Create 2623-memoize.js

Author: dmgodoy

javascript/2623-memoize.js

@@ -0,0 +1,24 @@
+/**
+ * @param {Function} fn
+ * @return {Function}
+ */
+function memoize(fn) {
+    let memo = {};
+    return function (...args) {
+        let argsjson = JSON.stringify(args);
+        if (memo.hasOwnProperty(argsjson))
+            return memo[argsjson];
+        return memo[argsjson] = fn(...args);
+    }
+}
+
+/** 
+ * let callCount = 0;
+ * const memoizedFn = memoize(function (a, b) {
+ *	 callCount += 1;
+ *   return a + b;
+ * })
+ * memoizedFn(2, 3) // 5
+ * memoizedFn(2, 3) // 5
+ * console.log(callCount) // 1 
+ */