Re: [RFC] User-defined object comparison

On Tue, Jun 26, 2018 at 5:50 PM Rudolf Theunissen <rudolf.theunissen@gmail.com> wrote: > > Hi everyone, > > This is an RFC that is based on previous discussions here: > https://externals.io/message/102337 > > RFC: https://wiki.php.net/rfc/object-comparison > > The implementation is tested and appears to be working as expected. :) I had some off-list contact with Rudi and generally have agreed with these changes. However, there may be some value in following Python's lead. In Python 2 they had a __cmp__ magic method and in Python 3 they removed it and added all of these: __lt__ __le__ __eq__ __ne__ __gt__ __ge__ This permits things such as NumPy to overload < to do an element-wise comparison of the members; something like this: np.array([1, 3, 5, 7]) < np.array([2, 1, 6, 6]) // evaluates to np.array([true, false, true, false) If we pursue this Pythonic route then we would also need methods for + - * / % etc. I do not want to derail the conversation too much, but it does seem opportune to discuss operator overloading more generally.