Add is_numeric Method

Utilities/StringAlgorithm.cpp

@@ -118,4 +118,15 @@ std::string::const_iterator find_nth(const std::string& haystack, const std::str
 	return iterator;
 }
 
+bool is_numeric(const std::string& string)
+{
+	auto result = double();
+	std::stringstream i;
+
+	i << string;
+	i >> result;
+
+	return !i.fail() && i.eof();
+}
+
 } // namespace StringAlgorithm

include/StringAlgorithm.h

@@ -31,6 +31,8 @@ bool icontains(const std::string& subject, const std::string& find);
 
 std::string::const_iterator find_nth(const std::string& haystack, const std::string& needle, size_t nth);
 
+bool is_numeric(const std::string& str);
+
 } // namespace StringAlgorithm
 
 #endif // STRINGALGORITHM_H