update book code

eBook/examples/chapter_13/panic_recover.go

@@ -0,0 +1,32 @@
+// panic_recover.go
+package main
+
+import (
+	"fmt"
+)
+
+func badCall() {
+	panic("bad end")
+}
+
+func test() {
+	defer func() {
+		if e := recover(); e != nil {
+			fmt.Printf("Panicing %s\r\n", e)
+		}
+	}()
+	badCall()
+	fmt.Printf("After bad call\r\n") // <-- wordt niet bereikt
+}
+
+func main() {
+	fmt.Printf("Calling test\r\n")
+	test()
+	fmt.Printf("Test completed\r\n")
+}
+
+/* Output:
+Calling test
+Panicing bad end
+Test completed
+*/