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BLE(低功耗)蓝牙开发
Qt 表格控件ta
ble
Widget的使用(1)
目录前言:内容:1.界面2.代码参考:前言:学习表格控件ta
ble
Widget的学习记录1,主要是用代码实现表格本身的设计(上篇)内容:1.界面ui文件添加ta
ble
Widget控件,想要名字的话另外用
都是报错快CV吧
·
2024-02-19 10:32
QT学习记录与资源提供
qt
开发语言
ui
visualstudio
20.Qt 表格控件ta
ble
Widget的使用(2)-单元格操作
讲解时讲解了很多基本函数,非常实用之前的内容可以看上一篇内容->20.Qt表格控件ta
ble
Widget的使用(1)技能:对于ta
ble
widget中单元行的更详细的操作,具体看参考链接,讲的很好很详细内容
都是报错快CV吧
·
2024-02-19 10:32
QT学习记录与资源提供
qt
开发语言
ui
visualstudio
可观测集合 Observa
ble
Collection<T>、BindingList<T>
这时我们就需要使用可被观测的集合Observa
ble
Collection、BindingList1、Observa
ble
Collection一个动态数据集合,该集合在添加或删除项或刷新整个列表时提供通知
James.TCG
·
2024-02-19 10:27
WPF
wpf
Flink和Kafka端到端数据一致性
Flink内部把Checkpoint开启,设置Checkpoint模式为EXACTLY_ONCEenv.ena
ble
Checkpointing(1000*10L);env.getCheckpointConfig
今天好好洗头了嘛
·
2024-02-19 10:19
Flink
kafka
flink
分布式
Flutter 中 Dragga
ble
Scrolla
ble
Sheet 的属性介绍与使用
在Flutter中,Dragga
ble
Scrolla
ble
Sheet是一个非常有用的小部件,它允许用户通过手势来拖动一个可滚动的区域,通常被用作底部弹出式面板或者随手势拖动的控件。
Zender Han
·
2024-02-19 10:19
Flutter知识学习指南
flutter
android
ios
【C++】32 初探C++标准库 operator 关键字 C语言兼容库 cout cin
\n");char*p=(char*)malloc(16);strcpy(p,"D.T.Software");printf("%s\n",p);dou
ble
·
2024-02-19 10:17
c++
COMP26120 Lab Exercise 5: The 0/1 Knapsack Pro
ble
m
IntroductionInthissectionweintroducethe‘0/1Knapsack’pro
ble
m.The0/1KnapsackPro
ble
mandLogisticsSupposeanairlinecargocompanyhas1aeroplanewhichitfliesfromtheUKtotheUSonadailybasistotransportsomecargo.Inad
·
2024-02-19 10:12
java
CS 532 DLT algorithm
59PMDepartmentofComputerScienceStevensInstituteofTechnologyCollaborationPolicy.Homeworksmaybedoneindividuallyorinteamsoftwo.Itisaccepta
ble
forstudentsofdiffe
areyousure7
·
2024-02-19 10:35
开发语言
cs400 A03.FirstGi
FirstGitThisactivityisdesignedtogiveyoupracticeworkingwithasinglebranchwithinalocalGitrepository.Bytheendofthisactivity,youshouldbea
ble
tobothinspectthehistoryofpastversionswithinasinglebranch
areyousure7
·
2024-02-19 10:05
开发语言
ECE438: Communication Networks
ECE438:CommunicationNetworksFall2023MachinePro
ble
m2AbstractThismachinepro
ble
mtestsyourunderstandingofrelia
ble
packettransfer.YouwilluseUDPtoimplementyourownversionofTCP.Yourimplementationmustbea
ble
toto
areyousure7
·
2024-02-19 10:34
单片机
嵌入式硬件
go-zero读取mysql部分字段
假设有如下一张表:CREATETA
BLE
test(idINTUNSIGNEDNOTNULLAUTO_INCREMENTPRIMARYKEY,ctimeDATETIME);要读取字段ctime值。
一见
·
2024-02-19 10:58
go-zero
go
go-zero
聊聊arthas的spring-boot-starter
