type A struct {
Id string `db:"id" json:"id" valid:"uuidv4"`
Target string `db:"target" json:"target" valid:"uuidv4"`
}
type B struct {
Id string `db:"id" json:"id" valid:"uuidv4"`
Type int `db:"type" json:"type" valid:"-"`
SomeFieldName A `json:"A"`
}
var u []*user используйте users := make([]*user, 0, 100000)
func RegisterUser(name string, surname string, age int)type User struct {
Name string
Surname string
Age int
}
func RegisterUser(user User)In a case or default clause, the last non-empty statement may be a (possibly labeled) "fallthrough" statement to indicate that control should flow from the end of this clause to the first statement of the next clause
for _, field := range fields {
if field.Name() == "fields" {
if field, ok := field.Value().(ExtField); ok {
res[field.Key] = field.Text
}
}
}package main
import (
"io"
"os"
"os/exec"
"strings"
)
func main() {
resulution := "640x480" // Разрешение видео
framerate := "1" // Частота кадров, здесб нам достаточно 1 кадр в секунду
outfile := "out.webm" // Файл, в который писать, расширение задаст его формат
color1 := "0xFF0000" // RGB (255,0,0)
color2 := "0x00FF00" // RGB (0,255,0)
color3 := "0x0000FF" // RGB (0,0,255)
//////////////////////////////
filtergraph := []string{
"color=c=" + color1 + ":size=" + resulution + ":duration=3:s=qcif:r=" + framerate + " [v1]",
"color=c=" + color2 + ":size=" + resulution + ":duration=3:s=qcif:r=" + framerate + " [v2]",
"color=c=" + color3 + ":size=" + resulution + ":duration=3:s=qcif:r=" + framerate + " [v3]",
`[v1] [v2] [v3] concat=n=3 [v]`,
}
allOptions := []string{
"-filter_complex", strings.Join(filtergraph, ";"),
"-map", "[v]",
"-threads", "0", "-y", outfile,
}
RunCmd("ffmpeg", allOptions...)
}
func ReadAndPrint(r io.Reader) {
io.Copy(os.Stdout, r)
}
func RunCmd(name string, args ...string) {
cmd := exec.Command(name, args...)
stdout, err := cmd.StdoutPipe()
if err != nil {
panic(err)
}
stderr, err := cmd.StderrPipe()
if err != nil {
panic(err)
}
go ReadAndPrint(stdout)
go ReadAndPrint(stderr)
err = cmd.Run()
if err != nil {
panic(err)
}
}tmpl, _ := template.ParseFiles("")
func GetMaxPoints(db *sql.DB) (int64, error) {
rows, err := db.Query(`SELECT MAX(points) FROM items`)
if err != nil {
return 0, err
}
defer rows.Close()
rows.Next()
var maxPoints int64
err = rows.Scan(&maxPoints)
return maxPoints, err
}package main
import (
"encoding/json"
"fmt"
)
type Data1 struct {
SomeField string `json:"some_field"`
}
type Data2 struct {
SomeOtherField string `json:"some_other_field"`
}
type DefaultResponse struct {
Code int `json:"code"`
Msg string `json:"msg"`
}
type Response1 struct {
DefaultResponse
Datas []Data1 `json:"datas"`
}
type Response2 struct {
DefaultResponse
Datas []Data2 `json:"datas"`
}
func main() {
json1 := `{"code":123,"msg":"test","datas":[{"some_field":"test field data"}]}`
json2 := `{"code":456,"msg":"test2","datas":[{"some_other_field":"other test field data"}]}`
var res1 Response1
var res2 Response2
json.Unmarshal([]byte(json1), &res1)
json.Unmarshal([]byte(json2), &res2)
fmt.Printf("%+v\n", res1)
fmt.Printf("%+v\n", res2)
}