diff --git a/Makefile b/Makefile
index db9cec5..ccb02b8 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ RESET    = "\e[0m"
 
 NAME          = containers
 
-CC            = clang++
+CC            = g++
 EXT           = cpp
 
 CFLAGS        = -Wall -Wextra -Werror $(INCLUDES)
@@ -80,8 +80,8 @@ endif
 all: $(NAME)
 
 stl: CFLAGS += -D STL
-stl: all
-ft: all
+stl: re
+ft: re
 
 $(D_OBJS)/%.o: %.$(EXT) | $(D_OBJS)
 	@echo $(CYAN)"compilation (objects.o) :"$(RESET)
diff --git a/headers/is_integral.hpp b/headers/is_integral.hpp
index e6cb782..8a70806 100644
--- a/headers/is_integral.hpp
+++ b/headers/is_integral.hpp
@@ -3,18 +3,6 @@
 
 namespace ft {
 
-//struct true_type {
-//	typedef bool		value_type;
-//	typedef true_type	type;
-//	static const bool   value = true;
-//};
-//
-//struct false_type {
-//	typedef T			value_type;
-//	typedef false_type	type;
-//	static const bool   value = false;
-//};
-
 template <class T> struct is_integral
 {
 	typedef char yes[1];
@@ -39,51 +27,6 @@ template <class T> struct is_integral
 	static yes& test(unsigned long int);
 	static yes& test(unsigned long long int);
 
-/*
-	static yes& test(const bool);
-	static yes& test(const char);
-	static yes& test(const wchar_t);
-	static yes& test(const signed char);
-	static yes& test(const short int);
-	static yes& test(const int);
-	static yes& test(const long int);
-	static yes& test(const long long int);
-	static yes& test(const unsigned char);
-	static yes& test(const unsigned short int);
-	static yes& test(const unsigned int);
-	static yes& test(const unsigned long int);
-	static yes& test(const unsigned long long int);
-
-	static yes& test(volatile bool);
-	static yes& test(volatile char);
-	static yes& test(volatile wchar_t);
-	static yes& test(volatile signed char);
-	static yes& test(volatile short int);
-	static yes& test(volatile int);
-	static yes& test(volatile long int);
-	static yes& test(volatile long long int);
-	static yes& test(volatile unsigned char);
-	static yes& test(volatile unsigned short int);
-	static yes& test(volatile unsigned int);
-	static yes& test(volatile unsigned long int);
-	static yes& test(volatile unsigned long long int);
-
-	static yes& test(const volatile bool);
-	static yes& test(const volatile char);
-	static yes& test(const volatile wchar_t);
-	static yes& test(const volatile signed char);
-	static yes& test(const volatile short int);
-	static yes& test(const volatile int);
-	static yes& test(const volatile long int);
-	static yes& test(const volatile long long int);
-	static yes& test(const volatile unsigned char);
-	static yes& test(const volatile unsigned short int);
-	static yes& test(const volatile unsigned int);
-	static yes& test(const volatile unsigned long int);
-	static yes& test(const volatile unsigned long long int);
-*/
-
-
 	// non-template function with direct matching are always considered first
 	// then the function template with direct matching are considered
 	// https://stackoverflow.com/questions/12877546/how-do-i-avoid-implicit-conversions-on
@@ -95,19 +38,6 @@ template <class T> struct is_integral
 } // namespace ft
 
 // "template <>" introduce a total specialization of a template :
-//
-//    template <typename T>
-//    class A
-//    {
-//        // body for the general case
-//    };
-//
-//    template <>
-//    class A<bool>
-//    {
-//        // body that only applies for T = bool
-//    };
-//
 // https://stackoverflow.com/questions/6288812/what-is-the-meaning-of-template-with-empty-angle-brackets-in-c
 
