// const f = x => x % 2;
// const f = x => x / 2;
const f =x => confirm(x);
function myFilter(arr, f) {
    let result = [];
    for (let item of arr) {
        if (f(item)) { result.push(item)}
    }
    return result;
}

// console.log(myFilter([1, 2, 3, 4, 5], f));
console.log(myFilter(["холодно?", "сонно?"], f));