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Missing Push Notification Entitlement
...then before submitting the app tap the arrow beside the "(X) Entitlements" string to expand the entitlements and see the value of the keychain-access-group entitlement.
Archive your app and attempt to submit it to the point of getting to the final "Submit" button. You should see this app was now bui...
How do I get the object if it exists, or None if it does not exist?
...go will raise the DoesNotExist exception every time.
The idiomatic way to handle this in python is to wrap it in a try catch:
try:
go = SomeModel.objects.get(foo='bar')
except SomeModel.DoesNotExist:
go = None
What I did do, is to subclass models.Manager, create a safe_get like the code a...
How do I tell Maven to use the latest version of a dependency?
...sion numbers - if you do not conform to a strict pattern Maven compares as strings and not numbers.
– Thorbjørn Ravn Andersen
Feb 25 '13 at 13:19
...
Java Set retain order?
...
Furthermore, due to the different String hashing in Java 8, the default (unsorted) ordering in Sets and Maps will change. If you rely on unsorted ordering, your code will behave differently under Java 8.
– rustyx
Nov 17 ...
vector::at vs. vector::operator[]
...y require it. (Microsoft pre-2010 was a bit of a problem here, since std::string didn't always work if the checking options didn't correspond with those of the runtime: -MD, and you'd better turn off checking, -MDd, and you'd better have it on.)
– James Kanze
...
When would you use a WeakHashMap or a WeakReference?
...xProvider MUTEX_PROVIDER = new IdMutexProvider();
public void performTask(String resourceId) {
IdMutexProvider.Mutex mutext = MUTEX_PROVIDER.getMutex(resourceId);
synchronized (mutext) {
// look up the resource and do something with it
}
}
IdMutextProvider provides id-based ob...
Large, persistent DataFrame in pandas
...
what if the values are strings or categorical - i am getting the error: incompatible categories in categorical concat
– As3adTintin
Jun 22 '15 at 17:26
...
What is the correct value for the disabled attribute?
...lse value.
If the attribute is present, its value must either be the empty string or a value that is an ASCII case-insensitive match for the attribute's canonical name, with no leading or trailing whitespace.
Conclusion:
The following are valid, equivalent and true:
<input type="text" disabled /...
How can I select every other line with multiple cursors in Sublime Text?
... moment to comment on the answer above.
You can use the following search string with the regex turned on, and then press alt+enter. Followed by a left arrow. This would put a cursor each on alternate lines (same steps as explained by Joe Daley)
^.*\n.*$
...
Does a finally block always get executed in Java?
...
Example code:
public static void main(String[] args) {
System.out.println(Test.test());
}
public static int test() {
try {
return 0;
}
finally {
System.out.println("finally trumps return.");
}
}
Output:
finally trumps retur...