largest_of_4_arrays.js

function largestOfFour(arr) {
   var array_of_large_num_in_each_subarray = [];
   arr.forEach(function(subarray,index){
    console.log("subarray " +subarray);
      var temp = 0;
    subarray.forEach(function(item,index){
       console.log("ITEM--->" + item);
     if(item > temp){
       temp = item;
     }
     });
       array_of_large_num_in_each_subarray.push(temp);
   });
   return array_of_large_num_in_each_subarray;
}

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

/*
Return an array consisting of the largest number from each provided sub-array. For simplicity, the provided array will contain exactly 4 sub-arrays.

Remember, you can iterate through an array with a simple for loop, and access each member with array syntax arr[i].

largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]) should return an array.
largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]]) should return [27,5,39,1001].
largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]]) should return [9, 35, 97, 1000000].

*/