Dmitry Soshnikov (2014-10-05T06:16:04.000Z)
forbes at lindesay.co.uk (2016-02-01T12:59:54.312Z)
> ``` > ({a => 10}).mapWithKey((k, v) => ['b', 20]); // {b => 20} or {a => 20, b > => 20} ? > ``` Whoops, nevermind actually, since we don't mutate the original map (the `this`), but rather return a new one, it should always be just `{b => 20}`, and `a` key is ignored in the transformed map. Dmitry