* file is detected. The number of bytes read is returned, possibly zero. Does not close the
   * stream.
   *
   * <p>A caller can detect EOF if the number of bytes read is less than {@code len}. All subsequent
   * calls on the same stream will return zero.
   *
   * <p>If {@code b} is null, a {@code NullPointerException} is thrown. If {@code off} is negative,

 *   <li>activeMinPort: The minimum port number for active mode FTP.</li>
 *   <li>activeMaxPort: The maximum port number for active mode FTP.</li>
 *   <li>autodetectEncoding: Whether to automatically detect UTF-8 encoding.</li>
 *   <li>connectTimeout: The timeout for establishing a connection to the FTP server.</li>
 *   <li>dataTimeout: The timeout for data transfers.</li>

    the OkHttp version in custom `User-Agent` headers.

 *  Fix: Don't crash when running as a plugin in Android Studio Canary 4.1. To enable
    platform-specific TLS features OkHttp must detect whether it's running in a JVM or in Android.
    The upcoming Android Studio runs in a JVM but has classes from Android and that confused OkHttp!

For example:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip

pkg net/url, type URL struct, RawPath string
pkg os, func LookupEnv(string) (string, bool)
pkg os/signal, func Ignore(...os.Signal)
pkg os/signal, func Reset(...os.Signal)
pkg reflect, func ArrayOf(int, Type) Type
pkg reflect, func FuncOf([]Type, []Type, bool) Type
pkg runtime, func ReadTrace() []uint8
pkg runtime, func StartTrace() error
pkg runtime, func StopTrace()
pkg runtime, type MemStats struct, GCCPUFraction float64

		//
		// However, this check ensures that a certificate with an invalid key usage
		// gets rejected even when we skip certificate verification. This helps
		// clients detect malformed certificates during testing instead of e.g.
		// a self-signed certificate that works while a comparable certificate
		// issued by a trusted CA fails due to the MinIO server being less strict

 *  Fix: Don't use SPDY/3 style header concatenation for HTTP/2 request headers.
    This could have corrupted requests where multiple headers had the same name,
    as in cookies.
 *  Fix: Reject bad characters in the URL hostname. Previously characters like
    `\0` would cause a late crash when building the request.
 *  Fix: Allow interceptors to change the request method.

 *  New: Handy constants for `Headers.EMPTY`, `RequestBody.EMPTY`, and `ResponseBody.EMPTY`.

 *  New: OkHttp now calls `StrictMode.noteSlowCall()` when initializing TLS on Android. Use
    `StrictMode` to detect if your `OkHttpClient` is being initialized on the main thread.

 *  Upgrade: [Okio 3.12.0][okio_3_12_0].

 *  Upgrade: [Kotlin 2.1.21][kotlin_2_1_21].

   * its bottom {@value CompactHashing#HASH_TABLE_BITS_MAX_BITS} bits, with a modification count in
   * the remaining bits that is used to detect concurrent modification during iteration.
   */
  private transient int metadata;

  /** The number of elements contained in the set. */
  private transient int size;

## 에디터 설정

에디터를 사용할 경우, 앞서 만든 가상 환경을 사용하도록 설정하는 것이 좋습니다. (대부분의 에디터는 자동으로 감지하기도 합니다.)
이렇게 하면 자동 완성 기능이나 코드 내 오류 표시 기능을 제대로 사용할 수 있습니다.

예시:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | 팁