Random exam generator

Question

I've written a short Random Exam Generator program. There are 6 days, 3 time slots per day. One day can not have more than 2 exams. There will be 5 exams in total.

I am fairly new to programming so I would like some feedback on how well this code is written, and if there are any ways to improve it.

var exam_days = 
 { 0: 0, 
 1: 0, 
 2: 0, 
 3: 0, 
 4: 0, 
 5: 0 };
var exam_array = []; 
function generateSchedule() {
 for (var i = 0; exam_array.length < 5; i++){
 var time = getRandomInt(0,2);
 var day = getRandomInt(0,5);
 var exam_id = "exam-" + time + day; 
 if (dayAvailable(day, exam_days) && uniqueExam(exam_id, exam_array)) {
 exam_days[day] += 1; 
 exam_array.push(exam_id); 
 document.getElementById(exam_id).style.background = "green"; 
 }
 } 
}
function getRandomInt(min, max) {
 return Math.floor(Math.random() * (max - min + 1)) + min;
}
function dayAvailable(date, exam_days) {
 if (exam_days[date] < 2) {
 return true;
 }
 return false; 
}
function uniqueExam(exam, exam_array)
{
 var count = exam_array.length;
 for (var i = 0; i < count; i++)
 {
 if (exam_array[i] === exam) 
 return false;
 }
 return true; 
}

Answer 1

Library functions usage

The unique_exam function is basically checking if the exam is in the array or not and returning false if it is not, the includes method is what You need.

return ! exam_array.includes (exam)

Inline

dayAvailable

Should be inlined as it boils down to just one comparison, instead the number of exams per day should be saved as a constant.