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In C++, is it still bad practice to return a vector from a function?
... Guidelines.
Let's compare:
std::vector<int> BuildLargeVector1(size_t vecSize) {
return std::vector<int>(vecSize, 1);
}
with:
void BuildLargeVector2(/*out*/ std::vector<int>& v, size_t vecSize) {
v.assign(vecSize, 1);
}
Now, suppose we need to call these methods ...
To ARC or not to ARC? What are the pros and cons? [closed]
...ake a little more thinking about to do correctly. Fancy handling of ObjC va_args can also cause trouble. Most things involving math on an ObjC pointer is trickier. You shouldn't have much of this in any case.
You cannot put an id in a struct. This is fairly rare, but sometimes it's used to pack data...
Could not load file or assembly Microsoft.SqlServer.management.sdk.sfc version 11.0.0.0
...stall it, and restart visual studio.
PS: You may need install DB2OLEDBV5_x64.msi or DB2OLEDBV5_x86.msi too.
Problem: (Sql server 2012) This issue happens when assembly Microsoft.SqlServer.management.sdk.sfc version 11.0.0.0 not found by visual studio.
Solution: just go to http://www.microsoft.c...
Replace input type=file by an image
...ch would act exactly as an input type file (show the dialog box, and same $_FILE on submitted page).
I found some workaround here , and this interesting one too (but does not work on Chrome =/).
...
Accessing MP3 metadata with Python [closed]
...ecific tag versions can be selected:
tag.link("/some/file.mp3", eyeD3.ID3_V2)
tag.link("/some/file.mp3", eyeD3.ID3_V1)
tag.link("/some/file.mp3", eyeD3.ID3_ANY_VERSION) # The default.
Or you can iterate over the raw frames:
tag = eyeD3.Tag()
tag.link("/some/file.mp3")
for frame in tag.fra...
Find difference between timestamps in seconds in PostgreSQL
...
Try:
SELECT EXTRACT(EPOCH FROM (timestamp_B - timestamp_A))
FROM TableA
Details here: EXTRACT.
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Why use 'virtual' for class properties in Entity Framework model definitions?
...nternally the code looks more like this:
public ICollection<RSVP> get_RSVPs()
{
return _RSVPs;
}
public void set_RSVPs(RSVP value)
{
_RSVPs = value;
}
private RSVP _RSVPs;
That's why they're marked as virtual for use in the Entity Framework, it allows the dynamically created classe...
How can I export tables to Excel from a webpage [closed]
...ar">lfrtip',
"oTableTools": {
"sSwfPath": "/swf/copy_cvs_xls_pdf.swf"
}
} );
} );
So, quick to deploy, no browser limitations, no server-side language required, and most of all very EASY to understand. It's a win-win. The one thing it does have limits on, thoug...
How to write LaTeX in IPython Notebook?
...from IPython.display import display, Math, Latex
display(Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx'))
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How to allow to accept only image files?
...e or not.
Check if image file is an actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
}
else {
echo "F...