`array-keyed-map` is a lightweight JavaScript library that implements a Map‑like associative container whose keys are **arrays of arbitrary values**, preserving element identity (including objects, functions, RegExps, etc.) without stringifying them. It stores these “paths” efficiently as a shared‑prefix tree and offers the same API as the native `Map` (except iteration order), making it useful for developers who need fast, memory‑efficient look‑ups on composite keys such as hierarchical paths or multi‑field identifiers.