-
Notifications
You must be signed in to change notification settings - Fork 0
/
playground.go
134 lines (111 loc) · 1.94 KB
/
playground.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
package main
import "fmt"
func main() {
var x = [3]int{10, 20, 30}
var y = [12]int{1, 5: 4, 6, 10: 100, 15}
var z = [...]int{10, 20, 30}
var i = [...]int{1, 2, 3}
var j = [3]int{1, 2, 3}
fmt.Println(x)
fmt.Println(y)
fmt.Println(z)
fmt.Println(i == j)
var k [2][3]int
fmt.Println(k)
fmt.Println()
}
func slice() {
var x = []int{1, 2, 3}
x = append(x, 4)
x = append(x, 5, 6, 7)
y := []int{20, 30, 40}
x = append(x, y...)
}
func make() {
// x := make([]int, 0, 10)
// x = append(x, 5, 6, 7, 8)
}
func cuttingSlice() {
x := []int{1, 2, 3, 4}
y := x[:2]
z := x[1:]
d := x[1:3]
e := x[:]
fmt.Println("x:", x)
fmt.Println("y:", y)
fmt.Println("z:", z)
fmt.Println("d:", d)
fmt.Println("e:", e)
}
func copy() {
x := []int{1, 2, 3, 4}
y := make([]int, 4)
num := copy(y, x)
fmt.Println(y, num)
}
func mapFunc() {
// var nilMap map[string]int
totalWinss := map[string]int{}
teams := map[string][]string{
"Orcas": []string{"Fred", "Ralph", "Bijou"},
"Lions": []string{"Sarah", "Peter", "Billie"},
}
ages := make(map[int][]string, 10)
}
func okMap() {
m := map[string]int{
"hello": 5,
"world": 0,
}
v, ok := m["hello"]
fmt.Println(v, ok)
k, ok := m["goodbye"]
fmt.Println(k, ok)
delete(m, "hello")
}
func set() {
intSet := map[int]bool{}
vals := []int{5, 10, 2, 5, 8, 7, 3, 9, 1, 2, 10}
for _, v := range vals {
intSet[v] = true
}
fmt.Println(len(vals), len(intSet))
fmt.Println(intSet[5])
fmt.Println(intSet[500])
if intSet[100] {
fmt.Println("100 is in the set")
}
}
func structTest() {
type person struct {
name string
age int
pet string
}
var fred person
bob := person{}
julia := person{
"Julia",
40,
"cat",
}
bob.name = "Bob"
fmt.Println(julia.name)
}
func anonymousStruct() {
var person struct {
name string
age int
pet string
}
person.name = "bob"
person.age = 50
person.pet = "dog"
pet := struct {
name string
kind string
}{
name: "Fido",
kind: "dog",
}
}