We have contains, containsAll and containsAllIterable today on RichIterable. The methods containsAny(Collection), containsNone(Collection), containsAnyIterable, and containsNoneIterable can be implemented as default methods by fusing anySatisfy and nonSatisfy with contains.

I am modifying the modifier passed into a before.update hook and noticed that these changes are being passed to the update hook on the server. So the client and the server aren't processing the same modifier; the server only has the modifier outputted by the client side hook. This is related to the discussions here https://forums.meteor.com/t/meteor-collection-hooks-confused/748/7.

The solution