this.endDate = this.oldEndDate.clone();
            }

            //if a new date range was selected, invoke the user callback function
            if (!this.startDate.isSame(this.oldStartDate) || !this.endDate.isSame(this.oldEndDate))
                this.callback(this.startDate.clone(), this.endDate.clone(), this.chosenLabel);

            //if picker is attached to a text input, update it

      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))
          .build(),
      )
    val completionLatch = CountDownLatch(1)
    val callback: Callback =
      object : Callback {
        override fun onFailure(
          call: Call,
          e: IOException,
        ) {
          completionLatch.countDown()
        }

        override fun onResponse(

    /**
     * Validates the password and confirmation fields in the form for user creation and update.
     *
     * @param form the form containing password and confirmation fields
     * @param validationErrorLambda callback to report validation errors
     */
    protected void verifyPassword(final CreateForm form, final VaErrorHook validationErrorLambda) {
        if (form.crudMode == CrudMode.CREATE && StringUtil.isBlank(form.password)) {

In previous versions of NodeJS / Browser JavaScript, you would have used "callbacks". Which leads to "callback hell".

## Coroutines { #coroutines }

		case <-ctx.Done():
			r.err = ctx.Err()
			return ctx.Err()
		case dst <- meta:
		}
	}
}

// readFn will return all remaining objects
// and provide a callback for each entry read in order
// as long as true is returned on the callback.
func (r *metacacheReader) readFn(fn func(entry metaCacheEntry) bool) error {
	r.checkInit()
	if r.err != nil {
		return r.err
	}
	if r.current.name != "" {

package callbacks

import (
	"reflect"
	"sort"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
)

func SetupUpdateReflectValue(db *gorm.DB) {
	if db.Error == nil && db.Statement.Schema != nil {
		if !db.Statement.ReflectValue.CanAddr() || db.Statement.Model != db.Statement.Dest {
			db.Statement.ReflectValue = reflect.ValueOf(db.Statement.Model)

 * **Synchronous:** your thread blocks until the response is readable.
 * **Asynchronous:** you enqueue the request on any thread, and get [called back](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-callback/) on another thread when the response is readable.

        public RequestOptionCall<DeleteRequestBuilder> deleteOption() {
            return deleteOption;
        }
    }

    @FunctionalInterface
    public interface RequestOptionCall<OP> {
        void callback(OP op);
    }

        public RequestOptionCall<DeleteRequestBuilder> deleteOption() {
            return deleteOption;
        }
    }

    @FunctionalInterface
    public interface RequestOptionCall<OP> {
        void callback(OP op);
    }

        public RequestOptionCall<DeleteRequestBuilder> deleteOption() {
            return deleteOption;
        }
    }

    @FunctionalInterface
    public interface RequestOptionCall<OP> {
        void callback(OP op);
    }