A notice of obsolescence

That sounds bad but I promise it’s not.

Starting in GameMaker 2024.14/2025 LTS, this is how array appendage is handled by the runtime, meaning that there’s pretty much no need for this data structure going forward. I’ll be leaving it up for posterity but going forward I don’t think it’ll ever be needed again.

This is also how arrays work in GMRT, as GMRT is a complete rewrite of the runtime.

For more information see this video.