Codewars: Time traveller

### Link to the coursework

https://www.codewars.com/users/CodeYourFuture/authored_collections

### Why are we doing this?

Every week you need to complete at least three kata. Spend at least 20 minutes, three times a week, on your kata workout.

Choose some kata from the [Data Groups collection](https://www.codewars.com/collections/cyf-js2-slash-data-groups) but now also work through the [Array and Object Methods](https://www.codewars.com/collections/cyf-array-and-object-methods) collection. This collection specifically helps you practice working with arrays and arrays of objects. Look on the sidebar, it has a giant list of the methods that you can practice with this collection, but most important it has lots of `map` `filter` and `reduce` problems, which you will use all the time in programming.

#### Time traveller

Don't just go forwards through the collections. Loop back and review your work from last month. How have you progressed? Would you choose another solution now?

### Maximum time in hours (Tech has max 16 per week total)

1

### How to get help

- Join the #cyf-codewars Slack channel
- Read the [CYF Codewars docs](https://docs.codeyourfuture.io/leaders/running-the-course/codewars)
- Read [Codewars advice from CYFers](https://docs.codeyourfuture.io/leaders/running-the-course/codewars/codewars-advice-from-cyfers)
- Read [Codewars advice from mentors](https://docs.codeyourfuture.io/leaders/running-the-course/codewars/codewars-advice-from-mentors)

Remember, after 20 minutes, take a break.

### How to submit

Share a link in the form `https://codeyourfuture.github.io/Codewars-Progress-Checker/#YOUR_CODEWARS_USERNAME`.

You can obtain the link from the browser location bar after submitting your Codewars username on the [Codewars Progress Checker](https://codeyourfuture.github.io/Codewars-Progress-Checker/) page.

### How to review

Once you have completed your kata, look at the other solutions in the solutions view. Consider how many different approaches there are. What about different languages?