Extracting a common Object from two Javascript objects with same keys

Question

I have two Javascript objects with the same keys but the keys with some value in obj1 are empty in obj2 and vice versa. There can also be keys that are empty in both objects.

obj1 = {
 a: 1,
 b: 2,
 c: ' ',
 d: ' ',
 e: ' '
}

obj2 = {
 a: ' ',
 b: ' ',
 c: 3,
 d: 5,
 e: ' '
}

I want a combined object which contains the keys with values from both objects, and in case both the keys are empty it simply places it as empty

Expected result:

result = {
 a: 1,
 b: 2,
 c: 3,
 d: 5,
 e: ' '
}

I have tried using the spread operator but the second object always takes precedence over the first :> {...obj1, ...obj2}

Answer 1

You could take advantage of the Object.keys method and the reduce one to create the result object

let obj1 = {
  a: 1,
  b: 2,
  c: ' ',
  d: ' ',
  e: ' '
}

let obj2 = {
  a: ' ',
  b: ' ',
  c: 3,
  d: 5,
  e: ' '
}
let result = Object.keys(obj1).reduce((acc, curr) => {
  val = obj1[curr] != " " ? obj1[curr] : obj2[curr];
  return { ...acc,
    ...{
      [curr]: val
    }
  }
}, {})

console.log(result)