Fix #33 - https://tour.golang.org/moretypes/23-24

sidik/moretypes_1.go

@@ -0,0 +1,14 @@
+package sidik
+
+import "fmt"
+
+func type1()  {
+	i := 1000
+	p := &i
+	fmt.Println("i before = ",i)
+
+	*p = 2000
+
+	fmt.Println("i after = ",i)
+
+}

sidik/moretypes_10.go

@@ -0,0 +1,17 @@
+package sidik
+
+import "fmt"
+
+func type10() {
+	s := []int{4,5,3,1,3,8,9}
+
+	s = s[1:4]
+	fmt.Println(s)
+
+	s = s[:2]
+	fmt.Println(s)
+
+	s = s[:1]
+	fmt.Println(s)
+
+}

sidik/moretypes_11.go

@@ -0,0 +1,21 @@
+package sidik
+
+import "fmt"
+
+func type11() {
+	s := []int{5, 2, 6, 7, 8, 9, 10}
+	printSlice(s)
+
+	s = s[:0]
+	printSlice(s)
+
+	s = s[:4]
+	printSlice(s)
+
+	s = s[2:]
+	printSlice(s)
+}
+
+func printSlice(s []int)  {
+	fmt.Printf("len=%d cap=%d %v\n", len(s), cap(s), s)
+}

sidik/moretypes_12.go

@@ -0,0 +1,12 @@
+package sidik
+
+import "fmt"
+
+func type12() {
+	var s []int
+	fmt.Println(s, len(s), cap(s))
+	if s == nil {
+		fmt.Println("nil!")
+	}
+
+}

sidik/moretypes_13.go

@@ -0,0 +1,21 @@
+package sidik
+
+import "fmt"
+
+func type13() {
+	a := make([]int , 5)
+	printSlice2("a", a)
+
+	b := make([]int, 0, 5)
+	printSlice2("b", b)
+
+	c := b[:2]
+	printSlice2("c", c)
+
+	d := c[2:5]
+	printSlice2("d", d)
+}
+
+func printSlice2(s string ,x []int)  {
+	fmt.Printf("%s len=%d cap=%d %v\n", s , len(x), cap(x), x)
+}

sidik/moretypes_14.go

@@ -0,0 +1,24 @@
+package sidik
+
+import (
+	"fmt"
+	"strings"
+)
+
+func type14() {
+	board := [][]string {
+		[]string{"_", "_", "_"},
+		[]string{"_", "_", "_"},
+		[]string{"_", "_", "_"},
+	}
+
+	board[0][0] = "X"
+	board[2][2] = "O"
+	board[1][2] = "X"
+	board[1][0]	= "O"
+	board[0][2]	= "X"
+
+	for i := 0; i < len(board); i++ {
+		fmt.Printf("%s\n", strings.Join(board[i], ""))
+	}
+}

sidik/moretypes_15.go

@@ -0,0 +1,19 @@
+package sidik
+
+import "fmt"
+
+func type15() {
+	var s []int
+	printSlice3(s)
+
+	s = append(s, 1)
+	printSlice3(s)
+
+	s = append(s, 2,3,4)
+	printSlice3(s)
+
+}
+
+func printSlice3(s []int)  {
+	fmt.Printf("len=%d cap=%d %v\n", len(s), cap(s), s)
+}

sidik/moretypes_16.go

@@ -0,0 +1,11 @@
+package sidik
+
+import "fmt"
+
+var poq = []int{1, 2, 4, 8, 16, 32, 64, 128}
+
+func type16() {
+	for i, v := range poq {
+		fmt.Printf("2**%d = %d\n", i, v)
+	}
+}

sidik/moretypes_17.go

@@ -0,0 +1,15 @@
+package sidik
+
+import "fmt"
+
+func type17() {
+	ppow := make([]int, 10)
+	for i := range ppow {
+		ppow[i] = 1 <<  uint(i) // 2**i
+
+	}
+
+	for _, value := range ppow {
+		fmt.Printf("%d\n", value)
+	}
+}

sidik/moretypes_18.go

@@ -0,0 +1,21 @@
+package sidik
+
+import (
+	"golang.org/x/tour/pic"
+)
+
+func Pic(dx, dy int) [][]uint8 {
+	sdx := make([][]uint8, dx)
+	for y := 0; y < dy; y++ {
+		sdy := make([]uint8, dy)
+		for x := 0; x < dx; x++ {
+			sdy[x] = uint8((x+y)*4)
+		}
+		sdx[y] = sdy
+	}
+	return sdx
+}
+
+func type18() {
+	pic.Show(Pic)
+}

