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Jan 18th, 2022
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  1. function solve(arr) {
  2.     let listOfCourses = {};
  3.  
  4.     for (let element of arr) {
  5.         if (!element.includes(`[`)) {
  6.             let [courseName, capacity] = element.split(`: `);
  7.             if (!listOfCourses.hasOwnProperty(courseName)) {
  8.                 listOfCourses[courseName] = {
  9.                     capacity: Number(capacity),
  10.                     students: [],  //here
  11.                 }
  12.             } else {
  13.                 listOfCourses[courseName].capacity += Number(capacity);
  14.             }
  15.         } else if (element.includes(`with email`)) {
  16.             element = element.split(`[`);
  17.             let userName = element.shift();
  18.             element = element[0].split(`]`);
  19.             let creditCount = Number(element.shift());
  20.             let temp = element[0].split(` `);
  21.             let email = temp[3];
  22.             let courseName = element[0].split(` joins `)[1];
  23.             if (listOfCourses.hasOwnProperty(courseName) && listOfCourses[courseName].capacity > 0) {
  24.                 listOfCourses[courseName].students.push({ //here
  25.                     userName: userName,                     //here
  26.                     creditCount: creditCount,
  27.                     email: email,
  28.                 })
  29.                 listOfCourses[courseName].capacity--;
  30.             }
  31.         }
  32.     }
  33.     let sortedByCapacity = Object.entries(listOfCourses)
  34.         .sort((a, b) => Object.keys(b[1].students).length - Object.keys(a[1].students).length);
  35.     for (let element of sortedByCapacity) {
  36.         console.log(`${element[0]}: ${element[1].capacity} places left`);
  37.         element[1].students.sort((a, b) => b.creditCount - a.creditCount).forEach(x => console.log(`--- ${x.creditCount}: ${x.userName}, ${x.email}`)); //here
  38.     }
  39. }
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