E-COM-NET
首页
在线工具
Layui镜像站
SUI文档
联系我们
推荐频道
Java
PHP
C++
C
C#
Python
Ruby
go语言
Scala
Servlet
Vue
MySQL
NoSQL
Redis
CSS
Oracle
SQL Server
DB2
HBase
Http
HTML5
Spring
Ajax
Jquery
JavaScript
Json
XML
NodeJs
mybatis
Hibernate
算法
设计模式
shell
数据结构
大数据
JS
消息中间件
正则表达式
Tomcat
SQL
Nginx
Shiro
Maven
Linux
蓝牙ble
牛客周赛 Round 59(思维、构造、数论)
#includeusingnamespacestd;intmain(){dou
ble
n,m;ci
mldl_
·
2025-07-05 20:27
数据结构与算法
算法
数论
逆序数
构造
对角线处理
范德蒙恒等式
准备数仓实习面试中回顾SQL题
550-game-play-analysis-ivhttps://leetcode.com/pro
ble
ms/game-play-analysis-iv/description/连续两天登录的比率,2025
zhuiQiuMX
·
2025-07-05 19:23
sql
python之海象运算符
简介海象运算符是一种语法糖,有一个:和一个=构成,语法格式如下:(varia
ble
_name:=expression)一般海象运算符有三种用法,如下ifelseifelse中还是比较常用的#if语句中a
youhebuke225
·
2025-07-05 19:53
python
python
PDF accessibility features simplify Crack
PDFaccessibilityfeaturessimplifyCrackPDFaccessibilityfeaturessimplifycompliance,savingdeveloperstimewhileensuringdocumentsmeetkeystandards.AccessibilitysupportinPDFcomponentsena
ble
sdeveloperstoproduce
SEO-狼术
·
2025-07-05 19:47
Delphi
net
控件
pdf
python中报错Traceback (most recent call last): File “<stdin>“, line 1, in <module>TypeError: ‘str‘ obj
len('hello')如果运行该代码则会报错:Traceback(mostrecentcalllast):File"",line1,inTypeError:'str'objectisnotcalla
ble
bk小兔子乖乖
·
2025-07-05 19:47
python
java
前端
[华为eNSP] 在eNSP上实现IPv4地址以及IPv4静态路由的配置
设备名称配置重命名设备以及关闭信息提示此处以R1演示,R2R3以此类推system-view[Huawei]sysnameR1#关闭提示undoinfo-centerena
ble
配置路由接口IP地址R1
Demisse
·
2025-07-05 18:16
网络
华为
网络
服务器
eNSP
MySQL多表查询进阶实战:连接与子查询深度解析
一、多表连接核心原理1.七种JOIN操作--创建测试数据CREATETA
BLE
departments(dept_idINTPRIMARYKEY,dept_nameVARCHAR(50));CREATETA
BLE
employees
·
2025-07-05 17:37
SVG 安装使用教程
一、SVG简介SVG(Scala
ble
VectorGraphics,可缩放矢量图形)是一种基于XML的图像格式,用于描述二维图形。
小奇JAVA面试
·
2025-07-05 16:31
安装使用教程
SVG
Linux内核支持几级页表,Linux内核4级页表的演进(转)
Linux内存管理中coreVM代码中,关于页表(pageta
ble
s)管理的代码是个重点,是虚拟内存(VirtualMemory,VM)的基石,本文探讨Linux的页表实现及发展过程。
写剧本的
·
2025-07-05 15:56
Linux内核支持几级页表
疏锦行Python打卡 DAY 33 MLP神经网络的训练
importtorchtorch.cudaimporttorch#检查CUDA是否可用iftorch.cuda.is_availa
ble
():print("CUDA可用!")
