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ble蓝牙芯片
Python | TypeError: ‘NoneType’ object is not itera
ble
Python|TypeError:‘NoneType’objectisnotitera
ble
在Python编程中,TypeError:'NoneType'objectisnotitera
ble
是一个常见的错误
二川bro
·
2024-08-22 09:18
优化
bug集合
python
python
开发语言
Lua自己实现string.split功能
string.len(str)--长度localstart=1whilestart<=ndolocali=string.find(str,d,start)--find'next'0ifi==nilthenta
ble
.insert
heyuchang666
·
2024-08-22 08:14
Lua开发
Lua语言开发
string.split
Unit5复盘
Part11,从本单元中我学到的最重要的理念(精读和视听说分别总结)精读:Animalsaresuchagreea
ble
friends,weshouldpeacewithanimals.Animalshavepeoplecan'timaginesintelligence
人文2班赵薇
·
2024-08-22 08:27
Una
ble
to evaluate expression using this context
Una
ble
toevaluateexpressionusingthiscontextJAVA语言使用Xpath解析XML格式字符串publicStringxmlText(Stringxml){Documentdoc
java丶小虫
·
2024-08-22 08:43
java
Xpath
XML
C++匿名函数lamba简介
二、基本语法[捕获列表](参数列表)muta
ble
(可选)异常属性->返回类型(可省略){//函数体}返回类型可自动推导
不适合写代码的程序员
·
2024-08-22 07:38
c++
匿名函数
lambda
C++11
新特性
阿里云计算巢:开启全新云服务时代,助力企业飞速成长
其中,计算巢的Sta
ble
DiffusionWebUI和aiacctorch服务能够大幅度提升PyTorch的推理性能,为AI应用提供强大的加速能力。
阿里云最新优惠和活动汇总
·
2024-08-22 07:47
C++-----计算三角形面积
#include#includeusingnamespacestd;classPoint{//坐标点类public:constdou
ble
x,y;Point(dou
ble
x=0.0,dou
ble
y=0.0
navi’s electronic
·
2024-08-22 07:04
C++
c++
算法
开发语言
代码随想录算法训练营day6|哈希表part1
第二种就是要求ta
ble
Size大于dataSize的时候,哈希表可以将冲突
翼1001
·
2024-08-22 06:03
散列表
哈希算法
数据结构
goland控制台显示重叠问题解决方案
解决方法:PleasenavigatetoHelp|FindAction,typeRegistry...,findoptionanddisa
ble
it.Doesithelp?
keep_top
·
2024-08-22 06:31
go语言
go
力扣面试经典算法150题:跳跃游戏
题目链接:https://leetcode.cn/pro
ble
ms/jump-game/description/?
明月望秋思
·
2024-08-22 05:54
学习
Java
算法
算法
leetcode
面试
java
Apache Paimon:实时湖仓架构构建工具
ApachePaimon:实时湖仓架构构建工具paimonApachePaimonisalakeformatthatena
ble
sbuildingaRealtimeLakehouseArchitecturewithFlinkandSparkforbothstreamingandbatchoperations
乔如黎
·
2024-08-22 03:15
python之os.walk()
followlinks=False)输入参数:top:所需遍历目录的路径topdown:True时,则优先遍历top目录,否则优先遍历top的子目录(默认为True)onerror:需要一个calla
ble
xwq-csdn
·
2024-08-22 03:43
python
Python
os
walk
复盘一单元
(精读和视听说分别总结)精读:把握文章的整体结构视听说:听力完成后要做听后复述2,我在本片文章/音频/视频中学到的怦然心动的单词(精读和视听说分别总结)1)精读:drive干劲ease减轻invisi
ble
教育学一班杨朔34
·
2024-08-22 03:34
探索实时湖仓架构的新星:Apache Paimon
探索实时湖仓架构的新星:ApachePaimonpaimonApachePaimonisalakeformatthatena
ble
sbuildingaRealtimeLakehouseArchitecturewithFlinkandSparkforbothstreamingandbatchoperations
幸愉旎Jasper
·
2024-08-22 03:39
MySQL自增主键
1在创建表时指定自增主键:CREATETA
BLE
表名(列名数据类型AUTO_INCREMENTPRIMARYKEY,列名数据类型,...)
