Another update from ingydotnet^djgoku

Task/Spiral-matrix/JavaScript/spiral-matrix-2.js

@@ -0,0 +1,67 @@
+(function (n) {
+
+  // Spiral: the first row plus a smaller spiral rotated 90 degrees clockwise
+  function spiral(lngRows, lngCols, nStart) {
+    return lngRows ? [range(nStart, (nStart + lngCols) - 1)].concat(
+      transpose(
+        spiral(lngCols, lngRows - 1, nStart + lngCols)
+      ).map(reverse)
+    ) : [
+      []
+    ];
+  }
+
+  // rows and columns transposed (for 90 degree rotation)
+  function transpose(lst) {
+    return lst.length > 1 ? lst[0].map(function (_, col) {
+      return lst.map(function (row) {
+        return row[col];
+      });
+    }) : lst;
+  }
+
+  // elements in reverse order (for 90 degree rotation)
+  function reverse(lst) {
+    return lst.length > 1 ? lst.reduceRight(function (acc, x) {
+      return acc.concat(x);
+    }, []) : lst;
+  }
+
+  // [m..n]
+  function range(m, n) {
+    return Array.apply(null, Array(n - m + 1)).map(function (x, i) {
+      return m + i;
+    });
+  }
+
+  // TESTING
+
+  var lstSpiral = spiral(n, n, 0);
+
+
+  // OUTPUT FORMATTING - JSON and wikiTable
+  function wikiTable(lstRows, blnHeaderRow, strStyle) {
+    return '{| class="wikitable" ' + (
+      strStyle ? 'style="' + strStyle + '"' : ''
+    ) + lstRows.map(function (lstRow, iRow) {
+      var strDelim = ((blnHeaderRow && !iRow) ? '!' : '|');
+
+      return '\n|-\n' + strDelim + ' ' + lstRow.map(function (v) {
+        return typeof v === 'undefined' ? ' ' : v;
+      }).join(' ' + strDelim + strDelim + ' ');
+    }).join('') + '\n|}';
+  }
+
+  return [
+    wikiTable(
+
+      lstSpiral,
+
+      false,
+      'text-align:center;width:12em;height:12em;table-layout:fixed;'
+    ),
+
+    JSON.stringify(lstSpiral)
+  ].join('\n\n');
+
+})(5);

Task/Spiral-matrix/JavaScript/spiral-matrix-3.js

@@ -0,0 +1 @@
+[[0,1,2,3,4],[15,16,17,18,5],[14,23,24,19,6],[13,22,21,20,7],[12,11,10,9,8]]