use negative index

seanxiesx · Oct 5, 2013 · 1bca741 · 1bca741
1 parent 2e7d222
commit 1bca741
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/redis_rate_limiter.rb b/lib/redis_rate_limiter.rb
@@ -25,7 +25,7 @@ def add subject, time = Time.now.to_i
   def exceeded? subject
     subject = "#{@key}:#{subject}"
     return false if @redis.llen(subject) < @limit
-    last = @redis.lrange(subject, @limit - 1, @limit - 1).last
+    last = @redis.lrange(subject, -1, -1).last
     Time.now.to_i - last.to_i < @interval
   end
 end