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Uncaught TypeError: Cannot read properties of undefined (rea

vue页面UncaughtTypeError:Cannotreadpropertiesof undefined (reading‘install’)报错，页面全空白。然后发现是自己写的指令全局引用的原因使用了export导出export{preventReClick}复制代码...

开发笔记 ·2024-09-29

layer出现Uncaught ReferenceError: layer is not defined错误

layer出现UncaughtReferenceError:layerisnotdefined错误的原因，代码如下：//layui的JavaScript代码区域layui.use('layer',function(){varlayer=layui.layer;var$=layui.$;//获得layui中的jquery...

开发笔记 ·2024-09-29

FileFilter 遍历某个目录下文件名含有某个字符的文件

由于IIS版本的升级，造成了文件名中含有“+”的特殊字符的文件（多数是图片）在网页中不能被访问，于是必须查找当前目录下含有多少这样的文件，从而制定最佳的解决方案。废话少说，直接上核心代码：publicvoidGetAllFilesInDirectory(stringstrDirectory,st...

开发笔记 ·2024-08-29

null和undefined的区别

null和undefined都是js中的特殊值，表示缺失或未定义的值。null表示一个空对象指针，即该变量本应该指向一个对象，但是现在没有指向任何一个对象。例如：varobj=null;undefined表示一个未定义的值，即该变量没有被赋值或者被赋值为undefined。例如：varx;console.log(x);...

开发笔记 ·2024-07-02

ORA-55366: unknown namespace prefix “string”

文档解释ORA-55366:unknownnamespaceprefix“string”Cause:AnattemptwasmadetomakeuseofanundefinednamespaceprefixinOracleVirtualPrivateDatabase(VPD)metadata.A...

IT技术学习 ·2023-07-28

ORA-51701: Invalid file URL or path prefix

文档解释ORA-51701:InvalidfileURLorpathprefixCause:EitheraURLorpathprefixwithinvalidsyntaxwasprovided.Action:ChecktheURL.ORA-51701:InvalidfileURLorpathprefix错误码发生在应用...

IT技术学习 ·2023-07-28

ORA-41697: attribute prefix missing in aggregate specification: string

文档解释ORA-41697:attributeprefixmissinginaggregatespecification:stringCause:Anattemptwasmadetospecifyanaggregatepredicateacrossmultipleprimitiveeventtypeswithnoatt...

IT技术学习 ·2023-07-28

ORA-53048: definer name DICOM is not allowed in a private dictionary

文档解释ORA-53048:definernameDICOMisnotallowedinaprivatedictionaryCause:TheoperationfailedbecausethedefinernameDICOMwasfoundintheprivatedictionary.Action:Correctthe...

IT技术学习 ·2023-07-28

ORA-53432: The DICOM object attribute string has invalid definer name.

文档解释ORA-53432:TheDICOMobjectattributestringhasinvaliddefinername.Cause:AprivateattributedefinerforaprivateattributecontainedinthisDICOMobjecthadinvalidcharacter...

IT技术学习 ·2023-07-28

ORA-29533: attempt to overwrite class or resource string while defining or compiling string.string

文档解释ORA-29533:attempttooverwriteclassorresourcestringwhiledefiningorcompilingstring.stringCause:AclassorresourcedefinedbyaSQLJsourceconflictedwithanexistingobje...

IT技术学习 ·2023-07-28

ORA-47000: Factor Type string already defined

文档解释ORA-47000:FactorTypestringalreadydefinedCause:TheobjectwiththisnameexistsalreadyAction:ChooseauniqueobjectnameandretrytheoperationORA-47000是一个通用错误，称为“因素类型st...

IT技术学习 ·2023-07-28

ORA-53061: document name string contains reserved prefix – ORD

文档解释ORA-53061:documentnamestringcontainsreservedprefix–ORDCause:TheoperationfailedbecausethespecifieddocumentnamecontainedtheORDprefixthatisreservedforOra...

IT技术学习 ·2023-07-28

ORA-42036: cannot online redefine temporary table “string”.”string”

文档解释ORA-42036:cannotonlineredefinetemporarytable“string”.”string”Cause:Anattemptwasmadetoredefineatemporarytable.Action:Donotattempttoon...

IT技术学习 ·2023-07-28

ORA-64106: Incorrect use of comma(,) punctuation in COLUMN definitions.

文档解释ORA-64106:Incorrectuseofcomma(,)punctuationinCOLUMNdefinitions.Cause:AnattemptwasmadetodefineCOLUMNSwithincorrectuseofcommapunctuation.Action:Properlysepara...

IT技术学习 ·2023-07-28

ORA-24043: destination string uses a reserved name, names with AQ$_ prefix are not valid

文档解释ORA-24043:destinationstringusesareservedname,nameswithAQ$_prefixarenotvalidCause:Anattemptwasmadetospecifyareservednameforadestination.Action:Enteradifferen...

IT技术学习 ·2023-07-28