根据已过滤键创建新对象

Question

Suppose I have an array of strings that represent keys such as ['a', 'b', 'd'] , and an existing object such as...

const obj = {
    a: 1,
    b: 2,
    c: 3,
    d: 4,
    e: 5
}

Is there a method of creating a new object that is a filtered version of obj based on the keys in the array such that...

const updated = {
    a: 1,
    b: 2,
    d: 4
}

using the Object.assign() function?

I know it works with a function such as...

function createNew(o, keys) {
    const updated = {}

    Object.keys(o).forEach(k => {
      if (keys.includes(k)) updated[k] = o[k]
    })

    return updated
}

but I'm looking for a solution with Object.assign()

Answer 1

 const obj = { a: 1, b: 2, c: 3, d: 4, e: 5 }; const desiredKeys = ['a', 'c', 'd']; const result = desiredKeys.reduce((acc, key) => { acc[key] = obj[key]; return acc; }, {}); console.log(result);