Decision Formula

decisionFormula.js

function decisionFormula (activities, n) {
  var objMap = {};
  activities.forEach(item => {
    objMap[item] = 0;
  })

  for (var i = 0; i < 100; i++) {
    objMap[activities[Math.floor(Math.random() * activities.length)]]++;
  }
  
  var sortable = [];
  for (var activity in objMap) {
      sortable.push([activity, objMap[activity]]);
  }

  sortable.sort(function(a, b) {
      return b[1] - a[1];
  });

  var sortedList = sortable.map((item, i) => 
    `${i + 1}) ${item[0]} | ${item[1]} votes`
  );

  var activitiesToDo = sortedList.splice(0,n).join('\n')
  var missedActivities = sortedList.join('\n')

  return `
Hurray! You're going to do these Activities!
--------------------------------------
${activitiesToDo}

======================================

So close! but maybe do these activities another time:
--------------------------------------
${missedActivities}
  `
}