To be honest, that’s why I asked 🙂 I’m still not fully clear on what
the core objection is, even after re-scanning the discussions. And some
go far back, so I don't know if they are still a held opinion or not.
Is it that the es6_maps module's implementation can’t express certain
things (like pinning), and this makes it an incomplete solution? Or is
it simply that there is a preference around the `var:,` syntax itself?
I might be missing something, so please correct me if that’s the case.
I'd rather have a partial solution that hits 90% of the use cases, and
is pleasing to read, than something that is... something else (I can't
find a non-offensive adjective 😂), even if it does cover a few more use
cases.
But, if it does ultimately come down to your personal preference, that’s
obviously a valid prerogative you have 😂.
For what it’s worth, my own reaction is that I find the second syntax
pretty unpleasant to read. I realize that’s subjective, but the `var:,`
form consistently looks like a lexical error to me rather than an
intentional construct.
If this syntax was actually brought into core, my main concern would be
whether |es6_maps| would continue to work cleanly after such a change —
I’d strongly prefer to avoid the colon+comma form in my own codebases,
if at all possible, and after how comfortable es6_maps has become in
just a month of use, I'd hate to lose it.
-Brandon
On 2/5/26 7:59 AM, José Valim wrote:
This has been discussed multiple times, certainly in the Elixir Forum
but I believe in this mailing list too. I'd recommend reading the
previous discussions on the topic.
*
*José Valim*
https://dashbit.co/
*
On Thu, Feb 5, 2026 at 3:13 PM 'Brandon Gillespie' via
elixir-lang-core <[email protected]> wrote:
After all the conversations over the holidays around syntax sugar
with
maps, I took es6_maps out for a spin—and I have to say, I can't go
back.
Why isn't this just a core thing?
It works flawlessly. Is so much simpler, and code is much more
readable too.
Compare/Contrast a very basic example. Before:
```
...
|> Map.reduce(%{list: [], total: 0}, fn %{house: house, count:
count}, %{list: list, total: total} ->
%{list: [%{house: house, count: count} | list], total: total
+ count}
end)
```
After:
```
...
|> Map.reduce(%{list: [], total: 0}, fn %{house, count}, %{list,
total} ->
%{list: [%{house, count} | list], total: total + count}
end)
```
I'm just curious what the opposition is, to having es6_maps just be
merged into the mainline elixir things?
-Brandon Gillespie
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