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BLE(低功耗)蓝牙开发
Spark通过jdbc性能调优--采用分区的方式从oracle读数据
的问题调优常规的读取数据库的方式如下ods_bdz=spark.read.format(“jdbc”).option(“url”,“jdbc:oracle:thin:@”+dbstring).option(“dbta
ble
korry24
·
2024-02-14 18:08
oracle
spark
mysql
java 深度拷贝
publicstaticObjectcopy(Serializa
ble
oldObj){Objectobj=null;try{//WritetheobjectouttoabytearrayByteArrayOutputStreambos
sspa
·
2024-02-14 17:14
Fatal error in launcher: Una
ble
to create process using '"
确认python.exe存在,确认python.exe被你改成了pyython3.exe改回来就ok
吉凶以情迁
·
2024-02-14 17:08
Makefile常用语法
举例:ifeq($(CONFIG_DEBUG_SYMBOLS),y)ARCH_DEBUG+=-g3$(infoDebugsymbolsena
ble
d:AR
丨东隅已逝丨
·
2024-02-14 17:35
linux
基于STM32通过RTC唤醒
低功耗
模式
一、
低功耗
模式1.简介通俗的来讲
低功耗
模式就是降低单片机的运行功耗STM32F10xxx有三种
低功耗
模式:(1)睡眠模式(Cortex™-M3内核停止,所有外设包括Cortex-M3核心的外设,如NVIC
丨东隅已逝丨
·
2024-02-14 17:04
STM32相关
stm32
单片机
arm
html显示script变量,javascript - html如何获得script中的变量值
javascript-html如何获得script中的变量值世界只因有你2017-05-1810:57:1302240xxxxxfunctiontestResult(){vartestVaria
ble
百面书生爱写撕
·
2024-02-14 17:31
html显示script变量
从行动开始
M=Measured(可测评)O=Observa
ble
(可观察)R=Relia
341_7020
·
2024-02-14 17:59
自定义vue指令,实现el-tooltip仅在文字溢出时显示,文字未溢出则不显示,复制即可使用
一、写在开头在项目里遇到了这种需求,想到el-ta
ble
里的show-overflow-tooltip属性就有这种效果,在参考了一些网上的文章以及show-overflow-tooltip跟el-tooltip
千叶KE
·
2024-02-14 17:57
vue.js
javascript
前端
elementui
Enum使用实践
1.用于处理常量,增强代码可读性Enum类**Constant//使用ta
ble
Name映射IdNamepublicenum**Constant{//成员常量CH_ADMIN_GELP_FAQ("F_ID
qianbihua00
·
2024-02-14 17:26
java
【无标题】
Vite+Vue项目,运行vite中文网(开始|Vite官方中文文档)#npm6.xnpmcreatevite@latestmy-vue-app--templatevue#npm7+,extradou
ble
-dashisneeded
miss-ddly
·
2024-02-14 17:24
vue.js
javascript
前端
修改ta
ble
HeaderView和ta
ble
FooterView的高度
需要关注两个方面,一个是ta
ble
HeaderView属性指向的那个view本身的高度,另一个是ta
ble
view的contentSizeta
ble
HeaderView的高度可以用frame设置也可以用
Trigger_o
·
2024-02-14 17:05
数据库实验报告
用SQL语句和企业管理器建立如下的表结构并输入数据给定表结构如下:创建数据库创建数据库createta
ble
student(Snointauto_incrementprimarykey,Snamevarchar
青城小虫
·
2024-02-14 17:19
mysql
数据库
数据库
sql
mysql
Java学习-常用API(一)
自动装箱和自动拆箱:常用方法:注意:字符串的数值,注意是数值,“20A”就不行;“13.5”不能转换为Integer类型,可以转换为Dou
ble
的;
希望奇迹很安静
·
2024-02-14 17:15
学习
五、Mybatis复杂映射开发
1.一对一查询1.1一对一查询的模型用户表和订单表的关系为,一个用户有多个订单,一个订单只从属于一个用户一对一查询的需求:查询一个订单,与此同时查询出该订单所属的用户SQL:DROPTA
BLE
IFEXISTS
Cookie__C
·
2024-02-14 17:39
mybatis
mybatis
sql
嵌入式系统降
低功耗
的设计技术
近年来许多公司相继推出一系列功能齐全、种类繁多的
低功耗
器件,具有种类更多、功耗更低、体积更小、使用方便等特点。电路的设计与元件的选取是同时或交叉进行的。
不脱发的程序猿
·
2024-02-14 17:35
Task04:数据完整存储与内存的数据集类+结点预测与边预测任务实践
classInMemoryDataset(root:Optional[str]=None,transform:Optional[Calla
ble
]=None,pre_transform:Optional
cherry_7
·
2024-02-14 17:02
若依关闭验证码功能和实例演示功能
若依登录关闭验证码功能修改application.yml1.关闭验证码开关#验证码开关shiro:captchaEna
ble
d:false2.关闭页面右侧实例演示菜单ruoyi:#实例演示开关demoEna
ble
d
博文樱花
·
2024-02-14 17:06
java
iOS ta
ble
viewcell 上UItextfield 设置输入长度和最大值
最近有做到一个功能,在UItextfield设置输入长度和最大值。先添加UItextfield代理,再添加代理方法如下:-(BOOL)textField:(UITextField*)textFieldshouldChangeCharactersInRange:(NSRange)rangereplacementString:(NSString*)string{NSString*newString=[
New_卡迪熊
·
2024-02-14 17:16
豆瓣治愈话题:热爱生活的一万个理由
――网易云热评《dreamispossi
ble
》@Sissis:周末在市场买了几个阳山水蜜桃,今天的软度刚刚好。扒开桃子跟小朋友坐在飘窗上一起吃。爱生活的
超职心理学
·
2024-02-14 17:18
Why haven’t bitcoin become a common payment option?
