Dadurch erhalten Sie Editor-Unterstützung innerhalb Ihrer Funktion, mit Fehlerprüfungen, Codevervollständigung, usw.

///

## Daten-<abbr title="Auch bekannt als: Serialisierung, Parsen, Marshalling">Konversion</abbr> { #data-conversion }

Wenn Sie dieses Beispiel ausführen und Ihren Browser unter <a href="http://127.0.0.1:8000/items/3" class="external-link" target="_blank">http://127.0.0.1:8000/items/3</a> öffnen, sehen Sie als Response:

```JSON

SAM Conversions
---------------

When you use Java APIs from Kotlin you can operate on Java interfaces as if they were Kotlin
lambdas. The [feature][java_sams] is available for interfaces that define a Single Abstract Method
(SAM).

But when you use Kotlin APIs from Kotlin there’s no automatic conversion. Code that used SAM lambdas

        return new UpgradeResult(processedPoms, modifiedPoms, errorPoms);
    }

    /**
     * Performs the core model upgrade from current version to target version.
     * This includes namespace updates and module conversion using domtrip.
     * Returns the upgraded document.
     */
    private Document performModelUpgrade(
            Document pomDocument, UpgradeContext context, String currentVersion, String targetModelVersion) {

            return true;
        }

        // Check for identity or widening reference conversion
        if (actual != null && formal.isAssignableFrom(actual)) {
            return true;
        }

        // Check for boxing with widening primitive conversion. Note that
        // actual parameters are never primitives.
        if (formal.isPrimitive()) {

            if (isVersionBelow(currentVersion, upgrade.minVersion)) {
                Editor editor = new Editor(pomDocument);
                editor.setTextContent(versionElement, upgrade.minVersion);
                context.detail("Upgraded " + upgrade.groupId + ":" + upgrade.artifactId + " from " + currentVersion
                        + " to " + upgrade.minVersion + " in " + sectionName);
                return true;

// it returns false only if there is a conversion failure.
func (v Value) bytesToInt() (int64, bool) {
	bytes, _ := v.ToBytes()
	i, err := strconv.ParseInt(strings.TrimSpace(string(bytes)), 10, 64)
	return i, err == nil
}

// Converts untyped value into float. The bool return implies success
// - it returns false only if there is a conversion failure.
func (v Value) bytesToFloat() (float64, bool) {

que des vérifications d'erreur, de l'auto-complétion, etc.

///

## <abbr title="aussi appelé sérialisation, ou parfois parsing ou marshalling en anglais">Conversion</abbr> de données

Si vous exécutez cet exemple et allez sur <a href="http://127.0.0.1:8000/items/3" class="external-link" target="_blank">http://127.0.0.1:8000/items/3</a>, vous aurez comme réponse :

```JSON
{"item_id":3}

Conversion scheme:

    Source (English):

        <abbr title="{full phrase}">{abbreviation}</abbr>

    Result:

        <abbr title="{full phrase} – {translation of full phrase}">{abbreviation}</abbr>

   *
   * @param b the instance to convert; will never be null
   * @return the converted instance; <b>must not</b> be null
   * @throws UnsupportedOperationException if backward conversion is not implemented; this should be
   *     very rare. Note that if backward conversion is not only unimplemented but
   *     unimplement<i>able</i> (for example, consider a {@code Converter<Chicken, ChickenNugget>}),

type contentLengthRange struct {
	Min   int64
	Max   int64
	Valid bool // If content-length-range was part of policy
}

// PostPolicyForm provides strict static type conversion and validation for Amazon S3's POST policy JSON string.
type PostPolicyForm struct {
	Expiration time.Time // Expiration date and time of the POST policy.
	Conditions struct {  // Conditional policy structure.