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?

Commencez par les collections Codewars liées Data Groups et Array and Object Methods, puis examinez les kata précédemment terminés comme indiqué dans l’issue. La tâche est considérée comme terminée lorsque vous avez terminé au moins trois kata, réfléchi aux solutions précédentes et envoyé le lien Codewars Progress Checker.

Rédigé par le modèle d'indexation à partir du texte de l'issue.