Imported Ord method, and added a simple test

Src/GeneralUtility.h

@@ -1,12 +1,30 @@
 #ifndef GENERALUTILITY_GENERALUTILITY_H
 #define GENERALUTILITY_GENERALUTILITY_H
 
+#include <algorithm>
+#include <utility>
+
 class GeneralUtility {
 public:
-
+    template <typename T_Type, class T_Container>
+    static int Ord(const T_Type& item, const T_Container& set);
 private:
     // No instanciation! >:(
     GeneralUtility();
 };
 
+template<typename T_Type, class T_Container>
+int GeneralUtility::Ord(const T_Type &item, const T_Container& set) {
+    const auto result =
+            std::find_if(set.begin(), set.end(), [item](const char c) -> bool {
+                return c == item;
+            });
+
+    // No item found
+    if (result == set.end())
+        return -1;
+    else
+        return result - set.begin();
+}
+
 #endif //GENERALUTILITY_GENERALUTILITY_H

Test/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.16)
+project(Test)
+
+set(CMAKE_CXX_STANDARD 17)
+
+include_directories(../Src)
+link_directories(../Src/cmake-build-debug)
+
+add_executable(Test
+        Catch2.h
+        main.cpp
+
+        Ord.cpp
+)
+
+target_link_libraries(Test GeneralUtility)
+

Test/Ord.cpp

@@ -0,0 +1,26 @@
+#include <GeneralUtility.h>
+#include "Catch2.h"
+#include <string>
+
+// Tests that the Ord method works with characters in a string
+TEST_CASE(__FILE__"/WorksWithCharsInString", "[Ord]")
+{
+    const std::string set = "0123456789abcdef";
+
+    REQUIRE(GeneralUtility::Ord('0', set) == 0);
+    REQUIRE(GeneralUtility::Ord('1', set) == 1);
+    REQUIRE(GeneralUtility::Ord('2', set) == 2);
+    REQUIRE(GeneralUtility::Ord('3', set) == 3);
+    REQUIRE(GeneralUtility::Ord('4', set) == 4);
+    REQUIRE(GeneralUtility::Ord('5', set) == 5);
+    REQUIRE(GeneralUtility::Ord('6', set) == 6);
+    REQUIRE(GeneralUtility::Ord('7', set) == 7);
+    REQUIRE(GeneralUtility::Ord('8', set) == 8);
+    REQUIRE(GeneralUtility::Ord('9', set) == 9);
+    REQUIRE(GeneralUtility::Ord('a', set) == 10);
+    REQUIRE(GeneralUtility::Ord('b', set) == 11);
+    REQUIRE(GeneralUtility::Ord('c', set) == 12);
+    REQUIRE(GeneralUtility::Ord('d', set) == 13);
+    REQUIRE(GeneralUtility::Ord('e', set) == 14);
+    REQUIRE(GeneralUtility::Ord('f', set) == 15);
+}

Test/main.cpp

@@ -0,0 +1,2 @@
+#define CATCH_CONFIG_MAIN
+#include "Catch2.h"