Fix #34 - https://tour.golang.org/moretypes/24

roihan/flowcontrol_14.go

@@ -4,4 +4,5 @@ import "fmt"
 
 func flowcontrol14() {
 	fmt.Println("You finished this lesson!")
+	fmt.Println()
 }

roihan/moretypes_1.go

@@ -0,0 +1,16 @@
+package roihan
+
+import "fmt"
+
+func moretype1() {
+	i, j := 42, 2701
+
+	p := &i
+	fmt.Println(*p)
+	*p = 21
+	fmt.Println(i)
+
+	p = &j
+	*p = *p / 37
+	fmt.Println(j)
+}

roihan/moretypes_10.go

@@ -0,0 +1,16 @@
+package roihan
+
+import "fmt"
+
+func moretype10() {
+	s := []int{2, 3, 5, 7, 11, 13}
+
+	s = s[1:4]
+	fmt.Println(s)
+
+	s = s[:2]
+	fmt.Println(s)
+
+	s = s[1:]
+	fmt.Println(s)
+}

roihan/moretypes_11.go

@@ -0,0 +1,21 @@
+package roihan
+
+import "fmt"
+
+func moretype11() {
+	s := []int{2, 3, 5, 7, 11, 13}
+	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)
+}

roihan/moretypes_12.go

@@ -0,0 +1,11 @@
+package roihan
+
+import "fmt"
+
+func moretype12() {
+	var s []int
+	fmt.Println(s, len(s), cap(s))
+	if s == nil {
+		fmt.Println("nil!")
+	}
+}

roihan/moretypes_13.go

@@ -0,0 +1,21 @@
+package roihan
+
+import "fmt"
+
+func moretype13() {
+	a := make([]int, 5)
+	PrintSlice("a", a)
+
+	b := make([]int, 0, 5)
+	PrintSlice("b", b)
+
+	c := b[:2]
+	PrintSlice("c", c)
+
+	d := c[2:5]
+	PrintSlice("d", d)
+}
+
+func PrintSlice(s string, x []int) {
+	fmt.Printf("%s len=%d cap=%d %v\n", s, len(x), cap(x), x)
+}

roihan/moretypes_14.go

@@ -0,0 +1,24 @@
+package roihan
+
+import (
+	"fmt"
+	"strings"
+)
+
+func moretype14() {
+	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], ""))
+	}
+}

roihan/moretypes_15.go

@@ -0,0 +1,21 @@
+package roihan
+
+import "fmt"
+
+func moretype15() {
+	var s []int
+	Printslice(s)
+
+	s = append(s, 0)
+	Printslice(s)
+
+	s = append(s, 1)
+	Printslice(s)
+
+	s = append(s, 2, 3, 4)
+	Printslice(s)
+}
+
+func Printslice(s []int) {
+	fmt.Printf("len=%d cap=%d %v\n", len(s), cap(s), s)
+}

roihan/moretypes_16.go

@@ -0,0 +1,11 @@
+package roihan
+
+import "fmt"
+
+var pos = []int{1, 2, 4, 8, 16, 32, 64, 128}
+
+func moretype16() {
+	for i, v := range pos {
+		fmt.Printf("2**%d = %d\n", i, v)
+	}
+}

roihan/moretypes_17.go

@@ -0,0 +1,13 @@
+package roihan
+
+import "fmt"
+
+func moretype17() {
+	por := make([]int, 10)
+	for i := range por {
+		por[i] = 1 << uint(i)
+	}
+	for _, value := range por {
+		fmt.Printf("%d\n", value)
+	}
+}

roihan/moretypes_19.go

@@ -0,0 +1,17 @@
+package roihan
+
+import "fmt"
+
+type vertex struct {
+	Lat, Long float64
+}
+
+var m map[string]vertex
+
+func moretype19() {
+	m = make(map[string]vertex)
+	m["Bell Labs"] = vertex{
+		40.648433, -74.39967,
+	}
+	fmt.Println(m["Bell Labs"])
+}

roihan/moretypes_2.go

@@ -0,0 +1,12 @@
+package roihan
+
+import "fmt"
+
+type Vertex struct {
+	X int
+	Y int
+}
+
+func moretype2() {
+	fmt.Println(Vertex{1, 20})
+}

