@Override
    public boolean contains(@CheckForNull Object target) {
      return indexOf(target) >= 0;
    }

    @Override
    public int indexOf(@CheckForNull Object target) {
      return target instanceof Integer ? parent.indexOf((Integer) target) : -1;
    }

    @Override
    public int lastIndexOf(@CheckForNull Object target) {
      return target instanceof Integer ? parent.lastIndexOf((Integer) target) : -1;

---

	quitCh chan struct{}
}

// ID - returns target ID.
func (target *MySQLTarget) ID() event.TargetID {
	return target.id
}

// Name - returns the Name of the target.
func (target *MySQLTarget) Name() string {
	return target.ID().String()
}

// Store returns any underlying store if set.
func (target *MySQLTarget) Store() event.TargetStore {
	return target.store
}

## 🔗 ⏮️ 📕

👆 💪 🔗 ⏮️ <a href="https://tiangolo.com" class="external-link" target="_blank">👤 (🇹🇦 🇩🇬 / `tiangolo`)</a>, 📕.

👆 💪:

* <a href="https://github.com/tiangolo" class="external-link" target="_blank">⏩ 👤 🔛 **📂**</a>.
    * 👀 🎏 📂 ℹ 🏗 👤 ✔️ ✍ 👈 💪 ℹ 👆.
    * ⏩ 👤 👀 🕐❔ 👤 ✍ 🆕 📂 ℹ 🏗.

}

func (target *NATSTarget) isActive() (bool, error) {
	var connErr error
	if target.args.Streaming.Enable {
		if target.stanConn == nil || target.stanConn.NatsConn() == nil {
			target.stanConn, connErr = target.args.connectStan()
		} else if !target.stanConn.NatsConn().IsConnected() {
			return false, store.ErrNotConnected
		}
	} else {
		if target.natsConn == nil {

   * <p>Note that this always returns {@code -1} when {@code target} contains {@code NaN}.
   *
   * @param array the array to search for the sequence {@code target}
   * @param target the array to search for as a sub-sequence of {@code array}
   */
  public static int indexOf(double[] array, double[] target) {
    checkNotNull(array, "array");
    checkNotNull(target, "target");
    if (target.length == 0) {
      return 0;
    }

---

    assertFalse(three.hasNext());

    three = registry.getSubscribers("");

    registry.unregister(s2);

    assertEquals(s1, three.next().target);
    assertEquals(s2, three.next().target);
    assertEquals(o1, three.next().target);
    assertFalse(three.hasNext());

    Iterator<Subscriber> two = registry.getSubscribers("");
    assertEquals(s1, two.next().target);

}

// ID - returns target ID.
func (target *WebhookTarget) ID() event.TargetID {
	return target.id
}

// IsActive - Return true if target is up and active
func (target *WebhookTarget) IsActive() (bool, error) {
	if err := target.init(); err != nil {
		return false, err
	}
	return target.isActive()
}

// errNotConnected - indicates that the target connection is not active.

## Önce Öğreticiyi Okuyun

[Tutorial - User Guide](../tutorial/index.md){.internal-link target=_blank} sayfasındaki bilgilerle **FastAPI**'nın çoğu özelliğini kullanabilirsiniz.

Sonraki bölümler bu sayfayı okuduğunuzu ve bu ana fikirleri bildiğinizi varsayarak hazırlanmıştır.

## Diğer Kurslar