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dealloc in Swift
...still present in the case of non-weakly zeroing reference observers. Block based observers via the -[NSNotificationCenter addObserverForName:object:queue:usingBlock] method still need to be un-registered when no longer in use since the system still holds a strong reference to these observers. Removi...
Count(*) vs Count(1) - SQL Server
..._GUID() in Oracle is quite computation intensive function.
In my test database, t_even is a table with 1,000,000 rows
This query:
SELECT COUNT(SYS_GUID())
FROM t_even
runs for 48 seconds, since the function needs to evaluate each SYS_GUID() returned to make sure it's not a NULL.
However, t...
Find nearest latitude/longitude with an SQL query
I have latitude and longitude and I want to pull the record from the database, which has nearest latitude and longitude by the distance, if that distance gets longer than specified one, then don't retrieve it.
...
How would I run an async Task method synchronously?
...t all my data access code is in async fashion. I needed to build a sitemap based on the sitemap and the third party library I was using was MvcSitemap. Now when one is extending it via the DynamicNodeProviderBase base class, one cannot declare it as a async method. Either I had to replace with a new...
GCC compile error with >2 GB of code
... of such offsets
write an evaluator which accepts the array above and the base addresses of the structure pointers and produces an result
The array+evaluator will represent the same logic as one of your functions, but only the evaluator will be code. The array is "data" and can be either generate...
How to Get the Title of a HTML Page Displayed in UIWebView?
...So we have the HTML code, now how do we get the title? Well, in every html-based doc the title is signaled by This Is the Title
So probably the easiest thing to do is to search that htmlCode string for , and for , and substring it so we get the stuff in between.
//so let's create two strings th...
Add subdomain to localhost URL
...specific domain and test things that way. For instance, if you have a UNIX-based operating system, open (as root) the file /etc/hosts and add a line (or lines) like this:
127.0.0.1 example.com
127.0.0.1 subdomain.example.com
Your computer will now treat both example.com and subdomain.exampl...
PHPMailer character encoding issues
...roblematic with UTF-8 data. To fix this you can do:
$mail->Encoding = 'base64';
Take note that 'quoted-printable' would probably work too in these cases (and maybe even 'binary'). For more details you can read RFC1341 - Content-Transfer-Encoding Header Field.
...
How To: Best way to draw table in console app (C#)
...n now find and improve the following code in github!
I wrote this class based on some ideas here. The columns width is optimal, an it can handle object arrays with this simple API:
static void Main(string[] args)
{
IEnumerable<Tuple<int, string, string>> authors =
new[]
{
...
How do I force Postgres to use a particular index?
...g you're asking about the common "index hinting" feature found in many databases, PostgreSQL doesn't provide such a feature. This was a conscious decision made by the PostgreSQL team. A good overview of why and what you can do instead can be found here. The reasons are basically that it's a performa...