/internal_coding_challenge_01

Primary LanguageJavaScript

PALO IT internal coding challenge edition 01

For fun and education

Table of contents

  1. Table of contents
  2. Overview
  3. Requirements
  4. How to use
  5. How to participate
  6. Function description
  7. Scoring
  8. Additional info

Overview

The first edition of Palo IT internal coding challenge. The task is to write a small piece of code. Your solution has to be readable, preferment and pass provided tests.

Requirements

You need to have Node.js in reasonable version installed. (8<)

Use

npm install

to install all the dependencies.

How to use

Implement functionUnderTest in src/functionUnderTest/index.js file according to specs and tests.

Use

npm start

to check your solution against tests. You can also run tests in watch mode with

npm i -g jest
jest --watch

or use VSC plugin.

How to participate

  1. Create a branch with your name eg feature/your_name_here.
  2. Implement and commit your solution there. It should take you no more than 2h. Feel free to experiment with different solutions.
  3. When your solution is ready create a pull request to the master branch.
  4. Once all participants will finish everyone will take part in scoring.

##Function description

The function will take the collection name (tableName) campaign object campaign and should return upsertCampaign() result.

The campaign object model description:

/**
 * A Slot
 * @typedef {Object} Slot
 * @property {string=} id - The identifier
 * @property {boolean=} error determines there is an error in the slot
 *
 * @example { id: '22', error: false }
 */

/**
 * A campaign
 * @typedef {Object} Campaign
 * @property {string=} id - The identifier
 * @property {Date=} createdAt - The date
 * @property {Slot[]} bookingSlots - The list of booking slot objects
 *
 * @example {id: 'qwe', createdAt: new Date(), bookingSlots: [ ... ] }
 */
  • When campaign is new (ie. does not have an id) function needs to create it using generateId(), and add the createdAt with current date.
  • when a slot is in error state the function needs to update it using upsertBooking(slot, true)
  • when a slot needs to be removed (the id changed to '0') the function needs to update it using upsertBooking(slot, false) then it has to be removed from the campaign and updated campaign has to be saved using upsertCampaign(tableName, campaign)
  • it there was an error performing upsert function has to return error object
{
  success: false,
  statusCode: 400
}

Scoring

There will be two benchmarks determining the quality of your solution:

  1. Performance There are test that measure execution time of you method on big data sets. Lowest sum of the execution times wins. Winner gets 1 point, second place gets 2 points etc.
  2. Code readability Every participant will judge others' code readability. After the implementation all will go through all the branches and order them from most to least readable (NO VOTING IN YOUR OWN CODE). Again winner gets 1 point, second place gets 2 points etc.

Finally Performance and Code readability scores will be added and the lowest score wins!!

Example

3 participants  A, B, C

participant A's solution turned out to be the quickest one, but hes colleges both said his solution was least readable.
Performance: 1pt
Readability: 2pt + 2pt
Score: 5pt

Additional info

If you have any questions, please contact me (Jan) or Alex