Generally prefer data.empty() to data.size() == 0.
Generally prefer data.empty() to data.size() == 0.

nandub/ldid,songchenwen/ldid,tpoechtrager/ldid,nandub/ldid,tpoechtrager/ldid,tpoechtrager/ldid,songchenwen/ldid,songchenwen/ldid,nandub/ldid