def主题的文章列表，还有def的技术要点_第32页

js数组完美去重，区分undefined,NaN,null,字符串等

functionarray_unique(arr){letlen=arr.length;if(!len){return[];}lettmp=[];for(leti=0;i<len;i++){if(tmp.findIndex((v)=>{returnJSON.stringify(v)===JSON.strin...

代码星球 ·2021-02-11

pycharm python @符号不能识别 NameError: name 'app' is not defined

pycharmpython@符号不能识别NameError:name'app'isnotdefined解决办法：缺少：app=Flask(__name__)#导入Flask类fromflaskimportFlask#实例化，可视为固定格式app=Flask(__name__)#route()方法用于设定路由；类似spr...

代码星球 ·2021-02-11

No result defined for action

在开发中总遇到这个问题，Noresultdefinedforaction：原因：Action中的属性值为空的时候，Struts2的默认拦截器会报错，但是又找不到input的Result，不能够把错误返回，所以报这种错误。解决方法：1.在页面中给空值赋默认值。2.重新定义一个Action，去掉空值的成员变量。3.添加in...

代码星球 ·2021-02-11

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

maven NoClassDefFoundError: org/mortbay/util/Attributes

在运行mvnjetty:run报错：NoClassDefFoundError:org/mortbay/util/Attributes解决方法：deleted/home/jenkins/.m2/repository/org/mortbay/jetty/onallthebuildhostshttps://issues.ap...

代码星球 ·2021-02-11

Spring JUnit org.hibernate.HibernateException: Unable to get the default Bean Validation factory

org.hibernate.HibernateException:UnabletogetthedefaultBeanValidationfactory <propertyname="hibernateProperties"><props><propkey="hiber...

代码星球 ·2021-02-11

解决：win8.1 oepnvpn客户端 redirect-gateway def1无效，自动获取的IP没有网关问题

解决：win8.1oepnvpn客户端redirect-gatewaydef1无效，自动获取的IP没有网关问题该问题是操作系统权限问题，需要将程序设置为以管理员模式运行和以windows7兼容模式运行...

代码星球 ·2021-02-11

TypeError: Cannot read property ‘make‘ of undefined

/这搞个html-webpack-plugin插件进来运行就一大篇报错尴尬看了一圈又是版本兼容的问题，做下修改。。。。OK运行成功...

代码星球 ·2021-02-10

props传值遇Cannot read property getAttribute of undefined异常

/今有一个echarts图标的子组件使用watch监听接受父组件传入的data，而在父组件页面再次根据日期筛选数据，重新传入子组件进行图表重绘时老实会提示报错vue.runtime.esm.js?6e6d:619[Vuewarn]:Errorincallbackforwatcher"chartData":"TypeEr...

代码星球 ·2021-02-10

kentico7中设置site的default page

在SiteManager中，Settings中，选择好站点，然后Content，Defaultaliaspath ...

代码星球 ·2021-02-08

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

get the default proxy by Powershell

https://stackoverflow.com/questions/571429/powershell-web-requests-and-proxies$proxyAddr=(get-itemproperty'HKCU:SoftwareMicrosoftWindowsCurrentVersionInternetSe...

代码星球 ·2021-02-08

requirejs define a module

https://requirejs.org/docs/api.html#defineDefineaModule§1.3Amoduleisdifferentfromatraditionalscriptfileinthatitdefinesawell-scopedobjectthatavoidspolluting...

代码星球 ·2021-02-08

Asynchronous module definition

Asynchronousmoduledefinition(AMD)isaspecificationfortheprogramminglanguageJavaScript.Itdefinesanapplicationprogramminginterface(API)thatdefinescodemoduleandthei...

代码星球 ·2021-02-08

What is 'typeof define === 'function' && define['amd']' used for?

Thiscodechecksforthepresenceofrequire.js,aJavaScriptdependencymanagementlibrary.If'define'isnotundefinedanditisafunctionand'amd'(asynchronousmoduledefinition)is...

代码星球 ·2021-02-08