Astherepresentativeofdigitalcurrencies,bitcoinvalueanditsmarketcapwasunsta
ble
inrecentyears.Meanwhile,
aboutcryptocurrency
·
2024-02-14 16:55
cryptocurrency
bitcoin
java数据结构与算法刷题-----LeetCode151. 反转字符串中的单词
blog.csdn.net/grd_java/article/details/123063846解题思路这道题,可以理解为,将字符串颠倒,但是每个单词原来的顺序是什么还是什么,不能改变单词的组合顺序,比如apple,a
ble
殷丿grd_志鹏
·
2024-02-14 16:24
算法
java
算法
leetcode
囊括市场百分之九十五的经典英语绘本资料合集
Earlyreading网的decoda
ble
_bookshttps://pan.baidu.com/s/1meikH1JJFSbj_6kOc7Ff1Q:9nc6Readingteacher网的Sam_Bookshttps
成长陪练
·
2024-02-14 16:06
自定义事件
//创建自定义事件varevt=newwindow.CustomEvent('haha',{bub
ble
s:true,//是否可冒泡cancela
ble
:true,//是否可取消detail:'msg'
卡农me
·
2024-02-14 16:51
C#利用NPOI导出参数
掌握C#Winform使用NPOI导入、导出Excel掌握条件语句掌握循环语句代码如下:`publicstaticvoidExportDataToExcel(DataTa
ble
Ta
ble
Name){stringFileName
兔然生痣
·
2024-02-14 16:20
c#
java
开发语言
C#NPOI获取Excel的DataTa
ble
第一种:通过表名获取//////从Excel中获取Datata
ble
//////路径///表下标///从第几行开始(表头行)///publicstaticDataTa
ble
GetDataTa
ble
(stringpath
mouka~
·
2024-02-14 16:19
Word
Excel
TXT
XML
C# winform如何对excel文件进行导入导出——NPOI文件
5.在导入按钮中书写代码DataTa
ble
Ta
ble
(){Data
青云出岫_Ai60020
·
2024-02-14 16:18
c#
开发语言
后端
如何使用KVO对NSMuta
ble
Array进行监听
[NSObjectmuta
ble
ArrayValueForKey:]通过上面的方法获取到muta
ble
Array并进行操作则可以对数组进行监听@property(nonatomic,strong)NSMuta
ble
Array
___1o_8o
·
2024-02-14 16:44
【每日英语听力】20180808 励志英语美文精华 “更好的明天”
ABetterTomorrowPeopleoftenwonderwhyhistoriansgotosomuchtrou
ble
topreservemillionsofbooks,documentsandrecords
般若星星灿的垚淼
·
2024-02-14 16:56
PIPI:1008: 最大连续子序列暴力求解和动态规划求解(Java)
intvalue;@OverridepublicStringtoString(){return"from="+from+"\tto="+to+"\tvalue="+value;}//实现Compara
ble
天降小纸箱
·
2024-02-14 16:28
IOS Technical Support
Hi,Ifyouhaveanyquestions,youcansendamessagehereorsendthemtous.Wewillansweryouassoonaspossi
ble
.email:521892895
Mercy_3942
·
2024-02-14 16:10
简单二叉树
importjava.util.Arrays;importjava.util.Random;importjava.util.Stack;publicclassBinaryTreeNode>implementsCompara
ble
秋若然
·
2024-02-14 16:39
【C++】模版初阶
voidSwap(int&left,int&right){inttemp=left;left=right;right=temp;}voidSwap(dou
ble
&left,dou
ble
&right){dou
ble
temp
核动力C++选手
·
2024-02-14 16:43
C++
c++
Java学习笔记------ArrayList(二)
byte------Byte、short------Shortchar------Character、int------Integelong------Long、float------Floatdou
ble
烟雨织轻愁
·
2024-02-14 16:41
java
学习
笔记
java实现多级目录树(递归实现)
数据库表设计以及数据内容(以部门举例)id主键parent_id父级部门iddepart_name部门名词sort部门排序三.实体类@DatapublicclassKunKunimplementsSerializa
ble
渔阳节度使
·
2024-02-14 15:38
实际工作
java
windows
开发语言
mysqldump备份
mysqldump位于..MySQL\MySQLServer5.5\下)1、将指定数据库备份到某dump文件(转储文件)中mysqldump-uroot-pPassword[databasename][ta
ble
name
天噵酉州懃_b1ba
·
2024-02-14 15:47
Java练习题(三)--信号报告
