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Bad class file magic or version
...ava module
apply plugin: 'java'
Solution #1: Quick an dirty
I fixed it by setting my JAVA_HOME back to 1.7:
export JAVA_HOME=`/usr/libexec/java_home -v 1.7`
Solution #2: change compiler version:
change back to 1.7 for this specific module in its build.gradle
apply plugin: 'java'
sourceCompa...
What does git push -u mean?
...inting out that the branch which is pushed to with git push isn't affected by the upstream branch configuration unless you have push.default set to tracking (or upstream in later versions of git).
– Mark Longair
Apr 22 '11 at 11:59
...
Difference between a Postback and a Callback
...a couple of points. Postback is a term that gets introduced very recently by ASP .NET programming as Dreas explained, whereas callback is more generic and has been used way before web development exists. In fact I first heard about callback back in the days when I started programming in C (maybe t...
Artificially create a connection timeout error
...meout. These errors are very rare (usually when my connection gets dropped by our internal network). How can I generate this kind of effect artificially so I can test our software?
...
ASP.NET_SessionId + OWIN Cookies do not send to browser
... exposed to us as System.Web.HttpResponse.Cookies property and implemented by sealed class System.Web.HttpCookieCollection. This implementation does not wrap response Set-Cookie header directly but uses some optimizations and handful of internal notifications to manifest it's changed state to respon...
What are the differences between -std=c++11 and -std=gnu++11?
...s because I don't recommend doing anything that isn't specifically defined by the Standard... but even then, "violates" is a strange and loaded term, when a lot of these extensions are, to use Standardese, just implementation-defining or specifying things that the Standard is silent on - or perhaps ...
RSpec controller testing - blank response.body
...
By default, rspec-rails hacks into Rails to prevent it from actually rendering view templates. You should only test the behavior of your actions & filters your controller tests, not the outcome of template rendering — t...
Linux vi arrow keys broken in insert mode
...Try:
:set nocompatible
(You may want to configure your .vimrc with this by adding this command to it. Create a new .vimrc file if not already present in your home directory, run echo $HOME to check home directory path.)
s...
Python argparse: Make at least one argument required
...one)
allow one or two actions to be called (at least one required).
try to by Pythonic (I would rather call it "POSIX"-like)
There are also some implicit requirements when living on command line:
explain the usage to the user in a way which is easy to understand
options shall be optional
allow s...
Difference between global and device functions
... explain it with an example:
main()
{
// Your main function. Executed by CPU
}
__global__ void calledFromCpuForGPU(...)
{
//This function is called by CPU and suppose to be executed on GPU
}
__device__ void calledFromGPUforGPU(...)
{
// This function is called by GPU and suppose to be exe...