 // SFINAE : https://jguegant.github.io/blogs/tech/sfinae-introduction.html
diff --git a/headers/vector.hpp b/headers/vector.hpp
index 53ed939..e4b3540 100644
--- a/headers/vector.hpp
+++ b/headers/vector.hpp
@@ -99,17 +99,11 @@ public:
 	template <class InputIterator>
 		typename enable_if< !is_integral<InputIterator>::value,void >::type
 		assign(InputIterator first, InputIterator last);
-	//	template <class InputIterator>
-	//		void	assign(InputIterator first, InputIterator last
-	//		typename enable_if< !is_integral<InputIterator>::value, bool >::type == true);
-//	template <class InputIterator>
-//		typename enable_if< is_integral<InputIterator>::value,void >::type
-//		assign(size_type n, const value_type& val);
 	void		assign(size_type n, const value_type& val);
 // push_back ---------------------------------
 	void		push_back(const value_type & val);
 // pop_back ----------------------------------
-	//void		pop_back();
+	void		pop_back();
 // insert ------------------------------------
 	//iterator	insert(iterator position, const value_type& val);
 	//void		insert(iterator position, size_type n, const value_type& val);
diff --git a/templates/vector.tpp b/templates/vector.tpp
index fe48257..69c756b 100644
--- a/templates/vector.tpp
+++ b/templates/vector.tpp
@@ -155,7 +155,10 @@ VT_TPL void VT::
 	 ******************/
 // operator[] --------------------------------
 VT_TPL typename VT::reference VT::
-	operator[](size_type n) { return _mem_ptr[n]; }
+	operator[](size_type n)
+{
+	return _mem_ptr[n];
+}
 //const_reference	operator[](size_type n) const;
 // at ----------------------------------------
 //reference		at(size_type n);
@@ -175,35 +178,25 @@ VT_TPL template <class InputIterator>
 typename enable_if< !is_integral<InputIterator>::value,void >::type VT::
 	assign( InputIterator first, InputIterator last)
 {
-// TMP
-std::cout << B_RED "inside assign(first, last) " RESET;
-// TMP END
 	InputIterator	tmp = first;
-	int				range;
+	int				range = 0;
 
 	clear();
 
-	for (range = 1; tmp != last; range++)
-		tmp++;
+	while (tmp++ != last)
+		range++;
 	_size += range;
 	if (_size >= _capacity)
 		reserve(_size);
 	while (first != last)
 	{
-		_allocator.construct(&_mem_ptr[_size], first);
+		_allocator.construct(&_mem_ptr[_size], *first);
 		first++;
 	}
 }
-
-// VT_TPL typename enable_if< isinteger<T>::value,std::string >::type VT::
-//VT_TPL template <class InputIterator>
-//typename enable_if< is_integral<InputIterator>::value,void >::type VT::
 VT_TPL void VT::
 	assign( size_type n, const T & val )
 {
-// TMP
-std::cout << B_RED "inside assign(n, val) " RESET;
-// TMP END
 	if (n > _allocator.max_size())
 		throw std::length_error("assign: n > max_size");
 	
@@ -237,7 +230,12 @@ VT_TPL void VT::
 	_size++;
 }
 // pop_back ----------------------------------
-//void		pop_back();
+VT_TPL void VT::
+	pop_back()
+{
+	_allocator.destroy(end() - 1);
+	_size--;
+}
 // insert ------------------------------------
 //iterator	insert(iterator position, const value_type& val);
 //void		insert(iterator position, size_type n, const value_type& val);
diff --git a/tests/main.cpp b/tests/main.cpp
index 4b5d322..bed6c7a 100644
--- a/tests/main.cpp
+++ b/tests/main.cpp
@@ -298,15 +298,16 @@ int	main() {
 
 	TEST(vector::assign)
 	{
+		// title
 		TITLE(cplusplus.com reference :)
 
-		std::vector<int> first;
-		std::vector<int> second;
-		std::vector<int> third;
+		ft::vector<int> first;
+		ft::vector<int> second;
+		ft::vector<int> third;
 
 		first.assign (7,100);             // 7 ints with a value of 100
 
-		std::vector<int>::iterator it;
+		ft::vector<int>::iterator it;
 		it=first.begin()+1;
 
 		second.assign (it,first.end()-1); // the 5 central values of first
@@ -318,6 +319,8 @@ int	main() {
 		std::cout << "Size of second: " << int (second.size()) << '\n';
 		std::cout << "Size of third: " << int (third.size()) << '\n';
 
