}

        in 8..9 -> {
          id = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }
        }

        in 10..12 -> {
          id = null // 'id' on a line of its own.
        }

        in 13..14 -> {
          type = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }
        }

        in 15..17 -> {
          type = null // 'event' on a line of its own

    fun action() {
        val allPlatforms = platforms.get()
        val data = allPlatforms.map { platform ->
            PlatformData(
                name = platform.name,
                dirs = platform.children.takeIf { it.isNotEmpty() }?.map { it.name } ?: listOf(platform.name),
                uses = platform.uses.map { use -> allPlatforms.single { it.id == use }.name },
            )
        }

#### Fix it with `secrets.compare_digest()` { #fix-it-with-secrets-compare-digest }

But in our code we are actually using `secrets.compare_digest()`.

In short, it will take the same time to compare `stanleyjobsox` to `stanleyjobson` than it takes to compare `johndoe` to `stanleyjobson`. And the same for the password.

And that function takes parameters in the same way that *path operation functions* do.

/// tip

You'll see what other "things", apart from functions, can be used as dependencies in the next chapter.

///

Whenever a new request arrives, **FastAPI** will take care of:

* Calling your dependency ("dependable") function with the correct parameters.

The cashier goes to the kitchen.

You wait, standing in front of the counter 🕙, so that no one else takes your burgers before you do, as there are no numbers for turns.

<img src="/img/async/parallel-burgers/parallel-burgers-03.png" class="illustration">

As you and your crush are busy not letting anyone get in front of you and take your burgers whenever they arrive, you cannot pay attention to your crush. 😞

     * <li>Text is taken from item1</li>
     * <li>Readings are merged, maintaining uniqueness</li>
     * <li>Fields, tags, languages, and roles are merged, maintaining uniqueness</li>
     * <li>Kinds are merged, maintaining uniqueness</li>
     * <li>Frequencies (queryFreq, docFreq) are summed</li>
     * <li>Timestamp and userBoost are taken from item2 (newer values)</li>
     * </ul>
     *

Item ID: {{ id }}
```

{% endraw %}

...it will show the `id` taken from the "context" `dict` you passed:

```Python
{"id": id}
```

For example, with an ID of `42`, this would render:

```html
Item ID: 42
```

### Template `url_for` Arguments { #template-url-for-arguments }

   *
   * @param eventClass a class to assert that the returned event is an instance of, or null to
   *     take any event class.
   * @param elapsedMs the time in milliseconds elapsed since the immediately-preceding event, or
   *     -1L to take any duration.
   */
  fun takeEvent(
    eventClass: Class<out CallEvent>? = null,
    elapsedMs: Long = -1L,
  ): CallEvent {

You can declare path parameters and request body at the same time.

**FastAPI** will recognize that the function parameters that match path parameters should be **taken from the path**, and that function parameters that are declared to be Pydantic models should be **taken from the request body**.

{* ../../docs_src/body/tutorial003_py310.py hl[15:16] *}


## Request body + path + query parameters { #request-body-path-query-parameters }

   *
   * @param eventClass a class to assert that the returned event is an instance of, or null to
   *     take any event class.
   * @param elapsedMs the time in milliseconds elapsed since the immediately-preceding event, or
   *     -1L to take any duration.
   */
  fun takeEvent(
    eventClass: Class<out ConnectionEvent>? = null,
    elapsedMs: Long = -1L,
  ): ConnectionEvent {