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// Q1. make a string out of an array

{

const fruits = ['apple', 'banana', 'orange'];

const result = fruits.join(',');

console.log(result);

}

// Q2. make an array out of a string

{

const fruits = '🍎, 🥝, 🍌, 🍒';

const result = fruits.split(',');

console.log(result);

}

// Q3. make this array look like this: [5, 4, 3, 2, 1]

{

const array = [1, 2, 3, 4, 5];

const result = array.reverse();

console.log(result);

console.log(array);

}

// Q4. make new array without the first two elements

{

const array = [1, 2, 3, 4, 5];

const result = array.slice(2, 5);

console.log(result);

console.log(array);

}

class Student {

constructor(name, age, enrolled, score) {

this.name = name;

this.age = age;

this.enrolled = enrolled;

this.score = score;

}

}

const students = [

new Student('A', 29, true, 45),

new Student('B', 28, false, 80),

new Student('C', 30, true, 90),

new Student('D', 40, false, 66),

new Student('E', 18, true, 88),

];

// Q5. find a student with the score 90

{

const result = students.find((student) => student.score === 90);

console.log(result);

}

// Q6. make an array of enrolled students

{

const result = students.filter((student) => student.enrolled);

console.log(result);

}

// Q7. make an array containing only the students' scores

// result should be: [45, 80, 90, 66, 88]

{

const result = students.map((student) => student.score);

console.log(result);

}

// Q8. check if there is a student with the score lower than 50

{

console.clear();

const result = students.some((student) => student.score < 50);

console.log(result);

const result2 = !students.every((student) => student.score >= 50);

console.log(result2);

}

console.clear();

// Q9. compute students' average score

{

const result = students.reduce((prev, curr) => prev.score + curr.score);

console.log(result / students.length);

}

// Q10. make a string containing all the scores

// result should be: '45, 80, 90, 66, 88'

{

const result = students

.map((student) => student.score)

.filter((score) => score >= 50)

.join();

console.log(result);

}

// Bonus! do Q10 sorted in ascending order

// result should be: '45, 66, 80, 88, 90'

{

const result = students

.map((student) => student.score)

.sort((a, b) => b - a)

.join();

console.log(result);

}