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STL push_back new出来的空间如何释放
STL中的容器相当“聪明”，它们提供了迭代器，以便进行向后和向前的遍历（通过begin、end、rbegin等）；它们告诉你所包含的元素类型（通过它们的value_type类型定义）；在插入和删除的过程中，它们自己进行必要的内存管理；它们报告自己有多少对象，最多能容纳多少对象（分别通过size和ma ......
编程实现可靠数据传输原理 Go-Back-N
1. 编写接收端代码 接收端模拟网络环境较差时情况，每次生成一个随机数，小于0.8时不丢包，大于0.8时丢包。 接收数据格式：编号+空格+内容 返回数据格式： 丢包：Loss+空格+编号 未丢包：ACK+空格+编号 接收包非累计计数时不做处理。 2. 编写发送端代码 发送端较为复杂，分为两个线程： ......
C++ push_back和emplace_back的区别(含测试代码)
#include<iostream> #include<string> #include<set> #include<time.h> #include<cstring> #include <vector> #define LL long long #define MAXN 100010 using ......
centos登陆报错：System is booting up. Unprivileged users are not permitted to log in yet. Please come back later. For technical details, see pam_nologin(8).
问题：开机后ssh到服务器出现此报错，大概意思是系统正在启动中非授权用户不允许登录， 解决：不需要处理，等会儿系统彻底起来后重新登陆就没有了，对应文件在/run/nologin ......
C++ STL vector 性能之push_back、emplace_back、reserve
#include <iostream> #include <vector> #include <chrono> using namespace std; constexpr int N = 10; void timeMeasure(void(*f)()){ auto begin = std::chr ......
docker启动报错the backing xfs filesystem is formatted without d_type support
WARNING: overlay2: the backing xfs filesystem is formatted without d_type support, which leads to incorrect behavior. Reformat the filesystem with fty ......
[Algorithm] Dynamic programming - 02 - Longest Common Subsequence - Drawing 2d matrix + back tracing
Write a function that takes in two strings and returns their longest common subsequence. A subsequence of a string is a set of characters that aren't ......
Dell H730 write-through和write-back配置
0x00 说明 创建raid时，会要求选择write Policy 和read policy以及Disk cache policy Write Policy 1.write-though 数据在写入存储的同时，要写入缓存，这种方式安全但是会牺牲写性能，因为只有等数据完全落入硬盘后，才算是一次io完成 ......
[Algorithm] Disk height (DP + back tracking)
You're given a non-empty array of arrays where each subarray holds three integers and represents a disk. These integers denote each disk's width, dept ......
How to log in when using gin's non-separated front-end and back-end systems
Person: How to log in when using gin's non-separated front-end and back-end systems? ChatGPT: When using Gin as the back-end system and a non-separate ......