*scratch*

ruby-1.9.2-p290 :019 > a.course_points
 => [{"x"=>-123.09956999999997, "y"=>43.99689, "t"=>"Left", "n"=>"Skarpt til venstre og inn på Willamette St", "d"=>1558.2270196996717, "i"=>45}, {"x"=>-123.09476000000001, "y"=>44.00251, "t"=>"Right", "n"=>"Sving til høyre og inn på Coachman Dr", "d"=>2319.6279202483624, "i"=>-1}, {"x"=>-123.0924, "y"=>44.00288, "t"=>"Right", "n"=>"Ta til høyre mot E 49th Ave", "d"=>2561.46875989974, "i"=>89}, {"x"=>-123.09163999999998, "y"=>44.00336, "t"=>"Right", "n"=>"Sving til høyre og inn på E 49th Ave", "d"=>2642.4525533428578, "i"=>92}, {"x"=>-123.08988999999997, "y"=>44.00312, "t"=>"Right", "n"=>"Sving til høyre og inn på Donald St", "d"=>2791.013780653592, "i"=>100}, {"x"=>-123.09055999999998, "y"=>44.00058000000001, "t"=>"Right", "n"=>"Sving til høyre og inn på Ventura Ave", "d"=>3084.1878589167495, "i"=>116}] 
ruby-1.9.2-p290 :020 > new_cps = a.course_points.map{|cp| new_cp = cp.clone ; new_cp['n'] = 'probably gotta clone otherwise it modifies the original too'; new_cp} => [{"x"=>-123.09956999999997, "y"=>43.99689, "t"=>"Left", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>1558.2270196996717, "i"=>45}, {"x"=>-123.09476000000001, "y"=>44.00251, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2319.6279202483624, "i"=>-1}, {"x"=>-123.0924, "y"=>44.00288, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2561.46875989974, "i"=>89}, {"x"=>-123.09163999999998, "y"=>44.00336, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2642.4525533428578, "i"=>92}, {"x"=>-123.08988999999997, "y"=>44.00312, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2791.013780653592, "i"=>100}, {"x"=>-123.09055999999998, "y"=>44.00058000000001, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>3084.1878589167495, "i"=>116}] 
ruby-1.9.2-p290 :021 > a.course_points
 => [{"x"=>-123.09956999999997, "y"=>43.99689, "t"=>"Left", "n"=>"Skarpt til venstre og inn på Willamette St", "d"=>1558.2270196996717, "i"=>45}, {"x"=>-123.09476000000001, "y"=>44.00251, "t"=>"Right", "n"=>"Sving til høyre og inn på Coachman Dr", "d"=>2319.6279202483624, "i"=>-1}, {"x"=>-123.0924, "y"=>44.00288, "t"=>"Right", "n"=>"Ta til høyre mot E 49th Ave", "d"=>2561.46875989974, "i"=>89}, {"x"=>-123.09163999999998, "y"=>44.00336, "t"=>"Right", "n"=>"Sving til høyre og inn på E 49th Ave", "d"=>2642.4525533428578, "i"=>92}, {"x"=>-123.08988999999997, "y"=>44.00312, "t"=>"Right", "n"=>"Sving til høyre og inn på Donald St", "d"=>2791.013780653592, "i"=>100}, {"x"=>-123.09055999999998, "y"=>44.00058000000001, "t"=>"Right", "n"=>"Sving til høyre og inn på Ventura Ave", "d"=>3084.1878589167495, "i"=>116}] 
ruby-1.9.2-p290 :022 > a.course_points = new_cps
 => [{"x"=>-123.09956999999997, "y"=>43.99689, "t"=>"Left", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>1558.2270196996717, "i"=>45}, {"x"=>-123.09476000000001, "y"=>44.00251, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2319.6279202483624, "i"=>-1}, {"x"=>-123.0924, "y"=>44.00288, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2561.46875989974, "i"=>89}, {"x"=>-123.09163999999998, "y"=>44.00336, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2642.4525533428578, "i"=>92}, {"x"=>-123.08988999999997, "y"=>44.00312, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2791.013780653592, "i"=>100}, {"x"=>-123.09055999999998, "y"=>44.00058000000001, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>3084.1878589167495, "i"=>116}] 
ruby-1.9.2-p290 :023 > a.save
 => true 
ruby-1.9.2-p290 :024 > a.reload.course_points
 => [{"x"=>-123.09956999999997, "y"=>43.99689, "t"=>"Left", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>1558.2270196996717, "i"=>45}, {"x"=>-123.09476000000001, "y"=>44.00251, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2319.6279202483624, "i"=>-1}, {"x"=>-123.0924, "y"=>44.00288, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2561.46875989974, "i"=>89}, {"x"=>-123.09163999999998, "y"=>44.00336, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2642.4525533428578, "i"=>92}, {"x"=>-123.08988999999997, "y"=>44.00312, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>2791.013780653592, "i"=>100}, {"x"=>-123.09055999999998, "y"=>44.00058000000001, "t"=>"Right", "n"=>"probably gotta clone otherwise it modifies the original too", "d"=>3084.1878589167495, "i"=>116}]