Helsinki city-bike distance calculator

citybike-distance.js

// Calculates yearly distances you pedaled with Helsinki city bikes. 
// Paste to browser console at https://kaupunkipyorat.hsl.fi/fi/activity
[...document.querySelectorAll('.activity-feed-item')].reduce((memo, current) => {
  const departureText = current.querySelector('.departure-date').innerText
  const [date] = departureText.split(' ')
  const [,,year] = date.split('.')
  const yearDistance = memo[year] || 0

  const distanceText = current.querySelector('.covered-distance').innerText
  const [distance] = distanceText.split('km') 
  const currentDistance = parseFloat(distance)
  const yearDistanceWithCurrent = {[year]: yearDistance + currentDistance}
  
  return {...memo, ...yearDistanceWithCurrent}
}, {})