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What is the difference between a var and val definition in Scala?
...B(n: Int) {
val value = new A(n)
}
object Test {
def main(args: Array[String]) {
val x = new B(5)
x = new B(6) // Doesn't work, because I can't replace the object created on the line above with this new one.
x.value = new A(6) // Doesn't work, because I can't replace the object assi...
What does LINQ return when the results are empty
... the following ToList() will throw an exception or just a empty List<string> if nothing found in IEnumerable result?
...
Best practices for overriding isEqual: and hash
...iplying the result by each variable hash your result will overflow. eg. [NSString hash] creates large values. If you have 5+ variables it's easy to overflow with this algorithm. It'll result in everything mapping to the same hash, which is bad. See my response: stackoverflow.com/a/4393493/276626
...
The import org.junit cannot be resolved
...ask how to run the Java class if it doesn't have a public static void main(String[] args)
– Luiggi Mendoza
Feb 27 '13 at 6:30
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Do NSUserDefaults persist through an Update to an app in the Appstore?
...a, NSUserDefaults is the best way to save data such as preferences, dates, strings etc. If you are looking to save images and files, the file system is a better bet.
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How to remove element from an array in JavaScript?
...Benefits of this function is that you can use it on complex array not just string and number.
Some examples :
Remove first element :
// Not very useful but it works
function removeFirst(element, index) {
return index > 0;
}
var arr = [1,2,3,5,6].filter(removeFirst); // [2,3,4,5,6]
Rem...
How to select the last record of a table in SQL?
...
to get the last row of a SQL-Database use this sql string:
SELECT * FROM TableName WHERE id=(SELECT max(id) FROM TableName);
Output:
Last Line of your db!
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How to randomly pick an element from an array
...ould define a method for doing so (Source Avinash R in Random element from string array):
import java.util.Random;
public class RandArray {
private static Random rand = new Random();
private static <T> T randomFrom(T... items) {
return items[rand.nextInt(items.length)];
...
jQuery's .click - pass parameters to user function
...f the functionality introduced in version 1.4.3 of the jQuery click event handler.
It allows you to pass a data map to the event object that automatically gets fed back to the event handler function by jQuery as the first parameter. The data map would be handed to the .click() function as the first...
How to merge a specific commit in Git
...build process takes advantage of git ancestry to automatically set version strings based on the latest tag (using git describe).
Instead of cherry-pick, you can do an actual git merge --no-commit, and then manually adjust the index to remove any changes you don't want.
Suppose you're on branch A a...