Class: Kudo::Operator

Inherits:
Object
  • Object
show all
Defined in:
lib/kudo/operator.rb

Class Method Summary collapse

Class Method Details

.get_column(sudoku, j) ⇒ Object 



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# File 'lib/kudo/operator.rb', line 20

def get_column(sudoku, j)
  sudoku.map { |row| row[j] }
end

.get_empty_cells(sudoku) ⇒ Object 



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# File 'lib/kudo/operator.rb', line 5

def get_empty_cells(sudoku)
  empty_cells = []
  9.times do |i|
    9.times do |j|
      empty_cells.append([i, j]) if sudoku[i][j].zero?
    end
  end

  empty_cells
end

.get_row(sudoku, i) ⇒ Object 



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# File 'lib/kudo/operator.rb', line 16

def get_row(sudoku, i)
  sudoku[i]
end

.get_subgrid(sudoku, i, j) ⇒ Object 



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# File 'lib/kudo/operator.rb', line 24

def get_subgrid(sudoku, i, j)
  row = i / 3 * 3
  col = j / 3 * 3
  subgrid = []
  (row..row + 2).each do |r|
    (col..col + 2).each do |c|
      subgrid << sudoku[r][c]
    end
  end
  subgrid
end