roihan/moretypes_20.go

@@ -0,0 +1,20 @@
+package roihan
+
+import "fmt"
+
+type Verte struct {
+	Lat, Long float64
+}
+
+var ma = map[string]Verte{
+	"Bell Labs": Verte{
+		40.648433, -74.39967,
+	},
+	"Google": Verte{
+		37.42202, -122.08408,
+	},
+}
+
+func moretype20() {
+	fmt.Println(ma)
+}

roihan/moretypes_21.go

@@ -0,0 +1,16 @@
+package roihan
+
+import "fmt"
+
+type literals struct {
+	Lat, Long float64
+}
+
+var mp = map[string]literals{
+	"Bell Labs": {40.68433, -74.39967},
+	"Google":    {37.42202, -122.08408},
+}
+
+func moretype21() {
+	fmt.Println(mp)
+}

roihan/moretypes_22.go

@@ -0,0 +1,19 @@
+package roihan
+
+import "fmt"
+
+func moretype22() {
+	m := make(map[string]int)
+
+	m["Answer"] = 42
+	fmt.Println("The value:", m["Answer"])
+
+	m["Answer"] = 48
+	fmt.Println("The value:", m["Answer"])
+
+	delete(m, "Answer")
+	fmt.Println("The value:", m["Answer"])
+
+	v, ok := m["Answer"]
+	fmt.Println("The value:", v, "Present?", ok)
+}

roihan/moretypes_23.go

@@ -0,0 +1,11 @@
+package roihan
+
+import "golang.org/x/tour/wc"
+
+func WordCount(s string) map[string]int {
+	return map[string]int{"x": 1}
+}
+
+func moretype23() {
+	wc.Test(WordCount)
+}

roihan/moretypes_24.go

@@ -0,0 +1,20 @@
+package roihan
+
+import (
+	"fmt"
+	"math"
+)
+
+func compute(fn func(float64, float64) float64) float64 {
+	return fn(3, 4)
+}
+
+func moretype24() {
+	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))
+}

roihan/moretypes_3.go

@@ -0,0 +1,14 @@
+package roihan
+
+import "fmt"
+
+type moretype struct {
+	X int
+	Y int
+}
+
+func moretype3() {
+	v := Vertex{1, 2}
+	v.X = 4
+	fmt.Println(v.X)
+}

roihan/moretypes_4.go

@@ -0,0 +1,15 @@
+package roihan
+
+import "fmt"
+
+type Moretype struct {
+	X int
+	Y int
+}
+
+func moretype4() {
+	v := Moretype{1, 2}
+	p := &v
+	p.X = 1e9
+	fmt.Println(v)
+}

roihan/moretypes_5.go

@@ -0,0 +1,18 @@
+package roihan
+
+import "fmt"
+
+type MoretypeVertex struct {
+	X, Y int
+}
+
+var (
+	v1 = MoretypeVertex{1, 2}  //Has type vertex
+	v2 = MoretypeVertex{X: 1}  //Y:0 is implicit
+	v3 = MoretypeVertex{}      //X:0 and Y:0
+	p  = &MoretypeVertex{1, 2} //Has type *Vertex
+)
+
+func moretype5() {
+	fmt.Println(v1, p, v2, v3)
+}

roihan/moretypes_6.go

@@ -0,0 +1,14 @@
+package roihan
+
+import "fmt"
+
+func moretype6() {
+	var a [2]string
+	a[0] = "Hello"
+	a[1] = "World"
+	fmt.Println(a[0], a[1])
+	fmt.Println(a)
+
+	primes := [6]int{2, 3, 5, 11, 13}
+	fmt.Println(primes)
+}

roihan/moretypes_7.go

@@ -0,0 +1,10 @@
+package roihan
+
+import "fmt"
+
+func moretype7() {
+	primes := [6]int{2, 3, 5, 7, 11, 13}
+
+	var s []int = primes[1:4]
+	fmt.Println(s)
+}

roihan/moretypes_8.go

@@ -0,0 +1,21 @@
+package roihan
+
+import "fmt"
+
+func moretype8() {
+	names := [3]string{
+		"Roihan",
+		"Mishbahul",
+		"Anam",
+	}
+
+	fmt.Println(names)
+
+	a := names[0:2]
+	b := names[1:3]
+	fmt.Println(a, b)
+
+	b[0] = "XXX"
+	fmt.Println(a, b)
+	fmt.Println(names)
+}