如何从stl向量中删除具有某个值的项目？ [英] How do I remove an item from a stl vector with a certain value?

问题描述

我正在查看stl向量的API文档，并注意到在向量类上没有允许删除具有特定值的元素的方法。这似乎是一个常见的操作，看起来很奇怪，没有内置的方法来做到这一点。

I was looking at the API documentation for stl vector, and noticed there was no method on the vector class that allowed the removal of an element with a certain value. This seems like a common operation, and it seems odd that there's no built in way to do this.

推荐答案

std :: remove实际上不会从容器中擦除元素，但它会返回新的结束迭代器，它可以传递给container_type :: erase来删除现在位于容器末尾的额外元素：

std::remove doesn't actually erase the element from the container, but it does return the new end iterator which can be passed to container_type::erase to do the REAL removal of the extra elements that are now at the end of the container:

std::vector<int> vec;
// .. put in some values ..
int int_to_remove = n;
vec.erase(std::remove(vec.begin(), vec.end(), int_to_remove), vec.end());

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