each2

# File lib/matrix.rb, line 1788
  def each2(v) # :yield: e1, e2
    raise TypeError, "Integer is not like Vector" if v.kind_of?(Integer)
    Vector.Raise ErrDimensionMismatch if size != v.size
    return to_enum(:each2, v) unless block_given?
    size.times do |i|
      yield @elements[i], v[i]
    end
    self
  end