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How should one use std::optional?
...ry_parse_int(std::string s, int& i);
Another way that this could be done is especially bad:
int* try_parse_int(std::string s); //return nullptr if fail
This requires dynamic memory allocation, worrying about ownership, etc. - always prefer one of the other two signatures above.
Another e...
'AND' vs '&&' as operator
...ND and OR, you'll eventually get tripped up by something like this:
$this_one = true;
$that = false;
$truthiness = $this_one and $that;
Want to guess what $truthiness equals?
If you said false... bzzzt, sorry, wrong!
$truthiness above has the value true. Why? = has a higher precedence than a...
ASP.NET: Session.SessionID changes between requests
...
@Cladudio could you just throw in one line of code and your answer is perfect. Interesting information coming out of an interesting question... plus one? ;)
– Seb Nilsson
May 21 '10 at 9:34
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Why do enum permissions often have 0, 1, 2, 4 values?
...d therefore this value does not convey permission to delete).
It allows one to store multiple flags in a single field of bits.
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iOS Safari – How to disable overscroll but allow scrollable divs to scroll normally?
...ve overflow. To block that, use the following event handler instead of the one immediately above (adapted from this question):
$('body').on('touchmove', selScrollable, function(e) {
// Only block default if internal div contents are large enough to scroll
// Warning: scrollHeight support is...
What are the main uses of yield(), and how does it differ from join() and interrupt()?
...riorities of other
threads, the yielding thread can be scheduled back in one interrupt
period later. (See the section on thread scheduling for more
information on timeslices.)
Linux
Under Linux, Hotspot simply calls sched_yield(). The consequences of
this call are a little differen...
How do I create multiple submit buttons for the same form in Rails?
...you will receive params[:a_button] or params[:b_button] depending on which one was pressed.
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MySQL INSERT INTO table VALUES.. vs INSERT INTO table SET
... @Pacerier Such as? The only problem I see is a portability one (which, in many contexts doesn't really matter); am I missing something?
– Mark Amery
Jan 29 '13 at 13:56
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How to get unique device hardware id in Android? [duplicate]
...he unique device ID in Android which cannot be changed when performing a phone reset or OS update?
3 Answers
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How do I create a self-signed certificate for code signing on Windows?
...-signed code-signing certificate (SPC - Software Publisher Certificate) in one go, I prefer to do the following:
Creating a self-signed certificate authority (CA)
makecert -r -pe -n "CN=My CA" -ss CA -sr CurrentUser ^
-a sha256 -cy authority -sky signature -sv MyCA.pvk MyCA.cer
(^ = all...