What is the difference between map and unordered_map in C++? When should you use each?

What is the difference between map and unordered_map in C++? When should you use each?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

标签: interviewbit, cpp, topic-specific, c++, systems

参考答案摘要

map is implemented as a balanced binary search tree, typically a red-black tree. It stores keys in sorted order. All operations take O(log n). unordered_map is implemented as a hash table. It provides...

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