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“Comparison method violates its general contract!”
...at I got when I Googled this error, my problem was that I had
if (value < other.value)
return -1;
else if (value >= other.value)
return 1;
else
return 0;
the value >= other.value should (obviously) actually be value > other.value so that you can actually return 0 with equal obj...
CSS: center element within a element
...
.right {
margin:auto 0 auto auto;
background-color:yellow;
}
<div id="parent">
<div id="child1" class="block center">
a block to align center and with text aligned left
</div>
<div id="child2" class="block left">
a block to align ...
Twig for loop for arrays with keys
...
There's this example in the SensioLab page on the for tag:
<h1>Members</h1>
<ul>
{% for key, user in users %}
<li>{{ key }}: {{ user.username|e }}</li>
{% endfor %}
</ul>
http://twig.sensiolabs.org/doc/tags/for.html#iterating-over-...
Ruby class instance variable vs. class variable
... @things
end
def things
self.class.things
end
end
class Child < Parent
@things = []
end
Parent.things << :car
Child.things << :doll
mom = Parent.new
dad = Parent.new
p Parent.things #=> [:car]
p Child.things #=> [:doll]
p mom.things #=> [:car]
p dad.thing...
A std::map that keep track of the order of insertion?
I currently have a std::map<std::string,int> that stores an integer value to an unique string identifier, and I do look up with the string. It does mostly what I want, except for that it does not keep track of the insertion order. So when I iterate the the map to print out the values, they a...
Android AlertDialog Single Button
...only has one button that says OK or Done or something, instead of the default yes and no.
Can that be done with the standard AlertDialog, or would I have to use something else?
...
When should I use a List vs a LinkedList
...ould not be an accepted answer. As I was
learning I did some tests and felt like sharing them.
Original answer...
I found interesting results:
// Temporary class to show the example
class Temp
{
public decimal A, B, C, D;
public Temp(decimal a, decimal b, decimal c, decimal d)
{
...
Java Generics: Cannot cast List to List? [duplicate]
...de = a1.get(0);
What would you expect to happen?
You can do this:
List<DataNode> a1 = new ArrayList<DataNode>();
List<? extends Tree> b1 = a1;
... because then you can only fetch things from b1, and they're guaranteed to be compatible with Tree. You can't call b1.add(...) pre...
Conveniently Declaring Compile-Time Strings in C++
...ulate strings during compile-time in C++ has several useful applications. Although it is possible to create compile-time strings in C++, the process is very cumbersome, as the string needs to be declared as a variadic sequence of characters, e.g.
...
Passing Parameters JavaFX FXML
...erences to the domain objects.
This blog (by another writer) provides an alternate, but similar, example.
Setting a Controller on the FXMLLoader
CustomerDialogController dialogController =
new CustomerDialogController(param1, param2);
FXMLLoader loader = new FXMLLoader(
getClass().getReso...