Clojurians Log v2
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clojure-uk
A place for people in the UK, near the UK, visiting the UK, planning to visit the UK or just vaguely interested to randomly chat about things (often vi and emacs, occasionally clojure). More general the #ldnclj
dharrigan 2020-09-07T06:12:00.183300Z
Good Morning!
seancorfield 2020-09-07T06:44:08.183500Z
Happy Monday! 🙂
alexlynham 2020-09-07T07:07:18.183600Z
morning
djm 2020-09-07T07:08:12.183800Z
👋
thomas 2020-09-07T08:32:13.184Z
morning
mccraigmccraig 2020-09-07T08:38:09.184200Z
¡måning!
dharrigan 2020-09-07T09:25:52.185600Z
Well today I learnt something new. You can redefine a defmethod. I always thought you couldn't as I understood multimethods were cached and un-redefinable.
dharrigan 2020-09-07T09:27:00.186800Z
But, if I understand now, it's the dispatch function that cannot be changed. However, I see there is a little trick to use a reference to a function which does the dispatching, wihthin the defmulti
2020-09-07T10:16:11.187200Z
You can redefine them if you use clojure.tools.namespace’s refresh / clear etc.
Also you can also do so manually by just (def mymulti nil) then re-eval the defmulti and defmethods you want.
Also remove-method and remove-all-methods
Jakob Durstberger 2020-09-07T14:14:58.187500Z
Morning 👋
2020-09-07T14:39:38.187700Z
you can blat the defmulti and redeclare it
2020-09-07T14:40:20.187900Z
but you cannot just redeclare overwrite it because there is a defonce squirreled away inside, and it will just ignore you
dharrigan 2020-09-07T16:51:40.188300Z
thank you 🙂
dharrigan 2020-09-07T16:51:45.188500Z
thank you 🙂