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Different types of thread-safe Sets in Java
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1) The CopyOnWriteArraySet is a quite simple implementation - it basically has a list of elements in an array, and when changing the list, it copies the array. Iterations and other accesses which are running at this time continue with the old array, avoiding necessity of synchronization between...
Why is Java Vector (and Stack) class considered obsolete or deprecated?
... each individual operation. That's almost never what you want to do.
Generally you want to synchronize a whole sequence of operations. Synchronizing individual operations is both less safe (if you iterate over a Vector, for instance, you still need to take out a lock to avoid anyone else changing t...
Does this app use the Advertising Identifier (IDFA)? - AdMob 6.8.0
...it Ad Tracking.
Including Limit Ad Tracking. This is what the last box is all about. So you must check the that box if you use AdMob. If you use other SDK I strongly recommend checking if they respect the guidelines as well.
Since I run only ads (Google AdMob), I checked the first (Serve ads...) a...
Download the Android SDK components for offline install
Is it possible to download the Android SDK components for offline install without using the SDK Manager?
The problem is I am behind a firewall which I have no control over and both sites download URLs seem to be blocked (throws a connection refused exception)
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What does the PHP error message “Notice: Use of undefined constant” mean?
...l_escape_string($_POST['message']);
As is, it was looking for constants called department, name, email, message, etc. When it doesn't find such a constant, PHP (bizarrely) interprets it as a string ('department', etc). Obviously, this can easily break if you do defined such a constant later (tho...
How to create a jQuery plugin with methods?
... plugin that will provide additional functions/methods to the object that calls it. All the tutorials I read online (have been browsing for the past 2 hours) include, at the most, how to add options, but not additional functions.
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efficient way to implement paging
...irect paging in the SQL engine.
Giving you an example, I have a db table called mtcity and I wrote the following query (work as well with linq to entities):
using (DataClasses1DataContext c = new DataClasses1DataContext())
{
var query = (from MtCity2 c1 in c.MtCity2s
select c1)...
Constructor in an Interface?
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but note that the use case @Sebi describes (calling overloaded methods from parent constructors) is a bad idea as explained in my answer.
– rsp
May 10 '10 at 15:57
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How to delete a file via PHP?
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Check your permissions first of all on the file, to make sure you can a) see it from your script, and b) are able to delete it.
You can also use a path calculated from the directory you're currently running the script in, eg:
unlink(dirname(__FILE__) . "/...
How to dynamically create CSS class in JavaScript and apply?
I need to create a CSS stylesheet class dynamically in JavaScript and assign it to some HTML elements like - div, table, span, tr, etc and to some controls like asp:Textbox, Dropdownlist and datalist.
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