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Using Java 8's Optional with Stream::flatMap
...e out what it was doing, and it also took me a while to write up the above description of what it was doing. The key subtlety is the transformation from Optional<Other> to Optional<Stream<Other>>. Once you grok this it makes sense, but it wasn't obvious to me.
I'll acknowledge, th...
Allow anything through CORS Policy
...cors'
and then save and run bundle install
2nd Step:
update your config/application.rb file by adding this:
config.middleware.insert_before 0, Rack::Cors do
allow do
origins '*'
resource '*', :headers => :any, :methods => [:get, :post, :options]
end
end
fo...
Is there a naming convention for MySQL?
...
MySQL has a short description of their more or less strict rules:
https://dev.mysql.com/doc/internals/en/coding-style.html
Most common codingstyle for MySQL by Simon Holywell:
http://www.sqlstyle.guide/
See also this question:
Are there an...
Get environment variable value in Dockerfile
I'm building a container for a ruby app. My app's configuration is contained within environment variables (loaded inside the app with dotenv ).
...
How to fix Error: listen EADDRINUSE while using nodejs?
...d to that port. ps aux | grep node would show that. Instead of killing the application with CTRL+Z, exit the application with CTRL+C. This exits the application gracefully and the port binding is removed.
– riser101
Dec 7 '15 at 10:29
...
Mixing C# & VB In The Same Project
...</codeSubDirectories>
The all VB code goes into a subfolder in the App_Code called VB and the C# code into the CS subfolder. This will produce two .dll files. It works, but code is compiled in the same order as listed in "codeSubDirectories" and therefore i.e Interfaces should be in the VB f...
Why hasn't functional programming taken over yet?
... completely.
Imperative and object-oriented programming is a step-by-step description of the problem and its solution. As such, it can be easier to comprehend. Functional programming can be a bit obscure.
Ultimately, a useful program will always have side effects (like providing actual output to...
Android LinearLayout : Add border with shadow around a LinearLayout
...in pre-lollipop devices.
<android.support.v7.widget.CardView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:cardUseCompatPadding="true"
app:cardElevation="4dp"
app:cardCornerRadius="3dp" >...
Why do we use $rootScope.$broadcast in AngularJS?
...cope.$broadcast do?
$rootScope.$broadcast is sending an event through the application scope.
Any children scope of that app can catch it using a simple: $scope.$on().
It is especially useful to send events when you want to reach a scope that is not a direct parent (A branch of a parent for example...
WebRTC vs Websockets: If WebRTC can do Video, Audio, and Data, why do I need Websockets? [closed]
So I'm looking to build a chat app that will allow video, audio, and text. I spent some time researching into Websockets and WebRTC to decide which to use. Since there are plenty of video and audio apps with WebRTC, this sounds like a reasonable choice, but are there other things I should consider? ...