Adds checking existence into a map eg

Author: hegdeashwin

codes/ch5_maps/check-existence-into-map.go

@@ -0,0 +1,38 @@
+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 {
+		delete(prefixMap, "Saju")
+	}
+
+	/**
+	 * Check if the value exist into the map or not.
+	 */
+	if _, exists := prefixMap[name]; exists {
+		return prefixMap[name]
+	} else {
+		return "dude"
+	}
+
+}
+
+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))
+
+}