Update README.md

README.md

@@ -17,3 +17,16 @@ DB.set('key', 'value')
 - `has(key)` - Is there a key in the db
 - `remove(key)` - Removes a key from the db
 - `all()` - Gets the whole databse as object
+
+### Number values
+Functions for values that are of type number (Values will be converted)
+- `add(key, number)` - Adds the number to the current
+- `sub(key, number)` - Subtracts the number to the current
+
+### List values
+Functions for values that are of type array
+- `push(key, value)` - Pushes value into the list element
+- `pull(key, index)` - Removes element at index
+- `pop(key)` - Removes last element (return removed value)
+- `flat(key)` - Flattens array at key
+- `concat(key, value)` - Concats a array to the current one