Update TODO.md file

Todo.md

@@ -1,19 +1,24 @@
 ## TODO
 
-- Add new data structures: set, hash table, binary search tree, etc
-- Add algorithms: `sort`, `find`, `print`, `iterator`, `unique`, `reverse`, `fill`, `slice`
-- Implement data copy modes: deep copy, simple copy
-- Add thread safety
-- Add static memory allocation support
-- Add `get_esize()` function
-- Add `static_asserts` and `Guards` on structs
-- Check library by Memory Sanitaizer
-- Add support `resize` function with negative argument which will decrease size of vector/ll
-- Add `array` as core container. This container as opposed to `vector` haven\`t possibility to change the size.
-- Add `Deque` (double-ended queue) data structure.
-- Add default named arguments for `sort` and `uc_equal`
-- Add another types of sort: Quick Sort, Insertion Sort, etc
-- ceedling test:pattern[Alg_Transformation*]
-- Add unit tests for containers
-- Add doxygen support
-- Add test cover support
+### Algorithms
+
+- [ ] Add algorithms: `find`, `print`, `iterator`, `unique`, `reverse`, `fill`, `slice`
+- [ ] Add another types of sort: `Quick Sort`, `Insertion Sort`, `MergeSort`, etc
+- [ ] Implement data copy modes: deep copy, simple copy
+- [ ] Add default named arguments for all algorithms for unify.
+
+### Containers
+
+- [ ] Add `array` as core container. This container as opposed to `vector` haven\`t possibility to change the size.
+- [ ] Add support `resize` function with negative argument which will decrease size of vector/ll
+- [ ] Add **unit tests** for containers: linked list, vector
+
+### Common
+
+- [ ] Add thread safety
+- [ ] Add static memory allocation support
+- [ ] Add `static_asserts` and `Guards` on structs
+- [ ] Check library by [Valgrind](https://valgrind.org/)
+- [ ] Add doxygen support
+- [ ] Add test cover support
+- [ ] ceedling test:pattern[Alg_Transformation*]