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Receiver not registered exception error?
...on. In your case you need to just put special try/catch for this exception and ignore it (assuming you can't or don't want to control number of times you call unregisterReceiver on the same recevier).
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MVC4 DataType.Date EditorFor won't display date value in Chrome, fine in Internet Explorer
I'm using the DataType.Date attribute on my model and an EditorFor in my view. This is working fine in Internet Explorer 8 and Internet Explorer 9 , but in Google Chrome it is showing a date picker and instead of displaying the value it just displays "Month/Day/Year" in faded gray text.
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Left align and right align within div in Bootstrap
What are some of the common ways to left align some text and right align some other text within a div container in bootstrap?
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Adding :default => true to boolean in existing Rails column
... that you would have to create a rake task or just go in the rails console and update all the records (which I would not recommend in production).
When you added t.boolean :show_attribute, :default => true to the create_profiles migration, it's expected that it didn't do anything. Only migrations...
Which access modifiers are implied when not specified?
...oncepts that support access modifiers, such as fields, properties, methods and classes, which access modifiers are implied if not specified?
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What does 'wb' mean in this code, using Python?
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File mode, write and binary. Since you are writing a .jpg file, it looks fine.
But if you supposed to read that jpg file you need to use 'rb'
More info
On Windows, 'b' appended to the mode
opens the file in binary mode, so
there ar...
How do you push a tag to a remote repository using Git?
...on introduced in Git 1.8.3:
git push --follow-tags
It pushes both commits and only tags that are both:
annotated
reachable (an ancestor) from the pushed commits
This is sane because:
you should only push annotated tags to the remote, and keep lightweight tags for local development to avoid tag c...
NULL vs nil in Objective-C
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nil should only be used in place of an id, what we Java and C++ programmers would think of as a pointer to an object. Use NULL for non-object pointers.
Look at the declaration of that method:
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
change:(NSDi...
JPA: unidirectional many-to-one and cascading delete
...cade REMOVE operations so that EntityManager.remove will remove the parent and the children. You can also specify orphanRemoval as true, to delete any orphaned children when the child entity in the parent collection is set to null, i.e. remove the child when it is not present in any parent's collect...
Hash Map in Python
... The second example just builds a dict in the same ways as before and then copies it. The other use dict, which would be more appopriate in this context, is dict(key1=value1, key2=value2, ...) but that requires the keys to strings which are also valid Python identifiers (and internally, thi...