Wrapping the example matrix with outer array

Without the outer array , given arrays are passed as 4 arguments to the `island` function

Author: tmkasun

Graphs/NumberOfIslands.js

@@ -81,8 +81,10 @@ const islands = (matrixGrid) => {
 export { islands }
 
 // islands(
-//   ['1', '1', '0', '0', '0'],
-//   ['1', '1', '0', '0', '0'],
-//   ['0', '0', '1', '0', '0'],
-//   ['0', '0', '0', '1', '1']
+//  [
+//    ['1', '1', '0', '0', '0'],
+//    ['1', '1', '0', '0', '0'],
+//    ['0', '0', '1', '0', '0'],
+//    ['0', '0', '0', '1', '1']
+//  ]
 // )