| case @face | |
| when 'N' | |
| @y += 1 | |
| when 'S' | |
| @y -= 1 | |
| when 'E' | |
| @x += 1 | |
| when 'W' | |
| @x -= 1 | |
| end |
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| case @face | |
| when 'N' | |
| @y += 1 | |
| when 'S' | |
| @y -= 1 | |
| when 'E' | |
| @x += 1 | |
| when 'W' | |
| @x -= 1 | |
| end |