This isn’t something I’ve needed often, but every time I have needed
it, I have to look up the docs of merge/3. Basically, I want to merge
two keyword lists or maps but only add new values (do not replace old
values). I know that this is just:

```elixir
Keyword.merge(left, right, fn _k, lv, _rv -> lv end)
```

But I have to look it up in the docs every time; I think that adding
the new name here would be good UX. Alternatively, the accepted values
for `merge/3` could be changed to accept a conflict function or an
atom indicating the merge strategy. This is, IMO, worse UX because it
would also be incompatible with older versions (delaying its adoption
by libraries).

-a
-- 
Austin Ziegler • [email protected][email protected]
http://www.halostatue.ca/http://twitter.com/halostatue

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