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When is it right for a constructor to throw an exception?
...hat supports one-stage construction, where the object is fully initialized and usable after construction.
One-stage constructors should throw if they fail to fully initialize the object. If the object cannot be initialized, it must not be allowed to exist, so the constructor must throw.
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Is there any difference between “foo is None” and “foo == None”?
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And you may want to add that the is operator cannot be customized (overloaded by a user-defined class).
– martineau
Dec 17 '10 at 20:28
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Reconnection of Client when server reboots in WebSocket
I am using web socket using PHP5 and the Chrome browser as client.
I have taken the code from the site http://code.google.com/p/phpwebsocket/ .
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Saving enum from select in Rails 4.1
...t;sparkling</option>
</select>
Values went from "0" to "red" and now we're all set.
If you're using a regular ol' rails text_field it's:
f.select :color, Wine.colors.keys.to_a
If you want to have clean human-readable attributes you can also do:
f.select :color, Wine.colors.key...
How to fix “ImportError: No module named …” error in Python?
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Thanks and yes, I had __init__.py. The problem this time was with $PYTHONPATH. Ignacio's solution worked.
– bodacydo
Feb 24 '10 at 13:08
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What is the best way to find the users home directory in Java?
... looking for a snippet of code that can accomplish this for all platforms, and a way to detect the platform.
9 Answers
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How do you embed binary data in XML?
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You could encode the binary data using base64 and put it into a Base64 element; the below article is a pretty good one on the subject.
Handling Binary Data in XML Documents
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Remove All Event Listeners of Specific Type
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That is not possible without intercepting addEventListener calls and keep track of the listeners or use a library that allows such features unfortunately. It would have been if the listeners collection was accessible but the feature wasn't implemented.
The closest thing you can do is to r...
Why must jUnit's fixtureSetup be static?
I marked a method with jUnit's @BeforeClass annotation, and got this exception saying it must be static. What's the rationale? This forces all my init to be on static fields, for no good reason as far as I see.
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Git push branch from one remote to another?
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@patthoyts I tried the mentioned command it says everything up to date, But I have 10 branches in remote A and 6 branches in remote B so can you please tell me how can I move the left out branches?
– Keshav1234
Jan 3 '18 at...