add Util.js

1 files changed, 13 insertions, 0 deletions

diff --git a/modules/Util.js b/modules/Util.js
new file mode 100644
index 0000000..cbe466d
--- /dev/null
+++ b/modules/Util.js
@@ -0,0 +1,13 @@
+function useAverage() {
+	var avg = 0;
+	let weight = 0;
+	const append = value => {
+		avg = (weight * avg) + value;
+		weight += 1;
+		avg = avg/weight;
+	}
+
+	return [() => avg, append];
+}
+
+export { useAverage };