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What are namespaces?
...espacing does for functions and classes what scope does for variables. It allows you to use the same function or class name in different parts of the same program without causing a name collision.
In simple terms, think of a namespace as a person's surname. If there are two people named "John" yo...
How to dismiss ViewController in Swift?
...@naturalc: Be aware that if navigationController is nil and you put !, the app will crash
– jobima
Nov 18 '15 at 10:37
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Android emulator shows nothing except black screen and adb devices shows “device offline”
...tor comes up on the screen. But even after waiting for as long as 2-3 hrs, all it shows is a black screen. Not even the android home screen or the android logo. Just a black screen. And while initially "adb devices" shows the emulator as offline.after 2-3 minutes the list of attached devices becomes...
'heroku' does not appear to be a git repository
When I try to push my app to Heroku I get this response:
20 Answers
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how to remove X-Powered-By in ExpressJS [duplicate]
...ity,Save Bandwidth in ExpressJS(node.js). how to do it?
it could be filter(app.use) ?
4 Answers
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CSS text-overflow: ellipsis; not working?
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Note: white-space: nowrap is actually not necessary. We can still see the ellipses even without it. For multiple lines text-overflow, see this SO
– gfaceless
Jul 9 '15 at 10:38
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What exactly is Heroku?
I just started learning Ruby on rails and I was wondering what Heroku really is? I know that its a cloud that helps us to avoid using servers? When do we actually use it?
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if a ngSrc path resolves to a 404, is there a way to fallback to a default?
... if the url is broken (404), but if it's an empty string ng-src silently swallows the error.
– Stephen Patten
Sep 18 '13 at 18:43
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App Inventor 2 如何连接MySQL数据库（阿里云数据库） · App Inventor 2 中文网
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App Inventor 2 接入阿里云短信服务，实现短信验证码功能 · App Inventor 2 中文网
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