// from the cancelled operation and its own. This can cause one runnable to queue two tasks,
      // breaking the invariant this method relies on to iteratively run the next task after the
      // previous one completes.
      if (get() == RunningState.CANCELLED) {
        delegate = null;
        sequencer = null;
        return;
      }

    // wait for entries to expire, but don't call expireEntries
    ticker.advance(EXPIRING_TIME * 10, MILLISECONDS);

    // add a single unexpired entry
    cache.getUnchecked(KEY_PREFIX + 11);

    // collections views shouldn't expose expired entries
    assertThat(Iterators.size(cache.asMap().entrySet().iterator())).isEqualTo(1);
    assertThat(Iterators.size(cache.asMap().keySet().iterator())).isEqualTo(1);

   * navigable set is accomplished through the returned navigable set (or its views).
   *
   * <p>It is imperative that the user manually synchronize on the returned sorted set when
   * iterating over it or any of its {@code descendingSet}, {@code subSet}, {@code headSet}, or
   * {@code tailSet} views.
   *
   * {@snippet :
   * NavigableSet<E> set = synchronizedNavigableSet(new TreeSet<E>());

 *           }
 *         });
 * }
 *
 * <p>The returned cache implements all optional operations of the {@link LoadingCache} and {@link
 * Cache} interfaces. The {@code asMap} view (and its collection views) have <i>weakly consistent
 * iterators</i>. This means that they are safe for concurrent use, but if other threads modify the
 * cache after the iterator is created, it is undefined which of these changes, if any, are

 *  Fix: Change the return type of `MockWebServer.takeRequest()` to be nullable.
 *  Fix: Make `Call.clone()` public to Kotlin callers.


## Version 4.0.0-RC1

_2019-06-03_

 *  First stable preview of OkHttp 4.


## Version 3.x

[Change log](https://square.github.io/okhttp/changelog_3x/)


 [bom]: https://docs.gradle.org/6.2/userguide/platforms.html#sub:bom_import

Activar un entorno virtual también cambia un par de otras cosas, pero esta es una de las cosas más importantes que hace.

## Verificando un Entorno Virtual { #checking-a-virtual-environment }

Cuando revisas si un entorno virtual está activo, por ejemplo con:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console
$ which python

/home/user/code/awesome-project/.venv/bin/python
```

     *
     * Since we can't ACK settings on the current reader thread (the reader thread can't write) we
     * execute all peer settings logic on the writer thread. This relies on the fact that the
     * writer task queue won't reorder tasks; otherwise settings could be applied in the opposite
     * order than received.
     */
    fun applyAndAckSettings(
      clearPrevious: Boolean,

  @Override
  public boolean containsValue(@Nullable Object value) {
    return value != null && super.containsValue(value);
  }

  @Override
  public int size() {
    return size;
  }

  // views

  /**
   * Returns an immutable set of the distinct keys in this multimap, in the same order as they
   * appear in this multimap.
   */
  @Override
  public ImmutableSet<K> keySet() {

<img src="/img/async/parallel-burgers/parallel-burgers-04.png" class="illustration">

Puis le serveur/cuisinier 👨‍🍳 revient enfin avec vos burgers 🍔, après un long moment d'attente 🕙 devant le comptoir.

<img src="/img/async/parallel-burgers/parallel-burgers-05.png" class="illustration">

<img src="/img/async/concurrent-burgers/concurrent-burgers-05.png" class="illustration">

Mientras esperas y hablas con tu crush, de vez en cuando revisas el número mostrado en el mostrador para ver si ya es tu turno.

Luego, en algún momento, finalmente es tu turno. Vas al mostrador, obtienes tus hamburguesas y vuelves a la mesa.