Actually, what would be really cool is a Kernel macro similar to put_in
that would handle various forms of this, let's say it was called
"flow_into". That would allow all of the mechanics of put_in() to work in
a pipe.
def nice_example(map) do
map
|> get_in([:post, :comments, Access.all(), :likes])
|> Enum.sum()
|> flow_into(map[:sum_of_comment_likes])
end
I really found the mechanics of updating complex structures to be
intimidating when I first started using Elixir. put_in was a great
discovery for me that allowed me to make progress without worrying about
the more mundane mechanics of sticking a result in an array that was in a
map.
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