Add Async{0-1} to be able to handle function with no return

README.md

@@ -1254,6 +1254,22 @@ ch := lo.Async(func() lo.Tuple2[int, error] {
 // chan lo.Tuple2[int, error] ({42, nil})
 ```
 
+### Async{0->1}
+
+Executes a function in a goroutine and returns the result in a channel.
+For function without return, the channel will be closed once the function finishes.
+
+```go
+ch := lo.Async0(func() { time.Sleep(10 * time.Second) })
+// chan struct{}
+
+ch := lo.Async1(func() int {
+  time.Sleep(10 * time.Second);
+  return 42
+})
+// chan int (42)
+```
+
 ### Must
 
 Wraps a function call to panics if second argument is `error` or `false`, returns the value otherwise.

concurrency.go

@@ -8,3 +8,18 @@ func Async[T any](f func() T) chan T {
 	}()
 	return ch
 }
+
+// Async0 executes a function in a goroutine and returns a channel closed after execution.
+func Async0(f func()) chan struct{} {
+	ch := make(chan struct{})
+	go func() {
+		f()
+		close(ch)
+	}()
+	return ch
+}
+
+// Async1 executes a function in a goroutine and returns the result in a channel.
+func Async1[A any](f func() A) chan A {
+	return Async(f)
+}

concurrency_test.go

@@ -26,3 +26,41 @@ func TestAsync(t *testing.T) {
 		is.Fail("Async should not block")
 	}
 }
+
+func TestAsyncX(t *testing.T) {
+	is := assert.New(t)
+
+	{
+		sync := make(chan struct{})
+
+		ch := Async0(func() {
+			<-sync
+		})
+
+		sync <- struct{}{}
+
+		select {
+		case <-ch:
+		case <-time.After(time.Millisecond):
+			is.Fail("Async0 should not block")
+		}
+	}
+
+	{
+		sync := make(chan struct{})
+
+		ch := Async1(func() int {
+			<-sync
+			return 10
+		})
+
+		sync <- struct{}{}
+
+		select {
+		case result := <-ch:
+			is.Equal(result, 10)
+		case <-time.After(time.Millisecond):
+			is.Fail("Async1 should not block")
+		}
+	}
+}