lib/lightgbm.rb in lightgbm-0.3.3 vs lib/lightgbm.rb in lightgbm-0.3.4

@@ -143,10 +143,10 @@
 
       num_boost_round.times do |iteration|
         boosters.each(&:update)
 
         scores = {}
-        boosters.map(&:eval_valid).map(&:reverse).flatten(1).each do |r|
+        boosters.map(&:eval_valid).flat_map(&:reverse).each do |r|
           (scores[r[1]] ||= []) << r[2]
         end
 
         message_parts = ["[#{iteration + 1}]"]