Code style fixes for matrix rotation algorithm.

Author: trekhleb

src/algorithms/uncategorized/square-matrix-rotation/README.md

@@ -92,13 +92,13 @@ A B C
 / / •
 / • • 
 
-And not let's do horizontal reflection:
+And now let's do horizontal reflection:
 
 A → →
 B → →
 C → →
 
-The string has been rotated to 90 degree.
+The string has been rotated to 90 degree:
 
 • • A
 • • B

src/algorithms/uncategorized/square-matrix-rotation/squareMatrixRotation.js

@@ -8,19 +8,28 @@ export default function squareMatrixRotation(originalMatrix){
 // Do top-right/bottom-left diagonal reflection of the matrix.
 for(letrowIndex=0;rowIndex<matrix.length;rowIndex+=1){
 for(letcolumnIndex=rowIndex+1;columnIndex<matrix.length;columnIndex+=1){
-consttmp=matrix[columnIndex][rowIndex];
-matrix[columnIndex][rowIndex]=matrix[rowIndex][columnIndex];
-matrix[rowIndex][columnIndex]=tmp;
+// Swap elements.
+[
+matrix[columnIndex][rowIndex],
+matrix[rowIndex][columnIndex],
+]=[
+matrix[rowIndex][columnIndex],
+matrix[columnIndex][rowIndex],
+];
 }
 }
 
 // Do horizontal reflection of the matrix.
 for(letrowIndex=0;rowIndex<matrix.length;rowIndex+=1){
 for(letcolumnIndex=0;columnIndex<matrix.length/2;columnIndex+=1){
-constmirrorColumnIndex=matrix.length-columnIndex-1;
-consttmp=matrix[rowIndex][mirrorColumnIndex];
-matrix[rowIndex][mirrorColumnIndex]=matrix[rowIndex][columnIndex];
-matrix[rowIndex][columnIndex]=tmp;
+// Swap elements.
+[
+matrix[rowIndex][matrix.length-columnIndex-1],
+matrix[rowIndex][columnIndex],
+]=[
+matrix[rowIndex][columnIndex],
+matrix[rowIndex][matrix.length-columnIndex-1],
+];
 }
 }