gistfile1.txt

function largestOfFour(arr) {
  // You can do this!
  var max=0,i=0,j=0;
  var newArray=[];
  for (i=0;i<arr.length;i++){
   for(j=0;j<=arr.length;j++)
	   if(arr[i][j]>max){
		   max=arr[i][j];
		   
	   }
	   newArray.push(max);
  
  }
  console.log(newArray);
  return newArray;
}

largestOfFour([[13, 27, 18, 26],[13, 27, 18, 26],[4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]]);