Sometimes, you want to store items efficiently in a dictionary, but you don't know (or don't care) about what key to use, but you do want to store the values more efficiently than in a list.
The Iddict module in Elm lets you store values in a dictionary without including a key. Then, you can refer to the item using its integer key. The Iddict uses a counter, so keys will never collide - even after removing items.
In your terminal, type
elm install noordstar/elm-iddict
And the library will be installed shortly!