java/com/alibaba/arthas/spring/ArthasConfiguration.java@ConditionalOnProperty(name="spring.arthas.ena
ble
d
·
2024-02-19 10:22
arthas
vuecli4里面使用rem
1、安装两个插件屏幕自适应插件npmiamfe-flexi
ble
--save把px转成rem的插件只能在css文件里面写里面的npmipostcss-px2rem--save2、main.js引入importremfrom'amfe-flexi
ble
'Vue.use
前端Z老师
·
2024-02-15 10:14
SAP MM学习笔记 - (TODO)错误 ME154 - Not possi
ble
to determine any components(无法确定SAP的任何组件)
ME154-Notpossi
ble
todetermineanycomponents(无法确定SAP的任何组件)TODO:就是暂时还没搞定,知道的朋友请在下面留言,谢谢。
东京老树根
·
2024-02-15 10:10
SAP学习笔记
SAP
MM
学习
笔记
拖延症的根源是不清晰要做什么
以后每一周都要做反思,这段时间其实一直在处理运营的事情,但是进度推动的特别慢,今天恰巧卡在了项目经历的介绍上,于是询问了做猎头的志平,他推荐了SMART法则,即Specific(具体的),Measura
ble
苏格拉磊
·
2024-02-15 10:05
Vue3之ElementPlus中Ta
ble
选中数据的获取与清空方法
Vue3之ElementPlus中Ta
ble
选中数据的获取与清空方法文章目录Vue3之ElementPlus中Ta
ble
选中数据的获取与清空方法1.点击按钮获取与清空选中表格的数据1.用到ElementPlus
小袁搬码
·
2024-02-15 10:38
vue3
vue
vue.js
前端
Vue3
Eement-plus
Java基础-异常与多线程
一.异常1.基础概念异常抛出机制:出现异常,创建异常类型的对象,抛出以捕获;异常的根父类:throwa
ble
-两个子类:exception(编程错误等)和error(jvm无法解决严重问题,eg:堆,栈内存溢出
tmy99
·
2024-02-15 10:04
java
前端
数据结构
MySQL基础(二)——学习笔记
一.MySQL存储引擎1.体系结构从上至下:连接-服务-引擎(包括索引)-存储层2.存储引擎(mysql默认innodb)#建表时指定存储引擎CREATETA
BLE
表名(字段1字段1类型[COMMENT
tmy99
·
2024-02-15 10:33
mysql
学习
笔记
九齐NY8BE62D软件开发
开启100us中断voidTime_Init(void){DISI();//;InitialTimer0PCON1=C_TMR0_Dis;//Disa
ble
Timer0TMR0=100;//Load0x00toTMR0
wiyoo0
·
2024-02-15 10:02
单片机
嵌入式硬件
【雕爷学编程】MicroPython手册之麦哲伦 STM32H743 延时和计时
与常规Python相比,MicroPython解释器体积小(仅100KB左右),通过编译成二进制Executa
ble
文件运行,执行效率较高。
驴友花雕
·
2024-02-15 10:01
MicroPython手册
stm32
嵌入式硬件
单片机
python
麦哲伦
STM32H743
延时和计时
MicroPython
pwna
ble
.kr解题write up —— Toddler's Bottle(一)
1.fd#include#includecharbuf[32];intmain(intargc,char*argv[],char*envp[]){if(argcunsignedlonghashcode=0x21DD09EC;unsignedlongcheck_password(constchar*p){int*ip=(int*)p;inti;intres=0;for(i=0;i#includevo
captain_hwz
·
2024-02-15 10:30
security
CTF
security
pwna
ble
.kr解题write up —— Toddler's Bottle(二)
9.mistake#include#include#definePW_LEN10#defineXORKEY1voidxor(char*s,intlen){inti;for(i=0;i0)){printf("readerror\n");close(fd);return0;}charpw_buf2[PW_LEN+1];printf("inputpassword:");scanf("%10s",pw_b
captain_hwz
·
2024-02-15 10:00
security
CTF
security
Hive的相关概念——架构、数据存储、读写文件机制
目录一、架构及组件介绍1.1Hive整体架构1.2Hive组件1.3Hive数据模型(DataModel)1.3.1Databases1.3.2Ta
ble
s1.3.3Partitions1.3.4Buckets
爱吃辣条byte
·
2024-02-15 10:57
#
Hive
hive
数据仓库
A
ble
ton Live 连接 Arduino 教程
你有没有想过,用Arduino做一个简单的MIDIcontroller,控制A
ble
tonLive中的参数?
