How to use

close_rate

function

in

Array

const closeRate = (data) => {
  const closed = aggregate(data.closed.map(item => ({
   created_at: new Date(item.created_at).setHours(0, 0, 0, 0)
  })), 'created_at');

  const open = aggregate(data.open.map(item => ({
   created_at: new Date(item.created_at).setHours(0, 0, 0, 0)
  })), 'created_at');

  const rate = Object.keys(closed).map(key => {
   const closedKey = closed[key] || 0;
   const openKey = open[key] || 0;
   const closeRate = closedKey / (closedKey + openKey);
   return {
    created_at: key,
    close_rate: closeRate
   };
  });
  return {
   lowest: rate.reduce((acc, curr) => acc.close_rate < curr.close_rate ? acc : curr, []),
   highest: rate.reduce((acc, curr) => acc.close_rate > curr.close_rate ? acc : curr, []),
   average: data.closed.length / (data.open.length + data.closed.length) || 0
  };
 }