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+#+title: C++ Containers
+
+* Container Concept: Common Interface :containers:concept:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504002
+:END:
+** Front
+What interface is shared by all C++ standard containers?
+** Back
+- *Element access*: ~at~, ~operator[]~, ~front~, ~back~, ~data~
+- *Iterators*: ~begin~, ~end~, ~cbegin~, ~cend~, ~rbegin~, ~rend~
+- *Capacity*: ~empty~, ~size~, ~max_size~
+- *Modifiers*: ~clear~, ~insert~, ~erase~, ~push_back~, ~pop_back~, ~resize~, ~swap~
+
+* Do C++ containers inherit from a common base? :containers:concept:inheritance:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504003
+:END:
+** Front
+Do C++ containers (vector, list, map, etc.) inherit from a common base class?
+** Back
+No. Standard containers are standalone classes. Shared interfaces come from conventions and C++20 concepts (~Container~, ~SequenceContainer~), not inheritance.
+
+* Sequence Containers :containers:sequence:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504004
+:END:
+** Front
+What are the C++ sequence containers?
+** Back
+~vector~, ~deque~, ~list~, ~forward_list~, ~array~
+
+Sequence containers maintain insertion order.
+
+* Associative Containers :containers:associative:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504005
+:END:
+** Front
+What are the C++ associative containers?
+** Back
+- *Ordered*: ~set~, ~multiset~, ~map~, ~multimap~
+- *Unordered*: ~unordered_set~, ~unordered_multiset~, ~unordered_map~, ~unordered_multimap~
+
+* Container Adapters :containers:adapter:
+:PROPERTIES:
+:ANKI_NOTE_ID: 1777826871054
+:END:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504006
+** Front
+What are the C++ container adapters?
+** Back
+~stack~, ~queue~, ~priority_queue~
+
+Adapters provide a restricted interface (e.g., LIFO for stack, FIFO for queue).
+
+* What does vector have that other containers don't? :containers:vector:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504007
+:END:
+** Front
+Which methods does ~vector~ have that other containers typically don't?
+** Back
+~reserve~, ~capacity~, ~shrink_to_fit~
+
+These manage the internal memory buffer.
+
+* Unique methods on sequence containers (list, deque) :containers:sequence:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504008
+:END:
+** Front
+Which sequence containers support ~push_front~ and ~pop_front~?
+** Back
+~deque~ and ~list~ (not ~vector~)
+
+These containers support insertion/removal at both ends.
+
+* Unique methods on associative containers :containers:associative:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504009
+:END:
+** Front
+What tree-based methods do ordered associative containers have?
+** Back
+~find~, ~count~, ~lower_bound~, ~upper_bound~, ~equal_range~
+
+These use tree traversal (BST behind the scenes).
+
+* Unique methods on unordered containers :containers:unordered:
+:PROPERTIES:
+:ANKI_NOTE_TYPE: Basic
+:ANKI_NOTE_ID: 20260504010
+:END:
+** Front
+What hash-specific methods do unordered containers have?
+** Back
+~bucket_count~, ~load_factor~, ~max_load_factor~, ~rehash~, ~reserve~
+
+These manage hash table internals.