From 5b15b11261ce81eae6d3dc6cfd7f2de250fc1006 Mon Sep 17 00:00:00 2001
From: Richard Roberts <richard.jw.roberts@gmail.com>
Date: Thu, 8 Aug 2013 21:41:23 +0000
Subject: [PATCH] Added FastSet/Map exists function

---
 gtsam/base/FastMap.h | 3 +++
 gtsam/base/FastSet.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/gtsam/base/FastMap.h b/gtsam/base/FastMap.h
index 7cea45e88..656eb74fd 100644
--- a/gtsam/base/FastMap.h
+++ b/gtsam/base/FastMap.h
@@ -58,6 +58,9 @@ public:
     return std::map<KEY,VALUE>(this->begin(), this->end());
   }
 
+  /** Handy 'exists' function */
+  bool exists(const KEY& e) const { return find(e) != end(); }
+
 private:
   /** Serialization function */
   friend class boost::serialization::access;
diff --git a/gtsam/base/FastSet.h b/gtsam/base/FastSet.h
index be2864f8f..fe4cc2c80 100644
--- a/gtsam/base/FastSet.h
+++ b/gtsam/base/FastSet.h
@@ -91,6 +91,9 @@ public:
     return std::set<VALUE>(this->begin(), this->end());
   }
 
+  /** Handy 'exists' function */
+  bool exists(const VALUE& e) const { return find(e) != end(); }
+
   /** Print to implement Testable */
   void print(const std::string& str = "") const { FastSetTestableHelper<VALUE>::print(*this, str); }