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Difference between virtual and abstract methods [duplicate]
...ust be call override in derived class other wise it will give compile-time error
and in virtual you may or may not override it's depend if it's good enough use it
Example:
abstract class twodshape
{
public abstract void area(); // no body in base class
}
class twodshape2 : twodshape
{
p...
Execute bash script from URL
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$ sudo bash <(curl -s xxx) got error: bash: /dev/fd/63: Bad file descriptor
– Jake
Nov 9 '15 at 6:49
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How to avoid Python/Pandas creating an index in a saved csv?
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I cant believe nobody noticed the error. To save to csv, it would be df.to_csv('file.csv', index=False)
– MEdwin
Nov 13 '19 at 10:37
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Changing navigation title programmatically
... ViewController.type does not have a member named title. That's the error I get.
– Rising
Aug 6 '14 at 18:27
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How to change shape color dynamically?
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Does not work. You will get a cast error. Needs a fix or another answer accepted
– ndgreen
Jun 30 '14 at 17:32
6
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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
...TUArray could have helped me, but I didn't like fighting with cryptic type errors and efforts necessary to write polymorphic code with STUArray.
So the problem with Arrays is that they are not well suited for numerical computations. Hmatrix' Data.Packed.Vector and Data.Packed.Matrix are better in t...
Algorithm to compare two images
...he matches and the non matches. If they are within a certain threshold of error, you have a match. Otherwise, you could try reducing the resolution up to a certain point and see if the probability of a match improves.
Regions of Interest
Some images may have distinctive segments/regions of int...
What is the difference between “ is None ” and “ ==None ”
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If you use numpy,
if np.zeros(3)==None: pass
will give you error when numpy does elementwise comparison
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Nodejs - Redirect url
..." url is specific to your application. It could be a simple file not found error or something else if you are doing a RESTful app. Once you've figured that out, sending a redirect is as simple as:
response.writeHead(302, {
'Location': 'your/404/path.html'
//add other headers here...
});
respons...
Is there a function that returns the current class/method name? [duplicate]
...re>) in place of the string. True, it doesn't save you from copy/paste errors where the method reference ends up being valid but its speed makes it quite useful none-the-less.
– bielawski
Feb 20 at 16:07
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