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1 Is there any advantage of using map over unordered_map in case of trivial keys?
2010年02月04 - 止在unordered_map上使用简单类型——我查看了接口,没有发现会影响代码的任何显著差异。 Hence the question - is there any real reason to use std::map over unordered map in case of simple types like int
2 std::unordered_map and duplicate keys
2011年11月14 - I'm using an stl unordered_map, and I can't seem to get the count method to work. This is my program: 我使用的是stl unordered_map,我似乎无法让count方法工作。这是我的计划
3 case insensitive unordered_map
2013年08月04 - How can I create a case-insensitive unordered_map<string, int>? Does overriding key_equal is sufficient or I also need to update hasher? 如何创建
4 What's the advantage of multimap over map of vectors?
2010年12月14 - ,唯一的区别是: using equal_range in multimap for getting elements of a key and in map of vectors we simply use [] operator and have vector of elements.
5 C++ Is there a way to initialize unordered_map using contents of vector as keys and custom values?
2015年10月25 - 2 and 3 as keys and 0 as default values for all those keys. 现在我想要一个unordered_map,其中2和3为键,0为所有这些键的默认值。 Is there a way to do it? 有办法吗? I tried doing 我试过
6 关于unordered_mapmap
2018年03月26 - unordered_map是基于哈希表实现的,而map基于红黑树实现 unordered_map在大量数据之下用时常常是比map更少的。 但当我们需要一个有序的关联容器的时候,我们必须选择map
7 Obtaining list of keys and values from unordered_map
2011年12月13 - What is the most efficient way of obtaining lists (as a vector) of the keys and values from an unordered_map? 从unordered_map获取键和值的列表(作为向量)最有效的方法是什么
8 Using The [] Operator Efficiently With C++ unordered_map
2011年08月01 - () method, or is using the [] operator quicker than find()? 首先,有人能澄清,在c++中,[]操作符的使用与unordered_map联合进行查找,是封装了对find()方法的调用,还是使用[]操作符比find()更快? Secondly
9 How to choose between map and unordered_map?
2012年12月10 - ,问题是速度。 unordered_map should generally give average complexity of O(1) with the worst case of O(n). In what cases would it get to O(n)? When does a map
10 Choosing between std::map and std::unordered_map
2010年10月10 - Now that std has a real hash map in unordered_map, why (or when) would I still want to use the good old map over unordered_map on systems where

 
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