+
+		// title
 		TITLE(capacity tests of assignation :)
 
 		ft::vector<int> myvector;
@@ -339,17 +342,50 @@ int	main() {
 			std::cout << "[" << i << "] " << myvector[i] << " - ";
 		std::cout << "\nsize : " << size << " , capacity : "  << myvector.capacity() << "\n";
 
-	//	std::cout << "\nassign 7268\n";
-	//	myvector.assign(7268, 12);
-	//	size = myvector.size();
-	//	for (int i = 0; i < size; i++)
-	//		std::cout << "[" << i << "] " << myvector[i] << " - ";
-	//	std::cout << "\nsize : " << size << " , capacity : "  << myvector.capacity() << "\n";
+		std::cout << "\nassign 7268\n";
+		myvector.assign(7268, 12);
+		size = myvector.size();
+		for (int i = 0; i < size; i++)
+			std::cout << "[" << i << "] " << myvector[i] << " - ";
+		std::cout << "\nsize : " << size << " , capacity : "  << myvector.capacity() << "\n";
+
+
+		// title
+		TITLE(tests of iterators :)
+
+		ft::vector<int> int_vector_1;
+		ft::vector<int> int_vector_2;
+		ft::vector<int> int_vector_3;
+		ft::vector<int> it_vector;
+
+		std::cout << "\nassign 1\n";
+		int_vector_1.assign(1, 12);
+		it_vector.assign(int_vector_1.begin(), int_vector_1.end());
+		size = it_vector.size();
+		for (int i = 0; i < size; i++)
+			std::cout << "[" << i << "] " << it_vector[i] << " - ";
+		std::cout << "\nsize : " << size << " , capacity : "  << it_vector.capacity() << "\n";
+
+		std::cout << "\nassign 1\n";
+		int_vector_2.assign(1, 6);
+		it_vector.assign(int_vector_2.begin(), int_vector_2.end() - 1);
+		size = it_vector.size();
+		for (int i = 0; i < size; i++)
+			std::cout << "[" << i << "] " << it_vector[i] << " - ";
+		std::cout << "\nsize : " << size << " , capacity : "  << it_vector.capacity() << "\n";
+
+		std::cout << "\nassign 1\n";
+		int_vector_3.assign(266, 1);
+		it_vector.assign(int_vector_3.begin() + 13, int_vector_3.end() - 172);
+		size = it_vector.size();
+		for (int i = 0; i < size; i++)
+			std::cout << "[" << i << "] " << it_vector[i] << " - ";
+		std::cout << "\nsize : " << size << " , capacity : "  << it_vector.capacity() << "\n";
+
 	}
 	TESTEND
 
 
-/*
 	TEST(vector::push_back)
 	{
 		ft::vector<int> myvector;
@@ -369,17 +405,15 @@ int	main() {
 		std::cout << "  -> size : " << myvector.size() << " , capacity :"  << myvector.capacity() << "\n";
 
 		// second test
-	//	for (int i = 0; i < 72363; i++)
-	//	{
-	//		myvector.push_back(9);
-	//		std::cout << "[" << i
-	//				  << ":" << myvector.capacity() << "] ";
-	//	}
-	//	std::cout << "  -> size : " << myvector.size() << " , capacity :"  << myvector.capacity() << "\n";
+		for (int i = 0; i < 72363; i++)
+		{
+			myvector.push_back(9);
+			std::cout << "[" << i
+					  << ":" << myvector.capacity() << "] ";
+		}
+		std::cout << "  -> size : " << myvector.size() << " , capacity :"  << myvector.capacity() << "\n";
 	}
 	TESTEND
-*/
-
 
 /*
 	TEST(vector::pop_back)
diff --git a/tests/test.sh b/tests/test.sh
new file mode 100644
index 0000000..f180752
--- /dev/null
+++ b/tests/test.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+# cd $(dirname $0)
+
+make stl > /dev/null
+./containers > tests/output_stl.log
+
+make ft > /dev/null
+./containers > tests/output_ft.log
+
+diff --context=0 --color=always tests/output_stl.log tests/output_ft.log