·
2025-07-05 15:22
STM32控制四自由度机械臂(SG90舵机)(硬件篇)(简单易复刻)
1.前期硬件准备2s锂电池一个(用于供电),stm32f103c8t6最小系统板一个(主控板),两个摇杆(用于摇杆模式),四个电位器(用于示教器模式),一个
蓝牙
hc-05(用于
蓝牙
模式已经串口打印信息方便调试
·
2025-07-05 14:49
图片优化 工具 linux,PNG的专用优化图像工具-Optipng
PNG即Porta
ble
NetworkGraphic的简称,PNG图像是一种无损压缩图像文件格式。因为网络传输的需要,我们总是希望PNG图像的容量能够小些、小些、再小些。
·
2025-07-05 13:37
C# 中的 .Select() 方法与 JavaScript 中的 .map() 方法功能类似,都是用于对集合中的每个元素进行转换并返回新的集合。
:constnumbers=[1,2,3];constsquared=numbers.map(x=>x*x);//结果:[1,4,9]2.C#的.Select()遍历集合(如List、IEnumera
ble
NPCZ
·
2025-07-05 12:34
c#
javascript
Jenkins-Email Extension 插件插件
Edita
ble
EmailNotificationEdita
ble
EmailNotification是Jenkins的EmailExtension插件的核心功能,用于自定义邮件通知,包括邮件主题、内容、
会又不会
·
2025-07-05 12:58
自动化测试
jenkins
运维
MySQL升级5.7.28到5.7.44以及8.0.22到8.0.35
-5.7.44属于MySQL的小版本升级升级前检查检查mysql的启动方式ps-ef|grepmysqld检查MySQL的安装路径以及数据文件路径whereismysqlmysql>showvaria
ble
slike
Romona_J
·
2025-07-05 10:47
mysql
adb
android
[C++] # 深入理解C++继承:从原理到实现
继承类型二、继承的内存模型2.1对象的内存布局2.2内存布局分析三、构造函数与析构函数的执行顺序3.1构造顺序3.2析构顺序四、函数重写与虚函数4.1函数重写(覆盖)4.2虚函数与多态五、虚函数表(vta
ble
·
2025-07-05 09:38
Java测试题一
浮点型:float、dou
ble
。布尔型boolean。字符型:char2.下列代码的输出是什么?为什么?
·
2025-07-05 08:31
vue3 el-ta
ble
回显选中的数据
html部分:{{scope.$index+1}}添加删除js部分:letmatchLists=ref([{source_id:1,title:'比赛1'},{source_id:2,title:'比赛2'},{source_id:3,title:'比赛3'},{source_id:4,title:'比赛4'},{source_id:5,title:'比赛5'},])letsource_ids=r
凉xiao薄
·
2025-07-05 08:00
vue.js
elementui
javascript
Sta
ble
Diffusion生成素描风格的技术要点
Sta
ble
Diffusion生成素描风格的技术要点关键词:Sta
ble
Diffusion、素描风格、图像生成、技术要点、AI绘画摘要:本文围绕Sta
ble
Diffusion生成素描风格图像展开,深入探讨了其中的技术要点
AI智能应用
·
2025-07-05 07:29
stable
diffusion
人工智能
ai
WPS JS宏示例——工作表排序
”对工作表进行排序是很常见的需求了,这里直接写个通用的宏给不熟悉的朋友使用:/***@param{object|string}Workbook工作薄名称*@returns{array}obj.visi
ble
学点笔记
·
2025-07-05 07:24
WPS
JS宏入门进阶
javascript
wps
MYSQL数据库表结构修改
1.表名的修改语法如下:ALTERTA
BLE
表名RENAMETO新表名注意:修改表名还可以执行命令:RENAMETA
BLE
表名TO新表名;例:将mybatis数据库中Register名改为bbs_Register
·
2025-07-05 07:24
Python AI 绘画安装
安装PythonAI绘画环境(如Sta
ble
Diffusion)可以让你在本地或云端用文本生成图像。
只只283
·
2025-07-05 06:51
python
人工智能
Windows中安装python-embed版本和VSCode免安装版本python开发环境
python-embed版本下载安装官网下载:下载地址Tips:下载Windowsembedda
ble
package安装方法:解压到指定目录即可,无需安装配置环境变量python.exe文件目录配置到Path
Effordson
·
2025-07-05 05:46
Python学习
windows
python
vscode
mysql 递归函数with recursive的用法
要给列添加别名,可以使用AS关键词后跟别名例子1:SELECT[column_1|expression]AScol_nameFROMta
ble
_name;如果别名包含空格,则必须引用以下内容:例子2:SELECT
xiaoweiwei99
·
2025-07-05 05:15
面试
学习路线
阿里巴巴
android
前端
后端
mysql -- WITH RECURSIVE 语法
它允许你定义一个CommonTa
ble
Expression(CTE),该CTE可以引用自身的输出。
·
2025-07-05 05:15
java: JPS 增量注解处理被禁用
