privat24: calculate expenses by regexp

calculateExpenses.js

// tab charts -> scroll down -> inspect table (iframe)
// taxi example

(function calculateExpenses(regexp) {
  regexp = new RegExp(regexp, 'i');
  const allDescs = document.querySelectorAll('.t_descr'); console.log(allDescs);
  const descs = Array.prototype.filter.call(allDescs, desk => regexp.test(desk.innerText)); console.log(descs);
  const monies = descs.map(desk => +desk.nextSibling.childNodes[0].childNodes[0].innerText.slice(1)); console.log(monies);
  const sum = monies.reduce((sum, money) => sum + money, 0);
  return `${sum.toFixed(2)} грн`;
})('(таксі|taxi|uber|uklon)');