https://github.com/abhi18av/innovation-competition

Submission for a programming challenge
https://github.com/abhi18av/innovation-competition

clojure clojurescript data-analysis

Last synced: 4 days ago
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Submission for a programming challenge

• Host: GitHub
• URL: https://github.com/abhi18av/innovation-competition
• Owner: abhi18av
• License: epl-2.0
• Created: 2019-08-20T10:09:44.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-09-02T10:58:50.000Z (over 5 years ago)
• Last Synced: 2024-11-09T19:29:12.224Z (2 months ago)
• Topics: clojure, clojurescript, data-analysis
• Language: HTML
• Homepage:
• Size: 2.32 MB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.html
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        


README.md

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Problem Statement: Nosco Hiring Challenge

There is an innovation competition across the land, and the various

houses compete. All the ideas have been collected and scored, and now is the time

to calculate the results to find out the most innovative houses.





The innovation score of a house is simply the average scores of all the ideas

submitted by people affiliated with this house.





Higher is better.





Ideas with no scores are excluded from consideration.





Some people are affiliated with no house, in which case they should be counted as if in the house 'Free folk'.





Some people are affiliated with more than one house, in which case the idea is credited to each and every one of the affiliated houses. For example, if user A is affiliated with houses X and Y, and they have submitted an idea that has a score of 5.7, both house X and Y will add a score of 5.7 in their tally.





Input Data

The input data is two JSON files, and their EDN counterparts (containing the same data).





users.json contains various users, each having an id first name, last name, email, and potentially a list of their house affiliation(s).





ideas.json contains various ideas, each one having an id, a title, a body, an author-id (pointing to one entry in the users.json file) and an array of numeric scores. Unfortunately some scores were lost and were replaced by nulls. These scores should be ignored entirely.





Expected output

The results should include:

an list of the houses, from most innovative to least innovative

the innovation score of each house

the number of ideas submitted by each house

Other considerations

Reasonable performance is expected, but readability of the code is more

important. Use descriptive names and add docstrings and comments as needed.

You're free to use any 3rd-party library that seems suitable for the

task, keeping in mind how it might affecte the readability of the code for someone

who isn't familiar with it.

The code should include instructions on how to run it and get the results.

Any reasonably popular build tool is fine, or a single file with

side-effectful statements will also do. Use the tool that will allow

you to move to actually solving the problem.

There's no need to write a test suite for this exercise.



Solution by Abhinav Sharma ([email protected])

Design Considerations





Could have used :^private or defn- if this was a library oriented solution. However, as mentioned in the challenge description I've optimized for readibility rather than less number variables or more let bindings along with other deep clojure constructs. This would be caliberated as per the team standard.





Opted to deliver the base solution in the a single lumo.cljs file so as to avoid the hassle of setting up a build configs and slow startups.





I have only used the clojure standard library since, it's already there and I wanted the code to be usable by vanilla installation of lumo.





Didn't use spec at all.





Depending on the team's comfort level, standard and design choices, I might have opted for specter or medley to simplify things





Thoughts





A shared resource pool would be really helpful like Clojure - The Essential Reference or PurelyFunctional courses. This way, as a team we could be sure of each other's miminal knowledge base.





In production for nested queries, I think it might be worth trying out pathom pathom for traversing nested queries.





Solution-1: ClojureScript (via Lumo on Terminal)

Instructions to download and setup lumo

Lumo bundles ClojureScript and NodeJS together as a single binary. More info can be found at https://github.com/anmonteiro/lumo.

I've used it in the past to create the classic snake game using the browser's canvas API - luminus-snake

The core solution is based around a single file ./src/innovation_competition/lumo.cljs which is intended to be used as follows

> cd ./src/innovation_competition/

> lumo lumo.cljs



The solution would be printed out as like so



You could also just compile the lumo.cljs solution to NodeJS ready solution by using the bundled clojurescript compiler like done here luminus-snake/build_snake.cljs

Solution-2: Clojure (via REPLs)

The ./src/innovation_competition/core.clj file is the file which is meant to be used with a REPL as it contains commented code-snippets which could be used to explore the state of variables and the functionality of functions.





Terminal REPL

The simplest way to start a repl would be to do lein repl and it'll land you in the innovation_competition.core namespace. Feel free to play around 





Cursive via IntelliJ





You'll need  to open the project in the IntelliJ iwth Curisive plugin installed and the config the local nrepl like so



Once the REPL fires up, you can confirm the namespace you can use *ns*





Spacemacs

$$ Just open the core.clj and press ,' and you'd jack in right into the innovation_competition.core namespace





Solution-3: Python (via Jupyter)

This was a really fun problem to work with and I explored the solution using another tool I have, which is Python and so you can find the HTML or the Jupyter Notebook in the ./python directory.



Feedback





It was a wonderfully refreshing test and this ability of clojurians to try new things is the reason why I am so fond of clojure and it's community.





To avoid the multiple build tools you might need to install to evaluate various other submissions, you could ask people to use nextjournal as it comes with an in-built clojure and clojurescript repl. Think of it as a much better version of jupyter notebooks.





Things I tried





Adding rebel-readline library to the project to make the lein repl colorful but decided against adding another dependency.





Exploring the data via cognitect's REBL, couldn't make it work