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BLE(nRF52
MySQL数据库基本命令
mysql-uroot-p2.打开全部数据库:showdatabases;3.切换数据库:use(school库);4.显示数据库中所有表的信息:describe(student表);5.查看数据库中所有的表:showta
ble
s
Java从零开始
·
2025-03-22 17:31
数据库
mysql
Vue前端实现多个条件表格搜索
文章目录操作实现效果测试json数据搜索栏条件过滤完成搜索表格栏完整代码操作实现效果在vue文件中通过js代码完成多条件搜索符合条件的ta
ble
数据,本文使用了element-ui组件创建表格。
1724580787
·
2025-03-22 15:49
前端
vue.js
javascript
【Python】 Stacking: 强大的集成学习方法
为了解决这个问题,我们可以使用集成学习(Ensem
ble
Learning)方法。集成学习通过结合多个基模型的预测结果,来提高整体模型的准确性和稳健性。Stacki
音乐学家方大刚
·
2025-03-22 15:19
Python
python
集成学习
开发语言
StarRocks 排查单副本表
2SHOWPARTITIONS命令查看ReplicationNum修改副本数命令StarRocks排查单副本表方式1查询元数据,检查分区级的副本数#方式一查询元数据,检查分区级的副本数withv_tmp1as(selectTA
BLE
_ID
Shyllin
·
2025-03-22 14:44
StarRocks
StarRocks
centos环境安装swoole后,php7无法加载swoole.so时出现na
ble
to load dynamic library 'swoole.so'
先贴上错误提示[
[email protected]
]#php-vPHPWarning:PHPStartup:Una
ble
toloaddynamiclibrary'swoole.so'(tried:/usr/
yyfx2010
·
2025-03-22 14:42
swoole
php7
swoole
php7.2
springboot自定义封装线程池工具类
首先配置线程池的配置文件,在此处定义线程池的核心线程数等核心参数:/***核心线程数=cpu核心数+1*/privatefinalintcore=Runtime.getRuntime().availa
ble
Processors
k&p
·
2025-03-22 13:30
Java
spring
boot
java
spring
【HDOJ】2050 - 2059
2055(Aneasypro
ble
m)2056(Rectangles)2057(A
_17_
·
2025-03-22 13:56
杭电OJ
考研
【数据库】MySQL数据类型decimal详解以及对于float和dou
ble
两种类型精度问题的探索
使用float和dou
ble
这两种数据类型来表示小数为什么不可以?那是因为float和dou
ble
这两种类型可能会出现精度问题如果本文出现了错误,还请路过的大佬在评论区指出,您的批评是我前进的动力!
明璐花生牛奶
·
2025-03-22 12:21
数据库
mysql
数据库
经验分享
Systemd 是 Linux 系统的 核心服务管理工具,负责管理系统的启动、服务生命周期和资源分配
核心功能功能作用说明服务生命周期管理启动、停止、重启服务(如Nginx/MySQL)依赖关系管理自动处理服务之间的依赖关系(例如:先启动数据库再启动Web服务)开机自启管理通过ena
ble
潇锐killer
·
2025-03-22 12:49
linux
运维
服务器
如何在数据库中存储小数:FLOAT、DECIMAL还是BIGINT?
