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How to define @Value as optional
...apparently due to both lack of interest and no clean way of fixing it. See https://github.com/spring-projects/spring-framework/issues/14623 for discussion and some ways to work around it. It's explained in an understandable way by http://www.michelschudel.nl/wp/2017/01/25/beware-of-multiple-spring-p...
Java: random long number in 0
... see @mawaldne's answer), or implement your own nextLong(n).
According to https://docs.oracle.com/javase/1.5.0/docs/api/java/util/Random.html nextInt is implemented as
public int nextInt(int n) {
if (n<=0)
throw new IllegalArgumentException("n must be positive");
if ...
Offset a background image from the right using CSS
... fine.
See Can I use for details on the supported browsers.
Used source: http://tanalin.com/en/blog/2011/09/css3-background-position/
Update:
This feature is now supported in all major browsers, including mobile browsers.
...
What really is a deque in STL?
I was looking at STL containers and trying to figure what they really are (i.e. the data structure used), and the deque stopped me: I thought at first that it was a double linked list, which would allow insertion and deletion from both ends in constant time, but I am troubled by the promise made ...
Controlling maven final name of jar artifact
...figuration of the imported file names via
file mapping:
maven-ear-plugin
http://maven.apache.org/plugins/maven-ear-plugin/examples/customize-file-name-mapping.html
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>...
What predefined macro can I use to detect clang?
...e code. I can easily find predefined macros to check for MSVC or GCC (see http://predef.sourceforge.net/ for example), but I cannot find any macro to check for clang.
...
Pure virtual destructor in C++
... crash.
Edit: fixing the declaration to be more conformant, compiled with http://www.comeaucomputing.com/tryitout/
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java.net.UnknownHostException: Invalid hostname for server: local
...contained whitespace. In writing a proxy server the host was obtained from HTTP headers with the use of split(":") by semicolons for the HOST header. This left whitespace, and causes the UnknownHostException as a host with whitespace is not a valid host. Doing a host = host.trim() on the String host...
Was PreferenceFragment intentionally excluded from the compatibility package?
...sharedprefs manually...ugh.
EDIT:
After trying and looking at the code at http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.0.1_r1/android/preference/PreferenceFragment.java?av=h -- creating my own PreferenceFragment isn't going to happen. It appears the libera...