JavaScript Task
Given an array. Print to the console all options for permuting the elements of this array.
Difficulty: Hard😤

const arr = [1, 2, 3, 4];

#css #border #cheatsheet

What will this code output? And why?
Difficulty: Average🤨

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

const result = numbers.map(num => {
    if (num % 2 === 0) {
        return num * 2;
    } else {
        return num * 3;
    }
}).reduce((acc, curr) => acc + curr);

console.log(result);

Find errors in the code.
Difficulty: Average🤨

class Rectangle {
    constructor(width, height) {
        this.width = width;
        this.height = height;
    }

    getArea() {
        return width * height;
    }
}

const rect = new Rectangle(5, 10);
console.log("Area:", rect.getArea());

Useful CSS Tips

Outline

If you encounter issues with the positioning or visibility of elements on a page, this rule helps you instantly see all the blocks, their borders, and structure. It’s especially useful when working with complex layouts where elements might overlap or disappear.

* {
    outline: 4px solid green !important;
}

#css #tips #outline

JavaScript Task
Check that this string consists of numbers only.
Difficulty: Easy😁

string = "1234567890"

Find errors in the code.
Given an array of numbers. Remove numbers from it that have two or more zeros.
Difficulty: Hard😤

let numbers = [102, 304, 500, 1002, 20, 404, 80, 7];

function hasTwoOrMoreZeros(num) {

    return (num.toString().match(/0/g) && []).length > 2; 
}

let filteredNumbers = numbers.filter(num => !hasTwoOrMoreZeros(num));

console.log(filteredNumbers);

Find error in the code.
Difficulty: Easy😁

function addNumbers(a, b) {
    return a + b;
}

let result = addNumbers(5, '10');

console.log('Результат: ' + result);

#css #cursor #tips

JavaScript Task
Given an array of numbers. Increase each number in the array by 10 percent.
Difficulty: Easy😁

let numbers = [100, 200, 300, 400, 500];