C++ STL 集合和 C# 集合的比较? [英] Comparison of C++ STL collections and C# collections?

问题描述

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 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

解决方案

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 a std::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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