David Freitag

[freitagdavid]

No description provided.

[johnoro]

Great work!

[johnoro]

You could forego the wrapping function and just use console.log as your callback here:

getLength(items, console.log);

then, because of return cb(arr.length) will pretty much equate to console.log(items.length)

[johnoro]

Here is an example of another approach to this problem:

const donationsByCompany = runners
  .reduce((acc, { company_name, donation }) => {
    if (acc.hasOwnProperty(company_name)) {
      acc[company_name] += donation;
      return acc;
    } else {
      return { ...acc, [company_name]: donation };
    }
  }, {});

using object destructuring and spread syntax.