monocarp and set the
数据类型-Sorted Set(待补充)
Redis为什么使用skiplist而不是平衡树 Redis中的skiplist主要是为了实现sorted set相关的功能,红黑树当然也能实现其功能,为什么redis作者当初在实现的时候用了skiplist而不是红黑树、b树之类的平衡树? 而且显然红黑树比skiplist更节省内存啊! Redis ......
Appropriation and Appreciation------learning journals 4
There are many cultures in this world, but some cultures are rarely known, even if they are known to a certain extent, leading to the existence of ste ......
A Survey of Diversification Techniques in Search and Recommendation
Wu H., Zhang Y., Ma C., Lyu F., Diaz F. and Liu X. A survey of diversification techniques in search and recommendation. arXiv preprint arXiv:2212.1446 ......
虚拟机报错:AVD xxx is already running.If that is not the case, delete the files
试过很多方法,文件删除后,加载仍然出这个错误。 我之后又想想,再添加一个虚拟机怎样,添加后运行便可以了。 ......
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 ......
docker启动出现Job for docker.service failed because the control process exited error code问题
只需要修改docker.server文件即可: 执行以下命令: vim vim /lib/systemd/system/docker.service 然后将ExecStart=/usr/bin/dockerd -H fd:// 改成ExecStart=/usr/bin/dockerd -H fd:/ ......
What is static and dynamic libraries
What is static and dynamic libraries 他们有什么相同点吗? 都是库文件。对于调用库文件的使用者来说,不管是静态库还是动态库,调用的方式都是一样的,没什么区别。 Differences between static and dynamic libraries 动态库 ......
Measuring the diversity of recommendations: a preference-aware approach for evaluating and adjusting diversity
Meymandpour R. and Davis J. G. Measuring the diversity of recommendations: a preference-aware approach for evaluating and adjusting diversity. Knowled ......
how to set static ip using command line for kali linux
How to configure Kali Linux to use a static IP address https://miloserdov.org/?p=542 sudo vim /etc/network/interfaces auto eth0 iface eth0 inet static ......
vs code 的 settings.json配置
{ " workbench.colorTheme": "Monokai", "editor.matchBrackets": "never", "workbench.iconTheme": "vscode-icons", "diffEditor.ignoreTrimWhitespace": false ......
Python - difference between '../../' and '/../../' when they are concatenated to a path
scnzzh: ~/aaa >cat zzh1.py import os.path print(os.path.dirname(__file__)) abs_file_dir = os.path.abspath(os.path.dirname(__file__)) print(abs_file_di ......
D. Keep the Average High
https://codeforces.com/problemset/problem/1616/D great question! 题解:首先我们令a[i]-=x,这样条件变成了区间和>=0.由裴蜀定理,n可以分解为2x+3y。 我们提出以下命题:对于a中任意子串之和>=0等价于任意长度为2或3的子串 ......
PHP输出视频流 本地and在线视频
废话不多说 直接上代码 这个是支持在线读取远程视频文件的,分段读取 已测试支持ios 及ios uc浏览器,代码中的算法还可以优化,需要的朋友 请自行修改,视频地址可能会失效,到时候换成你需要的就行了。 该带码经过测试,在2h2g 的服务器上支持多人在线观看,同时不消化内存(具体多少人自行测试吧。免 ......
java.lang.UnsupportedClassVersionError: (class file version 61.0), this version of the Java Runtime only recognizes 52
问题背景,新建5个springboot modules。使用相同的依赖 pom.xml 文件。其中 4 个工程正常启动。有一个如图:GulimallWareApplication 跑不起来。报错版本不对。 本人机器上只配置了 1.8 的jdk。所以很纳闷。原以为是不是新版本 idea 自带(刚刚下载 ......
Linux shell set command All In One
Linux shell set command All In One https://FreeBSD.org erros ❌ unbound-variable # $1: unbound variable if (($1)) then echo $1 # arg=$1 # tsGenerator $ ......
