JavaScript via Node.js

1 files changed, 19 insertions, 0 deletions

diff --git a/gcd.js b/gcd.js
new file mode 100755
index 0000000..8c3cd76
--- /dev/null
+++ b/gcd.js
@@ -0,0 +1,19 @@
+#!/usr/bin/node
+
+
+function gcd2(a, b) {
+    return b == 0 ? a : gcd2(b, a % b);
+}
+
+// Don't use parseInt() itself in map() - it used to have 2 arguments
+var nums = process.argv.map(
+        function(s) {return parseInt(s)}
+    ).filter( // It will not work if this script or node itself is named as number ;-)
+        function(t) {return !isNaN(t)}
+    );
+
+if (nums.length > 0) {
+    var GCD = nums.reduce(gcd2); // Yeah, we could use lambda here
+    console.log(GCD);
+}
+