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What is the best way to use a HashMap in C++?
...iner, almost all implementations include hash_map from the SGI STL in some form or another.
– James McNellis
Aug 26 '10 at 18:27
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What is the purpose of the -m switch?
...gt;):
sys.path is not modified in any way
__name__ is set to the absolute form of <modulename>
__package__ is set to the immediate parent package in <modulename>
__init__.py is evaluated for all packages (including its own for package modules)
__main__.py is not evaluated for package mo...
Why does ReSharper tell me “implicitly captured closure”?
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
How efficient is locking an unlocked mutex? What is the cost of a mutex?
... I forgot the context switches... Context switches are too drain on the performance. If lock acquisition fails and thread has to wait, that is too sort of half of the context switch. CS itself is fast, but since CPU might be used by some other process, the caches would be filled with alien data. Aft...
Is there a MySQL option/feature to track history of changes to records?
...This table will have an entry for each insert, update, and delete query performed on each row in the data table.
The structure of the history table will be the same as the data table it tracks except for three additional columns: a column to store the operation that occured (let's call it 'action'...
Performance optimization strategies of last resort [closed]
There are plenty of performance questions on this site already, but it occurs to me that almost all are very problem-specific and fairly narrow. And almost all repeat the advice to avoid premature optimization.
...
.prop() vs .attr()
... @Neal: Re what makes it different: The source and nature of the information. Look at Tim's value example, for instance. A function called attr that retrieves the property value rather than the attribute "value" doesn't make much sense (and they can be different). Going forward, attr doing a...
What are the mathematical/computational principles behind this game?
...t straightforward in the case of prime order p. Then the integers modulo p form a finite field which can be used to describe coordinates for the points and lines in the plane. There are 3 different kinds of coordinates for points: (1,x,y), (0,1,x), and (0,0,1), where x and y can take on values from ...
How do you detect where two line segments intersect? [closed]
...s. So... do I just divide the z component by the other z component? Is the formula for t actually |(q − p) × s| / |(r × s)|?
– LarsH
Aug 31 '12 at 3:40
7
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How to measure time in milliseconds using ANSI C?
...OCK_MONOTONIC is not implemented on many systems (including many Linux platforms).
– Dipstick
Aug 9 '09 at 9:13
2
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