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Comments (4)

andersoncpdq avatar andersoncpdq commented on August 12, 2024 1

Boa noite.

A questão 14 resolvi desta forma:

  Integer maxPrime = numbers.stream().filter(n -> {
      if (n < 2)
          return false;
      for (int i = 2; i < n; i++) {
          if (n % i == 0)
              return false;
      }
      return true;
  }).max(Comparator.naturalOrder()).orElse(null);

Já a questão 17 é bem semelhante:

    numbers.stream().filter(n -> {
        if (n < 2)
            return false;
        for (int i = 2; i < n; i++) {
            if (n % i == 0)
                return false;
        }
        return true;
    }).forEach(System.out::println);

Espero ter ajudado. =)

from ganhando_produtividade_com_stream_api_java.

cami-la avatar cami-la commented on August 12, 2024

Temos várias formas de resolver esses desafios, tá?
Segue uma issue que eu respondi, sugerindo uma forma de resolver: #11 (comment)

Veja se te ajuda. Qualquer dúvida é só falar. (:

from ganhando_produtividade_com_stream_api_java.

williamlimasilva avatar williamlimasilva commented on August 12, 2024

Caso alguém tenha duvidas no desafio 17 resolvi desse jeito
public static void main(String[] args) {
List numeros = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 5, 4, 3);
System.out.print("Numeros primos da lista: "+numeros.stream()
.filter(n -> {
if (n <= 1) return false;
for (int i = 2; i <= Math.sqrt(n); i++) {
if (n % i == 0) return false;
}
return true;
})
.toList());
}

from ganhando_produtividade_com_stream_api_java.

williamlimasilva avatar williamlimasilva commented on August 12, 2024

Quem tiver dificuldade para o Desafio 14
public static void main(String[] args) {
List numeros = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 5, 4, 3);
numeros.stream()
.filter(n -> {
if (n <= 1) return false;
for (int i = 2; i <= Math.sqrt(n); i++) {
if (n % i == 0) return false;
}
return true;
})
.max(Comparator.naturalOrder())
.ifPresentOrElse(n-> System.out.println("Maior numero primo da lista: "+n),()-> System.out.println("Não foi encontrado numeros primos"));
}

from ganhando_produtividade_com_stream_api_java.

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