How to group by two array by index in javascript with es6 or lodash?

Question

We have same two arrays to groupby theme by index. Two arrays with same length and different value like blow. How to groupby two array with their index by ES6 reduce or lodash?

array1 = [1,2,3,4] OR [{a:1},{b:2},{c:3},{d:4}]
array2 = [5,6,7,8] OR [{e:5},{f:6},{g:7},{h:8}]

finalArray = [[1,5],[2,6],[3,7],[4,8]]

I'm trying with different ways like group by with reduce in es6 or lodash concat but i can't find best solution for my problems.

Answer 1

Try this:

let array1 = [1, 2, 3, 4];
let array2 = [5, 6, 7, 8];
let res = array1.map((value, index) => {
  return [value, array2[index]]
})
console.log(res);

If it is array of objects

let array1 = [{a:1},{b:2},{c:3},{d:4}];
let array2 = [{e:5},{f:6},{g:7},{h:8}];

let res = array1.map((value, index) => {
  return [Object.values(value)[0],Object.values(array2[index])[0]]
})
console.log(res)