From da7742b2188d694446ffedc1835b778fb71849b7 Mon Sep 17 00:00:00 2001
From: David Sarrut <david.sarrut@gmail.com>
Date: Thu, 27 Oct 2011 15:49:01 +0200
Subject: [PATCH] Add MapToVec (first/second) functions.

---
 common/clitkCommon.h   |  7 +++++++
 common/clitkCommon.txx | 18 ++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/common/clitkCommon.h b/common/clitkCommon.h
index 31f28dc..97808d8 100644
--- a/common/clitkCommon.h
+++ b/common/clitkCommon.h
@@ -209,6 +209,13 @@ namespace clitk {
   //--------------------------------------------------------------------
   void PrintMemoryUsed();
 
+  //--------------------------------------------------------------------
+  // Convert a map to a vector
+  template <typename M, typename V> 
+  void MapToVecFirst(const M & m, V & v);
+  template <typename M, typename V> 
+  void MapToVecSecond(const M & m, V & v);
+
 #include "clitkCommon.txx"
 
 } // end namespace
diff --git a/common/clitkCommon.txx b/common/clitkCommon.txx
index dc7f165..5ee83bd 100644
--- a/common/clitkCommon.txx
+++ b/common/clitkCommon.txx
@@ -195,6 +195,7 @@ std::string GetTypeAsString()
 }
 //--------------------------------------------------------------------
 
+
 //--------------------------------------------------------------------
 template<class ImageType>
 void CloneImage(const typename ImageType::Pointer & input, typename ImageType::Pointer & output)
@@ -217,5 +218,22 @@ void CloneImage(const typename ImageType::Pointer & input, typename ImageType::P
 }
 //--------------------------------------------------------------------
 
+
+//--------------------------------------------------------------------
+// http://stackoverflow.com/questions/771453/copy-map-values-to-vector-in-stl
+template <typename M, typename V> 
+void MapToVecFirst(const  M & m, V & v) {
+  for( typename M::const_iterator it = m.begin(); it != m.end(); ++it ) {
+    v.push_back( it->first );
+  }
+}
+template <typename M, typename V> 
+void MapToVecSecond(const  M & m, V & v) {
+  for( typename M::const_iterator it = m.begin(); it != m.end(); ++it ) {
+    v.push_back( it->second );
+  }
+}
+//--------------------------------------------------------------------
+
 #endif /* end #define CLITKCOMMON_TXX */
 
-- 
2.47.1