initial commit
Where implemented
IGrouping.ToLookup
Where with indexer
Select instead of Where
Intersect + new Concat + minor cleanup
Except
Except simplified
[Pure] attributes added
Join
Zip
Builder made part of library; Lookup impl to be used later
null key support for Lookup Builder, removed unnecessary LookupImpl
test to check that original source reference is not kept by built lookup
support for comparers in builder; two tests failing due to null misbehavior (to investigate)
fixed null handling tests
comparers support in dictionary.ToLookup
subjects for specs for better readability
missing [Pure] attributes added
comparers support in Grouping.ToLookup and Lookup.ToDictionary