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How to make a class JSON serializable
...is do?
>>> f = FileItem("/foo/bar")
>>> magic(f)
'{"fname": "/foo/bar"}'
In that case you can merely call json.dumps(f.__dict__).
If you want more customized output then you will have to subclass JSONEncoder and implement your own custom serialization.
For a trivial example...
Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher
... this problem too, and found this article. For Maven3, changing my environment variable name from M2_HOME to M3_HOME did the trick. I am on a Mac running OSX 10.9 with JDK 1.7. Hope this helps.
Note: Please delete M2_HOME, if already set. Eg: unset M2_HOME
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Post-install script with Python setuptools
...Also you need to consider two different post-installations; one for development/editable mode and the other one for install mode.
Add these two classes that includes your post-install script to setup.py:
from setuptools import setup
from setuptools.command.develop import develop
from setuptools.co...
How to get the list of all installed color schemes in Vim?
Is there a way to get a list of all installed color schemes in Vim? That would make very easy to select one without looking at the .vim directory.
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The smallest difference between 2 Angles
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Beware in many languages the modulo operation returns a value with the same sign as the dividend (like C, C++, C#, JavaScript, full list here). This requires a custom mod function like so:
mod = (a, n) -> a - floor(a/n) * n
Or so:
mod = (a, n) -> (a % n + n) % n
If angles are within [-...
Why am I getting ibtool failed with exit code 255?
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I had something similar happen to me recently using Xcode 4.6 and iOS 6.1.
All I did was switch to a different device version (5.1) on the simulator and it ran. Switched back to 6.1 and it fixed itself.
Xcode can be unhelpful at ...
Android: install .apk programmatically [duplicate]
...nt(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
That is correct now, my auto-update is work...
Edit and Continue: “Changes are not allowed when…”
... create a clean WinForms project, Edit and Continue doesn't work and gives me the error:
36 Answers
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$.focus() not working
The last example of jQuery's focus() documentation states
13 Answers
13
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“inconsistent use of tabs and spaces in indentation”
I'm trying to create an application in Python 3.2 and I use tabs all the time for indentation, but even the editor changes some of them into spaces and then print out "inconsistent use of tabs and spaces in indentation" when I try to run the program.
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