此时已经完成了大部分字段的设计,可能如下:CREATETA
BLE
flights(flight_idINTAUTO_INCREMENTPRIMARYKEY,flight_numberVARCHAR(10)
NightSkyWanderer
·
2025-03-22 11:16
数据库
Go
后端
mysql
数据库
java常用排序方法集合sort
对基本类型数组(如int[],dou
ble
[]等)使用快速排序(Dual-PivotQuicksort)。对对象数组(如Integer[],String[]等)使用归并排序(TimSort)。
吗喽对你问好
·
2025-03-22 11:44
java
开发语言
数据结构
Java面试黄金宝典5
1.ConcurrentHashMap和HashTa
ble
有哪些区别原理HashTa
ble
:它继承自Dictionary类,是Java早期提供的线程安全哈希表。
ylfhpy
·
2025-03-22 10:35
Java面试黄金宝典
java
面试
开发语言
职场和发展
算法
树莓派4B arm平台aarch64 pip安装pytorch
,你执行下面这行命令pip3installtorch==1.7.1torchvision==0.8.2torchaudio==0.7.2-fhttps://torch.kmtea.eu/whl/sta
ble
-cn.html
纬领网络
·
2025-03-22 10:34
pytorch
arm
深度学习
springboot poi 后端手撕excel自定义表格。包括插入列表、跨行跨列合并
文章目录前言一、成品展示二、引入二、RestTemplateConfig三、接收实体ReturnResponse四、WriteExcelTa
ble
Controller总结前言这个程序是因为我需要根据数据库返回的数据生成
uutale
·
2025-03-22 09:55
java应用
spring
boot
excel
后端
鸿蒙开发:ArkTs语言变量和常量
变量(Varia
ble
)变量是一种用于存储数据的容器,并且其存储的数据值可以在程序执行过程中被改变,变量通常有一个名字(标识符),用于在程序中引用它。
·
2025-03-22 09:12
golang是如何回收goroutine的
目录1.写在前面2.生命周期3.必备条件1.写在前面微信公众号:[dou
ble
12gzh]关注容器技术、关注Kubernetes。问题或建议,请公众号留言。
double12gzh
·
2025-03-22 09:54
golang
golang
HashSet 扩容的底层机制说明
目录1.扩容机制说明2.底层机制说明1.扩容机制说明扩容机制:HashSet的底层就是HashMap(底层是数组+链表/红黑树),当添加元素时先得到其hash值再转换成索引,找到存取数据的ta
ble
,看这个位置是否已经存放了元素
WH牛
·
2025-03-22 09:24
java
开发语言
MySQL基本语句
CREATEDATABASEdatabase_name;1.2删除数据库DROPDATABASEdatabase_name;1.3选择数据库USEdatabase_name;1.4创建表CREATETA
BLE
ta
ble
_name
冉冉柟
·
2025-03-22 09:22
mysql
数据库
oracle
C语言复习笔记5---数组
用值直接作为下标日期处理问题数组的基本操作插入和删除逆序(移位)7-19田忌赛马(双指针)二维数组→矩阵矩阵转置判断对称矩阵矩阵运算矩阵移位杨辉三角*知识点数组:存储若干个相同的数据类型的元素intchardou
ble
floatlonglong
.又是新的一天.
·
2025-03-22 08:42
C语言复习笔记
c语言
算法
c++
MyBatis-plus 2.x -> 3.x 版本升级笔记
lambda语法模块化MP合理的分配各个包结构移除com.baomidou.mybatisplus.extension.injector.methods.additional包下的过时类fix:初始化Ta
ble
Info
三只松鼠@
·
2025-03-22 06:26
工作日常
spring
java
sql
Microsoft Visual C++ Redistributa
ble
各版本安装包合集
MicrosoftVisualC++Redistributa
ble
2019x86:https://aka.ms/vs/16/release/VC_redist.x86.exex64:https://aka.ms
Eric Woo X
·
2025-03-22 06:24
C++
Windows
microsoft
c++
开发语言
Kotlin代码示例及详细解析(Kotlin 1.3.11)
Kotlin1.3.11编译器版本//无包声明//1.基础变量声明//声明实例变量AAA1,类型为Int,初始值为0,类似C语言先声明后初始化的习惯varAAA1:Int=0//声明实例变量AAA2,类型为Dou
ble
淮山2
·
2025-03-22 06:53
kotlin
element 源码学习三 —— select 源码学习
整体结构以下是select的template结构,已去掉了一部分代码便于查看整体结构:{{selected[0].currentLabel}}1"type="info"disa
ble
-transitions
violet-jack
·
2025-03-22 05:21
JavaScript
源码学习
element
组件库
element plus ta
ble
树形数据,增、删、改子节点数据时,进行局部刷新,而不刷新整个页面
...constlistLoading=ref(false)//保存节点映射的Mapconstmaps=reactive(newMap())constload=async(row,treeNode,resolve)=>{constpid=row.idmaps.set(pid,{row,treeNode,resolve})constpost_data={parent_id:row.id,}listL
