Series
Slice Empty a slice a := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10} a = a[:0] // or a = nil Prepend b := []int{2, 3, 4} b = append([]int{1}, b...) Remove a = append(a[:i], a[i+1:]...) Insert at index s = append(s, 0) copy(s[i+1:], s[i:]) s[i] = x Index...
Env Functions to operate environment variables: os.Getenv: get env variable by name, if not set, return empty string os.LookupEnv: return (value, exists) os.Setenv: set env variable value os.Unsetenv: Unset env variable Sample code: package main i...
Flag package main import ( "flag" "fmt" ) func main() { count := flag.Int("count", 0, "run time count") prefix := flag.String("prefix", "", "install path") dryrun := flag.Bool("dryrun", true, "dry run program") flag.Parse()...
String to Number Atoi k, _ := strconv.Atoi("135") // k = 135 n, e := strconv.Atoi("wat") // n = 0, e is not nil ParseInt i, _ := strconv.ParseInt("123", 10, 64) // i = 123 d1, _ := strconv.ParseInt("0x1c8", 0, 64) // d1 = 456 d2, _ := strconv.Parse...
Get User Input from Stdin Scanln & Scanf var name string fmt.Scanln(&name) // this will scan only one string token (if there is a space in your string) var age int fmt.Scanf("%d\n", &age) bufio.NewScanner sc := bufio.NewScanner(os.Stdin) sc.Scan()...
base64,32,58 encoding base64 Standard Encoding/Decoding import ( "encoding/base64" "fmt" ) func main() { data := []byte("test data") b64Enc := base64.StdEncoding.EncodeToString([]byte(data)) fmt.Println("B64 Encoded:", b64Enc) ...