- Land of Lisp
- Acknowledgments
- Introduction
- I. Lisp is Power
- 1. Getting Started with Lisp
- 2. Creating Your First Lisp Program
- 3. Exploring the Syntax of Lisp Code
- II. Lisp is Symmetry
- 4. Making Decisions with Conditions
- 5. Building a Text Game Engine
- 6. Interacting with the World: Reading and Printing in Lisp
- 6.5. lambda: A Function So Important It Deserves Its Own Chapter
- 7. Going Beyond Basic Lists
- 8. This Ain't Your Daddy's Wumpus
- 9. Advanced Datatypes and Generic Programming
- III. Lisp is Hacking
- 10. Looping with the loop Command
- 11. Printing Text with the format Function
- Anatomy of the format Function
- Control Sequences for Printing Lisp Values
- Control Sequences for Formatting Numbers
- Printing Multiple Lines of Output
- Justifying Output
- Iterating Through Lists Using Control Sequences
- A Crazy Formatting Trick for Creating Pretty Tables of Data
- Attack of the Robots!
- What You've Learned
- 12. Working with Streams
- 13. Let's Create a Web Server!
- 13.5. Functional Programming Is Beautiful
- IV. Lisp is Science
- 14. Ramping Lisp Up a Notch with Functional Programming
- 15. Dice of Doom, a Game Written in the Functional Style
- The Rules of Dice of Doom
- A Sample Game of Dice of Doom
- Implementing Dice of Doom, Version 1
- Defining Some Global Variables
- Representing the Game Board
- Decoupling Dice of Doom's Rules from the Rest of the Game
- Generating a Game Tree
- Calculating Passing Moves
- Calculating Attacking Moves
- Finding the Neighbors
- Attacking
- Reinforcements
- Trying Out Our New game-tree Function
- Playing Dice of Doom Against Another Human
- Creating an Intelligent Computer Opponent
- Making Dice of Doom Faster
- What You've Learned
- 16. The Magic of Lisp Macros
- 17. Domain-Specific Languages
- 18. Lazy Programming
- 19. Creating a Graphical, Web-Based Version of Dice of Doom
- 20. Making Dice of Doom More Fun
- A. Epilogue
- Index
- About the Author
- Updates
In this chapter, we created a custom REPL to supercharge our text adventure game. Along the way, you learned the following:
The
printandreadfunctions let you directly communicate with the user through the console. These two functions work in a computer-friendly way.Other input/output functions are not as elegant as
readandprint, but are friendlier for interacting with humans. Examples includeprincandread-line.A homoiconic programming language stores its program code and program data in a similar format. Lisp’s quoting, quasiquoting,
eval, and macro features make it extremely homoiconic.It’s easy to write your own custom REPL.
It’s simple to transform your internal Lisp data into the format most suitable for your program’s interface. This makes it easy to separate presentation details from your program’s internal data structures.
-
No Comment