public static <E extends @Nullable Object> ArrayList<E> newArrayList(
      Iterable<? extends E> elements) {
    checkNotNull(elements); // for GWT
    // Let ArrayList's sizing logic work, if possible
    return (elements instanceof Collection)
        ? new ArrayList<>((Collection<? extends E>) elements)
        : newArrayList(elements.iterator());
  }

  /**

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *

    return burgers
```

使用 `async def`，Python 知道在該函式內需要注意 `await`，並且它可以「暫停」 ⏸ 執行該函式，然後執行其他任務 🔀 後回來。

當你想要呼叫 `async def` 函式時，必須使用「await」。因此，這樣寫將無法運行：

```Python
# This won't work, because get_burgers was defined with: async def
burgers = get_burgers(2)
```

---

如果你正在使用某個函式庫，它告訴你可以使用 `await` 呼叫它，那麼你需要用 `async def` 定義*路徑操作函式*，如：

```Python hl_lines="2-3"
@app.get('/burgers')

              }
            }
          }
        }

        @Override
        public int read(byte[] buf, int off, int len) throws IOException {
          // Overriding this to work around the fact that InputStream's default implementation of
          // this method will silently swallow exceptions thrown by the single-byte read() method

    assertFailsWith<IOException> {
      getResponse(Request("http://-/foo.html".toHttpUrl()))
    }
  }

  // The request should work once and then fail.
  @Test
  fun getKeepAlive() {
    server.enqueue(MockResponse(body = "ABC"))

    // The request should work once and then fail.
    val connection1 = getResponse(newRequest("/"))
    val source1 = connection1.body.source()

   * desiredType}. The returned iterable's iterator does not support {@code remove()}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(type::isInstance).map(type::cast)}.
   * This does perform a little more work than necessary, so another option is to insert an
   * unchecked cast at some later point:
   *
   * {@snippet :
   * @SuppressWarnings("unchecked") // safe because of ::isInstance check

    // feature, exactly, but unavoidable (I think) and harmless
    Ordering<Integer> unusedL = objects.compound(numbers);

    // This correctly doesn't work:
    // Ordering<Object> unusedM = numbers.compound(objects);

    // Sadly, the following works in javac 1.6, but at least it fails for
    // eclipse, and is *correctly* highlighted red in IDEA.

    // feature, exactly, but unavoidable (I think) and harmless
    Ordering<Integer> unusedL = objects.compound(numbers);

    // This correctly doesn't work:
    // Ordering<Object> unusedM = numbers.compound(objects);

    // Sadly, the following works in javac 1.6, but at least it fails for
    // eclipse, and is *correctly* highlighted red in IDEA.

프로젝트 작업을 마쳤다면 가상 환경을 **비활성화**할 수 있습니다.

<div class="termy">

```console
$ deactivate
```

</div>

이렇게 하면 `python`을 실행할 때, 해당 가상 환경과 그 안에 설치된 패키지에서 실행하려고 하지 않습니다.

## 작업할 준비 완료 { #ready-to-work }

이제 프로젝트 작업을 시작할 준비가 되었습니다.



/// tip

위의 내용이 무엇인지 더 이해하고 싶으신가요?

계속 읽어보세요. 👇🤓

///

## 가상 환경을 왜 사용하나요 { #why-virtual-environments }

// If the pointer sent to done is non-nil AND the error
// is either nil or io.EOF the disk is considered good.
// So if unsure if the disk status is ok, return nil as a parameter to done.
// Shadowing will work as long as return error is named: https://go.dev/play/p/sauq86SsTN2
func (p *xlStorageDiskIDCheck) TrackDiskHealth(ctx context.Context, s storageMetric, paths ...string) (c context.Context, done func(int64, *error), err error) {