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蓝牙低功耗BLE
MySQL数据库行级锁之间隙锁、临键锁
间隙锁默认情况下,InnoDB在REPEATA
BLE
READ事务隔离级别运行,InnoDB使用next-key锁进行搜索和索引扫描,以防止幻读。
zhxjfjfkkfkfkeo
·
2024-09-09 08:17
mysql
数据库
mysql
gee mysql数据库_MySQL
答:主要分List、Set、Map、Queue四类,其中包含ArrayList、LinkedList、HashSet、TreeSet、HashMapCompara
ble
和Comparator接口的区别?
weixin_39955142
·
2024-09-09 08:16
gee
mysql数据库
python报错AttributeError:'module' object has no attribute 'xxxxx'
AttributeError:'module'objecthasnoattribute'getListOfTa
ble
'二、问题分析仔细看代码:1、模块之间是有引用的,但都已经import了,没问题!
weixin_33857230
·
2024-09-09 08:46
python
java
CentOS7 安装Docker,并配置阿里云镜像
gccyum-yinstallgccgcc-c++1.2、安装需要的软件包yuminstall-yyum-utilsdevice-mapper-persistent-datalvm21.3、设置sta
ble
JBryan
·
2024-09-09 08:53
一个SQL查询出表结构
selectta
ble
_schemaas“数据库”,ta
ble
_nameas“表名”,ta
ble
_rowsas“记录数”,truncate(data_length/1024/1024,2)as“数据容量
初秋和
·
2024-09-09 08:14
sql
数据库
mysql
Leetcode 两数之和
这道题利用Hashta
ble
哈希表来做。如果不使用hashta
ble
,进行暴力循环的话,时间复杂度较高O(N2)O(N^2)O(N2)。
Wils0nEdwards
·
2024-09-09 07:43
Leetcode
leetcode
哈希算法
散列表
代码随想录day08|344.反转字符串、541.反转字符串Ⅱ、替换数字
欢迎大家前来讨论~文章目录字符串Part01一、基础知识学习二、题目题目一:[344.反字符串](https://leetcode.cn/pro
ble
ms/reverse-string/)思路:题目二:
LluckyYH
·
2024-09-09 07:12
算法
c++
leetcode
什么是脏读、幻读、不可重复读?
本文将深入探讨脏读(DirtyRead)、幻读(PhantomRead)和不可重复读(Non-repeata
ble
Read)的概念、区别、示例及实际应用,帮助你全面理解这些并发问题及其解决方案。
需要重新演唱
·
2024-09-09 06:06
数据库
服务器
运维
爱心代码源码
#define_CRT_SECURE_NO_WARNINGS1#include#include#include#include#include#includestructPoint{dou
ble
x,y;
北航最菜大学生
·
2024-09-09 06:06
c++
蓝牙
--关于bta_ag_rfc.cc文件的讲解
在
蓝牙
通信中,HF通常是支持HFP(Hands-FreeProfile)协议的设备,例如
蓝牙
耳机、汽车
蓝牙
系统等。AG(AudioGateway)测:是指作为音频的输入和输出网关的设备。
专业开发者
·
2024-09-09 06:35
蓝牙
学习
java 中subtract的用法_java中BigDecimal加减乘除基本用法
双精度浮点型变量dou
ble
可以处理16位有效数。在实际应用中,需要对更大或者更小的数进行运算和处理。
丹力
·
2024-09-09 06:03
java
中subtract的用法
2019-03-13 An Easy Pro
ble
m
#include#include#includeusingnamespacestd;constintmaxn=20;intb[maxn],h[maxn];intmain(void){b[0]=1;intcnt=19;for(inti=1;i>n;while(n!=0){if(n>=b[cnt]){n-=b[cnt];h[cnt]=true;}cnt--;}for(inti=19;i>=0;i--)
桐桑入梦
·
2024-09-09 06:30
【Java】已解决:com.alibaba.dubbo.rpc.RpcException: No provider availa
ble
from registry
正确代码示例服务提供者配置服务消费者配置注册中心配置(application.properties)五、注意事项已解决:com.alibaba.dubbo.rpc.RpcException:Noprovideravaila
ble
fromregistry
屿小夏
·
2024-09-09 05:59
java
dubbo
rpc
pythongui 三维_PyQt5嵌入mayavi-python显示三维实体
#First,andbeforeimportinganyEnthoughtpackages,settheETS_TOOLKIT#environmentvaria
ble
toqt4,totellTraitsthatwewilluseQt.importos
weixin_39565910
·
2024-09-09 05:24
pythongui
三维
Leveldb源码分析--9
6SSTa
ble
之36.5读取ssta
ble
文件6.5.1类层次Ssta
ble
文件的读取逻辑在类Ta
ble
中,其中涉及到的类还是比较多的,如图6.5-1所示。
sparkliang
·
2024-09-09 04:23
Leveldb
分布式系统
通过mvn dependency:tree 查看依赖树,解决依赖jar冲突问题
举例:E:\01workspace\chenxh\09research\rop\rop>mvndependency:tree[WARNING][WARNING]Somepro
ble
mswereencounteredwhilebuildingtheeffectivesettings
常敲代码手不生
·
2024-09-09 04:23
IDEA学习与实践
BZOJ-2521: [Shoi2010]最小生成树(最小割)(本蒟蒻的BZOJ第401 AC撒花~)
题目:http://www.lydsy.com/JudgeOnline/pro
ble
m.php?