java:JPSincrementalannotationprocessingisdisa
ble
d.Compilationresultsonpartialrecompilatio2022.3.17号早上
因我你好久不见
·
2025-07-05 05:12
maven
intellij-idea
mysql5.7 windows版本 忘记密码
目录1.编辑配置文件2.重启服务3.无密码登录4.修改密码1.编辑配置文件找到你的my.cnf/my.ini文件:[mysqld]skip-grant-ta
ble
s#添加这行如果忘记配置文件,打开服务,
·
2025-07-05 04:40
FPGA内部资源介绍
Xilinx公司称它为CLB(Configura
ble
LogicBlock),而Altera公司称
cycf
·
2025-07-05 02:58
FPGA之道
fpga开发
maven中settings.xml仓库配置
aliyunmaven*阿里云公共仓库https://maven.aliyun.com/repository/publicrepo1centralHumanReada
ble
NameforthisMirror.https
苏开印印印
·
2025-07-05 02:27
成功解决运行:Django框架提示:no such ta
ble
: django_session
文章目录前言1.检查数据库配置2.运行数据库迁移命令3.检查数据库权限4.手动删除数据库文件(仅适用于SQLite)5.检查中间件配置前言当在运行Django框架时出现nosuchta
ble
:django_session
懂搬砖
·
2025-07-05 02:26
Python小白成长记
常见问题解决
原力计划
django
sqlite
python
「日拱一码」017 深度学习常用库——TensorFlow
目录基础操作张量操作:tf.constant用于创建常量张量tf.Varia
ble
用于创建可训练的变量张量tf.reshape可改变张量的形状tf.concat可将多个张量沿指定维度拼接tf.split
·
2025-07-05 01:23
SVG VSCode:深度解析与最佳实践
SVG(Scala
ble
VectorGraphics
froginwe11
·
2025-07-05 01:22
开发语言
ArcGIS Pro SDK (七)编辑 2 启用编辑
Project.Current.IsEditingEna
ble
d){varres=MessageBox
Winemonk
·
2025-07-05 01:20
ArcGIS
Pro
SDK
arcgis
arcgis
pro
sdk
gis
c#
宽表设计(Wide Ta
ble
) 与 子表 + 类型 + 属性表设计(EAV 模型或“属性表”模型)
本文将讨论两种主流方案——宽表设计(WideTa
ble
)与子表+类型+属性表设计(EAV模型或“属性表”模型),并从可维护性、性能、适用场景等方面进行系统分析。一、方案一:宽表设计(Wid
nbsaas-boot
·
2025-07-05 00:17
数据库
Vitest mock modules function in only one test and use the actual function in others
问题背景:Thefollowingisanabstractionofmypro
ble
mandthusdoesnotmaketoomuchsense:以下是我问题的抽象,因此并没有太多意义。
营赢盈英
·
2025-07-04 23:43
前端技术
前端
javascript
开发语言
nuxt.js
vitest
unit-testing
怎么限制某些IP访问服务器?
您可以通过多种方式限制特定IP地址访问您的服务器,以下是几种常见的方法:1.使用防火墙限制IP访问Linux系统(ipta
ble
s)#阻止单个IPipta
ble
s-AINPUT-s192.168.1.100
莱卡云(Lcayun)
·
2025-07-04 23:42
tcp/ip
服务器
网络协议
云计算
linux
服务器如何配置防火墙规则开放/关闭端口?
以下是主流系统的详细操作指南:一、Linux系统(ipta
ble
s/firewalld/UFW)1.ipta
ble
s(传统方式)#查看当前规则sudoipta
ble
s-L-n#开放端口(如80/TCP)
莱卡云(Lcayun)
·
2025-07-04 23:40
服务器
云计算
linux
安全
【unitrix】 4.16 类型级别左移运算实现解析(shl.rs)
源码这段代码实现了一个类型级别的左移运算(ShlforZ0{typeOutput=Z0;fnshl(self,_:R)->Self::Output{Z0}}//Zeroleftshiftedbyavaria
ble
amountisstillzero
liuyuan77
·
2025-07-04 23:09
我的unitrix库
rust
QSqlDatabasePrivate::database: una
ble
to open database: “[Microsoft][ODBC SQL Server Driver][DBNETLI
这个错误提示表明程序无法连接到SQLServer数据库,常见原因和解决方案如下:连接参数错误确认服务器名称、端口、数据库名是否正确示例连接字符串格式:DRIVER={SQLServer};SERVER=服务器地址;DATABASE=数据库名;UID=用户名;PWD=密码网络连接问题检查SQLServer服务是否正在运行确认服务器IP和端口可访问(默认TCP端口1433)检查防火墙是否允许数据库端口
道亦无名
·
2025-07-04 23:08
数据库入门
数据库
microsoft
如何使用RViz进行机器人路径规划的可视化?