catino
·
2025-03-22 05:48
vue.js
javascript
elementui
uni-app 设置页面导航条颜色
设置每一个页面的导航栏背景颜色如:{"pages":[{"path":"pages/index/index","style":{"navigationBarTitleText":"首页",//设置页面标题文字"ena
ble
PullDownRefresh
catino
·
2025-03-22 05:48
uni-app
vue中根据html动态渲染内容
需求:根据数据中的html,因为我是在做填空,所以是需要将html中的_____替换成input,由于具体需求我使用的是元素contentedita
ble
代替的可编辑的inputhtml部分js部分//
今天吃了嘛o
·
2025-03-22 04:04
vue.js
html
javascript
使用原生ta
ble
合并单元格
先上个我要实现的页面例子1:就是最近要开发这么一个页面(这是个原型图,没有美化,大概是这个样子也都懂),刚看到的时候说实话有点儿懵的,第一次见到这样的表格,可以看到里面有很多字段,将来后台会一个个的返回给我们,其中右侧的原因是可编辑的!下面的调度主任和填写人也都是可编辑的,其他的都是后台会返回给我们的字段了,并且可以导出这咋整呢,看着就烦,里面乱糟糟的,闹心。然后开始的时候我是用element-u
会说法语的猪
·
2025-03-22 03:58
前端
vue
vue.js
javascript
表格
解析XML文件及QTa
ble
Widget示例
解析XML文件及QTa
ble
Widget示例#include"mainwindow.h"#include"ui_mainwindow.h"#include#include#includeMainWindow
ctrigger
·
2025-03-22 03:58
xml
ta
ble
合并行
{{scope.row.gdLength/10}}importtype{Ta
ble
ColumnCtx}from'element-plus';constta
ble
Data=[{"id":6140,"projectId
花归去
·
2025-03-22 03:23
vue3
element
vue.js
javascript
elementui
Linux内核srio驱动,Zynq—Linux移植学习笔记(十四):RapidIO驱动开发
defineSRIO_ZYNQ_NODE_BASEADDR0x10100#defineSRIO_ZYNQ_MAX_HOPCOUNT13structxiic_rio{structmutexlock;u8*data;};/*Weneedglobalvarria
ble
forma
weixin_39942572
·
2025-03-22 03:21
Linux内核srio驱动
pcie bar空间region [disa
ble
]无法访问
现象没有截图,下图[virtual]时需要重启host,为[disa
ble
]时可以用解决方案的命令解决方案setpcie-s01:00.0COMMAND=0x02解释thiswillena
ble
memorymappedtransfersforyourpciedevice.In4.8kernelsomethingischanges
格局视界
·
2025-03-22 02:48
PCIE
arm开发
vmware中创建qemu的嵌套虚拟化问题
在qemu启动镜像中有ena
ble
-kvm参数时报错:CouldnotaccessKVMkernelmodule:Nosuchfileordirectoryqemu-system-x86_64:failedtoinitializekvm
格局视界
·
2025-03-22 02:48
问题记录
arm开发
fpga开发
嵌入式硬件
matlab与arduino通信,【arduino】Arduino UNO智能小车和Matlab串口数据通信
clear;clc;globals1;%%//s1为光电测速传感器返回值globals2;s1=serial('COM4');set(s1,'BaudRate',38400);s1.BytesAvaila
ble
Fcn
Ja'Soon
·
2025-03-22 01:09
react-native 实现AES RSA MD5加密
importReact,{Component}from'react';import{Platform,StyleSheet,Text,View,Image,Dimensions,ScrollView,Toucha
ble
Opacity
花程序媛
·
2025-03-22 01:39
在.Net Core(.Net5)中使用开源组件SqlTa
ble
Dependency来监听ms sqlserver的数据库数据变化
文章目录1、本文主要说明在.NetCore(Demo为.Net5)中使用开源组件SqlTa
ble
Dependency来监听mssqlserver的数据库数据变化2、github地址:https://github.com
Lingbug
·
2025-03-22 00:32
数据库
.netcore
.net
【MySQL】插入查询结果,聚合函数
6.5插入查询结果语法:INSERTINTOta
ble
_name[(column[,column...])]SELECT...案例:删除表中的的重复记录,重复的数据只能有一份--创建原数据表CREATETA
BLE
duplicate_ta
ble
熙曦Sakura
·
2025-03-21 23:23
MySQL
mysql
数据库
【Kivy App】Bub
ble
气泡使用方法、常用属性和Bub
ble
Button按钮实例
在Kivy中,Bub
ble
是一个用于显示浮动气泡的UI组件,通常用于显示上下文菜单、提示信息或其他浮动内容。Bub
ble
可以包含多个子组件,例如Bub
