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First solution in Clear category for Moore Neighbourhood by jollyca
NEIGHBOUR_COORDS = ((-1,-1),(-1,0), (-1,1),
(0, -1),(0, 1),
(1, -1),(1, 0), (1, 1))
def count_neighbours(grid, row, col):
cnt=0
transposed = list(map(list,zip(*grid)))
for c in NEIGHBOUR_COORDS:
x,y = row + c[0], col + c[1]
if x in range(len(transposed[0])) and y in range(len(grid[0])):
cnt+=grid[x][y]
return cnt
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert count_neighbours(((1, 0, 0, 1, 0),
(0, 1, 0, 0, 0),
(0, 0, 1, 0, 1),
(1, 0, 0, 0, 0),
(0, 0, 1, 0, 0),), 1, 2) == 3, "1st example"
assert count_neighbours(((1, 0, 0, 1, 0),
(0, 1, 0, 0, 0),
(0, 0, 1, 0, 1),
(1, 0, 0, 0, 0),
(0, 0, 1, 0, 0),), 0, 0) == 1, "2nd example"
assert count_neighbours(((1, 1, 1),
(1, 1, 1),
(1, 1, 1),), 0, 2) == 3, "Dense corner"
assert count_neighbours(((0, 0, 0),
(0, 1, 0),
(0, 0, 0),), 1, 1) == 0, "Single"
Feb. 22, 2015
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