中台小A
·
2024-08-22 02:07
mysql
mysql
sql
数据库
python 面试指南
Ta
ble
ofContentsPython语言特性1Python的函数参数传递2Python中的元类(metaclass)3@staticmethod和@classmethod4类变量和实例变量5Python
墨痕_777
·
2024-08-22 02:32
python
Linux~MySQL数据库具体操作
一、数据库的字符集编码设置(一)查看数据库默认的字符集MariaDB[(none)]>showvaria
ble
slike'%character%';+--------------------------
linuxMinx
·
2024-08-22 01:30
数据库
64. 最小路径和(python3)
题目:https://leetcode-cn.com/pro
ble
ms/minimum-path-sum/给定一个包含非负整数的mxn网格grid,请找出一条从左上角到右下角的路径,使得路径上的数字总和为最小
keep moving 123
·
2024-08-22 01:29
leetcode
medium
DP
leetcode
Python 核心概念解析:可迭代对象、迭代器、生成器和装饰器
在Python编程世界中,有四个非常核心的概念:可迭代对象(Itera
ble
)、迭代器(Iterator)、生成器(Generator)和装饰器(Decorator)。
书生有只狗᭄゛ঞ
·
2024-08-22 01:58
python爬虫
python
开发语言
log4j与logback(简介,配置项解释,配置示例,使用说明)
文章目录共性配置项含义指定配置文件常用实践注意事项log.isDebugEna
ble
d()开发时使用带作者名的日志代码合并到master之前检查日志附录logj.properties写法logback.xml
rookie19_
·
2024-08-22 00:22
java
log4j
logback
Sql多表查询大全
*FROMTa
ble
AAINNERJOINTa
ble
BBONA.id=B.id;```###2.左连接(LEFTJOIN)左连接返回左表中的所有记录,即使右表中没有匹配的记录
梨园猫
·
2024-08-21 23:50
sql
数据库
青少年编程
python
java
AI绘画Sta
ble
Diffusion(SD)常用插件
常用的AI绘画Sta
ble
Diffusion(SD)软件插件有很多,可以帮助用户提升创作效率和作品质量。以下是一些常见的插件和扩展:1.
梨园猫
·
2024-08-21 23:49
AI作画
人工智能
青少年编程
Java中的单例模式
在Java中,实现线程安全的单例模式通常有几种方法:懒汉式(LazyInitialization)双重检查锁定(Dou
ble
-CheckedLocking):这是一种常见的实现方式,通过双重检查
士伟丷
·
2024-08-21 23:49
设计模式
java
单例模式
c#相关基础知识
的正常数据的传输ref:对参数的指向是参数本身的地址,而不是数据的副本,所以可以对数据进行直接操作out:绑定控件,控件传输值赋值给类中的内部类winform:窗体的关闭与否:privatevoidLa
ble
1
起鸣
·
2024-08-21 23:46
c#
使用ViewPager2切换Fragment后返回闪退
(一)具体报错androidx.fragment.app.Fragment$InstantiationException:Una
ble
toinstantiatefragmentcom.yl.newtaobaounion.ui.fragment.HomeViewPagerFragment
le161616
·
2024-08-21 22:38
Android调试报错记录
android
kotlin
学会辨识「漏洞炒作」你就比别人强!
