diff --git a/etk/stdTools.cpp b/etk/stdTools.cpp
index 19be112..bd6a24c 100644
--- a/etk/stdTools.cpp
+++ b/etk/stdTools.cpp
@@ -173,7 +173,7 @@ static uint8_t sizeElement(const char* _data, int32_t _lenMax) {
 
 char32_t utf8::convertChar32(const char* _input) {
 	char32_t value = 0;
-	if (NULL == _input) {
+	if (nullptr == _input) {
 		return value;
 	}
 	int32_t len = strlen(_input);
@@ -1121,6 +1121,125 @@ std::ostream& std::operator <<(std::ostream& _os, const std::vector<std::u32stri
 	return _os;
 }
 
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<float>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<double>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<int64_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<uint64_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<int32_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<uint32_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<int16_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<uint16_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<int8_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
+
+std::ostream& std::operator <<(std::ostream& _os, const std::vector<uint8_t>& _obj) {
+	_os << "{";
+	for (size_t iii=0; iii< _obj.size(); iii++) {
+		if (iii>0) {
+			_os << ";";
+		}
+		_os << _obj[iii];
+	}
+	_os << "}";
+	return _os;
+}
 
 #if (defined(__TARGET_OS__Android))
 	std::string std::to_string(int _val) {
diff --git a/etk/stdTools.h b/etk/stdTools.h
index a44d54b..0535f5d 100644
--- a/etk/stdTools.h
+++ b/etk/stdTools.h
@@ -460,6 +460,15 @@ namespace etk {
 	void sort(std::vector<std::u32string *>& _list);
 	//! @previous
 	void sort(std::vector<std::string *>& _list);
+	
+	template<typename T, typename T2> bool isIn(const T& _val, const std::vector<T2>& _list) {
+		for (auto &it : _list) {
+			if (it == _val) {
+				return true;
+			}
+		}
+		return false;
+	}
 };
 
 namespace std {
@@ -473,6 +482,16 @@ namespace std {
 	std::ostream& operator <<(std::ostream& _os, const std::vector<std::string>& _obj);
 	std::ostream& operator <<(std::ostream& _os, const std::u32string& _obj);
 	std::ostream& operator <<(std::ostream& _os, const std::vector<std::u32string>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<float>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<double>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<int64_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<uint64_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<int32_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<uint32_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<int16_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<uint16_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<int8_t>& _obj);
+	std::ostream& operator <<(std::ostream& _os, const std::vector<uint8_t>& _obj);
 };
 
 int32_t strlen(const char32_t * _data);