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Hw 3 #3

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15 changes: 15 additions & 0 deletions task_3/index.html
Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>task3</title>
</head>
<body>
<header></header>
<main></main>
<footer></footer>
<script src="js/main.js" defer></script>
</body>
</html>
57 changes: 57 additions & 0 deletions task_3/js/main.js
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"use strict"
// Получить от юзера число.
// Получить сумму квадаров всех чисел от 1 до числа, которое ввел юзер. Пример:
// Юзер ввел 4
// (1 * 1) + (2 * 2) + (3 * 3) + (4 * 4) = 30
// Вывести в консоль результат
// Привести во вторую степерь можно через оператор **. 3 ** 2 = 9
const num = Number(prompt('Enter your number'));
alert (num);

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alert(num);


const sumSquare = (num) => {
let sum = 0;
for(let i = 1; i <= num; i++){
sum += i**2;
}
console.log(`The sum is ${sum}`);
}

sumSquare(num);

// Есть массив [3, 5, 12, 9, 23, 93, 17]
// Отфильтровать его так, чтобы остались только те числа, которые больше 2 и меньше 20. И потом получить их сумму.
const arr = [3, 5, 12, 9, 23, 93, 17];

const arrFilter = arr => {
const filterArr = arr.filter(el => el > 2 && el < 20);
const sum = filterArr.reduce((acc,item) => acc + item);

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const sum = filterArr.reduce((acc,item) => acc + item);


return Array.isArray(arr) ? sum : 'Error is not an array';
}

console.log(arrFilter(arr));

// Дан массив [[1, 6, 3, '6'], [10, 15, 13, '10']]. Найти сумму элементов, которые являются числами и которые кратны двум
const list = [[1, 6, 3, '6'], [10, 15, 13, '10']];
const arrTransform = arr => {

const flatArr = arr.flat();
const filteredData = flatArr.filter(el => typeof el === 'number' && el % 2 === 0);
const totalSum = filteredData.reduce((acc, item) => acc + item);

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const totalSum = filteredData.reduce((acc, item) => acc + item);


return Array.isArray(arr) ? totalSum : 'Error is not an array';
}

console.log(arrTransform(list));

// Написать функцию, которая устанавливает новые свойства в объект.

const keys = prompt('Enter your key');
const value = prompt('Enter your value');

const addPropeties = (key,value,object) => typeof object === 'object' && !object.hasOwnProperty(key)
? { ...object , [key]:value} : 'Уже есть';

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что с форматированием?

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Prettier решил попробывать , потом понял что не очень идея и отключил, сейчас исправлю оформление!


const person = {name:'Vlad'};
const obj = addPropeties(keys,value,person);
console.log(obj);