大约有 333 项符合查询结果(耗时:0.0034秒) [XML]

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App Inventor 2 做个计算器怎手机运行后报错 - App应用开发 - 清泛IT社区,为创新赋能!

做个计算器怎手机运行后报错 什么原因呢?根据报错字面,2.63...除以 0 异常,一定要对除数进行非零的判断,使用数学代码块=0 判断。当输入框没有输入内容时,数学运算会转成 0 处理,因此就会出现除零异常。要先用文本块...
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为什么“Screen1.初始化”方法报错? - App应用开发 - 清泛IT社区,为创新赋能!

Q:为什么“Screen1.初始化”方法报错? A:可以点击红色叉叉查看报错具体原因。不过这里一看就是方法重复定义导致的。也就是有两个这个方法,去掉一个就行了。
https://bbs.tsingfun.com/thread-2363-1-1.html 

离线版启动超时,有报错日志 - App Inventor 2 离线版 - 清泛IT社区,为创新赋能!

web服务启动报错: Picked up JAVA_TOOL_OPTIONS: "-Dfile.encoding=UTF-8" Executing [D:\appinventor\AppInventor2\resources\app.asar.unpacked\OpenJDK\bin\java, --add-opens=java.base/java.lang=ALL-UNNAMED, -Xmx4G, --add-opens, java.base/java.net=ALL-UNNAMED, --add-opens, java.base/sun.ne...
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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

STL中map容器使用自定义key类型报错详解引言STL的map容器中,key的类型是不是随意的呢?实践编写测试代码定义一个结构体来试试:[cpp]view plaincopystructa{char*pName;intm_a;} 引言 STL的map容器中,key的类型是不是随意的呢? 实践 ...
https://www.tsingfun.com/it/tech/2158.html 

SVN 报错:Unable to create pristine install stream - 更多技术 - 清泛网 - 专注C/C++及内核技术

SVN 报错:Unable to create pristine install streamLooking at my hard disk, I saw that there's notmpfolder inside my.svnfolder.Creating thetmpfolder manually resolved the issue.解决方法:在.svn文件夾下手动新建文件夾tmp即可。Looking at my hard disk, I saw that there's no tmp fol...
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ssl证书申请报错:challenge = [c for c in authorization[\'challenges\']...

ssl证书申请报错:challenge = [c for c in authorization['challenges'] if c['type'] == "http-01"][0] IndexError: list index out of rangechallenge-list-index-out-of-range使用acme-tiny申请ssl证书时报错:challenge = [c for c in authorization[& 39;challenges& 39;] if c[& 39;type& 39;] == ...
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PHP连接MySQL报错:Fatal error: Call to undefined function mysql_connec...

...连接已经成功关闭'; } ?>复制代码 在浏览器中执行后,报错:Fatal error: Call to undefined function mysql_connect()... ·PHP等的配置(如php.ini)已经按照网上或书上的方法正确配置; ·DOS命令窗口中连接MySQL正确; ·PHP非数据库程序也能...
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【解决】eclipse新建项目报错:overlaps the location of another project:...

【解决】eclipse新建项目报错:overlaps the location of another project: 'xxx'eclipse-error-overlaps-the-location-of-another-projectEclipse新建项目时报错:overlaps the location of another project: & 39;xxx& 39;,确保workspace下没有重复的工程,但之前曾经添加并删...
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npm安装报错:rollbackFailedOptional verb npm-session - 更多技术 - 清泛网 - 专注IT技能提升

npm安装报错:rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错:rollbackFailedOptional: verb npm-session xxxx原因:组件目标地址无法访问导致,切换npm内网源或国内源即可解决。npm config set regist ...
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解决spawn-fcgi 报错:child exited with: xxx的方法 - 更多技术 - 清泛网 ...

解决spawn-fcgi 报错:child exited with: xxx的方法spawn-fcgi-child-exited-with出错的时候请加 -n 参数,会显示详细的错误信息:如:spawn-fcgi xxx -n出错的时候请加 -n 参数,会显示详细的错误信息: 如:spawn-fcgi xxx -nspawn fcgi