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How to reference constants in EL?
...ported via ImportHandler#importClass() and be available as ${YourConstants.FOO}.
Note that all java.lang.* classes are already implicitly imported and available like so ${Boolean.TRUE} and ${Integer.MAX_VALUE}. This only requires a more recent Java EE 7 container server as early versions had bugs i...
What is reflection and why is it useful?
...give you a code example of this in Java (imagine the object in question is foo) :
Method method = foo.getClass().getMethod("doSomething", null);
method.invoke(foo, null);
One very common use case in Java is the usage with annotations. JUnit 4, for example, will use reflection to look through your...
Angularjs - ng-cloak/ng-show elements blink
...have the following markup
<ul class="nav">
<li><a href="/foo" ng-cloak>{{bar}}</a></li>
</ul>
and you happen to be using bootstrap.css, the following selector is more specific for your ng-cloak'ed element
.nav > li > a {
display: block;
}
So if you...
Add unique constraint to combination of two columns
...
GO
-- succeeds:
INSERT dbo.Person(Name, Active, PersonNumber)
VALUES(N'foo', 1, 22);
GO
-- succeeds:
INSERT dbo.Person(Name, Active, PersonNumber)
VALUES(N'foo', 0, 22);
GO
-- fails:
INSERT dbo.Person(Name, Active, PersonNumber)
VALUES(N'foo', 1, 22);
GO
Data in the table after all of th...
Can a Windows batch file determine its own file name?
... called the batch file. So, if you are at a prompt in D:\dir1 and enter Y:\foo\bar.bat, if bar.bat has @echo %cd% then it will output D:\dir1.
– Preacher
Jun 28 '18 at 21:56
a...
How to optimize for-comprehensions and loops in Scala?
...imes) {
result = body()
count += 1
}
result
}
def foo() : Int= {
loop(5, 0) {
println("Hi")
return 5
}
}
foo()
This prints "Hi" only once.
Note that the return in foo exits foo (which is what you would expect). Since the bracketed expression is a ...
How can I access and process nested objects, arrays or JSON?
...
const data = {
code: 42,
items: [{
id: 1,
name: 'foo'
}, {
id: 2,
name: 'bar'
}]
};
Let's assume we want to access the name of the second item.
Here is how we can do it step-by-step:
As we can see data is an object, hence we can access its prope...
What are the uses of “using” in C#?
...
using, in the sense of
using (var foo = new Bar())
{
Baz();
}
Is actually shorthand for a try/finally block. It is equivalent to the code:
var foo = new Bar();
try
{
Baz();
}
finally
{
foo.Dispose();
}
You'll note, of course, that the first snippet...
How to set default values in Rails?
...e ActiveRecord Callbacks).
So, IMO it should look something like:
class Foo < ActiveRecord::Base
after_initialize :assign_defaults_on_new_Foo
...
attr_accessible :bar
...
private
def assign_defaults_on_new_Foo
# required to check an attribute for existence to weed out existing ...
Make the current commit the only (initial) commit in a Git repository?
...nity wiki
7 revs, 4 users 73%Fred Foo
3
...