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Why would a static nested interface be used in Java?
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@Pacerier: no. More precisely, you can load the class and inspect its members, but cannot instantiate it or call methods on it without using setAccessible(true). In other words it is visible, but not accessible, via reflection. But if the n...
Is 0 a decimal literal or an octal literal?
... point being that a decimal-literal is a nonzero-digit followed by zero or more digit so there is no ambiguity.
– CB Bailey
Aug 1 '11 at 7:53
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Windows batch: sleep [duplicate]
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Execute command without keeping it in history [closed]
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Correct. For more details the OP should have a look at HISTCONTROL and HISTIGNORE in the bash man page.
– u-punkt
Dec 12 '11 at 11:02
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MySQL, better to insert NULL or empty string?
...NULL you can distinguish between "put no data" and "put empty data".
Some more differences:
A LENGTH of NULL is NULL, a LENGTH of an empty string is 0.
NULLs are sorted before the empty strings.
COUNT(message) will count empty strings but not NULLs
You can search for an empty string using a bound...
Join/Where with LINQ and Lambda
...'re familiar with SQL syntax, using the LINQ query syntax is much clearer, more natural, and makes it easier to spot errors:
var id = 1;
var query =
from post in database.Posts
join meta in database.Post_Metas on post.ID equals meta.Post_ID
where post.ID == id
select new { Post = post, ...
Why are variables “i” and “j” used for counters?
... That's a good question. I actually think that "i" might come from integer more than index. I also think it's easy to write on a chalkboard. Back in the 70's we were cautioned to be sure that we wrote our "i" and "j" in a perfectly distinctive manner. Indeed, we were told to draw our "i" exactly ...
Practical uses for AtomicInteger
...r unique-indexing), without having to resort to synchronizing all access.
More complex synchronization-free logic can be employed by using compareAndSet() as a type of optimistic locking - get the current value, compute result based on this, set this result iff value is still the input used to do t...
Choosing the best concurrency list in Java [closed]
...ntions.
That said, are you sure you need it to be a List? There are a lot more options for concurrent Queues and Maps (and you can make Sets from Maps), and those structures tend to make the most sense for many of the types of things you want to do with a shared data structure.
For queues, you hav...
How do you update Xcode on OSX to the latest version?
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