public static HashMap <A, HashMap <B, HashMap <C, V> > > MapRemoveT <A, B, C, T, V>(
this HashMap <A, HashMap <B, HashMap <C, T> > > self, Func <HashMap <C, T>, HashMap <C, V> > map)
{
return(self.Map((ka, va) => va.Map((kb, vb) => map(vb))
.Filter((kb, vb) => vb.Count > 0))
.Filter((ka, va) => va.Count > 0));
}
public static HashMap <A, HashMap <B, HashMap <C, HashMap <D, T> > > > FilterT <A, B, C, D, T>(
this HashMap <A, HashMap <B, HashMap <C, HashMap <D, T> > > > self, Func <T, bool> pred)
{
return(self.Map((ka, va) => va.FilterT(pred)));
}
public static HashMap <A, HashMap <B, HashMap <C, HashMap <D, V> > > > MapT <A, B, C, D, T, V>(
this HashMap <A, HashMap <B, HashMap <C, HashMap <D, T> > > > self, Func <T, V> map)
{
return(self.Map((ka, va) => va.MapT(map)));
}
