Class: Namero::Board

Inherits:
Object
  • Object
show all
Defined in:
lib/namero/board.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(n:, values: Array.new(n**2)) ⇒ Board

n: Integer values: Array<Integer>

Raises:

  • (ArgumentError) 


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# File 'lib/namero/board.rb', line 7

def initialize(n:, values: Array.new(n**2))
  raise ArgumentError if values.size != n**2
  @n = n
  @values = values
end

Instance Attribute Details

#n ⇒ Object (readonly)

Returns the value of attribute n.



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# File 'lib/namero/board.rb', line 3

def n
  @n
end

Instance Method Details

#[](idx, type = :index) ⇒ Object 



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# File 'lib/namero/board.rb', line 48

def [](idx, type = :index)
  case type
  when :index
    @values[idx]
  when :row
    start = (idx / n ) * n
    @values[start...start+@n]
  when :column
    x = idx % n
    @values.each_slice(n).map{|row| row[x]}
  when :block
    x = idx % n
    y = idx / n
    start_x = x / root_n * root_n
    start_y = y / root_n * root_n

    [].tap do |res|
      root_n.times do |y_offset|
        root_n.times do |x_offset|
          
          res << self[start_x + x_offset + (start_y + y_offset) * n]
        end
      end
    end
  else
    raise "Unknown type: #{type}"
  end
end

#[]=(idx, type = :index, value) ⇒ Object

x, y: 0 based index type: :single, :row, :column, :block, :index



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# File 'lib/namero/board.rb', line 15

def []=(idx, type = :index, value)
  case type
  when :index
    @values[idx] = value
  when :row
    start = (idx / n) * n
    n.times do |i|
      @values[start+i] = value[i]
    end
  when :column
    x = idx % n
    n.times do |i|
      @values[i * n + x] = value[i]
    end
  when :block
    x = idx % n
    y = idx / n
    start_x = x / root_n * root_n
    start_y = y / root_n * root_n

    value_idx = 0
    root_n.times do |y_offset|
      root_n.times do |x_offset|

        self[start_x + x_offset + (start_y + y_offset) * n] = value[value_idx]
        value_idx += 1
      end
    end
  else
    raise "Unknown type: #{type}"
  end
end

#complete? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/namero/board.rb', line 89

def complete?
  @values.all? do |v|
    v.value
  end
end

#dup ⇒ Object 



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# File 'lib/namero/board.rb', line 77

def dup
  values = @values.map(&:dup)
  Board.new(n: @n, values: values)
end

#each_values ⇒ Object 



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# File 'lib/namero/board.rb', line 82

def each_values
  return enum_for(__method__) unless block_given?
  @values.each do |value|
    yield value
  end
end