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Writing a Befunge Interpreter
A high-level outline of how a Befunge interpreter is put together: loading the grid, the main loop, the stack and the instruction pointer, with a small sketch.
Design and Puzzles
Interpreters and Puzzles
Building interpreters and solving programming puzzles.
Code Golf Explained
Code golf is the puzzle of solving a task in as few characters as possible. Learn how it works, how entries are judged, and why odd languages thrive in it.
Debugging Grid Programs
Practical ways to debug code that runs in two dimensions: trace the pointer path, watch the stack, mark cells, and shrink a failing program until the bug shows.
Programming Puzzles With Unusual Constraints
A survey of puzzles that restrict the language, the character set or the code layout, with ideas for how to approach each kind and why constraints spark creativity.
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