ble
Button(气泡按钮)。
Botiway
·
2025-03-21 20:00
移动APP
Kivy
python
FIN41920 Sustaina
ble
Finance
FIN41920Sustaina
ble
FinanceGroupProject2025ThepurposeofthisprojectistoevaluatetheabilityofapplyingUStoxicemissiondataandaccountingdatatoanalysetheeffectoftoxicemissionsonfirms
·
2025-03-21 20:53
后端
COMP 5076 Pro
ble
m Solving in the Digital Age
COMP5076Pro
ble
mSolvingintheDigitalAgeAssignment1–Wizard-of-OzPaperPrototypeUniSASTEMTheUniversityofSouthAustralia2025SP2Warning
·
2025-03-21 20:52
后端
3090显卡Ktransformer本地部署deepseek R1:70B
配置环境下载deepseekR170B下载ktransoformer开始安装运行Web启动常见问题runtimeerrordon'tmatch更新cudaERROR:Failedtobuildinstalla
ble
wheelsforsomepyproject.tomlbasedprojects
SIATdog
·
2025-03-21 20:59
ai
基于kylin-v10安装docker
1、下载地址Indexoflinux/static/sta
ble
/x86_64/2、下载docker-24.0.5.tgz.tar版本3、上传服务器解压tarxvfdocker-24.0.5.tgz.tar4
神奇侠2024
·
2025-03-21 20:22
redis
kylin
大数据
docker
Java多线程与高并发专题——Calla
ble
和 Runna
ble
的不同?
为什么需要Calla
ble
?Runna
ble
的缺陷Runna
ble
是JDK1.0就有的,而Calla
ble
是JDK1.5新增的,那我们为什么需要Calla
ble
?
黄雪超
·
2025-03-21 19:47
技术基础
java
开发语言
并发编程
flutter报错:Could not find com.meituan.android.walle:plugin
整体报错情况(解决美团渠道包源拉不下来的问题):Apro
ble
moccurredconfiguringrootproject'android'.
xtyzmnchen
·
2025-03-21 18:44
flutter
android
ssh命令
ssh命令无需密码也可登录要先关闭防火墙,命令如下:systemctlstopfirewalldsystemctldisa
ble
firewalldsystemctlstatusfirewalldeg:目标
满分对我强制爱
·
2025-03-21 18:32
linux
服务器
运维
spark
mysql修改表中所有字段不许为空_如何用SQL语句修改一个表的字段,让它不能为空...
展开全部ALTERTA
BLE
表ALTERCOLUMN[字段名]字段类型NOTNULLSQL语句1、基32313133353236313431303231363533e78988e69d8331333365643661
Asama浅间
·
2025-03-21 17:00
OpenCV图像拼接(2)基于羽化(feathering)技术的图像融合算法拼接类cv::detail::Feather
Ble
nder
操作系统:ubuntu22.04OpenCV版本:OpenCV4.9IDE:VisualStudioCode编程语言:C++11算法描述cv::detail::Feather
Ble
nder是OpenCV
村北头的码农
·
2025-03-21 17:26
OpenCV
opencv
算法
人工智能
freecad嵌入工作台
FreeCADcanbeimportedasaPythonmoduleinotherprogramsorinastandalonePythonconsole,togetherwithallitsmodulesandcomponents.It’sevenpossi
ble
toimporttheFreeCADuserinterfaceasapythonmodulebutwi
黄河里的小鲤鱼
·
2025-03-21 16:23
软件开发
建模
python
对数据库的总结
3.库表操作结构:MySQL和Oracle,通用工具Navicat4.SQL语句的库表操作:createta
ble
:创建表alterta
ble
:修改表dropta
ble
:删除表truncateta
ble
·
2025-03-21 16:46
java
SpringBoot集成Swagger3.0
pom.xmlio.springfoxspringfox-boot-starter3.0.0SwaggerConfig/***@author:zek*@desc:swagger*/@Ena
ble
OpenApi
邪神大叔
·
2025-03-21 16:19
Java
Mac
SpringBoot
swagger3.0
java
springboot
Spring boot快速接入Swagger
依赖 io.springfox springfox-swagger2 2.6.0 io.springfox springfox-swagger-ui 2.6.02.配置项目2.1增加@Ena
ble
Swagger2
lucky_iboy
·
2025-03-21 16:48
后端
java
swagger2
spring
boot
后端
gson
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