A motoko module of a mutable queue data structure supporting both pushFront and pushBack but only popFront.
It can be conveniently used for stable variables to hold a collection of values if you don't mind O(n) lookups.
Internally it is just a linked list with both first and last pointers.
You can use this library with the vessel package manager.
Documentation is non-existent but functions should be self-explanatory given their types.
If you have installed a [nix] environment, you can run the tests like this:
nix-shell
cd test
make