AmadeusChan
·
2024-09-09 04:18
Element-ui设置ta
ble
选中某行高亮自定义背景色
Element-ui设置ta
ble
选中某行高亮自定义背景色在el-ta
ble
标签中添加单选highlight-current-row在style中设置颜色/*设置当前页面element全局ta
ble
选中某行时的背景色
iOS_MingXing
·
2024-09-09 04:18
ui
elementui
系统误删文件,提示有病毒,易感染文件,Windows系统如何关,antimalware service executa
ble
最近电脑经常莫名卡顿,打开任务管理器,发现有这么个antimalware…的顽固的运行ing,而且还拒绝访问我关闭它。看了网上的帖子,win10家庭版可以通过一段程序安装组策略,但是一顿操作后还是关不了。然而我一顿找办法后最终发现了一个最傻瓜式的简单的方法:即:**360安全卫士—优化加速一下,嗖就好了!!!!**我凑,果然需要同行竞争啊。快去试试吧小伙伴!!!!!!!终于吧这个顽固跟“病毒”一样
海海不掉头发
·
2024-09-09 03:12
电脑错误
org.springframework.http.converter.HttpMessageNotReada
ble
Exception错误原因及解决办法
:@RequestBody只支持POST请求,GET请求不能使用@RequestBody,修改GET请求为POST即可,如果需要使用GET请求,可以使用@RequestParam和@PathVaria
ble
海海不掉头发
·
2024-09-09 03:11
idea
springboot
双vip高可用的MySQL集群
文章目录项目介绍项目架构项目环境项目步骤环境准备Ansi
ble
服务器部署1、安装Ansi
ble
2、配置免密登录3、修改Ansi
ble
的主机清单Prometheus部署1、下载软件包2、二进制安装PrometheusServer3
Hi,你好啊
·
2024-09-09 02:10
数据库
mysql
数据库
高可用
vue3+ant design vue实现表格导出(后端返回文件流类型导出)
1、之前的博客介绍了,依据页面展示的ta
ble
表格数据为基础展示表格导出,今天介绍下后端返回文件流来实现表格导出。
炒毛豆
·
2024-09-09 02:09
vue.js
前端
javascript
Angular Dashboard 项目教程
AngularDashboard项目教程angular-dashboardSkeletonforaresponsiveandfullycustomiza
ble
AngularDashboard项目地址:https
郁俪晟Gertrude
·
2024-09-09 02:07
【LINUX】阿里云linux服务器上使用ipta
ble
s设置安全策略的方法_status=$(grep -i ubuntu etc issue)
yuminstall-yipta
ble
sipta
ble
s安装好后就可以来配置规则了。
2401_85154737
·
2024-09-09 02:04
linux
服务器
阿里云
达梦数据库:获取建表SQL、创建索引SQL、DBMS_METADATA.GET_DDL
目录简介SQL简介对接达梦数据库,程序需要根据日期自动创建数据库表,本篇记录自动创建表需要用到的相关SQLSQL取建表SQLSELECTDBMS_METADATA.GET_DDL('Ta
ble
','表名
天黑请闭眼
·
2024-09-09 01:02
第三方对接
数据库
【nvm】误操作npm install npm@latest -g如何回退
node版本是14.19.1,那误操作npminstallnpm@latest-g后的npm版本已经不适用node版本了,此时要做回退操作1、查看当前可下载nodejs的最高版本nvmlistavaila
ble
2
纳米小川
·
2024-09-09 01:02
nodejs
nvm
npm
前端
node.js
npm
nvm
web自动化时,关闭浏览器“正受自动化控制“提示语和关闭保存密码提示框
fromselenium.webdriver.chrome.optionsimportOptionsfromseleniumimportwebdriveroptions=Options()#1、取消chrome受自动控制提示---加上'ena
ble
-automation
吴少凡
·
2024-09-09 01:01
python
pytest
pycharm
selenium
Django 缓存
中添加CACHES={'default':{'BACKEND':'django.core.cache.backends.db.DatabaseCache','LOCATION':'my_cache_ta
ble
weixin_43640594
