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Java: notify() vs. notifyAll() all over again
...notifyAll() " then a lot of explanations will pop up (leaving apart the javadoc paragraphs). It all boils down to the number of waiting threads being waken up: one in notify() and all in notifyAll() .
...
What are the applications of binary trees?
...ng is that n-ary trees are more complex, but usually provide no real speed advantage.
In a (balanced) binary tree with m nodes, moving from one level to the next requires one comparison, and there are log_2(m) levels, for a total of log_2(m) comparisons.
In contrast, an n-ary tree will require log...
How to use Git Revert
...ed empty Git repository in /tmp/example/.git/
$ echo "Initial text" > README.md
$ git add README.md
$ git commit -m "initial commit"
[master (root-commit) 3f7522e] initial commit
1 file changed, 1 insertion(+)
create mode 100644 README.md
$ echo "bad update" > README.md
$ git commit -am "ba...
Should services always return DTOs, or can they also return domain models?
...ere else" then the service layer needs to reference that "somewhere else", adding a new layer to your lasagna.
is it ok to return domain models all the way to controllers, or should we always use DTOs for communication with service layer?
A DTO is a response/request object, it makes sense if y...
Should I use Java date and time classes or go with a 3rd party library like Joda Time?
...cleaner than Joda Time, in my view. However, if you're stuck pre-Java-8, read on...
Max asked for the pros and cons of using Joda...
Pros:
It works, very well. I strongly suspect there are far fewer bugs in Joda than the standard Java libraries. Some of the bugs in the Java libraries are really ...
Why do we need boxing and unboxing in C#?
...u don't care about having int represent their underlying value (i.e., instead have int be reference types too and just store a reference to their underlying value) then you don't need boxing.
where should I use it.
For example, the old collection type ArrayList only eats objects. That is, it o...
Why is it necessary to set the prototype constructor?
...ype.copy = function() {
// return new Person(this.name); // just as bad
return new this.constructor(this.name);
};
// define the Student class
function Student(name) {
Person.call(this, name);
}
// inherit Person
Student.prototype = Object.create(Person.prototype);
Now wh...
How to set a Default Route (To an Area) in MVC
...
This one interested me, and I finally had a chance to look into it. Other folks apparently haven't understood that this is an issue with finding the view, not an issue with the routing itself - and that's probably because your question title indicates that it's a...
What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
...e seen that the DI approach allows easy testability for the application by adding an abstraction layer over the creation of application components. There is one problem with this approach: it doesn't play well with visual designers such as Microsoft Expression Blend.
The problem is that in both nor...
MongoDB: Combine data from multiple collections into one..how?
...to flatten the users_comments collection so it's one document per comment, additionally run this:
var map, reduce;
map = function() {
var debug = function(value) {
var field;
for (field in value) {
print(field + ": " + value[field]);
}
};
debug(this);...