How to convert json array?

Question

JavaScript

Please tell me how the array of the form

[{"id":"99","parent_id":"105},{"id":"13","parent_id":"305"}]

convert to [99, 13]

Answer 1

var a = [{"id":"99","parent_id":"105"},{"id":"13","parent_id":"305"}].map(
  function (item) {
    return +item.id;
  }
);

Answer 2

need more crutches

function getValuesByKey(array, key) {
    const res = array.map((item) => {
        return +item[key] || 0; 
    });
    return res || [];
}