Added function to convert vector to string

FieldOpt/Utilities/stringhelpers.hpp

@@ -0,0 +1,23 @@
+/// This file contains helper methods for working with time.
+#ifndef STRINGHELPERS_FUNCTIONS_H
+#define STRINGHELPERS_FUNCTIONS_H
+
+#include <string>
+#include <vector>
+
+using namespace std;
+
+template <typename T>
+inline string vec_to_str(vector<T> vec) {
+    string str = "";
+    if (vec.size() == 0) return str;
+    str = to_string(vec[0]);
+    if (vec.size() > 1) {
+        for (int i = 1; i < vec.size(); ++i) {
+            str = str + ", " + to_string(vec[i]);
+        }
+    }
+    return str;
+}
+
+#endif // STRINGHELPERS_FUNCTIONS_H