Functional Zork

In this game, there is a single character that moves around in a world. In this world, the player is able to examine the current location, move between locations, pickup objects, and drop objects. The list of commands are as follows:

• Walk: This moves from one location to another

• Look: This views the current location

• Pickup: This picks up an object

• Drop: This drops an object

• Inventory: This sees what the player is holding

• Directions: This determines the possible directions from the current location

Most commands have synonyms to make it easy to enter commands. These will be detailed as they occur and are quite easy to add or remove. A variation of the command pattern as developed in Chapter 7, Supporting Design Patterns Using Functional Programming is incorporated. As we will see, a Map class and lambda expressions are used to eliminate the need for individual command classes.

The world is made up of a series of locations. Each location has a name, a description, can hold items...