You can read more about it in the <a href="https://pyjwt.readthedocs.io/en/latest/installation.html" class="external-link" target="_blank">PyJWT Installation docs</a>.

///

## Password hashing { #password-hashing }

"Hashing" means converting some content (a password in this case) into a sequence of bytes (just a string) that looks like gibberish.

     * method provides an atomic compare-and-update of some key's value.
     *
     * @param key the key under which to store the session data, must not be {@code null}
     * @param oldValue the expected data currently associated with the key, may be {@code null}
     * @param newValue the data to associate with the key, may be {@code null} to remove the mapping

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.core.io;

import static org.codelibs.core.misc.AssertionUtil.assertArgumentNotEmpty;
import static org.codelibs.core.misc.AssertionUtil.assertArgumentNotNull;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

            if (info.isUsableForChannel()) {
                remoteInterfaces.add(info);
            }
        }

        // Sort by score (best interfaces first)
        remoteInterfaces.sort((a, b) -> Integer.compare(b.getScore(), a.getScore()));

        log.debug("Discovered {} remote network interfaces", remoteInterfaces.size());
    }

                    }

                    if (!docMap.containsKey(Constants.SCORE)) {
                        final float score = hit.getScore();
                        if (Float.isFinite(score)) {
                            docMap.put(Constants.SCORE, score);
                        }
                    }

                    docMap.put(fessConfig.getIndexFieldId(), hit.getId());

    /**
     * The flag to check if the data store is alive.
     */
    protected boolean alive = true;

    /**
     * Register this data store.
     */
    public void register() {
        ComponentUtil.getDataStoreFactory().add(getName(), this);
    }

    /**
     * Get the name of this data store.
     * @return The name of this data store.
     */
    protected abstract String getName();

   * the same order. If you want a different order, consider using {@link ImmutableSortedMap} to
   * sort by keys, or call {@link #orderEntriesByValue(Comparator)}, which changes this builder to
   * sort entries by value.
   *
   * <p>Builder instances can be reused - it is safe to call {@link #buildOrThrow} multiple times to

   * the same order. If you want a different order, consider using {@link ImmutableSortedMap} to
   * sort by keys, or call {@link #orderEntriesByValue(Comparator)}, which changes this builder to
   * sort entries by value.
   *
   * <p>Builder instances can be reused - it is safe to call {@link #buildOrThrow} multiple times to

   * decoded. For example, some versions of the JDK decoder will accept "non-shortest form" byte
   * sequences, but encoding never reproduces these. Such byte sequences are <i>not</i> considered
   * well-formed.
   *
   * <p>This method returns {@code true} if and only if {@code Arrays.equals(bytes, new
   * String(bytes, UTF_8).getBytes(UTF_8))} does, but is more efficient in both time and space.
   */

Another big feature needed by APIs is data validation, making sure that the data is valid, given certain parameters. For example, that some field is an `int`, and not some random string. This is especially useful for incoming data.

Without a data validation system, you would have to do all the checks by hand, in code.