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When saving, how can you check if a field has changed?
...erson(models.Model):
name = models.CharField()
__original_name = None
def __init__(self, *args, **kwargs):
super(Person, self).__init__(*args, **kwargs)
self.__original_name = self.name
def save(self, force_insert=False, force_update=False, *args, **kwargs):
...
PHP Error handling: die() Vs trigger_error() Vs throw Exception
...
The first one should never be used in production code, since it's transporting information irrelevant to end-users (a user can't do anything about "Cannot connect to database").
You throw Exceptions if you know that at a certain criti...
Why does a return in `finally` override `try`?
...urnState;
}
}
Generally speaking you never want to have more than one return statement in a function, things like this are why.
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When to use extern in C++
...es the header knows about it, but you only need to “define” it once in one of your source files.
To clarify, using extern int x; tells the compiler that an object of type int called x exists somewhere. It's not the compilers job to know where it exists, it just needs to know the type and name s...
How do I create a transparent Activity on Android?
...he following style in your res/values/styles.xml file (if you don’t have one, create it.) Here’s a complete file:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Theme.Transparent" parent="android:Theme">
<item name="android:windowIsTranslucent">tru...
Android “Only the original thread that created a view hierarchy can touch its views.”
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One brief comment on this. I had a separate thread that was trying to modify the UI, and the above code worked, but I had call runOnUiThread from the Activity object. I had to do something like myActivityObject.runOnUiThrea...
IntelliJ: Viewing diff of all changed files between local and a git commit/branch
...now been implemented. In order to compare two branches you do:
Check out one of the branches you want to compare with.
Select the branch you want to compare with in the Git branch popup in the status bar in the bottom right of the IntelliJ window. A popup with some options is shown.
Select the "Co...
Constructor overloading in Java - best practice
There are a few topics similar to this, but I couldn't find one with a sufficient answer.
6 Answers
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Comparison between Mockito vs JMockit - why is Mockito voted better than JMockit? [closed]
...tools for
Java which also overcome the
limitations of the conventional ones,
between them PowerMock, jEasyTest, and
MockInject. The one that comes closest
to the feature set of JMockit is
PowerMock, so I will briefly evaluate
it here (besides, the other two are
more limited and don't...
Facebook API - How do I get a Facebook user's profile image through the Facebook API (without requir
... specify the picture size you want with the type argument, which should be one of square (50x50), small (50 pixels wide, variable height), normal (100 pixels wide, variable height), and large (about 200 pixels wide, variable height)" Via Graph API on Facebook
– user603284
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