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SQL Server Insert if not exists
...ode
BEGIN
INSERT INTO EmailsRecebidos (De, Assunto, Data)
VALUES (@_DE, @_ASSUNTO, @_DATA)
WHERE NOT EXISTS ( SELECT * FROM EmailsRecebidos
WHERE De = @_DE
AND Assunto = @_ASSUNTO
AND Data = @_DATA);
END
replace with
BEGIN
I...
How to use the CancellationToken property?
...t points where you can stop executing safely across loop body, and loop usually have some logical condition to exit (iterate over all items in collection etc.). So I believe it's better not to mix that conditions as they have different intention.
Cautionary note about avoiding CancellationToken.Thr...
Variable number of arguments in C++?
...u can probably do what you want to do in a safer and simpler way. Technically to use variable number of arguments in C you include stdarg.h. From that you'll get the va_list type as well as three functions that operate on it called va_start(), va_arg() and va_end().
#include<stdarg.h>
int...
Should I use `import os.path` or `import os`?
...ant to use rather than a thing in the os module, so even though it's not really a submodule of a package called os, I import it sort of like it is one and I always do import os.path. This is consistent with how os.path is documented.
Incidentally, this sort of structure leads to a lot of Python p...
Parse error: Syntax error, unexpected end of file in my PHP code
...(or rather fcgi does not) so if your stumped by why this is working on one web server and not another you know why
– Sammaye
Jul 18 '14 at 13:53
...
Undo a merge by pull request?
...erge, but I noticed that it merged in a bunch of commits. So now there are all these commits from this person from days before the merge. How do you undo this?
...
How do I get the base URL with PHP?
... XAMPP on Windows Vista. In my development, I have http://127.0.0.1/test_website/ .
22 Answers
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Cross-reference (named anchor) in markdown
...osing syntax for XHTML, and using the id attribute instead of name.
XHTML allows for any tag to be 'empty' and 'self-closed'. That is, <tag /> is short-hand for <tag></tag>, a matched pair of tags with an empty body. Most browsers will accept XHTML, but some do not. To avoid cros...
How to access accelerometer/gyroscope data from Javascript?
...er registering your event listener (in this case, a JavaScript
function called handleOrientation()), your listener function
periodically gets called with updated orientation data.
The orientation event contains four values:
DeviceOrientationEvent.absolute
DeviceOrientationEvent.al...
How to add a “readonly” attribute to an ?
... The readonly attribute is a "boolean attribute" -- whatwg.org/specs/web-apps/current-work/#boolean-attribute Despite the somewhat misleading name, the values should not be "true" or "false". While I think the code above will actually work (tested in Chrome with jQuery 1.8.1), it can lead to ...