Replace map.flatten with flat_map in actionpack

3 files changed, 8 insertions, 8 deletions

diff --git a/actionpack/lib/action_dispatch/journey/nfa/dot.rb b/actionpack/lib/action_dispatch/journey/nfa/dot.rb
index 5c33a872e5..47bf76bdbf 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/dot.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/dot.rb
@@ -16,9 +16,9 @@ module ActionDispatch
           #  end
           #  "  #{n.object_id} [label=\"#{label}\", shape=box];"
           #}
-          #memo_edges = memos.map { |k, memos|
+          #memo_edges = memos.flat_map { |k, memos|
           #  (memos || []).map { |v| "  #{k} -> #{v.object_id};" }
-          #}.flatten.uniq
+          #}.uniq
 
         <<-eodot
 digraph nfa {
diff --git a/actionpack/lib/action_dispatch/journey/nfa/simulator.rb b/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
index 5b40da6569..b23270db3c 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
@@ -34,7 +34,7 @@ module ActionDispatch
 
           return if acceptance_states.empty?
 
-          memos = acceptance_states.map { |x| tt.memo(x) }.flatten.compact
+          memos = acceptance_states.flat_map { |x| tt.memo(x) }.compact
 
           MatchData.new(memos)
         end
diff --git a/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb b/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
index a3017aeea1..66e414213a 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
@@ -42,7 +42,7 @@ module ActionDispatch
         end
 
         def states
-          (@table.keys + @table.values.map(&:keys).flatten).uniq
+          (@table.keys + @table.values.flat_map(&:keys)).uniq
         end
 
         # Returns a generalized transition graph with reduced states. The states
@@ -93,7 +93,7 @@ module ActionDispatch
         # Returns set of NFA states to which there is a transition on ast symbol
         # +a+ from some state +s+ in +t+.
         def following_states(t, a)
-          Array(t).map { |s| inverted[s][a] }.flatten.uniq
+          Array(t).flat_map { |s| inverted[s][a] }.uniq
         end
 
         # Returns set of NFA states to which there is a transition on ast symbol
@@ -107,7 +107,7 @@ module ActionDispatch
         end
 
         def alphabet
-          inverted.values.map(&:keys).flatten.compact.uniq.sort_by { |x| x.to_s }
+          inverted.values.flat_map(&:keys).compact.uniq.sort_by { |x| x.to_s }
         end
 
         # Returns a set of NFA states reachable from some NFA state +s+ in set
@@ -131,9 +131,9 @@ module ActionDispatch
         end
 
         def transitions
-          @table.map { |to, hash|
+          @table.flat_map { |to, hash|
             hash.map { |from, sym| [from, sym, to] }
-          }.flatten(1)
+          }
         end
 
         private