func main() {
var Book1 Books /* Declare Book1 of type Book */
var Book2 Books /* Declare Book2 of type Book */
/* book 1 specification */
Book1.title = "Go Programming"
Book1.author = "Mahesh Kumar"
Book1.subject = "Go Programming Tutorial"
Book1.book_id = 6495407
/* book 2 specification */
Book2.title = "Telecom Billing"
Book2.author = "Zara Ali"
Book2.subject = "Telecom Billing Tutorial"
Book2.book_id = 6495700
/* print Book1 info */
fmt.printf("Book 1 title : %s\n", Book1.title)
fmt.printf("Book 1 author : %s\n", Book1.author)
fmt.printf("Book 1 subject : %s\n", Book1.subject)
fmt.printf("Book 1 book_id : %d\n", Book1.book_id)
/* print Book2 info */
fmt.printf("Book 2 title : %s\n", Book2.title)
fmt.printf("Book 2 author : %s\n", Book2.author)
fmt.printf("Book 2 subject : %s\n", Book2.subject)
fmt.printf("Book 2 book_id : %d\n", Book2.book_id)
}
func (c *controller) createRequest(method string, url string, body []byte) (*http.Request, error) {
req, err := http.NewRequest(method, url, bytes.NewBuffer(body))
if err != nil {
fmt.printf("Unable to create request method=%s url=%s body=%s error=%s\n", method, url, body, err.Error())
os.Exit(1)
}
fmt.Printf("Req created: %s : %s\n\n", req.Method, req.URL)
return req, nil
}
func main() {
//使用make创建切片len=3,cap=6
var slice1 = make([]int, 3, 6)
//使用append给切片增加元素且未超出cap
slice2 := append(slice1, 1, 2, 3)
//使用append给切片增加元素并且超出cap
slice3 := append(slice1, 1, 2, 3, 4)
fmt.Printf("len=%d cap=%d %v\n", len(slice1), cap(slice1), slice1)
fmt.Printf("len=%d cap=%d %v\n", len(slice2), cap(slice2), slice2)
fmt.printf("len=%d cap=%d %v\n", len(slice3), cap(slice3), slice3)
}
func main() {
fmt.printf("hello, world\n")
}
func printBook(book *Books) {
fmt.printf("Book title : %s\n", book.title)
fmt.printf("Book author : %s\n", book.author)
fmt.printf("Book subject : %s\n", book.subject)
fmt.printf("Book book_id : %d\n", book.book_id)
}
func (d *commandSyncDb)Run() error {
var drops []string
if d.force {
drops = getDbDropSql(d.al)
}
db:=d.al.DB
if d.force {
for i,mi :=range modelCache.allordered(){
query :=drops[i]
if !d.noInfo {
fmt.Printf("drop table `%s` \n",mi.table)
}
_,err:=db.Exec(query)
if !d.noInfo {
fmt.Printf("%s\n",err.Error())
}
}
}
sqls ,indexs :=getDbCreateSql(d.al)
tables, err: = d.al.DbBaser.GetTables(db)
if err != nil {
if d.rtOnError {
return err
}
fmt.printf("%s\n",err.Error())
}
for _,fi :=range fields{
query :=getColumnAddQuery (d.al,fi)
if !d.noInfo {
fmt.Printf("add column `%s`for table `%s` \n",fi.fullName,mi.table)
}
_,err :=dbExec(query)
if err !=nil {
if d.rtOnError{
return err
}
fmt.Printf("%s\n",err.Error())
}
}
for _, idx :range indexes[mi.table] {
if d.al.DbBaser.IndexExists(db,idx.Table,idx.Name) ==false {
if !d.noInfo{
fmt.Printf("create index `%s` for table `%s` \n",idx.Name,idx.Table)
}
query :=idx.Sql
_,err :=db.Exec(query)
if d.verbose {
fmt.Printf("%s\n",query)
}
if err!=nil {
if d.rtOnError {
return err
}
fmt.Printf("",err.Error())
}
}
}
continue
}