Comparison of C++ STL collections and C# collections?
I'm still learning C# and was surprised to find out that a List<T>
is much more like a std::vector
than a std::list
. Can someone describe all the C# collections in terms of the STL (or if STL comparisons 开发者_JAVA技巧are difficult, standard conceptual data types with Wikipedia links? I expect the reference would be widely useful.
A minimal list of collections of interest include (feel free to add others):
- Array
- List
- ArrayList
- HashTable
- Dictionary
- ListDictionary
- SortedDictionary
- SortedList
- Queue
- Stack
Edit: I just found this similar question that may be of interest: Mapping between stl C++ and C# containers
Here's what I've found (ignoring the old non-generic collections):
Array
- C array, though the .NET Array can have a non-zero starting index.List<T>
-std::vector<T>
Dictionary<TKey, TValue>
-unordered_map<Key, Data>
HashSet<T>
-unordered_set<Key>
SortedDictionary<TKey, TValue>
-std::map<Key, Data>
SortedList<TKey, TValue>
- equivalent to astd::vector<T>
but keeping it ordered by using binary search + insert when adding elements.SortedSet<T>
-std::set<Key>
Queue<T>
-std::queue<T>
Stack<T>
-std::stack<T>
LinkedList<T>
-std::list<T>
Notably missing from the .NET collections are the "multi-" variants, e.g., multiset
, multimap
, etc. However, they have added a number of very useful threadsafe collections: the "Concurrent-" variants, e.g., ConcurrentDictionary
, ConcurrentQueue
, etc.
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