day 4 done

util.ts

@@ -0,0 +1,19 @@
+import { Temporal } from "@js-temporal/polyfill";
+
+export const now = Temporal.Now;
+
+export const printTime = (duration: Temporal.Duration): string => {
+  const units = [
+    { unit: "m", value: duration.minutes },
+    { unit: "s", value: duration.seconds },
+    { unit: "ms", value: duration.milliseconds },
+    { unit: "µs", value: duration.microseconds },
+    { unit: "ns", value: duration.nanoseconds },
+  ];
+
+  const parts = units
+    .filter((u) => u.value !== 0)
+    .map((u) => `${u.value} ${u.unit}`);
+
+  return parts.join(", ");
+};