function excercise1(human) {
    console.log(human.name);
    console.log(human.age);
    console.log(human.fatherName);
    human.friends.forEach(console.log);
    human.hobbies.forEach(hobby => hobby())
}

const animal = {
    name: "Levi",
    age: 21,
    friends: ['Beni', 'Tamas', 'Zsombi'],
    fatherName: 'Béla',
    hobbies: [
        function () { console.log('Programozas') },
        function () { console.log('Peca') }
    ]
}

// excercise1(animal)



function isPrime(num) {
    if (isNaN(num) || !isFinite(num) || num % 2 === 0 || num <= 1 || Math.sqrt(num) * Math.sqrt(num) === num)
        return false;
    if (num === 2)
        return true
    for (let index = 3; index < Math.sqrt(num); index += 2) {
        if (num % index === 0)
            return false;
    }
    return true;
}

function range(a, b) {
    let array = []
    for (let index = a; index <= b; index++) {
        const element = index;
        array.push(element);
    }
    return array;
}


function excercise2() {
    /* TIP: there are some builtin helper functions like isNaN() and isFinite(), Math.sqrt() */
    const arr = range(4, 10); // should return [4,5,6,7,8,9,10]
    console.log(arr);
    console.log(isPrime(6));
    console.log(isPrime(6 / 5));
    console.log(isPrime(7));
    console.log(isPrime(997525853));
    console.log(isPrime(-10));
    console.log(isPrime('SURPISE!'));
    console.log(isPrime({ hello: [1, 2, 3] }));
}

// excercise2()

function makeCounter(number = 0) {
    let value = number
    return {
        value: function () { return value },
        increment: function () { value++; },
        decrement: function () { value-- },
    };
}



function excercise3() {
    const counter1 = makeCounter();
    const counter2 = makeCounter(10);

    console.log(0, counter1.value()); // 0

    counter1.increment();
    counter1.increment();
    console.log(2, counter1.value()); // 2

    counter1.decrement();
    console.log(1, counter1.value()); // 1
    console.log(10, counter2.value()); // 10
}

// excercise3()

function map(array, myFunc) {
    let newArray = [];
    for (let index = 0; index < array.length; index++) {
        const element = myFunc(array[index]);
        newArray.push(element);
    }
    return newArray;
}

function filter(array, myFunc) {
    let newArray = [];
    for (let index = 0; index < array.length; index++) {
        if (myFunc(array[index])){
            newArray.push(array[index]);
        }
    }
    return newArray;
}

function excercise4() {
    const array = [1, 2, 3, 4];
    console.log(map(array, (x) => x * 2), [2, 4, 6, 8]);
    console.log(map(array, (x) => x + 1), [2, 3, 4, 5]);
    console.log(map(array, (x) => `number ${x}`), ['number 1', 'number 2', 'number 3', 'number 4']);

    const array2 = range(3, 6)
    console.log(filter(array, (x) => x % 2 === 0), [2, 4]);
    console.log(filter(array, (x) => array2.includes(x)), [3, 4]);
}

excercise4();