2016 Update

Task/Matrix-transposition/JavaScript/matrix-transposition-2.js

@@ -1,12 +1,16 @@
-transpose = function(a) {
-	return a[0].map(function(x,i) {
-		return a.map(function(y,k) {
-			return y[i];
-		});
-	});
-}
+(function () {
+    'use strict';
 
-A = [[1,2,3],[4,5,6],[7,8,9],[10,11,12]];
+    function transpose(lst) {
+        return lst[0].map(function (_, iCol) {
+            return lst.map(function (row) {
+                return row[iCol];
+            })
+        });
+    }
 
-JSON.stringify(transpose(A));
-"[[1,4,7,10],[2,5,8,11],[3,6,9,12]]"
+    return transpose(
+        [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]
+    );
+
+})();

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

@@ -0,0 +1,16 @@
+(() => {
+    'use strict';
+
+    // transpose :: [[a]] -> [[a]]
+    let transpose = xs =>
+        xs[0].map((_, iCol) => xs.map((row) => row[iCol]));
+
+
+
+    // TEST
+    return transpose([
+        [1, 2],
+        [3, 4],
+        [5, 6]
+    ]);
+})();

Task/Matrix-transposition/JavaScript/matrix-transposition-4.js

@@ -0,0 +1 @@
+[[1, 3, 5], [2, 4, 6]]