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Logger slf4j advantages of formatting with {} instead of string concatenation
... if it is needed or not (the traditional "is debugging enabled" test known from log4j), and should be avoided if possible, as the {} allows delaying the toString() call and string construction to after it has been decided if the event needs capturing or not. By having the logger format a single stri...
Cannot change column used in a foreign key constraint
.... This means your foreign key disallows changing the type of your field."
From MySQL 5.5 Reference Manual: FOREIGN KEY Constraints
Corresponding columns in the foreign key and the referenced key must
have similar internal data types inside InnoDB so that they can be
compared without a type ...
Percentage Height HTML 5/CSS
...f padding, and the content will expand to fill the container. Long article from 2009 on this subject: http://alistapart.com/article/creating-intrinsic-ratios-for-video
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Is it possible to make a type only movable and not copyable?
...eating a new allocation, and then semantically copying each stored element from the old to the new. These can be deep copies (e.g. Vec<T>) or shallow (e.g. Rc<T> doesn't touch the stored T), Clone is loosely defined as the smallest amount of work required to semantically copy a value of ...
How does Task become an int?
...g. return async result; (in the same way that await result "unwraps" the T from the Tast<T>).
– dav_i
Nov 18 '13 at 14:31
...
How to set a Timer in Java?
... Took too long!
}
catch (final ExecutionException e) {
// An exception from within the Runnable task
}
finally {
service.shutdown();
}
This will execute normally with exceptions if the task completes within 2 minutes. If it runs longer than that, the TimeoutException will be throw.
One i...
What are the mechanics of short string optimization in libc++?
...YOUT which rearranges the data members such that the "long layout" changes from:
struct __long
{
size_type __cap_;
size_type __size_;
pointer __data_;
};
to:
struct __long
{
pointer __data_;
size_type __size_;
size_type __cap_;
};
The motivation for this change is t...
How to track down log4net problems
...
I changed from C:\tmp\log4net.txt to C:\log4net.txt, then it can generate text file.
– Frank Myat Thu
Jun 29 '17 at 7:15
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Sequence contains more than one element
...
-1 "The problem is you are using SingleOrDefault" - from what I can gather the OP is looking for a customer id which (I assume) should be unique, therefore, SingleOrDefault is actually more appropriate than FirstOrDefault. Also, this has actually raised a more serious problem ...
IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
...
Somehow the JDK language jars were removed from the classpath. All I had to do was reapply the JSDK home path.
Goto:
File -> Project Structure -> Platform Settings -> SDKs
Re-apply the JSDK home path.
Doing this added about 15 jars to the classpath. Appar...