Sha256: 540ed8567dcca3f19f942e6a4a80027eaed5128b7f475bcdb1e6b5bb12173b7c
Contents?: true
Size: 1.65 KB
Versions: 108
Compression:
Stored size: 1.65 KB
Contents
class Board
VALID_BORDERS = ['+', '-', '|']
VALID_DATA = ['*', '|', '+', '-', ' ']
def self.transform(input)
new(input).transform
end
def initialize(raw_board)
@rows = raw_board
validate
end
def transform
rows.map.with_index do |row, i|
decorate_row(row, i)
end
end
def mine?(char)
char == '*'
end
private
attr_reader :rows
def decorate_row(row, i)
inner = []
row.each_char.with_index do |space, j|
if space != ' '
inner << space
else
surroundings = surroundings(row, i, j)
k = count_mines_nearby(surroundings)
if k > 0
inner << k.to_s
else
inner << space
end
end
end
inner.join
end
def surroundings(row, i, j)
[
row[j - 1], row[j + 1], rows[i - 1][j - 1],
rows[i - 1][j], rows[i - 1][j + 1],
rows[i + 1][j - 1], rows[i + 1][j], rows[i + 1][j + 1]
]
end
def count_mines_nearby(surroundings)
surroundings.count { |datum| mine?(datum) }
end
def validate
validate_size
validate_borders
validate_data
end
def validate_size
len = rows.first.length
if rows.any? { |row| row.length != len }
fail ArgumentError, 'Invalid board'
end
end
def validate_borders
[rows[0], rows[-1]].each do |row|
invalid = row.chars.any? do |char|
!VALID_BORDERS.include?(char)
end
fail ArgumentError, 'Invalid board' if invalid
end
end
def validate_data
rows.each do |row|
invalid = row.chars.any? do |char|
!VALID_DATA.include?(char)
end
fail ArgumentError, 'Invalid board' if invalid
end
end
end
Version data entries
108 entries across 108 versions & 1 rubygems