function hasPath(obj, path) {
  let copyObj = obj;
  return path.split('.').every(key => {
    if (
      copyObj &&
      typeof copyObj === 'object' &&
      Object.prototype.hasOwnProperty.call(copyObj, key)
      && copyObj[key]
    ) {
      copyObj = copyObj[key]; // go deeper, even if null/undefined
      return true;
    }
    return false;
  });
}

// Example
const testObj = {
  name: { first: 'testing' },
  age: 30,
  phone: null
};

const array = ['name.first', 'name.last', 'age', 'phone', 'address.street'];

array.forEach(keyPath => {
  console.log(keyPath, hasPath(testObj, keyPath));
});