Add solution to 1.7 rotateMatrix

Author: rroque98

JavaScript/chapter01/1.7 - Rotate Matrix/rroque98_sol.js

@@ -0,0 +1,29 @@
+/*Given an image represented by an N*N matrix where
+each pixel in the image is 4 bytes, write a method
+to rotate the image by 90 degrees. Can you do this
+in place?*/
+
+const rotateImage = (nestedArr) => {
+  if (nestedArr.length === 0) {
+    return [];
+  }
+  var rotatedArr = [];
+  var numOfRows = nestedArr[0].length;
+  for (let x = 0; x < numOfRows; x++) {
+    let newRow = [];
+    for (let i = nestedArr.length - 1; i >= 0; i--) {
+      newRow.push(nestedArr[i][x]);
+    }
+    rotatedArr.push(newRow);
+  }
+  return rotatedArr;
+}
+
+// TESTS:
+console.log(JSON.stringify(rotateImage([[1,2,3],[4,5,6]])) === JSON.stringify([[4,1],[5,2],[6,3]]));
+console.log(JSON.stringify(rotateImage([])) === JSON.stringify([]));
+
+// input: array of array
+// output: array of array rotated
+// constraits: Do it in place
+// edge cases: rotate clockwise? is this represented by an array of arrays of numbers?