无线电台的RS制信号报告是由三两个部分组成的:R(Readability)信号可辨度即清晰度.S(Strength)信号强度即大小.其中R位于报告第一位,共分5级,用1—5数字表示.1---Unreada
ble
2
泽申
·
2024-02-14 15:38
UICollectionView使用
首先我们自定义一个UICollectionViewCell,和自定义UITa
ble
ViewCell差不多,只是这里定义的是一个网格。
搬砖行家
·
2024-02-14 15:27
Defining unique sequence abundances 信息搬运
global_trimming_and_abundance.htmlDefiningabundancewhensequencelengthvariesCalculatinguniquesequenceabundanceispro
ble
maticwhenreadsofthesametemplatesequencev
代号北极能
·
2024-02-14 15:49
谁不想拥有一辆大黄蜂呢,能跑能打还能卖萌
相信看到标题的人肯定就知道麻婆今天要推荐什么影片了,没错,就是前几天刚上映的这部——大黄蜂Bum
ble
bee这部电影是“变形金刚”宇宙的衍生电影,也是该系列的第六部电影。
麻婆电影
·
2024-02-14 15:48
R如何将表格作为注释添加到图形中
以下是示例代码:library(ggplot2)library(gridExtra)library(ka
ble
Extra)library(dplyr)#创建一个示例的ggplot图形plot1%ka
ble
R语言与SPSS学习笔记
·
2024-02-14 15:35
iOS 底层面试题
释放步骤1、C++函数释放:objc_cxxDestruct2、移除关联属性:_object_remove_assocations3、将弱引用自动设置nil:weak_clear_no_lock(&ta
ble
.weak_ta
ble
木扬音
·
2024-02-14 15:53
SDUTOJ3469_深度优先搜索练习之神奇的矩环(DFS)
深度优先搜索练习之神奇的矩环TimeLimit:1000msMemoryLimit:65536KiBSubmitStatisticPro
ble
mDescription小鑫的女朋友被魔王抢走了!
devhg_
·
2024-02-14 14:45
数据结构--
图的遍历DFS&BFS
[leetcode]741. Cherry Pickup
链接:https://leetcode.com/pro
ble
ms/cherry-pickup/description/InaNxNgridrepresentingafieldofcherries,eachcellisoneofthreepossi
ble
integers
xiaocong1990
·
2024-02-14 14:44
leetcode
动态规划
[LeetCode] 741. Cherry Pickup 捡樱桃
InaNxNgridrepresentingafieldofcherries,eachcellisoneofthreepossi
ble
integers.0meansthecellisempty,soyoucanpassthrough
weixin_30433075
·
2024-02-14 14:14
数据结构与算法
python
java
[LeetCode] 741. Cherry Pickup
Pro
ble
mInaNxNgridrepresentingafieldofcherries,eachcellisoneofthreepossi
ble
integers.0meansthecellisempty
weixin_34226706
·
2024-02-14 14:14
【Leetcode】741. Cherry Pickup
题目地址:https://leetcode.com/pro
ble
ms/cherry-pickup/给定一个正方形矩阵,里面的数都是000、111或者−1-1−1,111代表有樱桃,000代表空地,可以走过去
记录算法题解
·
2024-02-14 14:43
LC
贪心
动态规划与记忆化搜索
算法
动态规划
leetcode
c++
【Leetcode】1463. Cherry Pickup II
题目地址:https://leetcode.com/pro
ble
ms/cherry-pickup-ii/给定一个二维矩阵AAA,元素非负。
记录算法题解
·
2024-02-14 14:43
LC
贪心
动态规划与记忆化搜索
动态规划
算法
leetcode
java
数据结构
[Leetcode] 741. Cherry Pickup 解题报告
题目:InaNxNgridrepresentingafieldofcherries,eachcellisoneofthreepossi
ble
integers.0meansthecellisempty,soyoucanpassthrough
魔豆Magicbean
·
2024-02-14 14:13
IT公司面试习题
Leetcode
解题报告
Dynamic
Programming
LeetCode741. Cherry Pickup
https://leetcode.com/pro
ble
ms/cherry-pickup/description/InaNxNgridrepresentingafieldofcherries,eachcellisoneofthreepossi
ble
integers
dbvz4901
·
2024-02-14 14:12
数据结构与算法
LeetCode 741. Cherry Pickup
一、题目描述InaNxNgridrepresentingafieldofcherries,eachcellisoneofthreepossi
ble
integers.0meansthecellisempty
AzureoSky
·
2024-02-14 14:42
LeetCode
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