一、环境准备安装ROS与相关功能包#以ROS2Hum
ble
为例sudoaptinstallros-hum
ble
-navigation2ros-hum
ble
-nav2-bringup准备机器人模型(URDF
start_up_go
·
2025-07-04 23:38
机器人与ros系统应用
rviz
rviz可视化
Docker 网络中 `ipta
ble
s` 与 Linux Namespace 行为详解:原理、链路与实战排查路径
Docker网络中ipta
ble
s与LinuxNamespace行为详解:原理、链路与实战排查路径关键词:Docker网络、ipta
ble
s、LinuxNamespace、容器隔离、NAT转发、网络命名空间
观熵
·
2025-07-04 23:37
Docker
docker
网络
linux
配置uwsgi为系统服务遇到State ‘stop-sigterm‘ timed out解决方法
systemctlstatusuwsgi●uwsgi.service-TheuWSGIserverLoaded:loaded(/usr/lib/systemd/system/uwsgi.service;disa
ble
d
fangeqin
·
2025-07-04 23:05
linux系统服务
linux
uwsgi
systemctl
Linux安装Python失败常见缺失依赖项
Thispro
ble
misbecauseyoudidn’tinstallthedependencypackage.Youmayfirs
xcosy
·
2025-07-04 23:35
Python
python
someip工作涉及网络命令整理
1.ipta
ble
s-PINPUTACCEPT//用于Android上关闭防火墙2.pfctl-d//用于QNX上关闭防火墙3.创建VLAN接口3.1iplinkiplinkaddlinkenx002432280522namefyusb
·
2025-07-04 23:34
C语言中的“记忆者”:静态局部变量与自动局部变量的深度对比
我们之前探讨了变量的作用域,今天我们将聚焦于两种特殊的局部变量:自动局部变量(AutoLocalVaria
ble
s)和静态局部变量(StaticLocalVaria
ble
s)。
web安全工具库
·
2025-07-04 22:02
2025C++学习
c语言
java
jvm
Linux 宝塔mysql莫名其妙数据库不见了恢复数据库
:宝塔安装的mysql线上运行突然表包括库都不见了,想办法恢复数据库登陆mysqlcd/www/server/mysql/binmysql-uroot-p查看binlog日志是否打开showvaria
ble
slike'log
·
2025-07-04 21:27
c# 在sql server 数据库中批插入数据
批量插入数据的几种高效方法及代码示例:1.SqlBulkCopy类(最高效)usingSystem.Data.SqlClient;publicstaticvoidBulkInsertWithSqlBulkCopy(DataTa
ble
data
StevenChen85
·
2025-07-04 20:50
上位机
C#
数据库
数据库
c#
ListExtension 扩展方法增加 转DataTa
ble
()方法
方法1.判断集合是否为Null2.判断集合是否不为Null3.判断集合是否有值4.拼接成字符串5.根据一个表达式去除重复6.转DataTa
ble
泛型对象转换方法//////集合扩展方法///publicstaticclassListExtension
·
2025-07-04 20:18
力扣199-二叉树的右视图-C++
null,4]输出:[1,3,4]示例2:输入:[1,null,3]输出:[1,3]示例3:输入:[]输出:[]来源:力扣(LeetCode)链接:https://leetcode-cn.com/pro
ble
ms
TLJava^v^
·
2025-07-04 19:12
数据结构
#
力扣-C++
c++
力扣
二叉树
右视图
层次遍历
ASCII 码表
二进制八进制十进制十六进制字符01000000403220space(novisi
ble
glyph)01000010413321!01000100423422"0100011
IMPYLH
·
2025-07-04 18:38
笔记
上一页
4
5
6
7
8
9
10
11
下一页
按字母分类:
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
其他