Initial data commit

Task/Matrix-transposition/JavaScript/matrix-transposition-3.js

@@ -0,0 +1,28 @@
+(() => {
+    "use strict";
+
+    // transpose :: [[a]] -> [[a]]
+    const transpose = xs =>
+        0 < xs.length ? (
+            xs[0].map(
+                (_, iCol) => xs.map(
+                    row => row[iCol]
+                )
+            )
+        ) : [];
+
+
+    // ---------------------- TEST -----------------------
+    const main = () =>
+        JSON.stringify(
+            transpose([
+                [1, 2, 3],
+                [4, 5, 6],
+                [7, 8, 9]
+            ])
+        );
+
+
+    // MAIN ---
+    return main();
+})();