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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...g version 4.1):
The @NotNull constraint is defined as:
@Constraint(validatedBy = {NotNullValidator.class})
This class has an isValid method defined as:
public boolean isValid(Object object, ConstraintValidatorContext constraintValidatorContext) {
return object != null;
}
The @NotEmpt...
Android 4.3 Bluetooth Low Energy unstable
... on the Nexus 4). After getting started with the official BLE APIs in Android 4.3, I have noticed that after I connect a device for the first time I am rarely able to successfully connect to / communicate with that device or any other device again.
...
HTTP GET with request body
...ection 9.3:
The GET method means retrieve whatever information ([...]) is identified by the Request-URI.
which states that the request-body is not part of the identification of the resource in a GET request, only the request URI.
Update
The RFC2616 referenced as "HTTP/1.1 spec" is now obsolete. In...
C/C++ Struct vs Class
...r finishing my C++ class it seemed to me the structs/classes are virtually identical except with a few minor differences.
6...
Setting up two different static directories in node.js Express framework
...
It's not possible by one middleware injection, but you can inject static middleware multiple times:
app.configure('development', function(){
app.use(express.static(__dirname + '/public1'));
app.use(express.static(__dirname + '/public2'));
});...
“find: paths must precede expression:” How do I specify a recursive search that also finds files in
...
For some reason single quotes didn't work for me. I had to use double quotes. ¯\_(ツ)_/¯
– Planky
Mar 24 '17 at 21:41
...
Are there any style options for the HTML5 Date picker?
...indicator
So if you thought the date input could use more spacing and a ridiculous color scheme you could add the following:
::-webkit-datetime-edit { padding: 1em; }
::-webkit-datetime-edit-fields-wrapper { background: silver; }
::-webkit-datetime-edit-text { color: red; padding: 0 0.3em; ...
git produces Gtk-WARNING: cannot open display
...this behavior on a RedHat 5 machine where our Git version was 1.7.4.1.
I didn't have a high degree of confidence that unset SSH_ASKPASS wouldn't have unintended consequences, so I wanted to see if there was another solution.
I couldn't tell for certain, but it seems that a patch for this problem w...
XmlWriter to Write to a String Instead of to a File
...
As Richard said, StringWriter is the way forward. There's one snag, however: by default, StringWriter will advertise itself as being in UTF-16. Usually XML is in UTF-8. You can fix this by subclassing StringWriter;
public class Utf8Strin...
Loading Backbone and Underscore using RequireJS
...s (deps), if any, (which may be from the paths configuration, or may be valid paths themselves). (2) (optionally) specify the global variable name from the file you're shimming, which should be exported to your module functions that require it. (If you don't specify the exports, then you'll need to ...