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g++ undefined reference to typeinfo
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One possible reason is because you are declaring a virtual function without defining it.
When you declare it without defining it in the same compilation unit, you're indicating that it's defined somewhere else - this means t...
What's the algorithm to calculate aspect ratio?
...",gcd(1024,768));
}
And here's some complete HTML/Javascript which shows one way to detect the screen size and calculate the aspect ratio from that. This works in FF3, I'm unsure what support other browsers have for screen.width and screen.height.
<html><body>
<script type="tex...
PDO support for multiple queries (PDO_MYSQL, PDO_MYSQLND)
I do know that PDO does not support multiple queries getting executed in one statement. I've been Googleing and found few posts talking about PDO_MYSQL and PDO_MYSQLND.
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What is the main difference between PATCH and PUT request?
... difference between PATCH and PUT requests are, and when we should use one or the other.
8 Answers
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Is it possible to GROUP BY multiple columns using MySQL?
Is it possible to GROUP BY more than one column in a MySQL SELECT query? For example:
7 Answers
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How to detect which one of the defined font was used in a web page?
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I've seen it done in a kind of iffy, but pretty reliable way. Basically, an element is set to use a specific font and a string is set to that element. If the font set for the element does not exist, it takes the font of the parent element...
How to get the filename without the extension from a path in Python?
...Note: If the filename has multiple dots, only the extension after the last one is removed. For example:
import os
print(os.path.splitext("/path/to/some/file.txt.zip.asc")[0])
Prints:
/path/to/some/file.txt.zip
See other answers below if you need to handle that case.
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Close and Dispose - which to call?
...sposing a WCF Service I am wondering for classes such as SqlConnection or one of the several classes inheriting from the Stream class does it matter if I close Dispose rather than Close?
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Alternate FizzBuzz Questions [closed]
...east be able to give the idea behind how to do something.
Using this test one of my previous bosses saw everything from people who aced it all pretty quick, to people who could do most pretty quick, to one guy who couldn't answer a single one after a half hour.
I should also note: he let people us...
How does one reorder columns in a data frame?
How would one change this input (with the sequence: time, in, out, files):
11 Answers
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