Code used to analyse StateOfJS2020 data

index.js

const participants = require("./data.json");

const isAware = (experience) => experience !== "never_heard";
const isInterested = (experience) =>
  experience === "interested" || experience === "would_use";

const numParticipantsMoreThan = (dictNumTechToNumParticipants, num) => Object
  .keys(dictNumTechToNumParticipants)
  .filter(n => n > num)
  .reduce((acc, n) => acc + dictNumTechToNumParticipants[n], 0)

const percent = (num) => Math.round(num * 10000) / 100

const { aware, interested } = participants.reduce((acc, participant) => {
  const { aware = {}, interested = {} } = acc;
  const experiences = !participant.tools
    ? []
    : Object.values(participant.tools).map((tool) => tool.experience);

  const numAware = experiences.filter(isAware).length;
  const numInterested = experiences.filter(isInterested).length;

  if (!aware[numAware]) aware[numAware] = 0;
  if (!interested[numInterested]) interested[numInterested] = 0;

  aware[numAware] = (aware[numAware] || 0) + 1;
  interested[numInterested] = (interested[numInterested] || 0) + 1;

  return {
    aware,
    interested,
  };
}, {});

const totalParticipants = participants.length
const totalAwareOfMoreThan5 = numParticipantsMoreThan(aware, 5)
const totalAwareOfMoreThan10 = numParticipantsMoreThan(aware, 10)
const totalAwareOfMoreThan20 = numParticipantsMoreThan(aware, 20)
const totalInterestedInMoreThan5 = numParticipantsMoreThan(interested, 5)
const totalInterestedInMoreThan10 = numParticipantsMoreThan(interested, 10)
const totalInterestedInMoreThan20 = numParticipantsMoreThan(interested, 20)

console.log('total', totalParticipants)
console.log('aware_more_than_5', percent(totalAwareOfMoreThan5 / totalParticipants))
console.log('aware_more_than_10', percent(totalAwareOfMoreThan10 / totalParticipants))
console.log('aware_more_than_20', percent(totalAwareOfMoreThan20 / totalParticipants))
console.log('interested_more_than_5', percent(totalInterestedInMoreThan5 / totalParticipants))
console.log('interested_more_than_10', percent(totalInterestedInMoreThan10 / totalParticipants))
console.log('interested_more_than_20', percent(totalInterestedInMoreThan20 / totalParticipants))

Data:

https://www.kaggle.com/sachag/state-of-js

Output:

total 99715
aware_more_than_5 96.2
aware_more_than_10 93.05
aware_more_than_20 50.71
interested_more_than_5 91.74
interested_more_than_10 63.93
interested_more_than_20 13.53