如何从具有特定值的 stl 向量中删除项目? [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 vector 的 API 文档，并注意到 vector 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，而且没有内置的方法来执行此操作似乎很奇怪.

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 实际上并没有从容器中删除元素，但它确实返回了可以传递的新的结束迭代器到 container_type::erase 以真正删除现在位于容器末尾的额外元素:

std::remove does not 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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