Memoization interview questions

Implement a function that wraps a callback so it runs at most one time and reuses that result thereafter.

Rewrite useCounter so the returned helpers keep stable identities across renders.

Implement a function that counts the number of unique paths a robot can take from the top-left to bottom-right of an m by n grid.

Implement a function that caches results of a single-argument function so repeat calls return instantly.

Implement a memoize helper that caches results for functions called with any number and type of arguments.

Extend memoize with a custom key resolver and cache controls (.clear() and .delete(key)).

Build memoized selectors that recompute only when their input selections change by reference.

Implement a function that decides whether a string can be broken into a sequence of words from a given dictionary.