问对于在所有迭代中最终为true的每个条件，将计数器值推入一个新数组中。

EN

let array1 = [5, 6, 44, 2, 6];
let array2 = ['', '', '', 5 , 7];

const result = array1.map((item1, i) => {
  const item2 = array2[i];
  return Boolean(item1) + Boolean(item2); // gets converted to number
});
console.log(result);

const arrs = [
  [5, 6, 44, 2, 6],
  ['', '', '', 5 , 7],
];
const { length } = arrs[0];
const result = Array.from(
  { length },
  (_, i) => arrs.reduce((a, arr) => a + Boolean(arr[i]), 0)
);
console.log(result);

const arrs = [
  [5, 6, 44, 2, 6],
  ['', '', '', 5 , 7],
];
const { length } = arrs[0];
const result = [];
arrs.forEach(arr =>
  arr.forEach((item, i) => result[i] = (result[i] || 0) + Boolean(item))
);
console.log(result);

const array1 = [5, 6, 44, 2, 6];
const array2 = ['', '', '', 5 , 7];
const array3 = [1, '', 0, 1, false]

const zipped = _.zip(array1, array2, array3);

// `zipped` should now look like this, where each element
// is an array that represents all of the elements a given
// position from all of the original arrays.
// [
//     [5, "", 1],
//     [6, "", ""],
//     [44, "", 0],
//     [2, 5, 1],
//     [6, 7, false],
// ]

const results = _.map(zipped, (array) => {
    // lodash doesn't seem to have a `count`, but it does have `countBy`
    const counts = _.countBy(array, (element) => new Boolean(element));

    // Here `counts` will be an object showing how many items in the array were `true` and how many were `false`.
    // For example, in the first iteration, it will look like `{ "false": 1, "true": 2 }`

    // So, only return the count that is `true`.
    return counts['true'];    
});

// Here, the results is:
// [2, 1, 1, 3, 2]

// empNum() is a function which takes 2 arrays of same length as parameters
var empNum = (data1, data2) => {
    var activeArr = [];

    for (var i=0; i<data1.length; i++) {
        activeArr.push(data1[i] && data2[i] ? 2 : 1); // Using ternary operator ?:
    }
    return activeArr; 
}

// Test 1
var array1= [5, 6, 44, 2, 6];
var array2 = ['', '', '', 5, 7];
console.log(empNum(array1, array2)); //[ 1, 1, 1, 2, 2 ]

// Test 2
console.log(empNum([5, 0, 44, 2, 6], [8, 7, undefined, 5, 7,] )); // [ 2, 1, 1, 2, 2 ]

// Test 3
console.log(empNum(["JavaScript", 0, undefined, null, 6], [8, 7, undefined, 5, 7,] )); // [ 2, 1, 1, 1, 2 ]


// Test 4
console.log(empNum([0, 0, 44, 2, "Python"], [8, 7, undefined, 5, 7,] )); // [ 1, 1, 1, 2, 2 ]

[ 1, 1, 1, 2, 2 ]
[ 2, 1, 1, 2, 2 ]
[ 2, 1, 1, 1, 2 ]
[ 1, 1, 1, 2, 2 ]