Kidult
·
2024-02-15 10:51
Android资源文件命名与使用
layout以module_activity开头ListView、RecyclerView、GridView的itemlayout以module_list/recycler/grid_item开头2.drawa
ble
丁功春
·
2024-02-15 10:12
【数据结构】哈希桶封装出map和set
map是一个k-v类型,set是k类型,那么就明确了如果需要封装,底层的ta
ble
s必须能接收K-T类型。
深度搜索
·
2024-02-15 10:20
数据结构
哈希算法
封装
bitCode的问题
PolymerPay/Library/mobStat/libSDK.a(**ForSDK.o)’doesnotcontainbitcode.Youmustrebuilditwithbitcodeena
ble
d
guoguojianshu
·
2024-02-15 10:42
面试官:介绍一下Exception和Error之间的区别
主体在Java编程中,Exception和Error都是Java中的可抛出对象,它们都是Throwa
ble
类的子类,但在使用和处理上有着不同的特点。
Chowley
·
2024-02-15 09:09
QALog
word
String
保留位数dou
ble
value=newBigDecimal(tatol).setScale(2,BigDecimal.ROUND_HALF_UP).dou
ble
Value();分割字符串Stringa=
Xr丶_c967
·
2024-02-15 09:00
【日更挑战】2022-12-23比赛日NOTES
比赛日,官网给出每场比赛的Notes(极个别场次没有),翻译如下Flyers(3)vs.MapleLeafs(4)Samonov追平BruceGam
ble
(1967年10月25日-1968年1月20日)
扁圆柱体
·
2024-02-15 09:16
2019-10-30 sql-update语句多表级联更新
可能会出现一种情况,就是更新的内容是来源于其他表的,这个时候,update语句中就加了from,下面为一个范例:1updateaseta.name=b.name,a.value=b.valuefromta
ble
1a
我的的昵称已被使用换一个吧
·
2024-02-15 09:43
armadillo matlab,Armadillo之计算矩阵的行列式(determinant)
计算矩阵的行列式很简单,用det方法或是log_det方法1det(A)如果A不是方阵的(square),将抛出std::logic_error异常例:matm="3,2,4;1,-2,3;2,3,2;";dou
ble
d
三七二十
·
2024-02-15 09:07
armadillo
matlab
基于C#编程建立泛型Matrix数据类型及对应处理方法
一、简介上一篇文档中描述了如何写一个Vector类,本次在上一篇文档基础上,撰写本文,介绍如何书写一个泛型Matrix,可以应用于int、dou
ble
、float等C#数值型的matrix。
心网千结
·
2024-02-15 09:07
C#
c#
开发语言
Matrix
泛型
C#实现矩阵计算
classMatrix{publicMatrix(dou
ble
[,]matrix){introws=matrix.GetLength(0);intlines=matrix.GetLength(1);Element
湫秋刀鱼
·
2024-02-15 09:36
c#
矩阵
算法
Divisi
ble
Pairs (Java)
CodeforcesRound925(Div.3)D.Divisi
ble
Pairs(Java)比赛链接:CodeforcesRound925(Div.3)D题传送门:D.Divisi
ble
Pairs题目
Keven__Java
·
2024-02-15 09:02
算法题
java
开发语言
算法
eclipse
idea
洛谷 P1102 A-B 数对 (Java)
相同的题目看多了也会有审美疲劳,于是我舍弃了大家所熟悉的A+BPro
ble
m,改用A-B了哈哈!
