Proxy example

Author: tshemsedinov

JavaScript/2-proxy.js

@@ -0,0 +1,19 @@
+'use strict';
+
+const ops = {
+  max: Math.max,
+  sum: (...nums) => nums.reduce((a, b) => a + b),
+  avg: (...nums) => ops.sum(...nums) / nums.length,
+};
+
+const lazy = (data) => new Proxy(data, {
+  get: (data, key) => (ops[key] ? ops[key](...data) : data[key])
+});
+
+const data = lazy([10, -17, 0, 2, 9, -4, -1, 32, 14]);
+
+console.dir({
+  max: data.max,
+  sum: data.sum,
+  avg: data.avg,
+});