vector and maitrix foreach

libs/main/containers/pivector2d.h

@@ -274,6 +274,20 @@ public:
 		mat.clear();
 	}
 
+	const PIVector2D<T> & forEach(std::function<void(const T &)> f) const {
+		mat.forEach(f);
+		return *this;
+	}
+	PIVector2D<T> copyForEach(std::function<T(const T &)> f) const {
+		PIVector2D<T> ret(*this);
+		ret.mat = mat.copyForEach(f);
+		return ret;
+	}
+	PIVector2D<T> & forEachInplace(std::function<T(const T &)> f) {
+		mat.forEachInplace(f);
+		return *this;
+	}
+
 protected:
 	size_t rows_, cols_;
 	PIVector<T> mat;