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What is the meaning of the prefix N in T-SQL statements and when should I use it?
...ing is in Unicode
(the N actually stands for National language character set). Which
means that you are passing an NCHAR, NVARCHAR or NTEXT value, as
opposed to CHAR, VARCHAR or TEXT.
To quote from Microsoft:
Prefix Unicode character string constants with the letter N. Without
the N pr...
how to permit an array with strong parameters
...>["", "2"],
Therefore, when declaring strong parameters, I explicitly set category_ids to be an array
params.require(:question).permit(:question_details, :question_content, :user_id, :accepted_answer_id, :province_id, :city, :category_ids => [])
Works perfectly now!
(IMPORTANT: As @Lenar...
Super-simple example of C# observer/observable with delegates
...
@Dinah: That doesn't avoid the null check. You can still set SomethingHappened = null later (a handy if lazy and non-ideal way of unsubscribing all handlers), so the null check is always necessary.
– Dan Puzey
Dec 2 '13 at 16:33
...
How do I trap ctrl-c (SIGINT) in a C# console app
...wait until ctrl-c,
// not doing anything, see the answer using set-reset events.
}
Console.WriteLine("exited gracefully");
}
}
The difference between this code and the first example is that e.Cancel is set to true, which means the execution continues after the deleg...
How to find duplicates in 2 columns not 1
...
You should set up a composite key between the two fields. This will require a unique stone_id and upcharge_title for each row.
As far as finding the existing duplicates try this:
select stone_id,
upcharge_title,
c...
Simplest way to do a recursive self-join?
... concept of CTE recursion
DECLARE
@startDate DATETIME,
@endDate DATETIME
SET @startDate = '11/10/2011'
SET @endDate = '03/25/2012'
; WITH CTE AS (
SELECT
YEAR(@startDate) AS 'yr',
MONTH(@startDate) AS 'mm',
DATENAME(mm, @startDate) AS 'mon',
DATEPART(d,@startDa...
How to use cURL to get jSON data and decode the data?
...l_init();
// Will return the response, if false it print the response
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Set the url
curl_setopt($ch, CURLOPT_URL,$url);
// Execute
$result=curl_exec($ch);
// Closing
curl_close($ch);
// Will dump a beauty json :3
var_dump(json_decode($result, true));...
How to add global ASP.Net Web Api Filters?
... Can someone explain what's going on here? Why are there two sets of Global filters? Doesn't that make 'Global' an oxymoron?
– Luke Puplett
Jun 27 '12 at 9:55
6
...
What is the significance of initializing direction arrays below with given values when developing ch
... central point, X, at 2,2.)
.....
.536.
.1X0.
.724.
.....
The way it is set up, if you do ^1 (^ being bitwise XOR) on the index you get the opposite direction - 0 and 1 are opposites, 2 and 3 are opposites and so on. (Another way to set it up is to go clockwise starting at north - then ^4 gets yo...
How are VST Plugins made?
...ugin is just a bundle with the .vst extension, though there are also a few settings which must be configured correctly in order to generate a valid plugin. You can also download a set of Xcode VST plugin project templates I made awhile back which can help you to write a working plugin on that platf...