public IEnumerable <TRes> Join <TRVec, TR, TRes>(VectorBase <TRVec, TR> rightVec, Func <string, T, TR, TRes> resultSelector)
where TRVec : VectorBase <TRVec, TR>, new()
{
var rightEnum = rightVec?.Items ?? Enumerable.Empty <VectorItem <TR> >();
foreach (var grp in this.Select(i => (left: true, server: i.ServerId, leftval: i.Value, rightval: default(TR)))
.Concat(rightEnum.Select(i => (left: false, server: i.ServerId, leftval: default(T), rightval: i.Value)))
.GroupBy(t => t.server, StringComparer.InvariantCultureIgnoreCase))
{
// note that this validates that the same server ID is not present multiple times in either.
var leftval = grp.SingleOrDefault(t => t.left).leftval;
var rightval = grp.SingleOrDefault(t => !t.left).rightval;
var serverId = grp.Key;
if (string.IsNullOrWhiteSpace(serverId))
{
throw new InvalidOperationException("Vector server IDs may not be empty.");
}
yield return(resultSelector(serverId, leftval, rightval));
}
}
public IEnumerable <TRes> Join <TRVec, TR, TRes>(VectorBase <TRVec, TR> rightVec, Func <T, TR, TRes> resultSelector)
where TRVec : VectorBase <TRVec, TR>, new()
{
return(Join(rightVec, (_, l, r) => resultSelector(l, r)));
}