·
2024-09-09 01:01
django
缓存
python
nrf51822 secure DFU by OTA: How to Set Password in the DFU zip File
\nRF51_SDK_10.0.0\nRF51_SDK_10.0.0_dc26b5e\examples\
ble
_peripheral\
ble
_app_hrsthe
Chia-Te Kuan
·
2024-09-09 01:24
nRF51822
IoT
dfu
nrf51822
security
password
OWASP: OWASP Dependency-Check install and usage 安裝與使用說明
contentVaria
ble
sHowtoinstallOWASPDependency-CheckJAVAInstallationyarnInstallationImportYarnGPGkeysandena
ble
YarnreponpmNET8.0InstallationDownloadDependency-checkandinstallHowtorundependency-checkGenera
Chia-Te Kuan
·
2024-09-09 01:24
OWASP
經驗談
分析工具
c++
SBOM
STQC
linux
c语言
MySQL运维学习(1):4种日志
发生任何严重错误时的信息,若数据库无法正常使用时,可以先查看错误日志默认情况下错误日志是开启的,文件名为/var/log/mysqld.log,如果文件不在默认位置,可以通过下面的命令查看其位置:showvaria
ble
slike
入门如入土
·
2024-09-09 00:54
学习
Analyzing CPU Usage with Perf (1) - preparation
contentAboutPerfBuildingPerf-ena
ble
dFirmwareBuildingPerf-ena
ble
dFirmwareEna
ble
PerfinLinuxKernelConfigchecktheresultBuildingandInstallingPerfAddThreadNamestoApplicationCompilingApplicationforStackTraci
Chia-Te Kuan
·
2024-09-09 00:20
交叉編譯
分析工具
chrome
前端
Python常用模块
Python常用模块I1.内置模块(不用import就可以直接使用)常用内置函数:help(obj)在线帮助,obj可是任何类型calla
ble
(obj)查看一个obj是不是可以像函数一样调用repr(
xbgordon
·
2024-09-09 00:19
Python脚本
Python
OS
正则表达式
F#
C
clickhouse对比两台机器数据
selectconcat(database,'.',name),total_rowsfromsystem.ta
ble
swhereengine='MergeTree'anddatabase!
微亮之海
·
2024-09-09 00:19
clickhouse
学习VB语言的步骤和资源
DimmyVaria
ble
AsInteger-**条件语句**:使用`If...Then...Else`。
Crystal Cui
·
2024-09-08 23:47
数据库
VB
python tkinter tkinterta
ble
pythontkintertkinterta
ble
Excel数据显示到GUI上本文适用于tkinterGUI显示Excel数据pythonExcel数据显示pythontkintertkinterta
ble
Excel
不羁绊Delta风
·
2024-09-08 23:16
python
tkinter
可视化
java用poi操作excel .xls和.xlsx格式
www.andykhan.com/jexcelapi/index.htmljxl似乎不支持2007,2010jxl读取excel2010报错jxl.read.biff.BiffException:Una
ble
torecognizeOLEstreamatjxl.read.biff.CompoundFile
躁动的青年
·
2024-09-08 23:14
poi
java
操作
excel
poi
xlsx
使用Tkinter创建交互式表格:TkinterInterTa
ble
详解
使用Tkinter创建交互式表格:TkinterInterTa
ble
详解是一个Python库,它将TkinterGUI工具包与pandasDataFrame相结合,为开发者提供了一种简单、直观的方式来在图形界面中展示和操作数据表格
蓬玮剑
·
2024-09-08 23:44
Hbase、hive以及ClickHouse的介绍和区别?
