Create nested object and log it

JavaScript

let rootObj = {};
let nestedObj = {};
let data = [{ eins: 1 }, { zwei: 2 }, { drei: 3 }];
for (let key in data) {
  let value = data[key];
  switch (key) {
    case 'eins':
    case 'drei':
      nestedObj[key] = value;
      break;
    default:
      break;
  }
}
rootObj['child1'] = nestedObj;
console.log(JSON.stringify(rootObj));
console.log(rootObj);