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LINQ to SQL - Left Outer Join with multiple join conditions
...ltiple column joins
from p in context.Periods
join f in context.Facts
on new {
id = p.periodid,
p.otherid
} equals new {
f.id,
f.otherid
} into fg
from fgi in fg.DefaultIfEmpty()
where p.companyid == 100
select f.value
...
Adding n hours to a date in Java?
...Calendar cal = Calendar.getInstance(); // creates calendar
cal.setTime(new Date()); // sets calendar time/date
cal.add(Calendar.HOUR_OF_DAY, 1); // adds one hour
cal.getTime(); // returns new date object, one hour in the future
Check API for more.
...
Push local Git repo to new remote including all branches and tags
I have a local Git repo that I would like to push to a new remote repo (brand new repo set up on Beanstalk, if that matters).
My local repo has a few branches and tags, and I would like to keep all of my history.
...
What's Alternative to Singleton
...ns Gone?
The last article explains in detail how to move the creation of new objects into a factory, so you can avoid using singletons. Worth reading for sure.
In short we move all of the new operators to a factory.
We group all of the objects of similar lifetime into a single factory.
...
Trigger 404 in Spring-MVC controller?
...nd()) {
// whatever
}
else {
throw new ResourceNotFoundException();
}
}
}
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How can I create a two dimensional array in JavaScript?
...
You simply make each item within the array an array.
var x = new Array(10);
for (var i = 0; i < x.length; i++) {
x[i] = new Array(3);
}
console.log(x);
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How do I kill background processes / jobs when my shell script exits?
...
To clean up some mess, trap can be used. It can provide a list of stuff executed when a specific signal arrives:
trap "echo hello" SIGINT
but can also be used to execute something if the shell exits:
trap "killall background" EXIT
It's a builtin, so help trap will give y...
JUnit test for System.out.println()
... System.setXXX is simple:
private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
private final PrintStream originalOut = System.out;
private final PrintStream originalErr = System.err;
@Before
publi...
How does autowiring work in Spring?
... that the context instantiates the objects, not you. I.e. - you never make new UserServiceImpl() - the container finds each injection point and sets an instance there.
In your controllers, you just have the following:
@Controller // Defines that this class is a spring bean
@RequestMapping("/users"...
How to resume Fragment from BackStack if exists
...onCreate(), add
getSupportFragmentManager().addOnBackStackChangedListener(new OnBackStackChangedListener() {
@Override
public void onBackStackChanged() {
Fragment f = getSupportFragmentManager().findFragmentById(R.id.content_frame);
if (f != null){
updateTitleAndDrawer (f);
}...