Merge remote-tracking branch 'upstream/master'

1 files changed, 17 insertions, 0 deletions

diff --git a/challenge-109/dave-jacoby/node/ch-1.js b/challenge-109/dave-jacoby/node/ch-1.js
new file mode 100644
index 0000000000..72452fdcb5
--- /dev/null
+++ b/challenge-109/dave-jacoby/node/ch-1.js
@@ -0,0 +1,17 @@
+"use strict";
+
+let list = Array(20)
+  .fill()
+  .map((x, i) => i + 1)
+  .map((x) => chowla(x));
+console.log(list.join(", "));
+
+function chowla(n) {
+  return Array(n)
+    .fill()
+    .map((x, i) => i + 1)
+    .filter((x) => x != 1)
+    .filter((x) => x != n)
+    .filter((x) => n % x == 0)
+    .reduce((a, v) => a + v, 0);
+}