Yesterday I wrote code like the following:
[x: 1, y: 2 | [z: 3]]
I was really surprised when it didn't compile:
** (CompileError) iex:1: undefined function |/2
(stdlib) lists.erl:1354: :lists.mapfoldl/3
(stdlib) lists.erl:1355: :lists.mapfoldl/3
The non-shorthand version works fine.
[{:x, 1}, {:y, 2} | [z: 3]]
#=> [x: 1, y: 2, z: 3]
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