F(cafe)Expression problem:how to write easy-extensible software?

Next meet up F(cafe): Expression problem:how to write easy-extensible software? Expression problem is about independent adding of the new objects and\or the new operations done on them. It is often used to describe the difference between the OOP and FP approach to writing software. But is it really paradigm-dependent? Can your language solve it? And what are the common approaches to solve it? Speaker: Iaroslav Karkunov, Senior Software Engineer at Intetics Inc. Iaroslav Karkunov is a software developer from Kyiv, Ukraine. He has great expertise in mathematics and programming. Iaroslav became interested in the functional programming since he started working with FP-languages 4 years ago. Currently, he is a team-lead in one of the most prominent e-learning companies in Europe. Iaroslav is focused on the following stack of technologies – Haskell, Erlang, Elixir and doing research about functional programming and its connections with mathematics. Registration form: https://goo.gl/forms/HMPP3UfZcVcvm0Lx2 When: 26 December, 19:00 Where: Kyiv, 21, Kostiantynivska str. Freud House Price: 49 uah for 1st hour, 39uah - all next hours.