java - cocos2d中无法实例化类型类名
全部标签 我们能否像在java中那样在Ruby中公开接口(interface),并强制Ruby模块或类实现接口(interface)定义的方法。一种方法是使用继承和method_missing来实现相同的目的,但是还有其他更合适的方法吗? 最佳答案 Ruby与任何其他语言一样具有接口(interface)。请注意,您必须注意不要将接口(interface)的概念与interface的概念混淆,接口(interface)是一个单元的职责、保证和协议(protocol)的抽象规范。这是Java、C#和VB.NET编程语言中的关键字。在Ruby中,
当我尝试安装rmagick时,我收到以下错误消息:Can'tinstallRMagick2.13.1.Can'tfindMagickWand.h.***extconf.rbfailed***CouldnotcreateMakefileduetosomereason,probablylackofnecessarylibrariesand/orheaders.Checkthemkmf.logfileformoredetails.Youmayneedconfigurationoptions.我在MacOSX10.6.8、ruby1.9.2p290、rvm1.10.2上。谁能帮我解决这个问题。
ruby1.9.3Gemfile部分#...............gem"pony"gem"bcrypt-ruby",:require=>"bcrypt"gem"nokogiri"#..................当我尝试安装gems时,出现错误alex@ubuntu:~/$bundleFetchinggemmetadatafromhttp://rubygems.org/.........Fetchinggemmetadatafromhttp://rubygems.org/..EnteryourpasswordtoinstallthebundledRubyGemstoyoursy
我无法在ElCapitanBeta5上安装和运行fakes3gem。我试过:sudogeminstallfakes3ERROR:Whileexecutinggem...(Errno::EPERM)Operationnotpermitted-/usr/bin/fakes3然后我尝试用cocoapods的方式来做。它适用于cocoapods但不适用于fakes3。mkdir-p$HOME/Software/rubyexportGEM_HOME=$HOME/Software/rubygeminstallcocoapods[...]1geminstalledgeminstallfakes3ER
我尝试使用geminstallpg但它似乎不起作用。geminstallpg给出这个错误TemporarilyenhancingPATHtoincludeDevKit...Buildingnativeextensions.Thiscouldtakeawhile...ERROR:Errorinstallingpg:ERROR:Failedtobuildgemnativeextension.C:/Ruby/bin/ruby.exeextconf.rbcheckingforpg_config...noNopg_config...tryinganyway.Ifbuildingfails,ple
每次我运行rails4.0服务器时,我都会得到这个输出。StartedGET"/"for127.0.0.1at2013-11-0623:56:36-0500PG::ConnectionBad-couldnotconnecttoserver:ConnectionrefusedIstheserverrunningonhost"localhost"(::1)andacceptingTCP/IPconnectionsonport5432?couldnotconnecttoserver:ConnectionrefusedIstheserverrunningonhost"localhost"(12
当我尝试安装最新版本的compass(https://rubygems.org/gems/compass/versions/1.0.0.alpha.17)时,出现以下错误。ERROR:Errorinstallingcompass:ERROR:Failedtobuildgemnativeextension.ERROR:Errorinstallingcompass:ERROR:Failedtobuildgemnativeextension./System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/rubyextconf.r
我正在尝试完成MichaelHartl教程。当我尝试在我的gemset中安装rails3.2.14时,出现以下问题:$geminstallrails-v3.2.14ERROR:Couldnotfindavalidgem'rails'(=3.2.14),hereiswhy:Unabletodownloaddatafromhttps://rubygems.org/-SSL_connectreturned=1errno=0state=SSLv3readservercertificateB:certificateverifyfailed(https://s3.amazonaws.com/pro
关于此问题的大多数问题都是由于缺少Xcode;我安装了Xcode4.2。安装尝试:rvminstall1.9.3InstallingRubyfromsourceto:/Users/jamie/.rvm/rubies/ruby-1.9.3-p0,thismaytakeawhiledependingonyourcpu(s)...ruby-1.9.3-p0-#fetchingruby-1.9.3-p0-#extractedto/Users/jamie/.rvm/src/ruby-1.9.3-p0(alreadyextracted)Fetchingyaml-0.1.4.tar.gzto/Use
我正在尝试从JavaScript/jQuery访问asp.net变量(c#)。我找到了解决方案,here和here.但不幸的是,这些对我不起作用。这是一个片段:Default.aspx.cspublicpartialclassDefault:System.Web.UI.Page{publicstringCurrentUser{get;set;}protectedvoidPage_Load(objectsender,EventArgse){CurrentUser=User.Identity.Name.Split('\\')[1];//Ineedthevalueof"CurrentUser