Latana Chart Challenge

Overview

At Latana, we look beyond CVs and try to understand early in the process how you might approach problem solving. For this, we have prepared a short technical exercise which provides an example of the type of issue we often face. For you, the challenge is an opportunity to demonstrate your capabilities while at the same time getting a first glimpse of what your day-to-day work could look like at Latana.

Please attempt to complete the challenge to the best of your ability and keep in mind that there are no perfect submissions. We also understand that time is precious so please also limit the amount of time you spend on this challenge (we would expect this to be about 2 hours).

If you have any questions or have any issues, please let us know.

Thank you for taking the time to complete this challenge and good luck!

The Challenge

At Latana we conduct surveys all over the world. In order to help our clients make sense of the data from these surveys, we are building tools to allow them to both visualise and analyse data.

We would like you to build an interactive chart for visualising some survey results. We would like to have the ability to apply filters to the chart (e.g. only displaying results according to the answer demographics).

We suggest using an existing chart library (e.g. chart.js) however this decision is left to you. You can also use any libraries or frameworks which you feel may assist you in completing the task. Remember to include any dependencies in the package.json

Please see below for further detailed instructions to guide your submission.

Instructions

1. Create a new private repository called chart-challenge

2. Duplicate the source repository

   • Please do not fork this repo because you cannot restrict access to a forked public repository.
   • Remember to replace your {exampleuser} in the command below

   $ git clone --bare git@github.com:DaliaResearch/chart-challenge.git
   $ cd chart-challenge.git
   $ git push --mirror git@github.com:{exampleuser}/chart-challenge.git
   $ cd .. 
   $ rm -rf chart-challenge.git
   $ git clone git@github.com:{exampleuser}/chart-challenge.git
   

3. Implement your interactive charting functionality.

4. Include any instructions (or other useful comments) in the comments.txt file.

5. Commit your changes to your local branch then push to the remote repository.

6. Add the users pc256 as collaborator to the repository

7. Drop us an email letting us know you've finished.

Other Useful Information

To assist you we have provided an endpoint which you can call to return some raw data. This can be run in the terminal as follows ...

$ node src/server/app.js

You can then submit a request to the end-point and receive some survey data back ...

$ curl -I -X GET localhost:3456/data
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: application/json; charset=utf-8
Content-Length: 1100287
ETag: W/"10c9ff-bjEo04BeecoM4mCncJQgwZ+vlOo"
Date: Mon, 08 Jul 2019 10:12:58 GMT
Connection: keep-alive

The submission should be:

• Written in modern Javascript or Typescript.
• Structured in a clear manner.
• Should render sensibly on a mobile device.
• Be visually appealing.

Happy Coding!