add: map exercises and quiz

22-maps/exercises/01-warm-up/main.go

@@ -0,0 +1,38 @@
+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Warm-up
+//
+//  Create and print the following maps.
+//
+//  1. Phone numbers by last name
+//  2. Product availability by Product ID
+//  3. Multiple phone numbers by last name
+//  4. Shopping basket by Customer ID
+//
+//     Each item in the shopping basket has a Product ID and
+//     quantity. Through the map, you can tell:
+//     "Mr. X has bought Y bananas"
+//
+// ---------------------------------------------------------
+
+func main() {
+	// Hint: Store phone numbers as text
+
+	// #1
+	// Key        : Last name
+	// Element    : Last name
+
+	// #2
+	// Key        : Product ID
+	// Element    : Available / Unavailable
+
+	// #3
+	// Key        : Last name
+	// Element    : Phone numbers
+
+	// #4
+	// Key        : Customer ID
+	// Element Key:
+	//   Key: Product ID Element: Quantity
+}