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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...
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 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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delegate keyword vs. lambda notation
...hread.Sleep(5000);
return 2712;
});
mytask.ContinueWith(delegate
{
_backgroundTask.ContinueTask(() =>lblPercent.Content = mytask.Result.ToString(CultureInfo.InvariantCulture));
});
And I replace with lambda:(error)
var mytask = Task.Factory.StartNew(() =>
{
Thread.Sleep(5000)...
Why doesn't os.path.join() work in this case?
... some kind of a reference point like
os.environ['HOME'] or os.path.dirname(__file__).
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Generating a PNG with matplotlib when DISPLAY is undefined
...'/matplotlibrc (as an example, seehttp://matplotlib.org/faq/troubleshooting_faq.html#locating-matplotlib-config-dir). See also matplotlib.org/users/customizing.html, which has an example config file at the bottom of the page. Find "agg" on that page and you'll see the config option you need.
...