#go

Go语言生成随机数

在日常开发中,生成随机数是很常见的需求,Go语言有两种方式来生成随机数,分别由 math/rand 和 crypo/rand 库来提供。为什么会提供两种方式呢?其实两者是有区别的,math 提供的是伪随机数,生成的随机序列不是真正的随机;而 crypo&nbs...
开发笔记 开发笔记·2024-02-24

Golang中实现除法取整的方法

方法一:使用类型转换一种简单的方法是使用类型转换将浮点数结果转换为整数。可以使用内置的int()函数来实现。以下是一个示例代码:packagemainimport"fmt"funcmain(){vardividend,divisorfloat64=10,3result:=int(dividend/divisor)fmt...

Oracle数据库:ORA-01017: invalid username/password; logon denied

报错:ORA-01017:invalidusername/password;logondenied错误说明:用户名和密码无效,登录被拒绝。1<connectionStrings>2 <!--多个数据库,随机访问-->3 <addname="CamnprData...

MongoDB设置访问权限、设置用户

MongoDB已经使用很长一段时间了,基于MongoDB的数据存储也一直没有使用到权限访问(MongoDB默认设置为无权限访问限制),今天特地花了一点时间研究了一下,研究成果如下:注:研究成果基于Windows平台MongoDB在本机安装部署好后1.输入命令:showdbs,你会发现它内置有两个数据库,一个名为admi...

ORA-56716: Category string does not exist

文档解释ORA-56716:CategorystringdoesnotexistCause:Anon-existentcategorywasspecifiedasanargumenttoaprocedureinthepackage,DBMS_RESOURCE_MANAGER.Action:Specifyanexisti...

ORA-27200: skgfpgo: sbtpcstart returned error

文档解释ORA-27200:skgfpgo:sbtpcstartreturnederrorCause:sbtpcstartreturnedanerror.Thishappensduringaproxybackuporrestore.Action:Thiserrorisreturnedfromthemediamanage...

ORA-40273: invalid model type string for Adaptive Bayes Network algorithm

文档解释ORA-40273:invalidmodeltypestringforAdaptiveBayesNetworkalgorithmCause:Thevalidvaluesfortheabns_model_typesettingsare:abns_multi_feature,abns_single_feature,...

ORA-54548: input geometry gtype must be GTYPE_POLYGON for extrusion

文档解释ORA-54548:inputgeometrygtypemustbeGTYPE_POLYGONforextrusionCause:TheinputgeometrygtypewasnotGTYPE_POLYGON.Action:EnsurethatthegtypeoftheinputpolygonisGTYPE_...

ORA-13343: a polygon geometry has fewer than four coordinates

文档解释ORA-13343:apolygongeometryhasfewerthanfourcoordinatesCause:Ageometry,specifiedasbeingapolygon,hasfewerthanfourcoordinatesinitsdefinition.Action:Apolygonmust...

ORA-19225: XPST0005 – XQuery static type error: expected non empty type got empty sequence

文档解释ORA-19225:XPST0005–XQuerystatictypeerror:expectednonemptytypegotemptysequenceCause:Thestatictypeassignedtoanexpressionotherthanthe()expressionmustnotb...

ORA-40385: Target has more than two categories

文档解释ORA-40385:TargethasmorethantwocategoriesCause:Thetargetcontainedmorethantwocategories.Action:PMMLmodelimportsupportsonlybinarylogisticregression.Makesurethe...

ORA-06757: TLI Driver: server got bad command

文档解释ORA-06757:TLIDriver:servergotbadcommandCause:TheTLIserverreceivedaninvalidcommand.Action:Contactyourcustomersupportrepresentative.等。ORA-06757错误通常出现在一个客户端与数据...

ORA-13344: an arcpolygon geometry has fewer than five coordinates

文档解释ORA-13344:anarcpolygongeometryhasfewerthanfivecoordinatesCause:Ageometry,specifiedasbeinganarcpolygon,hasfewerthanfivecoordinatesinitsdefinition.Action:Anar...

ORA-39958: invalid warning category qualifier

文档解释ORA-39958:invalidwarningcategoryqualifierCause:Thecategoryqualifierwasincorrect.Action:Specifyavaildcategoryqualifier.ORA-39958错误表明,在快照组创建过程中指定的警告类别限定符无效。官方...

ORA-07418: sfareq: Database writer got error in timing function.

文档解释ORA-07418:sfareq:Databasewritergoterrorintimingfunction.Cause:Anerroroccurredwhenthedatabasewritercalledthesystemtimingfunction.Action:Checkthedatabasewrite...
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