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Difference between validate(), revalidate() and invalidate() in Swing GUI
Swing components have multiple methods related to updates of screen layout, in particular:
2 Answers
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What is PEP8's E128: continuation line under-indented for visual indent?
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PEP-8 recommends you indent lines to the opening parentheses if you put anything on the first line, so it should either be indenting to the opening bracket:
urlpatterns = patterns('',
url(r'^$', listing, name=...
ModelState.AddModelError - How can I add an error that isn't for a property?
...fvm){...} to see if the fvm.prop1 and fvm.prop2 already exist in that combination; if so, I want to add an error to the modelstate, then return the whole view. I tried:
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How to implement the Android ActionBar back button?
...arent activity in the AndroidManifest.xml file
<activity android:name="com.example.ServicesViewActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.ParentActivity" />
</activity>
See here for further reading.
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Which characters are valid/invalid in a JSON key name?
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What is the difference between `after_create` and `after_save` and when to use which?
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Pull request without forking?
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GitHub has a good guide about that: help.github.com/articles/creating-a-pull-request
– Ryan Bigg
Jan 5 '15 at 3:29
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Template default arguments
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@Pubby I suppose it would create some unnecessary complications if Foo might be a template identifier or might be an explicit instantiation depending on whether there's a default argument. Better keep the explicit instantiation syntax. Think of it like a function foo with a ...
Using the RUN instruction in a Dockerfile with 'source' does not work
... Eh? If you source a script inside a shell that only exists for the command, it's not able to have a lasting effect on any future commands run, assuming that the sum total of its action is setting environment variables. So why would you use source at all, vs just bash /usr/local/bin/virtualen...
How to disable code formatting for some part of the code using comments?
...Style
You can change the formatter control markers, as long as they're in comments.
Ensure formatter markers in comments are enabled, as shown in the following figure:
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