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What do all of Scala's symbolic operators mean?
...ou just have to know where to look for them. Or, failing that, look at the index (presently broken on 2.9.1, but available on nightly).
Every Scala code has three automatic imports:
// Not necessarily in this order
import _root_.java.lang._ // _root_ denotes an absolute path
import _root_.sca...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
...ows 7. However it doesn't appear to work in Internet Explorer 9 at least.
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<!-- Suppress browser request for favicon.ico -->
<link rel="shortcut icon"type="image/x-...
What is a NullReferenceException, and how do I fix it?
...mbers = null;
int n = numbers[0]; // numbers is null. There is no array to index.
Array Elements
Person[] people = new Person[5];
people[0].Age = 20 // people[0] is null. The array was allocated but not
// initialized. There is no Person to set the Age for.
Jagged Arrays
long[][...
Is there a performance difference between i++ and ++i in C++?
... iterator would need to maintain some state, e.g. parent node, child node, index and stuff like that. All in all, my stance is, even if only few examples exist, ...
– Sebastian Mach
Jun 7 '15 at 20:16
...
Relationship between SciPy and NumPy
... contain nothing but the array data type and
the most basic operations: indexing, sorting, reshaping, basic
elementwise functions, et cetera. All numerical code would reside in
SciPy. However, one of NumPy’s important goals is compatibility, so NumPy
tries to retain all features supported...
CSS 3 slide-in from left transition
...function() {
$('.slide-in').toggleClass('show');
});
.slide-in {
z-index: 10; /* to position it in front of the other content */
position: absolute;
overflow: hidden; /* to prevent scrollbar appearing */
}
.slide-in.from-left {
left: 0;
}
.slide-in.from-right {
right: 0;
...
What is “lifting” in Scala?
...2,3).lift(22).getOrElse(-1)
Int = -1
This shows a neat approach to avoid index out of bounds exceptions.
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Is there a way to instantiate objects from a string holding their class name?
...ble: http://www.boost.org/doc/libs/1_54_0/libs/functional/factory/doc/html/index.html
My preference though is to generate wrapper classes which hide the mapping and object creation mechanism. The common scenario I encounter is the need to map different derived classes of some base class to keys, wh...
List or IList [closed]
... that can be addressed the same way as a linear array T[] using an integer index. When you specify IList<T> as the type of the method's argument, you only specify that you need certain capabilities of the container.
For example, the interface specification does not enforce a specific data st...
Why Func instead of Predicate?
...;T>, Func<T, int, bool>)
That allows you to filter based on the index of the entry as well. That's nice and consistent, whereas:
Where<T>(IEnumerable<T>, Predicate<T>)
Where<T>(IEnumerable<T>, Func<T, int, bool>)
wouldn't be.
...