Initial data commit

Task/Matrix-transposition/JavaScript/matrix-transposition-1.js

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+function Matrix(ary) {
+    this.mtx = ary
+    this.height = ary.length;
+    this.width = ary[0].length;
+}
+
+Matrix.prototype.toString = function() {
+    var s = []
+    for (var i = 0; i < this.mtx.length; i++)
+        s.push( this.mtx[i].join(",") );
+    return s.join("\n");
+}
+
+// returns a new matrix
+Matrix.prototype.transpose = function() {
+    var transposed = [];
+    for (var i = 0; i < this.width; i++) {
+        transposed[i] = [];
+        for (var j = 0; j < this.height; j++) {
+            transposed[i][j] = this.mtx[j][i];
+        }
+    }
+    return new Matrix(transposed);
+}
+
+var m = new Matrix([[1,1,1,1],[2,4,8,16],[3,9,27,81],[4,16,64,256],[5,25,125,625]]);
+print(m);
+print();
+print(m.transpose());

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

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+(function () {
+    'use strict';
+
+    function transpose(lst) {
+        return lst[0].map(function (_, iCol) {
+            return lst.map(function (row) {
+                return row[iCol];
+            })
+        });
+    }
+
+    return transpose(
+        [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]
+    );
+
+})();

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

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+(() => {
+    "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();
+})();

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

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+[[1,4,7],[2,5,8],[3,6,9]]