This question is mostly for @bmeck, but I have a problem that the compositeKey proposal sounds like it might solve, and I wanted to explore it as a solution.
I represent a pixel as an object with the properties
y are the coordinates. I’d like to be able to use a Set with these objects such that an object with the same
y values is treated as the same object. That is, the function that the Set uses for whether the objects are equal isn’t object identity but is instead based on the values.
Is this a good use case for compositeKey? If so, is it far enough along that I could use a version of it in a Node.js environment?