Add a program which run func only once regardless of subsequent calls

iamniting · Jun 8, 2023 · 0535245 · 0535245
1 parent 1a6907e
commit 0535245
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/goConcepts/sync-once.go b/goConcepts/sync-once.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+func main() {
+
+	var once sync.Once
+
+	printHiHello(&once)
+	printHiHello(&once)
+	printHiHello(&once)
+}
+
+func printHiHello(once *sync.Once) {
+
+	// The "Hi" is printed only once, and "Hello" is printed for each call to printHiHello
+	once.Do(func() {
+		fmt.Println("Hi")
+	})
+	fmt.Println("Hello")
+}