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Why should I declare a virtual destructor for an abstract class in C++?
I know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
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Change priorityQueue to max priorityqueue
... +1;
if (lhs.equals(rhs)) return 0;
return -1;
}
});
Now, the priority queue will reverse all its comparisons, so you will get the maximum element rather than the minimum element.
Hope this helps!
shar...
Custom HTTP headers : naming conventions
...ng application protocols to support both names (E.g, x-gzip & gzip are now equivalent). So, the official recommendation is to just name them sensibly without the "X-" prefix.
Update 2: On June 2012, the deprecation of recommendation to use the "X-" prefix has become official as RFC 6648. Belo...
C++ Dynamic Shared Library on Linux
...ass* instead? I'm not asking you to change this for me, I'd just like to know if there's a reason to use one over the other.
– Bill the Lizard
Jan 30 '09 at 21:05
1
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Random row selection in Pandas dataframe
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With pandas version 0.16.1 and up, there is now a DataFrame.sample method built-in:
import pandas
df = pandas.DataFrame(pandas.np.random.random(100))
# Randomly sample 70% of your dataframe
df_percent = df.sample(frac=0.7)
# Randomly sample 7 elements from your dat...
What is an application binary interface (ABI)?
... Libraries are full of code and other resources, but your program has to know how to locate what it needs inside the library file. Your ABI defines how the contents of a library are stored inside the file, and your program uses the ABI to search through the file and find what it needs. If everyth...
How to parse the AndroidManifest.xml file inside an .apk package
...n the device. (There are fields whose purpose I don't understand, if you know what they mean, tell me, I'll update the info.)
// decompressXML -- Parse the 'compressed' binary form of Android XML docs
// such as for AndroidManifest.xml in .apk files
public static int endDocTag = 0x00100101;
publi...
Pretty print in MongoDB shell as default
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Now: how do you print it from external javascript loaded into Mongo? This will not work...
– Witold Kaczurba
May 13 '19 at 6:46
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Best way to parse RSS/Atom feeds with PHP [closed]
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Note that eregi_replace is now deprecated and has been replaced with preg_replace as well as eregi with preg_match. Documentations can be found here and here respectively.
– ITS Alaska
Jun 25 '13 at 18:31
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Which commit has this blob?
...t is so simple. Just by making the reasonable assumption that the path is known. However, one should know that it returns the commit where the path was changed to the given hash.
– Unapiedra
Jul 21 '17 at 19:16
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