sequence.sum([field | function]) → number r.sum(sequence, [field | function]) → number
Sums all the elements of a sequence. If called with a field name, sums all the values of that field in the sequence, skipping elements of the sequence that lack that field. If called with a function, calls that function on every element of the sequence and sums the results, skipping elements of the sequence where that function returns nil
or a non-existence error.
Returns 0
when called on an empty sequence.
Example: What’s 3 + 5 + 7?
r([3, 5, 7]).sum().run(conn)
Example: How many points have been scored across all games?
r.table('games').sum('points').run(conn)
Example: How many points have been scored across all games, counting bonus points?
r.table('games').sum{|game| game['points'] + game['bonus_points']}.run(conn)
Couldn't find what you were looking for?
© RethinkDB contributors
Licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
https://rethinkdb.com/api/ruby/sum/