Later you do explain the c leaves the order unchanged but I think there should also be a comment about this in the function definition itself.
Also in the example application where ordering_function = var do nearly all readers know that 'var' is the variance function? If not another comment would help.
Later you do explain the c leaves the order unchanged but I think there should also be a comment about this in the function definition itself.
Also in the example application where ordering_function = var do nearly all readers know that 'var' is the variance function? If not another comment would help.