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Go Snippets
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| i := 1 | |
| for i <= 3 { | |
| fmt.Println(i) | |
| i = i + 1 | |
| } | |
| for j := 7; j <= 9; j++ { | |
| fmt.Println(j) | |
| } | |
| for { | |
| fmt.Println("loop") | |
| break | |
| } | |
| for n := 0; n <= 5; n++ { | |
| if n%2 == 0 { | |
| continue | |
| } | |
| fmt.Println(n) | |
| } |
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| go list ./... | grep -v /vendor/ | xargs -L1 golint | wc -l |
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| m := make(map[string]int) | |
| m["k1"] = 7 | |
| m["k2"] = 13 | |
| fmt.Println("map:", m) | |
| v1 := m["k1"] | |
| fmt.Println("v1: ", v1) | |
| fmt.Println("len:", len(m)) | |
| delete(m, "k2") | |
| fmt.Println("map:", m) | |
| _, prs := m["k2"] | |
| fmt.Println("prs:", prs) | |
| n := map[string]int{"foo": 1, "bar": 2} | |
| fmt.Println("map:", n) |
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| nums := []int{2, 3, 4} | |
| sum := 0 | |
| for _, num := range nums { | |
| sum += num | |
| } | |
| fmt.Println("sum:", sum) | |
| for i, num := range nums { | |
| if num == 3 { | |
| fmt.Println("index:", i) | |
| } | |
| } | |
| kvs := map[string]string{"a": "apple", "b": "banana"} | |
| for k, v := range kvs { | |
| fmt.Printf("%s -> %s\n", k, v) | |
| } | |
| for k := range kvs { | |
| fmt.Println("key:", k) | |
| } | |
| for i, c := range "go" { | |
| fmt.Println(i, c) | |
| } |
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| s := make([]string, 3) | |
| fmt.Println("emp:", s) | |
| s[0] = "a" | |
| s[1] = "b" | |
| s[2] = "c" | |
| fmt.Println("set:", s) | |
| fmt.Println("get:", s[2]) | |
| fmt.Println("len:", len(s)) | |
| s = append(s, "d") | |
| s = append(s, "e", "f") | |
| fmt.Println("apd:", s) | |
| c := make([]string, len(s)) | |
| copy(c, s) | |
| fmt.Println("cpy:", c) | |
| l := s[2:5] | |
| fmt.Println("sl1:", l) | |
| l = s[:5] | |
| fmt.Println("sl2:", l) | |
| l = s[2:] | |
| fmt.Println("sl3:", l) | |
| t := []string{"g", "h", "i"} | |
| fmt.Println("dcl:", t) | |
| twoD := make([][]int, 3) | |
| for i := 0; i < 3; i++ { | |
| innerLen := i + 1 | |
| twoD[i] = make([]int, innerLen) | |
| for j := 0; j < innerLen; j++ { | |
| twoD[i][j] = i + j | |
| } | |
| } | |
| fmt.Println("2d: ", twoD) |
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| package main | |
| import "fmt" | |
| type person struct { | |
| name string | |
| age int | |
| } | |
| func newPerson(name string) *person { | |
| p := person{name: name} | |
| p.age = 42 | |
| return &p | |
| } | |
| func main() { | |
| fmt.Println(person{"Bob", 20}) | |
| fmt.Println(person{name: "Alice", age: 30}) | |
| fmt.Println(person{name: "Fred"}) | |
| fmt.Println(&person{name: "Ann", age: 40}) | |
| fmt.Println(newPerson("Jon")) | |
| s := person{name: "Sean", age: 50} | |
| fmt.Println(s.name) | |
| sp := &s | |
| fmt.Println(sp.age) | |
| sp.age = 51 | |
| fmt.Println(sp.age) | |
| } |
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