GROUP BY clause and contains nonaggregated 报错处理
1055 - Expression #16 of SELECT list is not in GROUP BY clause and contains nonaggregated column 报错处理 源码想移植到新的机器,MySQL 使用PHPStudy 安装 升级到5.7.26 。一切准备就绪 ......
and or 混用
and or 混用 and 优先级 > or 1,SELECT * from managers WHERE `name` = 'admin' OR 1=1 and `password`='admin1111' 相当于 SELECT * from managers WHERE `name` = 'ad ......
JavaScript ES modules import and export with trailing commas All In One
JavaScript ES modules import and export with trailing commas All In One
JavaScript 最佳实践
export + trailing commas
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javascript 高级编程系列 - Set集合与Map集合
ES6中新增的Set集合类型是一种有序列表,其中含有一些相互独立的非重复值,通过Set集合可以快速访问其中 的数据,更有效地追踪各种离散值。 1. 创建Set集合并添加元素 调用new Set()创建Set集合,调用add()方法向集合中添加元素,访问集合的size属性可以获取集合中目前的 元素数量 ......
03.Forecasting the realized volatility of stock price index A hybrid model integrating CEEMDAN and LSTM
Forecasting the realized volatility of stock price index A hybrid model integrating CEEMDAN and LSTM 预测股票价格指数的实际波动率 CEEMDAN 和 LSTM 的混合模型 波动率:波动率是金融资产价 ......
MongoDB ObjectId() function not work and fix solution All In One
MongoDB ObjectId() function not work and fix solution All In One
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使用ansible-playbook自动化安装mongodb replica set
【使用自动化安装mongodb的replica set架构】 说明:使用ansible-playbook 自动化安装replica set架构 【剧本说明】 以下文件在roles目录下 tree mongo_clustermongo_cluster├── handlers│ └── main.yml ......
CF1168C And Reachability 题解 线性dp
题目链接 https://codeforces.com/problemset/problem/1168/C 题目大意 给定一个数组 $a$,从下标 $x$ 能够转移到下标 $y$ 要满足 $x \lt y$ 且 $a_{p_i}, &, a_{p_{i+1}} > 0$,其中 $&$ 表示逻辑与。多 ......
create PO and Post
static void CreatePO(Args _args) { NumberSeq numberSeq; Purchtable Purchtable; PurchLine PurchLine; PurchParmTable purchParmTable; PurchFormLetter pur ......
ignore the hidden files in python
import os root = "/Users/Siddhartha/Desktop/py scripts" for item in os.listdir(root): if not item.startswith('.') and os.path.isfile(os.path.join(root ......
what's the difference between const and constexpr in C++?
Both const and constexpr are used to define constants in C++, but they have different meanings and use cases. const is used to declare a variable as c ......
what are the primitive types of C++?
In C++, there are several primitive data types, which are also known as fundamental or built-in data types. These include: Integer types: Used to repr ......
The Witness Set
$\text{Special For The Witness}$ 简介 说实话这个版块是对于$\text{The Witness}$这一游戏的致敬, 只为它给我带来的强烈的思维和视觉的双重冲击,让我体验到什么才真正可以被称作“第九艺术”。 不论是整个游戏的画质还是其中谜题的质感都让我回味无穷, 特别 ......
【CF1515E Phoenix and Computers】(插入法dp)
原题链接 题意 给定 $n$,$M$。你有 $n$ 台电脑排成一排,你需要依次开启所有电脑。 你可以手动开启一台电脑。在任意时刻,若电脑 $i-1$ 与电脑 $i+1$ 都已经开启 $(1<i<n)$,电脑 $i$ 将立刻被自动开启。你不能再开启已经开启的电脑。 求你有多少种开启电脑的方案。两个方案 ......
Codeforces Round 760 (Div. 3) D. Array and Operations(贪心)
https://codeforces.com/contest/1618/problem/D 题目大意: 给定一个长度为n的数组a,我们可以进行m次操作: 每次操作可以任意选择两个不同的下标的数字x和y,并把它两删除,替换成x/y(但是x/y不可以再被选择进行除数运算了)。 问我们这样剩下来的数列的最 ......