1 files changed, 36 insertions, 0 deletions
diff --git a/lib/nlp_ruby/PriorityQueue.rb b/lib/nlp_ruby/PriorityQueue.rb
new file mode 100644
index 0000000..22662b3
--- /dev/null
+++ b/lib/nlp_ruby/PriorityQueue.rb
@@ -0,0 +1,36 @@
+# FIXME dags
+# this assumes that elements in the queue
+# have a numerical member named 'score'
+class PriorityQueue
+
+  def initialize a=Array.new
+    @queue = Array.new a
+  end
+
+  def sort!
+    @queue.sort_by! { |i| -i.score }
+  end
+
+  def pop
+    sort!
+    @queue.pop
+  end
+
+  def push i
+    @queue << i
+  end
+
+  def empty?
+    @queue.empty?
+  end
+
+  # FIXME
+  def to_s
+    a = []
+    @queue.each { |i|
+      a << "#{i.to_s}[#{i.score}]"
+    }
+    "[#{a.join ', '}]"
+  end
+end
+