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How to avoid reinstalling packages when building Docker image for Python projects?
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Try to build a Dockerfile which looks something like this:
FROM my/base
WORKDIR /srv
ADD ./requirements.txt /srv/requirements.txt
RUN pip install -r requirements.txt
ADD . /srv
RUN python setup.py install
ENTRYPOINT ["run_server"]
Docker will use cache during pip install as long a...
How and/or why is merging in Git better than in SVN?
...e -r 2:7 {link to branch b1}
… which will attempt to merge the changes from b1 into your local working directory. And then you commit the changes after you resolve any conflicts and tested the result. When you commit the revision tree would look like this:
1 2 4 6 8 9
trunk ...
Does return stop a loop?
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@o-o Sort of true. return still returns from the current iteration of the function callback, in its own scope, but would not be expected to break from the entire calling method forEach(). So it isn't returning from the loop itself, but it is returning from the call...
Inherit from a generic base class, apply a constraint, and implement an interface in C#
This is a syntax question. I have a generic class which is inheriting from a generic base class and is applying a constraint to one of the type parameters. I also want the derived class to implement an interface. For the life of me, I cannot seem to figure out the correct syntax.
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Synchronizing a local Git repository with a remote one
...ommitted changes.
Although your local commits and changes will disappear from sight after this, it is possible to recover committed changes, if necessary.
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How can I force division to be floating point? Division keeps rounding down to 0?
...n Python 3, it produces a float. We can get the new behaviour by importing from __future__.
>>> from __future__ import division
>>> a = 4
>>> b = 6
>>> c = a / b
>>> c
0.66666666666666663
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Unable to execute dex: method ID not in [0, 0xffff]: 65536
...ally patch the application ClassLoader, so it will be able to load classes from secondary dexes. Fortunately, there's a library that does that for you. Add it to your app's dependencies:
dependencies {
...
compile 'com.android.support:multidex:1.0.0'
}
You need to call the ClassLoader patc...
Animate change of view controllers without using navigation controller stack, subviews or modal cont
...KeyAndVisible];
return YES;
}
To transition to a new view controller from any view controller
- (IBAction)flipToView
{
anotherViewController *vc = [[AnotherViewController alloc] init...];
MyAppDelegate *appDelegate = [UIApplication sharedApplication].delegate;
[appDelegate.transit...
Android Emulator: Installation error: INSTALL_FAILED_VERSION_DOWNGRADE
...ionCode (integer value for your version number).
You might have installed from a separate copy of the code where the version number was higher than the copy you're working with right now. In either case, either:
uninstall the currently installed copy
or open up your phone's Settings > Applica...
Using OpenGl with C#? [closed]
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Update 18th January 2016: Today the OpenTK maintainer has stepped away from the project, leaving its future uncertain. The forums are filled with spam. The maintainer recommends moving to MonoGame or SDL2#.
Update 30th June 2020: OpenTK has had new maintainers for a while now and has an active d...