From ef37a748ff59400bc5accd5d32adad7b2fd62893 Mon Sep 17 00:00:00 2001
From: Joseph Lenox <lenox.joseph@gmail.com>
Date: Sat, 17 Nov 2018 20:55:17 -0600
Subject: [PATCH] Added grep method for containers (returns a new copy of the
 container that returns true for the lambda function).

---
 src/GUI/misc_ui.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/GUI/misc_ui.hpp b/src/GUI/misc_ui.hpp
index ec24a57d1..251ca84a0 100644
--- a/src/GUI/misc_ui.hpp
+++ b/src/GUI/misc_ui.hpp
@@ -177,6 +177,14 @@ public:
     }
 };
 
+/// Quick implementation of grep to filter containers based on some lambda function.
+template<class T, class G>
+T grep(const T& container, G lambda_func) {
+    T result;
+    std::copy_if(container.cbegin(), container.cend(),  std::back_inserter(result), lambda_func);
+    return result;
+}
+
 }} // namespace Slic3r::GUI
 
 #endif // MISC_UI_HPP