Coding

# Minesweeper Kata

· 2min

I did the minesweeper kata a few days back. It was a bit too easy, though it’s quite possible that this is more an artifact of how I approached it. Given that it’s a simple one, it might be an idea to see if I can take it in smaller steps, much smaller steps.

There’s not really much to say, so here’s the code:

```#!/usr/bin/env python

import doctest
import sys

def unpack_line(s):
"""
>>> unpack_line('.....')
[0, 0, 0, 0, 0]
>>> unpack_line('')
[]
>>> unpack_line('.*.')
[0, '*', 0]
"""
line = []
for c in s:
if c == '*':
line.append('*')
else:
line.append(0)
return line

"""
[[0, 0], [0, 0]]
[['*', 1], [1, 1]]
[['*', 2], [2, '*']]
>>> mark_adjacents([[0, 0, 0], [0, '*', 0], [0, 0, 0]])
[[1, 1, 1], [1, '*', 1], [1, 1, 1]]
>>> mark_adjacents([['*', 0, 0], [0, 0, 0], [0, 0, '*']])
[['*', 1, 0], [1, 2, 1], [0, 1, '*']]
"""
for y in range(len(lines)):
for x in range(len(lines[y])):
if lines[y][x] == '*':
for oy in [y - 1, y, y + 1]:
if oy < 0 or oy == len(lines):
continue
for ox in [x - 1, x, x + 1]:
if ox < 0 or ox == len(lines[y]):
continue
if lines[oy][ox] != '*':
lines[oy][ox] += 1
return lines

def process_fields(iterable):
start = True
for line in iterable:
line = line.rstrip()
if start:
start = False
lines = []
height, width = [int(x) for x in line.split(' ')]
if width == 0 and height == 0:
break
else:
lines.append(unpack_line(line))
height -= 1
if height == 0:
start = True

def main():
field = 0
for f in process_fields(sys.stdin):
field += 1
if field > 1:
print
print "Field #%d:" % field
for l in f:
print ''.join([str(x) for x in l])

def _test():
doctest.testmod()

if __name__ == '__main__':
main()
```

I should really buckle down and finish the code that’s meant to replace the crappy one-evening hack the this blog runs on.