昨天,最受欢迎的开源轻量级Java框架Spring被曝存在高危的RCE(远程控制设备)零日漏洞,北京大学计算中心、外媒praetorian、
ble
epingcomputer等站点对该漏洞进行了报道。
强哥叨逼叨
·
2024-08-21 22:49
1-38 Consistent Noun Stress in Changing Verb Tenses
Whenyoudotheexercisethefirsttime,gothroughstressingonlythenounsDogseatbones.Practicethisuntilyouarequitecomforta
ble
withtheintonation.Thepronunciationandwordconnectionsareontheright
柚子葉
·
2024-08-21 21:33
opencv日常学习之approxPolyDP函数和boundingRect函数说明
approxPolyDP来对指定的点集进行逼近,其逼近的精度是可设置的对应的函数为:voidapproxPolyDP(InputArraycurve,OutputArrayapproxCurve,dou
ble
epsilon
adsdriver
·
2024-08-21 20:55
Opencv学习点滴
opencv
日常学习
approxPoly
boundingRe
Mojo dict字典详解及接口相关说明
关键元素必须实现KeyElement该特征,其中包括Mova
ble
、Hasha
ble
和EqualityComp
启航学途
·
2024-08-21 20:24
Mojo
mojo
Mojo
dict字典详解
Mojo
dict接口相关说明
Mojo入门
mojo教程
mojo基础教程
mojo入门教程
Android系统和开发--安全性和权限管理 SELinux 策略 安全架构
/setenforce0adbrootsufastbootoemat-unlock-vbootadbdisa
ble
-verityAndroid权限Android系统是基于Linux内核构建的,因此它继承了
小黄人软件
·
2024-08-21 19:23
android
安全架构
安全
Vue项目-Ta
ble
添加Form表单校验
一、HTML新增表格数据{{row.name}}{{row.age}}{{row.sex}}删除任务信息生成二、JS//------------------->-------------------import{ref,reactive,onMounted,nextTick}from"vue";import{ElMessage}from"element-plus";//--------------
呆呆的小草
·
2024-08-21 19:21
Vue
vue.js
elementui
javascript
【转】-Java并发编程:阻塞队列
Java并发编程:阻塞队列该博客转载自**Matrix海子的Java并发编程:阻塞队列**Java并发编程:阻塞队列在前面几篇文章中,我们讨论了同步容器(Hashta
ble
、Vector),也讨论了并发容器
booleandev
·
2024-08-21 19:19
JUC
Java
转载
实战Java高并发程序设计笔记第三章
重入锁可以完全替代synchronized,使用java.util.concurrent.locks.ReentrantLock类来实现publicclassReenterLockimplementsRunna
ble
MisterDo
·
2024-08-21 18:51
linux基础命令(一)
Linux基础命令1、设置主机名1.1、hostname查看主机名[root@ansi
ble
~]#cat/etc/hostnameansi
ble
或[root@ansi
ble
~]#hostnameansi
ble
运维搬运工
·
2024-03-29 08:12
linux
linux
服务器
centos
第一次用eclipse,导入项目错误Plug-in “org.eclipse.m2e.editor“ was una
ble
to instantiate MavenPomEditor
第一次用eclipse,导入项目错误Plug-in"org.eclipse.m2e.editor"wasuna
ble
toinstantiateMavenPomEditor。
zhangfeng1133
·
2024-03-29 05:37
eclipse
java
ide
检测usb口HotPlug-netlink
SELinux,Linux系统的防火墙分为内核态的netfilter和用户态的ipta
ble
s,netfilter与ipta
ble
s的数据交换就是通过Netlink机制完成。
cany1000
·
2024-03-29 01:00
linux
java实体中返回前端的dou
ble
类型四舍五入(格式化)
根据业务,需要通过后端给前端返回部分dou
ble
类型的数值,一般需要保留两位小数,使用jackson转换对象packagecom.ruoyi.common.core.config;importcom.fasterxml.jackson.core.JsonGenerator
婲落ヽ紅顏誶
·
2024-03-29 00:59
java
