class Kudo::Operator
Public Class Methods
get_column(sudoku, j)
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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)
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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)
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# File lib/kudo/operator.rb, line 16 def get_row(sudoku, i) sudoku[i] end
get_subgrid(sudoku, i, j)
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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