HBase的设计灵感来源于Google的Bigta
ble
论文,它通过提供类似于Bigta
ble
的能力,在Hadoop之上构建了一个高可靠性、高性能、面向列、可伸缩的分布式存储系统。
damokelisijian866
·
2024-09-08 23:43
hbase
hive
clickhouse
Jenkins 通过 Version Number Plugin 自动生成和管理构建的版本号
在“Availa
ble
”选项卡中搜索“VersionNumberPlugin”。选中并安装插件,完成后可能需要重启Jenkins。步骤2:配置版本号生成打开项目配置页面。
让梦想疯狂
·
2024-09-08 23:41
Jenkins
jenkins
InnoDB引擎之-两次写(Dou
ble
Write)
InnoDB引擎有几个重点特性,为其带来了更好的性能和可靠性:插入缓冲(InsertBuffer)两次写(Dou
ble
Write)自适应哈希索引(AdaptiveHashIndex)异步IO(AsyncIO
胸毛飘逸
·
2024-09-08 22:33
Unity安卓Gradle打包的一些报错
先是出现了个关于gradle工具的"android.ena
ble
R8=false"的错误,说是gradle在5.0以上就不支持对该参数的修改(改成true或其他也是报错),解决:直接找到对应编辑器下的,
Comthr
·
2024-09-08 22:36
android
unity
map与starmap
1.map函数用法:map(function,itera
ble
,...)功能:map会将提供的function应用于可迭代对象的每个元素,如果有多个可迭代对象,map会将它们的元素组合起来并传递给function
给我起把狙
·
2024-09-08 21:33
python
STM32点灯-关于GPIO_Init问题
include"Delay.h"intmain(void){//1.UseRCCtostarttheGPIO'sCLKRCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENA
BLE
WfDal
·
2024-09-08 21:30
stm32
嵌入式硬件
单片机
2018-01-16判断相机
pragmamark-摄像头和相册相关的公共类//判断设备是否有摄像头-(BOOL)isCameraAvaila
ble
{return[UIImagePickerControllerisSourceTypeAvaila
ble
super_2e20
·
2024-09-08 20:47
改写二进制文件
常见十六进制编辑器:HxD(Windows)HexFiend(macOS)GHex(Linux)
Ble
ss(Linux)步骤:打开十六进制编辑器。加载你要修改的二进制文件。
爱吃瓜的猹z
·
2024-09-08 20:22
Linux
计算机
C语言
计算机
Java解答 求出e的值
publicclassMain{publicstaticvoidmain(String[]args){Scannerin=newScanner(System.in);intn=in.nextInt();dou
ble
x
黄小莫
·
2024-09-08 18:15
java
深度优先
开发语言
gd32 定时器时钟_GD32E5 系列定时器全面助力工业互联网
这系列MCU采用台积电
低功耗
40纳米(40nm)嵌入式闪存工艺构建,具备业界领先的处理能力、功耗效率、连接特性和更经济的开发成本,进一步推动嵌入式开发向高精度工业控制领域扩展,解决数字电源、电机变频、测量仪器
weixin_39861054
·
2024-09-08 18:45
gd32
定时器时钟
【转】oracle之报错:ORA-00054: 资源正忙,要求指定 NOWAIT
SQL>dropta
ble
student2;dropta
ble
student2ORA-00054:资源正忙,但指定以NOWAIT方式获取资源,或者超时失效===
aili6206
·
2024-09-08 17:09
数据库
Apple再次推迟折叠设备
Folda
ble
phoneshavebeendevelopingrapidlyinthelastfiveyearsandsomemanufacturersareevenexperimentingwithlargerformfactorslikelaptopswhileotherslikeApplehaveyettodiptheirtoesinthefolda
ble
market.There
S0linteeH
·
2024-09-08 17:08
apple
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