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What's the difference between ContentControl and ContentPresenter?
...control templates to display content.
ContentControl, when used directly (it's supposed to be used as a base class), has a control template that uses ContentPresenter to display it's content.
My rules of thumb (not applicable in every case, use your judgment):
Inside ControlTemplate use ContentP...
Python's many ways of string formatting — are the older ones (going to be) deprecated?
...% strings, there's no surviving plan to ever deprecate the latter.
In commit Issue #14123: Explicitly mention that old style % string formatting has caveats but is not going away any time soon., inspired by issue Indicate that there are no current plans to deprecate printf-style formatting, the doc...
How do you serialize a model instance in Django?
... object and that's all what django serializers need to correctly serialize it, eg.:
from django.core import serializers
# assuming obj is a model instance
serialized_obj = serializers.serialize('json', [ obj, ])
share
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Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
...
broken link OR unresponsive site.
– SouravA
Mar 8 '18 at 15:13
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Ruby on Rails: Where to define global constants?
I'm just getting started with my first Ruby on Rails webapp. I've got a bunch of different models, views, controllers, and so on.
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What's the best way to parse command line arguments? [closed]
... more information.
As other people pointed out, you are better off going with optparse over getopt. getopt is pretty much a one-to-one mapping of the standard getopt(3) C library functions, and not very easy to use.
optparse, while being a bit more verbose, is much better structured and simpler t...
Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error
...hases" tab of your target. Normally Xcode does this for you, but sometimes it loses the plot and you need to add the .m file manually.
To do this:
TargetSettings -> Build Phases -> Compile Sources -> add your .m class ->Build and Run
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JsonMappingException: No suitable constructor found for type [simple type, class ]: can not instanti
... getting the following error when trying to get a JSON request and process it:
14 Answers
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How to use Git properly with Xcode?
... been an iphone developer for a while, and I have recently been including git in my workflow. I have used git settings found on http://shanesbrain.net/2008/7/9/using-xcode-with-git for my workflow so far.
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What is a stack trace, and how can I use it to debug my application errors?
Sometimes when I run my application it gives me an error that looks like:
7 Answers
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