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Ruby on Rails and Rake problems: uninitialized constant Rake::DSL
...standing is that there is a difference between 'installing' gems onto your PC and 'installing' them in a gem registry - I suspect this is because the Ruby installation needs to know which gems are where on your PC. Perhaps this is something that could be automated in future, or is already automated...
How to comment a block in Eclipse?
.../* */" block comment. Use Ctrl-Shift-\ in that case.
EDIT: It's Ctrl on a PC, but on a Mac the shortcuts may all be Cmd instead. I don't have a Mac myself, so can't easily check.
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社交应用组件 · App Inventor 2 中文网
...以下属性将设置为有关所选联系人的信息：
联系人姓名：联系人姓名
邮箱地址：联系人的主要电子邮件地址
邮箱地址列表：联系人电子邮件地址列表
联系人URI：设备上联系人的 URI
电话号码：联系人的主要电话号码（...
Build unsigned APK file with Android Studio
...ew Android Studio, everything works fine if connect my smartphone with the pc and directly run the program in the Android Studio.
But now I want to test the program with other smartphones without connecting them to my pc.
...
Apache .htaccess 禁止访问某目录方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ent 500 /help/errors/internalerror.html
ErrorDocument 错误代码 /目录名/文件名.扩展名
当然如果提示的信息很少的话，我们直接使用html就行了，如：
ErrorDocument 404 "Sorry the page you access is not exist"
以上指令等同于
<Directory /路径>
ErrorDocumen...
Source unreachable when using the NuGet Package Manager Console
...
I restarted my PC and Visual Studio. but.. adding -Source nuget.org indeed did the trick for my new .vbproj instance inside my existing multi-project .sln
– bkwdesign
Feb 27 '15 at 17:43
...
无人驾驶汽车大难题 人工智能同人的差距显著 - 资讯 - 清泛网 - 专注C/C++...
...恶劣的下雪天测试自动驾驶汽车。沃尔沃计划在2017年将名为Driveme的自动驾驶项目进一步扩大。
看上去，无人驾驶确实是在加速向我们的生活驶近，但事实上，首批获得尝试Google无人驾驶汽车机会的美国Medium科技板块总编StevenLe...
互联网医疗新格局：顶级医生入场 - 资讯 - 清泛网 - 专注C/C++及内核技术
...三医院心脏外科主任、神州海德医疗集团董事长、中国著名心脏外科专家万峰的话来说，现在是“医生集团”的战国时代。
那么问题来了，顶级医生为什么要入场？
豪华的入场阵容
目前已经进入公众视野的医生团队阵容确实...
JavaScript variable assignments from tuples
... answered Dec 22 '10 at 19:44
pc1oad1etterpc1oad1etter
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Unable to install Maven on Windows: “JAVA_HOME is set to an invalid directory”
...place of work I was unable to set enviroment variables on my Windows based PC.
My workaround was to copy the mvn.bat file from %M2% into C:\WINNT and add the following to the top of the batch file:
@REM Needed as unable to set env variables on my desktop PC.
set MAVEN_OPTS=-Xms256m -Xmx1024m
set ...