草庐IT

Your build is currently configured to use Java 17.0.6 and Gradle 5.6.4.

报错信息UnsupportedJava.YourbuildiscurrentlyconfiguredtouseJava17.0.6andGradle5.6.4.Possiblesolution:-UpgradeGradlewrapperto7.2versionandre-importtheprojectCouldnotopencp_initremappedclasscachefordw5ezsq9vnujkjvxyvhfx35dd(C:\Users\lenovo\.gradle\caches\5.6.4\scripts-remapped\ijmapper_39sxepuidel0xqznoto

Golang : panic: runtime error: invalid memory address or nil pointer dereference using bufio. 扫描器

我正在实现一个使用bufio.Scanner和bufio.Writer的go程序,我已经将我的代码打包如下packagemainimport("fmt""player/command""strings")funcmain(){//Enteryourcodehere.ReadinputfromSTDIN.PrintoutputtoSTDOUTforcommands.Scanner.Scan(){//scananewlineandsendittocomandvariabletocheckcommandexistornotinput:=strings.Split(strings.Trim(c

Golang : panic: runtime error: invalid memory address or nil pointer dereference using bufio. 扫描器

我正在实现一个使用bufio.Scanner和bufio.Writer的go程序,我已经将我的代码打包如下packagemainimport("fmt""player/command""strings")funcmain(){//Enteryourcodehere.ReadinputfromSTDIN.PrintoutputtoSTDOUTforcommands.Scanner.Scan(){//scananewlineandsendittocomandvariabletocheckcommandexistornotinput:=strings.Split(strings.Trim(c

Warning: You are using macOS 13.We do not provide support for this pre-release version.

安装git报错brewinstallgit解决方法:直接根据提示安装:xcode-select--install接着安装git  brewinstallgit git安装成功 

Postgresql聚合报错:column XXX must appear in the GROUP BY clause or be used in an aggregate function

postgresql聚合报错1参考文章2原因分析:3解决3.1例如:3.2查询语句3.3原因分析:3.4解决:1参考文章一篇文章写的很清晰,可参考:https://zhuanlan.zhihu.com/p/4573417062原因分析:聚合的本意是得到一个集合的某些属性值:最大值、最小值、平均值、总和。。。。这些属性都是原来列经过计算得出的新数据,当我们直接引用未处理的原表数据时就会有问题3解决3.1例如:求3个人花费的聚合user_namecosttom23jessy12tom33.2查询语句select user_name, cost,fromt_costgroupbyuser_namee

UserWarning: To copy construct from a tensor, it is recommended to use sourceTensor.clone...的解决方案

今天跑程序的过程中,遇到两个报错信息,由于不耽误程序的运行,之前一直没有留意,今天给修复了一下bug报错信息:UserWarning:Tocopyconstructfromatensor,itisrecommendedtousesourceTensor.clone().detach()orsourceTensor.clone().detach().requires_grad_(True),ratherthantorch.tensor(sourceTensor). y_support=torch.tensor(y_support,dtype=torch.int64)解决方案:torch.tens

http - GOLANG,HTTP 有 "use of closed network connection"错误

我遇到了很多如下所述的错误,读取tcpxx.xx.xx.xx:80:使用关闭的网络连接读取tcpxx.xx.xx.xx:80:由对等方重置连接//HTTP连接函数funcGetResponseBytesByURL_raw(restUrl,connectionTimeOutStr,readTimeOutStrstring)([]byte,error){connectionTimeOut,_/*err*/:=time.ParseDuration(connectionTimeOutStr)readTimeOut,_/*err*/:=time.ParseDuration(readTimeOut

http - GOLANG,HTTP 有 "use of closed network connection"错误

我遇到了很多如下所述的错误,读取tcpxx.xx.xx.xx:80:使用关闭的网络连接读取tcpxx.xx.xx.xx:80:由对等方重置连接//HTTP连接函数funcGetResponseBytesByURL_raw(restUrl,connectionTimeOutStr,readTimeOutStrstring)([]byte,error){connectionTimeOut,_/*err*/:=time.ParseDuration(connectionTimeOutStr)readTimeOut,_/*err*/:=time.ParseDuration(readTimeOut

uses ARM-Compiler ‘Default Compiler Version 5‘ which is not available. MDK5.37安装ARM_Compiler_5

MDK5.37安装ARM_Compiler_5最后一个AC5编译器,从MDK5.37开始,不再默认安装,需要独立安装ARMCompiler_506_Windows_x86_b960.zip(80.94MB)否则使用AC5编译代码报错如下:Buildstarted:Project:Project***Target'STM3210C_EVAL'usesARM-Compiler'DefaultCompilerVersion5'whichisnotavailable.***PleasereviewtheinstalledARMCompilerVersions:'ManageProjectItems-F

multithreading - 戈朗 : why using goroutines to parallelize calls ends up being slower?

我有两个版本的合并排序实现。第一个是“正常”版本,第二个使用goroutines并行化在递归的每个步骤中对slice的每个子集完成的工作。人们会假设能够并行化这项工作将使并发实现更快:如果我需要处理sliceA和sliceB,那么同时处理它们应该比同步执行更快。现在我假设我的理解的实现有问题,因为我的并发版本最终比同步版本慢13-14倍。任何人都可以指出我所缺少的正确方向吗?“正常”(同步实现)://MergeSortsortstheslicesusingMergeSortAlgorithmfuncMergeSort(s[]int)[]int{iflen(s)“并发”版本://Merg