高阶SQL语句(二)
子语句可以与主语句所查询的表相同,也可以是不同表②子语句中的sql语句是为了,最后过滤出一个结果集,用于主语句的判断条件③in:将主表和子表关联/连接的语法环境准备:mysql>usekgc_ky35;Readingta
ble
www.mcb.com
·
2024-03-28 23:58
数据库
mysql
Web前端Html的表单
“提交数据方式:get/post”input单行输入框type=“text”文本name=“定义名称名字自定义”向后端提交的键readonly=“readonly”只读,不可修改,但是可以提交disa
ble
d
任家伟
·
2024-03-28 19:23
前端
html
.NET Core 将实体类转换为 SQL(ORM 映射)
4、创建表:使用CodeFirst.InitTa
ble
s方法创建数据库表。////
你小子在看什么……
·
2024-03-28 19:23
.NET
.netcore
sqlsugar
postgresql
设置mysql 数据库和表 的编码方式UTF-8
ALTERDATABASEyour_database_nameCHARACTERSETutf8mb4COLLATEutf8mb4_unicode_ci;2.创建表时指定编码为UTF-8:CREATETA
BLE
your_ta
ble
_name
盖盖衍上
·
2024-03-28 17:50
中间件
数据库
mysql
oracle
Ubuntu下安装Chrome浏览器(简单,使用)
下载安装GoogleChrome浏览器deb包极速下载:下载链接32位wgethttps://dl.google.com/linux/direct/google-chrome-sta
ble
_current_i386
Starry-sky(jing)
·
2024-03-28 16:19
[linux操作系统笔记]
chrome
深度学习
linux
若依框架集成seata分布式事务的一些幺蛾子
一、bug连环炮A服务调用B服务,B服务异常,A服务插入的数据没有回退,前面没有思路,就查了下,说是没有切换为seata的数据源,我就在启动类加了一个@Ena
ble
AutoDataSourceProxy
半山惊竹
·
2024-03-28 15:19
分布式
mysql 常见数据表操作
1,表操作1,建表+注释CREATETA
BLE
student(idINTPRIMARYKEYAUTO_INCREMENTCOMMENT'学号',nameVARCHAR(200)COMMENT'姓名',ageINTCOMMENT
天狼1222
·
2024-03-28 11:42
mysql系列
mysql
数据库
git使用代理解决无法clone的问题及git代理设置
gitclonehttps://android.googlesource.com/platform/packages/apps/MessagingCloninginto‘Messaging’…fatal:una
ble
toaccess
yaningli
·
2024-03-28 09:40
2021-12-23
第一学期复盘模版:1我的大学生活之大学英语学习1)在这个学期的大学英语学习中,我的GPS[Gains]Ilearnedalot.Ilearnedalotofinterestingstories[Pro
ble
ms
人文二班zxh
·
2024-03-27 06:48
为什么 /proc/meminfo 节点获取的 MemTotal 小于物理内存
系统启动过程中打印的内存容量524288K(512M)跟物理内存容量一致Memory:489736K/524288Kavaila
ble
(9216Kkernelcode,685Krwdata,1896Krodata
源码注释器
·
2024-03-27 03:51
笔记
linux
CentOS7使用firewalld打开关闭防火墙与端口
的基本使用启动:systemctlstartfirewalld关闭:systemctlstopfirewalld查看状态:systemctlstatusfirewalld开机禁用:systemctldisa
ble
firewalld
gurlan
·
2024-03-27 02:57
sta
ble
diffusion 提示词进阶语法-学习小结
sta
ble
diffusion提示词进阶语法前言提示词语法基础正向提示词基础负面提示词可选正向提示词(特写镜头提示词)进阶语法1——提示词注释进阶语法2——and连接词进阶语法3——BREAK阻断前言AI
DTcode7
·
2024-03-26 23:14
AI
stable
diffusion
提示词
进阶语法
Elasticsearch8 - Docker安装Elasticsearch8.12.2
8.12.2dockerpulldocker.elastic.co/elasticsearch/elasticsearch:8.12.2创建配置新增配置文件elasticsearch.ymlhttp.host:0.0.0.0http.cors.ena
ble
d
王谷雨_
·
2024-03-26 20:39
ElasticSearch
elasticsearch
docker
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