Method DefaultIfEmpty

observable_operator.go:710–717

DefaultIfEmpty returns an Observable that emits the items emitted by the source Observable or a specified default item if the source Observable is empty.

(defaultValue interface{}, opts ...Option)

// DefaultIfEmpty returns an Observable that emits the items emitted by the source
// Observable or a specified default item if the source Observable is empty.
func (o *ObservableImpl) DefaultIfEmpty(defaultValue interface{}, opts ...Option) Observable {
	return observable(o.parent, o, func() operator {
		return &defaultIfEmptyOperator{
			defaultValue: defaultValue,
			empty:        true,
		}
	}, true, false, opts...)
}

type defaultIfEmptyOperator struct {
	defaultValue interface{}