use Set instead of Array.

The tests are a bit faster, before this change i ran the tests 10 times:
["5.49", "5.56", "5.53", "5.27", "5.26", "5.24", "5.48", "5.19", "5.28"]

After this change i ran them again:
["5.02", "5.25", "4.85", "4.97", "4.9", "4.86", "4.83", "4.87", "4.86"]

1 files changed, 3 insertions, 6 deletions

diff --git a/lib/pry/input_completer.rb b/lib/pry/input_completer.rb
index 743cab8e..859cb667 100644
--- a/lib/pry/input_completer.rb
+++ b/lib/pry/input_completer.rb
@@ -167,21 +167,18 @@ class Pry::InputCompleter
           end
         else
           # func1.func2
-          candidates = []
+          candidates = Set.new
           to_ignore = ignored_modules
           ObjectSpace.each_object(Module){|m|
             next if (to_ignore.include?(m) rescue true)
-
             # jruby doesn't always provide #instance_methods() on each
             # object.
             if m.respond_to?(:instance_methods)
-              candidates.concat m.instance_methods(false).collect(&:to_s)
+              candidates.merge m.instance_methods(false).collect(&:to_s)
             end
           }
-          candidates.uniq!
-          candidates.sort!
         end
-        select_message(path, receiver, message, candidates)
+        select_message(path, receiver, message, candidates.sort)
       when /^\.([^.]*)$/
         # Unknown(maybe String)
         receiver = ""