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Pretty State Machine Patterns in Rust

Photo - Samuel Zeller Photo Pretty State Machine Patterns in Rust Ana, Hoverbear 🐻 Articles A computer scientist working in open source towards a mor ......
Patterns Machine Pretty State Rust

c#ref out in

ref、out、in的共同点是: 需要在方法定义与方法调用处显示的使用关键字。参数按引用传递,而非值传递。ref、out、in的不同点是: ref:参数变量需要初始化,参数在方法中可以修改或不修改。out:参数变量无需初始化,参数在方法中必须进行赋值。in:参数变量需要初始化,参数在方法中不能进行修 ......
ref out in

TOP 18 BEST DIAGNOSTIC TOOLS FOR TRUCKS IN 2023

Why Heavy Duty Scan Tool Is Necessary?Heavy-duty scan tools are essential for commercial truck fleet operators and maintenance technicians because the ......
DIAGNOSTIC TRUCKS TOOLS BEST 2023

28.循环语句for in

循环语句-for-in Python并没有提供类似C语言中那种传统意义上的for循环,而是提供了一种专门处理字符串,元组,列表,字典等可迭代的序列类型数据的增强型for循环。 遍历可迭代对象 使用for-in循环处理可迭代对象,可以使操作过程变的极其简单。 遍历字符串 s = "Hello Hogw ......
语句 for 28 in

【论文阅读笔记】【OCR-文本识别】 CLIPTER: Looking at the Bigger Picture in Scene Text Recognition

CLIPTER ICCV 2023 读论文思考的问题 论文试图解决什么问题? 现有的文本识别方法只关注于局部截取的文本区域,识别模型并没有利用全图的上下文信息,导致其可能对有挑战性的文本的识别效果较差 能否以某种方式使识别器利用上global feature的信息? 文章提出了什么样的解决方法? 提 ......
Recognition 文本 CLIPTER Looking Picture

A measure to solve water issues in China

Introduction of the Water Conservation Project II The Water Conservation Project II supported by the World Bank tackled these water scarcity issues he ......
measure issues China solve water

Performance Improvements in .NET 8 -- Native AOT & VM & GC & Mono

原生 AOT 原生 AOT 在 .NET 7 中发布。它使 .NET 程序在构建时被编译成一个完全由原生代码组成的自包含可执行文件或库:在执行时不需要 JIT 来编译任何东西,实际上,编译的程序中没有包含 JIT。结果是一个可以有非常小的磁盘占用,小的内存占用,和非常快的启动时间的应用程序。在 .N ......
amp Improvements Performance Native Mono

continue语句只能用在while语句、do/while语句、for语句、或者for/in语句的循环体内,在其它地方使用都会引起错误!是停止当前语句,并从头执行该语句

分析下面代码块,输出( )行########。 var i = 0; while( i < 40 ){ if( i < 30 ) continue; Document.write(‘########’); i++; } A 40 B 30 C 39 D 无数行 E 一行也没有 正确答案:E ①中文引 ......
语句 循环体 while 从头 for

TLOP is Implemented Effectively in China

The National Five-Year Water Ecological Function Plan (NFWEFP) that covers all of China, has been iterated six times since its implementation in 1995. ......
Implemented Effectively China TLOP is

Maven打包项目时异常:Cannot access nexus-aliyun (http://maven.aliyun.com/nexus/content/groups/public) in offline mode and

package是报错 Cannot access nexus-aliyun (http://maven.aliyun.com/nexus/content/groups/public) in offline mode and the artifact org.apache.maven.surefire ......
aliyun nexus nexus-aliyun content offline

go.mod file not found in current directory or any parent directory; see 'go help modules' (exit status 1)

go.mod file not found in current directory or any parent directory; see 'go help modules' (exit status 1) 原因: 目录少缺少 go.mod 文件。 解决方法: 在终端中输入: go mod in ......
directory current modules parent status

vue/eslint_vue/no-side-effects-in-computed-properties报错

出现这个错误的缘由是因为我在vue3中的computed中, 把computed的回调函数当做数据监听器处理程序, 在里面修改了ref定义的变量数据的值. const curArticle = computed(() => { if (curArticleList.value.length 0) { ......

for…in 遍历对象会把原型遍历出来不被推荐

for ... in 的特点: 1.按照从小到大,优先迭代数字属性; 2.会迭代“私有”以及“原型链上(公有)”所有“可枚举”的属性:它的循环会去原型链上找,非常消耗性能 3.只能迭代“可枚举”的属性,不可枚举的拿不到 4.不能迭代“Symbol类型”的属性 for…in 遍历对象会把原型遍历出来不 ......
原型 对象 for

kubeadm部署的k8s证书过期问题 k8s问题排查:the existing bootstrap client certificate in /etc/kubernetes/kubelet.conf is expired

解决问题: 估计跟移动有关,下面那个没解决问题,是因为在原有文件的基础上修改的吧?而这里直接是移走,重新生成了新的。不太清楚是不是这个原因。 $ cd /etc/kubernetes/pki/ $ mv {apiserver.crt,apiserver-etcd-client.key,apiserv ......
问题 certificate kubernetes k8s bootstrap

China's Ongoing Efforts In Combating Air Pollution

A new study has been conducted to understand whether the recent changes in China's air quality were driven by meteorological influences or air polluta ......
Combating Pollution Ongoing Efforts China

How to solve marine pollution in China?

