javascript 返回数组中的最大数字

Posted 2021-05-03

function largestOfFour(arr) {
  let arrOfLargestNums = [];

  for (let i = 0; i < arr.length; i++) {
    let largestNumInSub = -10000000;
    for (let j = 0; j < arr[i].length; j++) {
      if (arr[i][j] > largestNumInSub) {
        largestNumInSub = arr[i][j];
      }
    }
    arrOfLargestNums.push(largestNumInSub);
  }

  return arrOfLargestNums;
}

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