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function filter(list, predicate) {
// tworzymy pustÄ… listÄ™ tablicowÄ…
const result = [];
// iterujemy po kolejnych elementach listy
for (const element of list) {
// sprawdzamy, czy predykat zwraca prawdÄ™
if (predicate(element)) {
// jeśli tak, dodajemy element do wyniku
result.push(element)
}
}
// zwracamy elementy spełniające predykat
return result;
}
const list = [1, 2, 3, 4, 5];
console.log(filter(list, (value) => value % 2 === 0));
console.log(list.filter((value) => value % 2 === 0));
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