app.js

//Ejercicio 1
const count = (str, char) => {
    console.log(`Recibidos ${str} y ${char}`);

    let result = 0;
    for (let index = 0; index < str.length; index++) {
        if (char == str[index]) {
            result++;
        }        
    }

    return result;    
}

console.log(count('Hellolllll', 'l'));

//Ejercicio 2
const filter = (arr) => {
    console.log(`Recibido ${arr}`);
    //Manualmente
    let result = [];
    arr.forEach(element => {
        if (element > 10) {
            result.push(element);
        }
    });
    return result;

    //con Array.filter
    // return arr.filter((elem) => elem > 10);
}

const data = [3, 12, 45, 7];
console.log(filter(data));


//Ejercicio 3
const hypotenuse = (a, b) => {
    //Manualmente
    const result = Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));

    //Con la funcion hypot de JS
    // const result = Math.hypot(a, b);

    return result;
}

console.log(hypotenuse(10, 13));