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What's the best way to inverse sort in scala?
...way of changing the sign, if you sort by some numeric value
list.sortBy(- _.size)
More generally, sorting may be done by method sorted with an implicit Ordering, which you may make explicit, and Ordering has a reverse (not the list reverse below)
You can do
list.sorted(theOrdering.reverse)
If...
Android: When should I use a Handler() and when should I use a Thread?
... create a thread pool unless you use ThreadPoolExecutor or ExecutorService API.
(Taken this query from your comments on Blackbelt answer)
Why not use an Executor? and even if I did want to use a Handler to do that, how?
Reference : Thread Performance article
Ther
How to get current location in Android [duplicate]
...acker.getLongitude();
}
also check if your emulator runs with Google API
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How do you explicitly set a new property on `window` in TypeScript?
...2, no need for .d.ts file as mentioned above
– tanguy_k
Sep 3 '17 at 20:29
6
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How do I fix PyDev “Undefined variable from import” errors?
...ncing the same issue with latest Eclipse and PyDev. I can navigate between all modules, so why code-analysis can't do the same?
– Adam
Sep 3 '14 at 11:41
3
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Correct way to use get_or_create?
...f the fields have to be included in defaults. In case CREATE event occurs, all the fields are taken into consideration.
It looks like you need to be returning into a tuple, instead of a single variable, do like this:
customer.source,created = Source.objects.get_or_create(name="Website")
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How do you use variables in a simple PostgreSQL script?
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This doesn't answer the question at all. In MS SQL you can define a var in a query and use it right there, in the same tool. I don't get why people keep proposing this as an answer, in every version of this question.
– stone
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JPA EntityManager: Why use persist() over merge()?
...ed (any changes you make will not be part of the transaction - unless you call merge again). You can through use returned instance (managed one).
Maybe a code example will help.
MyEntity e = new MyEntity();
// scenario 1
// tran starts
em.persist(e);
e.setSomeField(someValue);
// tran ends, an...
form_for but to post to a different action
... Check it out in the official docs by searching for action: (action colon) api.rubyonrails.org/classes/ActionView/Helpers/…
– user664833
Feb 20 '14 at 23:12
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How to call a parent class function from derived class function?
...disambiguate it by adding the base class's name followed by two colons base_class::foo(...). You should note that unlike Java and C#, C++ does not have a keyword for "the base class" (super or base) since C++ supports multiple inheritance which may lead to ambiguity.
class left {
public:
void f...