Adds delete into a map eg

Author: hegdeashwin

codes/ch5_maps/delete-into-a-map.go

@@ -0,0 +1,39 @@
+package main
+
+import "fmt";
+
+func GetPrefix(name string, mustDel bool) (prefix string) {
+
+	/**
+	 * Short hand way to declare and initialize map
+	 */
+	prefixMap := map[string] string {
+		"Ashwin": "Sr. Fullstack Engineer",
+		"Kumar": "Sr. Engineering Manager",
+		"Saju": "Sr. Solution Architect",
+		"Ajay": "Sr. Solution Architect", // comma is needed here
+	}
+
+	if mustDel {
+		/**
+		 * Old way to perform delete operation on map.
+		 * Will no more work for new version of Go compiler
+		 */
+		// prefixMap["Saju"] = "", false
+
+		/**
+		 * New way to perform delete operation on map.
+		 */
+		delete(prefixMap, "Saju")
+	}
+	
+	return prefixMap[name]
+}
+
+func main() {
+
+	fmt.Println("What is Saju's role? He is " + GetPrefix("Saju", false))
+
+	fmt.Println("What is Saju's role? He is " + GetPrefix("Saju", true))
+
+}