method

each_with_index

v1_9_2_180 - Show latest stable - Class: Matrix

each_with_index()

public

Yields all elements of the matrix, starting with those of the first row, along with the row index and column index, or returns an Enumerator is no block given

Matrix[ [1,2], [3,4] ].each_with_index do |e, row, col|
  puts "#{e} at #{row}, #{col}"
end
  # => 1 at 0, 0
  # => 2 at 0, 1
  # => 3 at 1, 0
  # => 4 at 1, 1

# File lib/matrix.rb, line 391
  def each_with_index(&block) # :yield: e, row, column
    return to_enum(:each_with_index) unless block_given?
    @rows.each_with_index do |row, row_index|
      row.each_with_index do |e, col_index|
        yield e, row_index, col_index
      end
    end
    self
  end

each_with_index

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