Does主题的文章列表，还有Does的技术要点_第30页

mysql 1449 ： The user specified as a definer ('root'@'%') does not exist 解决方法

权限问题，授权给root 所有sql权限mysql>grantallprivilegeson*.*toroot@"%"identifiedby".";QueryOK,0rowsaffected(0.00sec)mysql>flushprivileges;QueryOK,0rowsaffected(...

代码星球 ·2021-02-11

Mysql的“Table 'mysql.servers' doesn't exist”的解决方法

安装MYSQL后，又一次系统出现问题了，于是我查看mysql的错误日志，竟发现Table'mysql.servers'doesn'texist问题的错误，虽然与我的问题无关，但这个问题还是引起我的注意。分析看是缺少mysql.servers这个表。后上网寻找解决办法，发现解决这个问题有两个方法：解决方法一，自己建立这张...

代码星球 ·2021-02-11

XML fragments parsed from previous mappers does not contain value for com.miniprogram.meirong.comment.dao.CommentMapper.Base_Column_List

mybatis出错了，正在找原因。XMLfragmentsparsedfrompreviousmappersdoesnotcontainvalueforcom.miniprogram.meirong.user.dao.UserMapper.Blob_Column_List嗯，这个报错，要看仔细，之后去分析，不能怕，一目...

代码星球 ·2021-02-09

Define class with itself as generic implementation. Why/how does this work?

https://stackoverflow.com/questions/10709061/define-class-with-itself-as-generic-implementation-why-how-does-this-work问题：I'venormallybeencreatingPrismEventsused...

代码星球 ·2021-02-08

What does jQuery.fn mean?

njQuery,thefnpropertyisjustanaliastotheprototypeproperty.ThejQueryidentifier(or$)isjustaconstructorfunction,andallinstancescreatedwithit,inheritfromtheconstruct...

代码星球 ·2021-02-08

Why does typeof array with objects return “Object” and not “Array”?

https://stackoverflow.com/questions/4775722/check-if-object-is-an-arrayOneoftheweirdbehaviourandspecinJavascriptisthetypeofArrayis Object.Youcancheckifthev...

代码星球 ·2021-02-08

asp.net web api history and how does it work?

https://blogs.msdn.microsoft.com/zxue/2012/11/07/what-is-asp-net-web-api-and-how-does-it-work/https://www.codeproject.com/Articles/341414/WCF-or-ASP-NET-Web-API...

代码星球 ·2021-02-08

How does asp.net web api work?

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代码星球 ·2021-02-08

How does flyway sort version numbers?

https://stackoverflow.com/questions/19984397/how-does-flyway-sort-version-numbersInoneword:numerically.Aswouldbeexpectedforanumber. https://flywaydb.org/do...

代码星球 ·2021-02-08

The current .NET SDK does not support targeting .NET Core 3.0

SeverityCodeDescriptionProjectFileLineSuppressionStateErrorNETSDK1045Thecurrent.NETSDKdoesnotsupporttargeting.NETCore3.0.Eithertarget.NETCore2.1orlower,oruseave...

代码星球 ·2021-02-08

jQuery FileUpload doesn't trigger 'done'

https://stackoverflow.com/questions/14674999/jquery-fileupload-doesnt-trigger-done IfyourserverisnotreturningJSON,tryremoving:dataType:'json'Otherwis...

代码星球 ·2021-02-08

What does the dot after dollar sign mean in jQuery when declaring variables?

https://stackoverflow.com/questions/22156664/what-does-the-dot-after-dollar-sign-mean-in-jquery-when-declaring-variablesIseevariablesdeclaredas:$.root=$("body")...

代码星球 ·2021-02-08

Make jQuery throw error when it doesn't match an element

解答1YoucouldmakeaplugintousetoensurethatthejQueryobjectisnotempty:$.fn.ensure=function(){if(this.length===0)throw"EmptyjQueryresult."returnthis;}Usage:$('ul.some...

代码星球 ·2021-02-08

How does ASP.NET Forms Authentication really work?

I'vealwayswonderedhowexactlyASP.NETformsauthenticationworks.Yes,IknowhowtoconfigureFormsAuthentication,buthowdoesformsauthenticationworkinthebackground? Wi...

代码星球 ·2021-02-08

Python：TypeError: 'range' object doesn't support item deletion

报错代码：1dataIndex=range(m)2del(dataIndex[randIndex]) 报错信息：错误原因：python3range返回的是range对象，不是数组对象解决办法：dataIndex=range(m)改成dataIndex=list(range(...

代码星球 ·2021-02-08