Keven__Java
·
2024-02-15 09:01
算法题
java
算法
数据结构
ide
开发语言
ELADMIN 部署到 docker 容器
Dockercurl-fsSLhttps://get.docker.com|bash-sdocker--mirrorAliyun&&systemctlstartdocker&&systemctlena
ble
docker
God__is__a__girl
·
2024-02-15 09:28
docker
java-ee
java
MATLAB|基于改进二进制粒子群算法的含需求响应机组组合问题研究(含文献和源码)
目录主要内容模型研究1.改进二进制粒子群算法(BPSO)2.模型分析结果一览下载链接主要内容该程序复现《AModifiedBinaryPSOtosolvetheThermalUnitCommitmentPro
ble
m
科研工作站
·
2024-02-15 09:25
机组组合
改进二进制粒子群
PSO
BPSO
机组组合
燃料成本
复现
删除sqlite3数据库文件
update等等,那在数据库文件被删除后,调用这些接口会有什么效果呢,所以做了一个小测试测试内容1.初始化数据库,打开数据库文件2.删除数据库文件3.调用select,update接口查看效果测试的数据库的ta
ble
edenliuL
·
2024-02-15 09:21
Sqlite
数据库
sqlite
sql
postgresql 数据库的自增量从 SERIAL 修改为 SERIAL8
在一次数据对接时,发现自增量主键居然用了SERIAL,再跑一段时间这张表肯定要爆了~现在想调整为SERIAL8,初始的想法直接修改字段类型:alterta
ble
tab_namealtercolumndata_idtypeSERIAL8
kampoo
·
2024-02-15 09:18
SQL
postgresql
C++ 多线程学习(3) ---- 条件变量
1.条件变量简介在C++11中,我们可以使用条件变量(conditionvaria
ble
)实现多个线程之间的同步操作,当条件不满足时,相关线程一直被阻塞,直到某种条件成立,这些线程才会被唤醒。
小猪佩奇TONY
·
2024-02-15 09:42
c++
OpenGL-ES 学习(1)---- Alpha
Ble
nd
Alpha
Ble
ndOpenGL-ES混合本质上是将2个片元的颜色进行调和(一般是求和操作),产生一个新的颜色OpenGLES混合发生在片元通过各项测试之后,准备进入帧缓冲区的片元和原有的片元按照特定比例加权计算出最终片元的颜色值
小猪佩奇TONY
·
2024-02-15 09:42
OpenGL-ES
es
开源
浅谈redis缓存及缓存雪崩的处理
目录前言代码分析第一种代码案例:第二种方案,加锁第三种方案:semaphore实现共享锁第四种方案:基于DCL(Dou
ble
CheckLock)模式,结合Semaphore,再次进一步对代码进行优化。
白不懂黑的静
·
2024-02-15 08:08
Redis
spingboot
redis
缓存
别人卖了 2W 的一套 ChatGPT 自动身份提示词!
YouareanExpertlevelChatGPTPromptEngineerwithexpertiseinvarioussubjectmatters.Throughoutourinteraction,youwillrefertomeas(yourname).Let'scollaboratetocreatethebestpossi
ble
Cha
sinat_30139251
·
2024-02-15 08:08
chatgpt
浅谈项目的缓存使用
Spring缓存@Cachea
ble
方法,关于用法,网上已经有很多这样的例子,这里不展开了,主要要注意Springboot1.x与2.x的调用区别、统一命名格式的定义、默认使用JDK序列化还是JSON序列化
u013323965
·
2024-02-15 08:08
Java
Web
Cache
缓存
关于今天遇到的两个bug
Bug1:Causedby:java.lang.reflect.Inaccessi
ble
ObjectException:Una
ble
tomakeprotectedfinaljava.lang.Classjava.lang.ClassLoader.defineClass
꧁L10꧂
·
2024-02-15 08:02
Bug
bug
java
Una
ble
to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,b
异常信息提示:org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname'globalTransactionScanner'definedinclasspathresource[io/seata/spring/boot/autoconfigure/SeataAutoConfiguration.c
醉梦依依惜(互粉互赞)
·
2024-02-15 08:01
异常系列
java
开发语言
异常
异常系列
seata错误
关于报错java.lang.reflect.Inaccessi
ble
ObjectException: Una
ble
to make field private java.util.concurrent
java.lang.reflect.Inaccessi
ble
ObjectException:Una
ble
tomakefieldprivatejava.util.concurrent.Calla
ble
java.util.concurrent.FutureTask.calla
ble
accessi
ble
m0_60198984
·
2024-02-15 08:31
java
jvm
Caused by: java.lang.reflect.Inaccessi
ble
ObjectException: Una
ble
to make protected final java.lang.
由于jdk版本引起的,至于其他博主讲的解决办法我找个新手小白也不太会弄,直接再下载一个低版本的jdk,不用去官网下载,idea里面就可以第一步ProjectStructure第二步:第三步:第四步:就可以成功下载了!!!!!
啊哈!!…
·
2024-02-15 08:30
java
jvm
开发语言
Caused by: java.lang.reflect.Inaccessi
ble
ObjectException: Una
ble
to make protected final java.lang.C
最近在学习JDK17的时候遇到这么一个问题,springBoot启动失败,日志如下:Exceptioninthread"main"java.lang.IllegalArgumentException:Una
ble
toinstantiatefactoryclass
Zhaozz!
·
2024-02-15 08:00
java
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