class User
def say_secret_with_self
self.secret
end
protected
def secret
"secret"
end
end
u = User.new
p u.say_secret_with_self # => "secret"
我听说受保护的方法只能由继承的成员访问。但是以上是可能的红宝石。是正确的代码吗?
答案 0 :(得分:4)
是的,这是正确的代码。该类的实例能够调用self方法,即使它们是protected
。 protected/private
方法是从外部隐藏的,而不是从内部隐藏的。
答案 1 :(得分:1)
方法0 rows
仍然受到保护。您不能从您的班级(或继承的班级)外部调用它。但您可以从 live_grid.addOnScrollListener(new PaginationScrollListener(gridLayoutManager) {
@Override
protected void loadMoreItems() {
// TODO: 07/11/16 check if totalPage > 1 before triggering next load
Log.d(TAG, "live_grid loadMoreItems.......");
int visibleItemCount = gridLayoutManager.getChildCount();
int totalItemCount = gridLayoutManager.getItemCount();
int firstVisibleItemPosition = gridLayoutManager.findFirstVisibleItemPosition();
Log.d(TAG, "visibleItemCount: "+ visibleItemCount);
Log.d(TAG, "totalItemCount: "+totalItemCount);
Log.d(TAG, "firstVisibleItemPosition: "+firstVisibleItemPosition);
Log.d(TAG, "currentPage: "+currentPage);
Log.d(TAG, "PAGE_SIZE: "+PAGE_SIZE);
if (!isLoading && !isLastPage) {
// if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount && firstVisibleItemPosition >= 0) {
if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount && firstVisibleItemPosition >= 0 && currentPage < (PAGE_SIZE)) {
//&& totalItemCount >= PAGE_SIZE
firstVisibleItemPosition = visibleItemCount;
loadMoreItems1();
}
}
// presenter.setIsLoading(true);
// presenter.setCurrentPage(presenter.getCurrentPage() + 1);
// presenter.loadNextPlaylist();
}
调用它,因为它仍与declare @Columnnew varchar(50)
set @Columnnew ='NewColumn12'
select
处于同一类