Ununcurry‑this‑x is a tiny JavaScript helper that “un‑uncurries” a function—that is, it converts a function expecting an explicit `this` argument into a regular function that can be assigned to a prototype method. It lets developers easily create polyfills (e.g., `Array.prototype.includes`) by passing a stand‑alone implementation to `ununcurry` and getting a correctly bound method. The package is aimed at JavaScript library authors and anyone needing clean, reusable polyfill implementations.