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Google Guava isNullOrEmpty for collections
...as empty, then get all that ambiguity out of the way up front, like this:
Set<Foo> foos = NaughtyClass.getFoos();
if (foos == null) {
foos = ImmutableSet.of();
}
or like this (if you prefer):
Set<Foo> foos = MoreObjects.firstNonNull(
NaughtyClass.getFoos(), ImmutableSet.<Foo...
Why use a ReentrantLock if one can use synchronized(this)?
...he constructor for this class accepts an optional fairness parameter. When set true, under contention, locks favor granting access to the longest-waiting thread. Otherwise this lock does not guarantee any particular access order. Programs using fair locks accessed by many threads may display lower o...
Using only CSS, show div on hover over
... one to the other.
Maybe this isn't useful for a great deal, but I had to set my revealed div to overflow: auto, so sometimes it had scroll bars, which couldn't be used as soon as you move away from the div.
In fact, after finally working out how to make the revealed div, (although it is now a chi...
What is Ad Hoc Query?
...
An Ad-hoc query is one created to provide a specific recordset from any or multiple merged tables available on the DB server. These queries usually serve a single-use purpose, and may not be necessary to incorporate into any stored procedure to run again in the future.
Ad-hoc sce...
How to assign Profile values?
... {
get { return ((string)(base["FullName"])); }
set { base["FullName"] = value; Save(); }
}
// add additional properties here
}
}
To set a profile value:
AccountProfile.CurrentUser.FullName = "Snoopy";
To get a profile value
string x = AccountPro...
event.preventDefault() function not working in IE
...rking (probably because of the point below), so this will fail.
Even if I set returnValue property directly to false:
$('a').on('click', function(event) {
event.returnValue = false;
event.preventDefault();
});
This also won't work, because I just set some property of jQuery custom event ...
Admob Error in Eclipse for android:configChanges
...f the Android SDK and that you're compiling against at least Android v3.2 (set target in default.properties to android-13).
have a look here: https://developers.google.com/admob/android/quick-start
So I think your tools version is not updated to at least Version 13.
...
Spring Cache @Cacheable - not working while calling from another method of the same bean
...at the service level:
@Service
@Transactional(readOnly=true)
public class SettingServiceImpl implements SettingService {
@Inject
private SettingRepository settingRepository;
@Inject
private ApplicationContext applicationContext;
@Override
@Cacheable("settingsCache")
public String findValue(Strin...
Spring MVC: How to perform validation?
...e validation errors, result.hasErrors() will be true.
Note : You can also set the validator in a @InitBinder method of the controller, with "binder.setValidator(...)" (in which case a mix use of method 1 and 2 would not be possible, because you replace the default validator). Or you could instantia...
Cannot use a CONTAINS or FREETEXT predicate on table or indexed view because it is not full-text ind
...you to dig out your installer and go screwing around with your environment settings. Well done!
– Christine
Jan 11 '17 at 18:57
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