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Is key-value observation (KVO) available in Swift?
...subclass:
class Foo: NSObject {
@objc dynamic var bar = 0
}
You can then register to observe changes to the bar property. In Swift 4 and Swift 3.2, this has been greatly simplified, as outlined in Using Key-Value Observing in Swift:
class MyObject {
private var token: NSKeyValueObservati...
Where do the Python unit tests go?
...st way-- I've found-- to run unit tests is to install your library/program then run unit tests with nose. I would recommend virtualenv and virtualenvwrapper to make this a lot easier.
– Cristian
May 16 '09 at 9:27
...
Why is a ConcurrentModificationException thrown and how to debug it
...ently entering the body of the enhanced for loop), modify the Collection, then continue iterating.
To help programmers, some implementations of those Collection classes attempt to detect erroneous concurrent modification, and throw a ConcurrentModificationException if they detect it. However, it is...
Fast stable sorting algorithm implementation in javascript
...n of all the elements.
In your sort condition, if both elements are equal, then you sort by the position.
Tada! You've got a stable sort.
I've written an article about it on my blog if you want to know more about this technique and how to implement it: http://blog.vjeux.com/2010/javascript/javascr...
How do I put a border around an Android textview?
... android:radius="2dp" >
</corners>
</shape>
Then just set it as the background to your TextView:
<TextView
android:id="@+id/textview1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/my_border" ...
Check if a string contains an element from a list (of strings)
...nd add an order of complexity.
update: if you really mean "StartsWith", then you could sort the list and place it into an array ; then use Array.BinarySearch to find each item - check by lookup to see if it is a full or partial match.
...
Why is AJAX returning HTTP status code 0?
...me problem here when using <button onclick="">submit</button>. Then solved by using <input type="button" onclick="">
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Java null check why use == instead of .equals()
...o distinct object instances to be "equal" according to their contract. And then there's the minor detail that since equals is a method, if you try to invoke it on a null reference, you'll get a NullPointerException.
For instance:
class Foo {
private int data;
Foo(int d) {
this.dat...
'0000-00-00 00:00:00' can not be represented as java.sql.Timestamp error
... valid dates. Changing 0000-00-00 to null is not a viable option, because then you can no longer determine if the date was expected to be 0000-00-00 for writing back to the database.
For 0000-00-00, I suggest checking the date value as a string, then changing it to ("y",1), or ("yyyy-MM-dd",0001-0...
How to get jQuery to wait until an effect is finished?
...ading out.
How do I get jQuery to wait until the element had faded out, then remove it?
4 Answers
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