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Exercise: Minesweeper in 100 lines of Ruby
Ruby is such an expressive language. You can often do surprisingly much with just a few lines of code. It’s why I find it so satisfying to think about how to accomplish the same thing in fewer lines of Ruby1. If we accept the claim that that number of bugs correlates with number of lines of code this is not just a fun exercise. There’s real business value in accomplishing a feature with less lines of code. ↩
The rest of the article walks through my implementation which landed on exactly 100 lines (counted by cloc in lib folder) by a happy accident. The Mine and Empty nested subclasses are why here I inherited from Data defined class, they’ll be needed outside this context. To print the board on the command line we’ll iterate over the grid, converting the cells to ASCII characters:
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