rarity hypothesis

rarity.js

let editionCount;

// count the editions
editionCount = window.localStorage.getItem('editionCount');
editionCount = editionCount ? Number(editionCount) + 1 : 1;
window.localStorage.setItem('editionCount', editionCount);

// create inspector
const inspector = document.createElement('div');
inspector.style.width = '100%';
inspector.style.backgroundColor = 'rgb(255,255,255,0.6)';

const rarities = []

// read all features
for (const feature in window.$fxhashFeatures) {
  const value = window.$fxhashFeatures[feature];
  pushValue(feature, value);
  const rarity = getValuePercentage(feature, value);

  rarities.push(rarity);

  const feat = document.createElement('div');
  feat.textContent = `%${rarity} - ${feature}: ${value}`;
  inspector.appendChild(feat);
}

const getMax = (a, b) => Math.max(a, b);
const getMin = (a, b) => Math.min(a, b);
const getSum = (a, b) => a + b;
const max = rarities.reduce(getMax, 0);
const min = rarities.reduce(getMin, 110);
const mean = rarities.reduce(getSum, 0) / rarities.length;

const minDiv = document.createElement('div');
minDiv.textContent = `minimum rarity ${min}`;
inspector.appendChild(minDiv);

const meanDiv = document.createElement('div');
meanDiv.textContent = `mean rarity ${mean}`;
inspector.appendChild(meanDiv);

const maxDiv = document.createElement('div');
maxDiv.textContent = `max rarity ${max}`;
inspector.appendChild(maxDiv);

const button = document.createElement('button');
button.onclick = () => {
  window.localStorage.clear();
}
button.textContent = "CLEAR COUNT";
inspector.appendChild(button);

document.body.appendChild(inspector);

function pushValue(id, value) {
  let current = window.localStorage.getItem(id);
  if (!current) {
    current = {};
  } else {
    current = JSON.parse(current);
  }
  current[value] = current[value] ? Number(current[value]) + 1 : 1;

  window.localStorage.setItem(id, JSON.stringify(current));
}

function getValuePercentage(id, value) {
  let current = window.localStorage.getItem(id);
  current = JSON.parse(current);

  const tot = current[value] / editionCount;
  return Math.round(tot * 10000) / 100;
}