QMap但没有按键排序 [英] QMap but without sorting by key

问题描述

我需要结构像QMap但没有排序的键，所以如果我插入项目，我首先可以计算，这个项目将在所有其他人之前。并在指定元素之前或之后插入对。 Qt有没有这样的？

解决方案

QMap 这意味着插入订单不重要。您似乎正在寻找队列。但是，如果你需要一个可以在插入顺序中迭代并且通过特定键访问的容器，那么Qt就没有这样的结构。

这些可以帮助您：

• 
  
• 根据插入序列对地图项进行排序

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I need structure like QMap but without sorting on keys, so if I insert item there first I can count that this item will be before all others. And insert pair before or after specified element. Does Qt have such?

解决方案

QMap is implemented as a tree, which means that the insertion order does not matter. It appears that you are looking for a queue. However, if you need a container which can be iterated in both insertion order and at the same time accessed through a specific key, then Qt has no such structure for you.

These could help you:

• A std::map that keep track of the order of insertion?
• Make Map Key Sorted According To Insert Sequence

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