a minimal JS javelin, https://gist.github.com/alandipert/b433959f6e0ddf9487c9bdbe73789a75

i think it's glitch-free, because Set maintains insertion order

this is part of an ongoing effort to fuse the concept of a cell with a mutalble relation/table datatype, in order to do reactive relational operations... in order to deal with collections without immutable collection values 😅