From 9970036d203ba2d0a46b35ba6fad21d49441cdd4 Mon Sep 17 00:00:00 2001
From: Elizabeth Hunt <me@liz.coffee>
Date: Sun, 27 Jul 2025 17:03:10 -0700
Subject: hai

---
 lib/leftpadesque/memoize.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 lib/leftpadesque/memoize.ts

(limited to 'lib/leftpadesque/memoize.ts')

diff --git a/lib/leftpadesque/memoize.ts b/lib/leftpadesque/memoize.ts
new file mode 100644
index 0000000..2f0e87a
--- /dev/null
+++ b/lib/leftpadesque/memoize.ts
@@ -0,0 +1,14 @@
+import type { Callable } from '@emprespresso/pengueno';
+
+export const memoize = <R, F extends Callable<R>>(fn: F): F => {
+    const cache = new Map<string, R>();
+    return ((...args: unknown[]): R => {
+        const key = JSON.stringify(args);
+        if (cache.has(key)) {
+            return cache.get(key)!;
+        }
+        const res = fn(...args);
+        cache.set(key, res);
+        return res;
+    }) as F;
+};
-- 
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