sidik/moretypes_19.go

@@ -0,0 +1,19 @@
+package sidik
+
+import "fmt"
+
+type Vertexx struct {
+	Lat, Long float64
+}
+
+var m map[string]Vertexx
+
+func type19() {
+	m = make(map[string]Vertexx)
+	m["Bell Labs"] = Vertexx{
+		40.68433, -74.39967,
+	}
+
+	fmt.Println(m["Bell Labs"])
+
+}

sidik/moretypes_2.go

@@ -0,0 +1,13 @@
+package sidik
+
+import "fmt"
+
+type Vertex struct {
+	X int
+	Y int
+	Z int
+}
+
+func type2() {
+	fmt.Println(Vertex{7, 5, 8})
+}

sidik/moretypes_20.go

@@ -0,0 +1,20 @@
+package sidik
+
+import "fmt"
+
+type Vertex4 struct{
+	Lat, Long float64
+}
+
+var mn = map[string]Vertex4{
+	"Bell Labs" : Vertex4{
+		40.68433, -74.39967,
+	},
+	"Google Inc" : Vertex4{
+		37.42202, -122.08408,
+	},
+}
+
+func type20() {
+	fmt.Println(mn)
+}

sidik/moretypes_21.go

@@ -0,0 +1,16 @@
+package sidik
+
+import "fmt"
+
+type Vertex5 struct {
+	Lat, Long float64
+}
+
+var maa = map[string]Vertex5{
+	"Bell Labs": {40.68433, -74.39967},
+	"Google Inc" : {37.42202, -122.08408},
+}
+
+func type21() {
+	fmt.Println(maa)
+}

sidik/moretypes_22.go

@@ -0,0 +1,19 @@
+package sidik
+
+import "fmt"
+
+func type22() {
+	mm := make(map[string]int)
+
+	mm["Answer"] = 42
+	fmt.Println("The Value: ", mm["Answer"])
+
+	mm["Answer"] = 48
+	fmt.Println("The Value: ", mm["Answer"])
+
+	delete(mm, "Answer")
+	fmt.Println("The Value: ", mm["Answer"])
+
+	v, ok := mm["Answer"]
+	fmt.Println("The Value: ", v ,"Present", ok)
+}

sidik/moretypes_23.go

@@ -0,0 +1,22 @@
+package sidik
+
+import (
+	"strings"
+
+	"golang.org/x/tour/wc"
+)
+
+func WordCount(s string) map[string]int {
+	words := strings.Fields(s)
+		result := make(map[string]int)
+
+		for _, word := range words{
+			result[word] += 1
+		}
+
+		return result
+}
+
+func type23() {
+	wc.Test(WordCount)
+}

sidik/moretypes_24.go

@@ -0,0 +1,21 @@
+package sidik
+
+import (
+	"fmt"
+	"math"
+)
+
+func compute(fn func(float64, float64) float64) float64 {
+	return fn(3, 4)
+}
+
+func type24() {
+	hypot := func (x, y float64) float64 {
+		return math.Sqrt(x*x + y*y)
+	}
+
+	fmt.Println(hypot(5, 12))
+
+	fmt.Println(compute(hypot))
+	fmt.Println(compute(math.Pow))
+}

sidik/moretypes_3.go

@@ -0,0 +1,18 @@
+package sidik
+
+import "fmt"
+
+type Vertex1 struct {
+	X int
+	Y int
+	Z int
+}
+
+func type3() { //mengakses properti struct dengan titik
+	p := Vertex{8, 4, 10}
+	p.X = 19
+	p.Z	= 8
+
+	fmt.Println(p.X, p.Z)
+
+}

sidik/moretypes_4.go

@@ -0,0 +1,17 @@
+package sidik
+
+import "fmt"
+
+type Vertex2 struct {
+	X int
+	Y int
+}
+
+func type4() {
+	i := Vertex2{2, 3}
+	p := &i
+	p.Y = 8
+
+	fmt.Println(i)
+
+}

sidik/moretypes_5.go

@@ -0,0 +1,18 @@
+package sidik
+
+import "fmt"
+
+type Vertex3 struct {
+	X, Y int
+}
+
+var (
+	v = Vertex3{5, 44} // struct asli
+	v2 = Vertex3{X:6} // mengakses satu property di struct
+	v3 = Vertex3{} // struct zzero value
+	p = &Vertex3{3,4} //pointer struct, harus dengan * jika ingin value yang asli 
+)
+
+func type5() {
+	fmt.Println(v, v2, v3, p)
+}