I read Ephemerons explained today after finding it on Hacker News, and it was good but lengthy. It was also described in terms of the Squeak language and included post-mortem finalization, which is ...

This is a fast, lightweight (~1.94kb ungzipped, and only 703 bytes gziped) JavaScript Map and Weakmap polyfill. If you don't want to download the script, then you can ...

TIP: WeakMaps exhibit the same behavior as a WeakSets, except WeakMaps work with key-values pairs instead of individual items. This is expected behavior because WeakMap can only contain objects as ...