如何将两个数组减少为出现在同一索引中的单个值？

function reduceArrays(arr1, arr2) {
  var result = [];
  var length = Math.min(arr1.length, arr2.length);
  
  for (var i = 0; i < length; i++) {
    if (arr1[i] === arr2[i]) {
      result.push(arr1[i]);
    }
  }
  
  return result;
}

// 示例用法
var array1 = [1, 2, 3, 4, 5];
var array2 = [1, 3, 5, 7, 9];
var reducedArray = reduceArrays(array1, array2);
console.log(reducedArray);  // 输出 [1, 5]