<pre class="shiki github-dark shaku"><code>/** * @param {Function} func * @param {(args:[]) =&gt; string } [resolver] - cache key generator */function memo(func, resolver) { const store = {}; return function memoized(...args) { const key = resolver ? resolver(...args) : Array.from(args).join('_'); const cachedValue = store[key] if (cachedValue) { return cachedValue; } const result = func.apply(this, args); store[key] = result; return result; }}</code></pre>