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When to Redis? When to MongoDB? [closed]
...lets you give it a key and look up a single value. Redis itself can store strings, lists, hashes, and a few other things; however, it only looks up by name.
Cache invalidation is one of computer science's hard problems; the other is naming things. That means you'll use Redis when you want to avoi...
How do I clear the std::queue efficiently?
...anyway when getting destroyed. So the accepted answer is O(n) plus it does extra allocations and initializations for brand new queue.
– Shital Shah
Dec 2 '16 at 1:08
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How to “return an object” in C++?
...ll probably optimize the call to the copy constructor, so there will be no extra overhead. (Like dreamlax pointed out in the comment).
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Django: Set foreign key using integer?
...at the purpose of the above optimisation, but I would prefer an accidental extra query to being incorrect. So be careful, only use this when you are finished working on your instance (eg employee).
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Most efficient way to cast List to List
...return statement, it is apparently fine to use it on an assignment, so the extra "result" variable solves this problem. (It should be optimized away either by the compiler or by the JIT anyway.)
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How do I programmatically “restart” an Android app?
...urClass.class);
intent.addFlags(FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(KEY_RESTART_INTENT, nextIntent);
context.startActivity(intent);
if (context instanceof Activity) {
((Activity) context).finish();
}
Runtime.getRuntime().exit(0);
}
Which is used in the ProcessPh...
Migrating from JSF 1.2 to JSF 2.0
...ribute of the @ManagedBean, then it will default to classname with the 1st char lowercased.
@ManagedBean
@RequestScoped
public class SomeBean {}
In this particular example, it will be #{someBean}.
Any <managed-property> can be annotated using @ManagedProperty:
@ManagedProperty("#{otherBe...
You can't specify target table for update in FROM clause
...le, so the safest bet is to force you to specify what will happen using an extra table.
– siride
Mar 9 '13 at 20:54
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JPanel Padding in Java
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or you can have some extra padding arround the existing border: p.setBorder(BorderFactory.createCompoundBorder(new EmptyBorder(10, 10, 10, 10), new EtchedBorder()));
– Synox
Apr 22 '13 at 8:42
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python pip: force install ignoring dependencies
...hon packaging tools: distutils, setuptools, pip. Setuptools (and pip) has "extras", but they must be explicitly selected and installed by the user.
– shadowtalker
Oct 18 '18 at 19:51
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