make -hgo mod init github.com/ahmed82/go-makefilego run main.go mutex.go
or
go run .var (
mutex sync.Mutex
balance int
)
func withdraw(value int, wg *sync.WaitGroup) {
mutex.Lock()
fmt.Printf("Withdrawing %d to account with balance %d\n ", value, balance)
balance -= value
mutex.Unlock()
wg.Done()
}
func deposit(value int, wg *sync.WaitGroup) {
mutex.Lock()
fmt.Printf("Depositing %d to account with balance %d\n ", value, balance)
balance += value
mutex.Unlock()
wg.Done()
}
func main() {
fmt.Println("Mutext")
balance = 1000
var wg sync.WaitGroup
wg.Add(2)
go withdraw(700, &wg)
go deposit(500, &wg)
wg.Wait()
fmt.Printf(" New balance %d\n", balance)
}func main() {
one := make(chan string)
two := make(chan string)
quit := make(chan string)
go func() {
time.Sleep(2 * time.Second)
one <- "Hey From Channel One"
}()
go func() {
time.Sleep(3 * time.Second)
two <- "Hello From Channel Two"
}()
select {
case res1 := <-one:
fmt.Println("I get from channel One!", res1)
case res2 := <-two:
fmt.Println("I get from channel Two!", res2)
// if any value has been pushed to the quit channel then it is true for this case
// amd it will quit the select by running the return
case <-quit:
return
}
}