How can i extract all the element from object dynamically

Question

How can I extract the specific column from an object, I have a column array and I want these fields extracted from an object which will be constructed by map loop function w

Answer 1

Just iterate over the col properties and .map to a new array. You could also consider changing the person variable name to people (or something like that), because it's a collection of persons, not a singular person, reducing the chance of confusion:

const people = [{
    firstName: "Nick",
    lastName: "Anderson",
    age: 35,
    sex: "M"
  },
  {
    firstName: "yopm",
    lastName: "Geyun",
    age: 36,
    sex: "M"
  }
]

const col = ['firstName', 'age']

console.log(
  people.map(
    person => col.map(prop => person[prop])
  )
);