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Creating an official github mirror
...itory for the forks, using names like github_torvalds_subsurface. It will fetch from every fork.
It downloads metadata from each fork. This is stored into a branch named "github". Each fork gets a directory in there, like torvalds_subsurface. Inside the directory there will be some files, like ...
Difference between acceptance test and functional test?
...qualities you've designed or build (functions, speed, errors, consistency, etc.)
Acceptance testing - test the product in its context, this requires (simulation of) human interaction, test it has the desired effect on the original problem(s).
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An “and” operator for an “if” statement in Bash
...(man test).
As some find lines like if test -f filename; then foo bar; fi, etc. annoying, on most systems you find a program called [ which is in fact only a symlink to the test program. When test is called as [, you have to add ] as the last positional argument.
So if test -f filename is basically ...
Virtual functions and performance - C++
...ourse cannot optimise based on what might happen at runtime, so prediction etc would have to be done by the CPU itself... but good C++ compilers (if instructed) go to great lengths to optimise functions and loops long before runtime.
– underscore_d
Apr 10 '16 a...
What is the relationship between the docker host OS and the container base image OS?
...ou would need some kind of virtualization within the container (qemu, kvm, etc.)
Docker manage images that are the file system representation. You can install any linux distribution or simply put binaries.
Indeed, for the convenience of the example, we often rely on the base images, but you could ...
How to use SVN, Branch? Tag? Trunk?
...ry. That includes config files, build scripts, related media files, docs, etc. You should not check in files that need to be different on each developer's machine. Nor do you need to check in by-products of your code. I'm thinking mostly of build folders, object files, and the like.
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jQuery .hasClass() vs .is()
... is is multi-purpose, you can for example do is('.class'), is(':checked'), etc which means is has more to do where is hasClass is limited which only checks for a class being set or not.
Hence, hasClass should be faster if performance at any level is your priority.
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How can I restart a Java application?
...al File currentJar = new File(MyClassInTheJar.class.getProtectionDomain().getCodeSource().getLocation().toURI());
/* is it a jar file? */
if(!currentJar.getName().endsWith(".jar"))
return;
/* Build command: java -jar application.jar */
final ArrayList<String> command = new ArrayL...
In Python script, how do I set PYTHONPATH?
I know how to set it in my /etc/profile and in my environment variables.
6 Answers
6
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Create objective-c class instance by name?
... you are working with Objective-C without the NeXTstep (OS X, iOS, GNUstep etc) system or you just think this method is cleaner, then you could utilize the Objective-C language runtime library's API. Under Objective-C 2.0:
#import <objc/runtime.h>
//Declaration in the above named file
id ob...