Initial data commit

Task/Sierpinski-triangle/JavaScript/sierpinski-triangle-3.js

@@ -0,0 +1,26 @@
+(() => {
+    "use strict";
+
+    // --------------- SIERPINSKI TRIANGLE ---------------
+
+    // sierpinski :: Int -> String
+    const sierpinski = n =>
+        Array.from({
+            length: n
+        })
+        .reduce(
+            (xs, _, i) => {
+                const s = " ".repeat(2 ** i);
+
+                return [
+                    ...xs.map(x => s + x + s),
+                    ...xs.map(x => `${x} ${x}`)
+                ];
+            },
+            ["*"]
+        )
+        .join("\n");
+
+    // ---------------------- TEST -----------------------
+    return sierpinski(4);
+})();