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Converting pixels to dp

... Its funny how the answer is more helpful when it doesn't really answer the question -_- I thought I wanted what the question asked then I realized I didn't! So great answer. I do have a question. How can I obtain the last paramter for applyDimension? Can I just do getResource().getDi...
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Can not connect to local PostgreSQL

... This really looks like a file permissions error. Unix domain sockets are files and have user permissions just like any other. It looks as though the OSX user attempting to access the database does not have file permissions to acce...
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Kill child process when parent process is killed

...plication dies, you are still left with child processes running. What we really want is for the child processes to die as soon as the main process dies. The solution is to use "job objects" http://msdn.microsoft.com/en-us/library/ms682409(VS.85).aspx. The idea is to create a "job object" for your ...
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In Docker, what's the difference between a container and an image? [duplicate]

... running (or stopped) instances of some image. Start with the base image called 'ubuntu'. Let's run bash interactively within the ubuntu image and create a file. We'll use the -i and -t flags to give us an interactive bash shell. $ docker run -i -t ubuntu /bin/bash root@48cff2e9be75:/# ls bin bo...
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Run PHP Task Asynchronously

...egistration' button, I don't want to make them wait until the email is actually sent, I just want to start the process, and return a message to the user right away. ...
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Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher

I have installed a latest maven-3.0.4 on Windows 7 : The installation details are as follows: Installation Path : ...
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How to use ssh agent forwarding with “vagrant ssh”?

...y pair on a vagrant box, I would like to re-use the key pair I have on my host machine, using agent forwarding . I've tried setting config.ssh.forward_agent to TRUE in the Vagrantfile, then rebooted the VM, and tried using: ...
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Location Manager Error : (KCLErrorDomain error 0)

...st had this problem. Took me a while to find the solution, which is only loosely related to the previous poster's answer. Airport (WiFi) must be on for CoreLocation in the iPhone/iPad Simulator to work. I was connected via Ethernet so CL didn't do anything in the Simulator. Turn on Airport in you...
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FFmpeg on Android

...There's a lot of documentation out there on how to work with the NDK. Basically you'll need to write some C/C++ code to export the functionality you need out of ffmpeg into a library java can interact with through JNI. The NDK allows you to easily link against the static libraries you've generated i...
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Difference between Service, Async Task & Thread?

... is the difference between Service, Async Task & Thread. If i am not wrong all of them are used to do some stuff in background. So, how to decide which to use and when? ...