In 3-mandatory-implement/2-cases.js, created a function to convert lower case to upper case and replace all space with underline

Author: TzeMingHo

Sprint-2/3-mandatory-implement/2-cases.js

@@ -14,3 +14,11 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+function toUpperSnakeCase(str) {
+  // return the string in UPPER_SNAKE_CASE
+  return str.toUpperCase().replaceAll(" ", "_");
+}
+
+console.log(toUpperSnakeCase("hello there")); // should return "HELLO_THERE"
+console.log(toUpperSnakeCase("lord of the rings")); // should return "LORD_OF_THE_RINGS"