fa-flask:before{content:"\f0c3"}.fa-flickr:before{content:"\f16e"}.fa-flipboard:before{content:"\f44d"}.fa-flushed:before{content:"\f579"}.fa-fly:before{content:"\f417"}.fa-folder:before{content:"\f07b"}.fa-folder-minus:before{content:"\f65d"}.fa-folder-open:before{content:"\f07c"}.fa-folder-plus:before{content:"\f65e"}.fa-font:before{content:"\f031"}.fa-font-awesome:before{content:"\f2b4"}.fa-font-awesome-alt:before{content:"\f35c"}.fa-font-awesome-flag:before{content:"\f425"}.fa-font-awesome-l...

    public T get() {
      // Another variant of Double Checked Locking.
      //
      // We use two volatile reads. We could reduce this to one by
      // putting our fields into a holder class, but (at least on x86)
      // the extra memory consumption and indirection are more
      // expensive than the extra volatile reads.
      long nanos = expirationNanos;
      long now = System.nanoTime();

  }

  @J2ktIncompatible // Kotlin Native's regex is based on Apache Harmony, like old Android
  @GwtIncompatible // java.util.regex.Pattern
  @AndroidIncompatible // Bug in older versions of Android we test against, since fixed.
  public void testPatternSplitLookBehind() {
    if (!CommonPattern.isPcreLike()) {
      return;
    }
    String toSplit = ":foo::barbaz:";

Aber Sie möchten diese vielleicht vom Resultat ausschließen, wenn Sie gar nicht gesetzt wurden.

Wenn Sie zum Beispiel Modelle mit vielen optionalen Attributen in einer NoSQL-Datenbank haben, und Sie möchten nicht ellenlange JSON-Responses voller Defaultwerte senden.

### Den `response_model_exclude_unset`-Parameter verwenden

Sie können den *Pfadoperation-Dekorator*-Parameter `response_model_exclude_unset=True` setzen:

	r2b := make([]int, len(readers))
	for i := range r2b {
		r2b[i] = i
	}
	bufs := make([][]byte, len(readers))
	shardSize := int(e.ShardSize())
	var b []byte

	// We should always have enough capacity, but older objects may be bigger
	// we do not need stashbuffer for them.
	if globalBytePoolCap.Load().WidthCap() >= len(readers)*shardSize {
		// Fill buffers
		b = globalBytePoolCap.Load().Get()
		// Seed the buffers.

*/
package gmp

/*
#cgo LDFLAGS: -lgmp
#include <gmp.h>
#include <stdlib.h>

// gmp 5.0.0+ changed the type of the 3rd argument to mp_bitcnt_t,
// so, to support older versions, we wrap these two functions.
void _mpz_mul_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
	mpz_mul_2exp(a, b, n);
}
void _mpz_div_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
	mpz_div_2exp(a, b, n);
}

            assertEquals(Math.floorDiv(p, q), LongMath.divide(p, q, mode));
          }
        }
      }
    }
  }

  @GwtIncompatible // TODO
  @AndroidIncompatible // Bug in older versions of Android we test against, since fixed.
  public void testDivNonZeroExact() {
    for (long p : NONZERO_LONG_CANDIDATES) {
      for (long q : NONZERO_LONG_CANDIDATES) {

    class PerformanceTests {

        @Test
        @DisplayName("Should handle rapid successive encodes")
        void testRapidSuccessiveEncodes() {
            String path = "\\\\server\\share\\folder\\file.dat";
            buffer = new DfsReferralRequestBuffer(path, 3);

            byte[] dst = new byte[buffer.size()];

            // Perform many rapid encodes
            for (int i = 0; i < 10000; i++) {

            assertEquals("share", concreteShare);
        }

        @Test
        @DisplayName("Should get path")
        void testGetPath() {
            String path = "folder\\subfolder\\file.txt";

            // Test with mock
            when(mockReferralData.getPath()).thenReturn(path);
            assertEquals(path, mockReferralData.getPath());

{* ../../docs_src/query_params/tutorial002.py hl[9] *}

Ici, le paramètre `q` sera optionnel, et aura `None` comme valeur par défaut.

/// check | Remarque

On peut voir que **FastAPI** est capable de détecter que le paramètre de chemin `item_id` est un paramètre de chemin et que `q` n'en est pas un, c'est donc un paramètre de requête.

///

/// note