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Usages of Null / Nothing / Unit in Scala
...mple is this:
implicit def zeroNull[B >: Null] =
new Zero[B] { def apply = null }
Nothing is used in the definition of None
object None extends Option[Nothing]
This allows you to assign a None to any type of Option because Nothing 'extends' everything.
val x:Option[String] = None
...
How to tell which version of a gem a rails app is using
I'm investigating a rails app - the prod server has two version of a specific gem installed, how can I tell which version the prod app is using?
...
Android: How to change the ActionBar “Home” Icon to be something other than the app icon?
My application's main icon consists of two parts in one image: a logo and a few letters below it. This works well for the launcher icon for the app, but when the icon appears on the left edge of the ActionBar, the letters get cut off and it doesn't look good.
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Difference between adjustResize and adjustPan in android?
...ite a code which is used to re-size the UI components when soft-keyboard appears.
When I use adjustResize, it res-size the UI components and at the same time adjustPan gave me same output.
I want to know the difference between them and when to use each component? Which one(adjustPan or adjus...
Executing Shell Scripts from the OS X Dock?
..."Run Shell Script"
Then File > Save As, and change the File Format to "Application". When you open the application, it will run the Shell Script step, executing the command, exiting after it completes.
The benefit to this is it's really simple to do, and you can very easily get user input (say,...
Where do alpha testers download Google Play Android apps?
I have developed my app and have published it through Google Play for alpha testing. As one of the testers I get an opt-in link, where I signed in as a tester. After that I was hoping to download the app directly with my phone by going to the Play Store on my phone. But as it seems to turn out, I ha...
App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
计算器这个看似简单的应用，当你一旦着手去制作时，就会发现写出来的程序漏洞百出，那些在人类看来理所当然的逻辑，对于计算机来说，却是浑然不知，一定要将每个细节都照顾到，程序才能如你所愿地运行，否则就会出现...
What does middleware and app.use actually mean in Expressjs?
Almost every Express app I see has an app.use statement for middleware but I haven't found a clear, concise explanation of what middleware actually is and what the app.use statement is doing. Even the express docs themselves are a bit vague on this. Can you explain these concepts for me please?
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Base64Util 拓展：支持图像框、画布、文件、文本字符串、图像精灵base64编...
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How to define two angular apps / modules in one page?
I'm trying to add two angular apps / modules to one page.
In the fiddles below you can see that always only the first module, referenced in the html code, will work correctly, whereas the second is not recognized by angular.
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