook/exercises/chapter_13/recover_divbyzero.go

@@ -14,19 +14,20 @@ func badCall() {
 func test() {
 	defer func() {
 		if e := recover(); e != nil {
-       fmt.Printf("Panicing %s\r\n", e);
+			fmt.Printf("Panicing %s\r\n", e)
 		}
 
 	}()
 	badCall()
-    fmt.Printf("After bad call\r\n");
+	fmt.Printf("After bad call\r\n")
 }
 
 func main() {
-   fmt.Printf("Calling test\r\n");
+	fmt.Printf("Calling test\r\n")
 	test()
-   fmt.Printf("Test completed\r\n");
+	fmt.Printf("Test completed\r\n")
 }
+
 /* Output:
 Calling test
 Panicing runtime error: integer divide by zero

eBook/exercises/chapter_13/string_reverse_test.go

@@ -9,9 +9,9 @@ type ReverseTest struct {
 }
 
 var ReverseTests = []ReverseTest{
-	ReverseTest{"ABCD", "DCBA"},
-	ReverseTest{"CVO-AZ", "ZA-OVC"},
-	ReverseTest{"Hello 世界", "界世 olleH"},
+	{"ABCD", "DCBA"},
+	{"CVO-AZ", "ZA-OVC"},
+	{"Hello 世界", "界世 olleH"},
 }
 
 func TestReverse(t *testing.T) {

eBook/exercises/chapter_14/channel_block3.go

@@ -14,6 +14,7 @@ func main() {
 	c <- 10
 	fmt.Println("sent", 10)
 }
+
 /* Output:
 sending 10
 (15 s later):

eBook/exercises/chapter_14/channel_buffer.go

@@ -14,6 +14,7 @@ func main() {
 	c <- 10
 	fmt.Println("sent", 10)
 }
+
 /* Output:
 sending 10
 sent 10   // prints immediately

eBook/exercises/chapter_14/concurrent_pi.go

@@ -39,6 +39,7 @@ func CalculatePi(n int) float64 {
 func term(ch chan float64, k float64) {
 	ch <- 4 * math.Pow(-1, k) / (2*k + 1)
 }
+
 /* Output:
 3.14179261359579
 The calculation took this amount of time: 0.028002

eBook/exercises/chapter_14/concurrent_pi2.go

@@ -39,6 +39,7 @@ func term(ch chan float64, start, end int) {
 	}
 	ch <- result
 }
+
 /* Output:
 3.1413926535917938
 The calculation took this amount of time: 0.002000

eBook/exercises/chapter_14/general_lazy_evalution2.go

@@ -45,6 +45,7 @@ func BuildLazyUInt64Evaluator(evalFunc EvalFunc, initState Any) func() uint64 {
 		return ef().(uint64)
 	}
 }
+
 /* Output:
 Fib nr 0: 0
 Fib nr 1: 1

eBook/exercises/chapter_14/gofibonacci.go

@@ -3,8 +3,8 @@ package main
 
 import (
 	"fmt"
-	"time"
 	"os"
+	"time"
 )
 
 func main() {

eBook/exercises/chapter_14/gofibonacci2.go

@@ -21,6 +21,7 @@ func main() {
 		fmt.Println(i)
 	}
 }
+
 /* Output:
 1
 1

eBook/exercises/chapter_14/gofibonacci_select.go

@@ -27,6 +27,7 @@ func main() {
 	}()
 	fibonacci(c, quit)
 }
+
 /* Output:
 1
 1

eBook/exercises/chapter_14/goroutine_select.go

@@ -28,4 +28,3 @@ func main() {
 		}
 	}
 }
-

eBook/exercises/chapter_14/multiplex_server3.go

@@ -52,6 +52,7 @@ func main() {
 	quit <- true
 	fmt.Print("done")
 }
+
 /* output:
 3+4=7 150+250=400
 done

eBook/exercises/chapter_14/polar_to_cartesian.go

@@ -92,6 +92,7 @@ func floatsForStrings(numbers []string) ([]float64, error) {
 	}
 	return floats, nil
 }
+
 /* Output:
 Enter a radius and an angle (in degrees), e.g., 12.5 90, or Ctrl+Z, Enter to qui
 t.

eBook/exercises/chapter_14/producer_consumer.go

@@ -28,6 +28,7 @@ func main() {
 
 	<-done
 }
+
 /* Output:
 0
 10

eBook/exercises/chapter_14/producer_consumer2.go

@@ -26,4 +26,5 @@ func main() {
 	go consume()
 	<-done
 }
+
 // Output: 0 1 2 3 4 5 6 7 8 9

eBook/exercises/chapter_15/client1.go

@@ -1,10 +1,10 @@
 package main
 
 import (
-	"fmt"
-	"os"
-	"net"
 	"bufio"
+	"fmt"
+	"net"
+	"os"
 	"strings"
 )
 

eBook/exercises/chapter_15/hello_server.go

@@ -16,4 +16,5 @@ func main() {
 	var h Hello
 	http.ListenAndServe("localhost:4000", h)
 }
+
 // Output in browser-window with url http://localhost:4000:  Hello!

eBook/exercises/chapter_15/http_fetch2.go

@@ -4,9 +4,9 @@ package main
 import (
 	"bufio"
 	"fmt"
-	"net/http"
 	"io/ioutil"
 	"log"
+	"net/http"
 	"os"
 	"strings"
 )

eBook/exercises/chapter_15/server1.go

@@ -2,8 +2,8 @@ package main
 
 import (
 	"fmt"
-	"os"
 	"net"
+	"os"
 	"strings"
 )
 

eBook/exercises/chapter_15/statistics.go

@@ -3,11 +3,11 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"net/http"
 	"sort"
-	"strings"
 	"strconv"
-	"log"
+	"strings"
 )
 
 type statistics struct {

eBook/exercises/chapter_15/template_validation_recover.go

@@ -2,9 +2,9 @@
 package main
 
 import (
-	"text/template"
 	"fmt"
 	"log"
+	"text/template"
 )
 
 func main() {
@@ -22,6 +22,7 @@ func main() {
 	fmt.Println("The next one ought to fail.")
 	template.Must(tErr.Parse(" some static text {{ .Name }"))
 }
+
 /* Output:
 The first one parsed OK.
 The next one ought to fail.

eBook/exercises/chapter_15/twitter_status_json.go

@@ -2,10 +2,10 @@
 package main
 
 import (
-       "net/http"  
-       "fmt"  
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
+	"net/http"
 )
 
 type Status struct {
@@ -27,6 +27,7 @@ func main()  {
 	json.Unmarshal(body, &user)
 	fmt.Printf("status: %s", user.Status.Text)
 }
+
 /* Output:
 status: Robot cars invade California, on orders from Google:
 Google has been testing self-driving cars ... http://bit.ly/cbtpUN http://retwt.me/97p

eBook/exercises/chapter_15/webhello2.go

@@ -2,8 +2,8 @@
 package main
 
 import (
-    "net/http"
 	"fmt"
+	"net/http"
 	"strings"
 )