Measures to prevent and control marine pollution in China Establish and improve the marine legal system and management system. Since 197 8, China has ......
pollution marine China solve How

国内各大外卖平台配送超时扣款规则 All In One

国内各大外卖平台配送超时扣款规则 All In One 规则非常不合理,霸王条款,平台垄断行为 ......
扣款 规则 平台 All One

解决nginx: [error] invalid PID number in /usr/local/nginx/logs/nginx.pid

在编辑nginx之后,运行时出现nginx已经在运行,然后输入./nginx -s reload时出现nginx: [error] invalid PID number “” in “/usr/local/nginx/logs/nginx.pid” ,进入对应目录可以看到nginx.pid里是空的, ......
nginx invalid number error local

mysql 查询报错Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column

这个错误是由于 MySQL 的新版本中默认开启了ONLY_FULL_GROUP_BY模式,即在 GROUP BY 语句中的 SELECT 列表中,只能包含分组或聚合函数,不能包含其他列。而你的查询语句中出现了一个列senior_two.score.student_id,它既没有被分组也没有被聚合,因 ......

编译Fastdfs报错——In file included from ../common/fdfs_global.c:21:0: ../common/fdfs_global.h:15:26: 致命错误:sf/sf_global.h:没有那个文件或目录

记录一下安装 fastdfs 时编译报错,报错信息如下: 原因: 这是因为我们在安装较新版得 fastdfs 时,从github 下载得安装包缺少文件,如果按照网上很多博主较早之前写的文档操作得话就会出现这样得错误,缺少了 libserverframe 网络框架 解决方法:安装 libserverf ......
global fdfs_global common fdfs sf_global

Node.js framework express.js middleware All In One

Node.js framework express.js middleware All In One express.js middlewares order ......
middleware framework express Node js

DBMS_STATS ORA-20011 Approximate NDV failed ORA-29913 error in executing ODCIEXTTABLEOPEN callout

DBMS_STATS ORA-20011 Approximate NDV failed ORA-29913 error in executing ODCIEXTTABLEOPEN callout 目录DBMS_STATS ORA-20011 Approximate NDV failed ORA-29 ......

Can't locate CPAN.pm in @INC (@INC contains: /usr/local/lib64/perl5

001、perl -MCPAN -e shell命令报错: Can't locate CPAN.pm in @INC (@INC contains: /usr/local/lib64/perl5 (以上报错提示没有安装CPAN模块) 002、解决方法 yum -y install perl-CPAN ......
INC contains locate local perl5

Tradeoffs in scalable data routing for deduplication clusters 文献阅读

前言 本文提出了一个基于集群的数据去重存储系统 GOLD 1. 高吞吐量 2. 可扩容 3. 高数据去重 问题 以何种粒度路由数据 提出原因:块大小的减小,数据去重速率会增加,但是对于更大的块大小,由于流和文件间的局部性,吞吐量会增加 方法:构建超级块 如何将超级块分配给节点 方法:使用称为bin的 ......

jackson序列化 has to be escaped using backslash to be included in string value

Jackson配置转义符的处理 // 忽略未知字段mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,false);// 允许出现特殊字符和转义符mapper.configure(JsonParser.Feature. ......
序列 backslash included jackson escaped

解决UnicodeEncodeError: 'gbk' codec can't encode character '\xa0' in position 51632: illegal multibyte sequence报错问题

在win中运行代码中有时会遇到UnicodeEncodeError: 'gbk' codec can't encode character '\xa0' in position 51632: illegal multibyte sequence报错问题 以python的pycharm为例只要在设置中 ......

No MyBatis mapper was found in ‘[SpringBoot启动类所在路径]‘ package 原因解析及解决方案

No MyBatis mapper was found in ‘[SpringBoot启动类所在路径]‘ package 原因解析及解决方案 No MyBatis mapper was found in '[XXX]' package 友情提示:搜到这篇文章的,一般是急于解决这个问题的,看下常见原因 ......
SpringBoot 路径 所在 解决方案 原因

MySQL到底是 join 性能好,还是in一下更快呢?

事情是这样的,去年入职的新公司,之后在代码review的时候被提出说,不要写join,join耗性能还是慢来着,当时也是真的没有多想,那就写in好了,最近发现in的数据量过大的时候会导致sql慢,甚至sql太长,直接报错了。这次来浅究一下,到底是in好还是join好,仅目前认知探寻,有不对之处欢迎指 ......
更快 性能 还是 MySQL join

numpy.meshgrid() in Python

numpy.meshgrid函数用于从表示笛卡尔索引或矩阵索引的两个给定一维数组中创建矩形网格。网格函数是从MATLAB中得到启发的。 语法 numpy.asarray(arr,dtype=None,order=None) 参数 x1, x2,…, xn: array_like 表示网格坐标的一维数 ......
meshgrid Python numpy in

Can't locate ExtUtils/MakeMaker.pm in @INC (@INC contains:

001、 在生成Makefile时报错如下: Can't locate ExtUtils/MakeMaker.pm in @INC (@INC contains: /usr/local/lib64/perl5 002、解决方法: yum install perl-ExtUtils-MakeMaker ......
MakeMaker INC ExtUtils contains locate