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How to get error message when ifstream open fails
...ilure:
std::ifstream f;
//prepare f to throw if failbit gets set
std::ios_base::iostate exceptionMask = f.exceptions() | std::ios::failbit;
f.exceptions(exceptionMask);
try {
f.open(fileName);
}
catch (std::ios_base::failure& e) {
std::cerr << e.what() << '\n';
}
e.what(), ho...
Filtering a list of strings based on contents
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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WCF vs ASP.NET Web API [closed]
... of the concepts have changed).
WCF was originally created to enable SOAP-based services. For simpler RESTful or RPCish services (think clients like jQuery) ASP.NET Web API should be good choice.
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Interfaces vs. abstract classes [duplicate]
...ement/inherit from your interface/abstract class, but inherit from another base class, use an interface.
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Haskell offline documentation?
...S]
Commands:
[search] Perform a search
data Generate Hoogle databases
server Start a Hoogle server
combine Combine multiple databases into one
convert Convert an input file to a database
test Run tests
dump Dump sections of a database to stdout
rank Gener...
Any reason to prefer getClass() over instanceof when generating .equals()?
...rticularly important because most of the collections (HashTable, etc.) are based on the equals method. If you put a member of the super class in a hash table as the key and then look it up using a subclass instance, you won't find it, because they are not equal.
See also this SO answer.
Effective...
SHA512 vs. Blowfish and Bcrypt [closed]
...whole hasn't had as much scrutiny as Blowfish itself, I believe that being based on a cipher with a well-understood structure gives it some inherent security that hash-based authentication lacks. Also, it is easier to use common GPUs as a tool for attacking SHA-2–based hashes; because of its memor...
Priority queue in .Net [closed]
...ult)
{
}
public MaxHeap(Comparer<T> comparer)
: base(comparer)
{
}
public MaxHeap(IEnumerable<T> collection, Comparer<T> comparer)
: base(collection, comparer)
{
}
public MaxHeap(IEnumerable<T> collection) : base(collecti...
Replace a value in a data frame based on a conditional (`if`) statement
In the R data frame coded for below, I would like to replace all of the times that B
appears with b .
8 Answers
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Static and Sealed class differences
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Sort've interesting to think of other types, based of this. Like some root class that can be inherited and instantiated, but can't inherit. Not sure why that'd be useful, but still
– AustinWBryan
May 20 '18 at 3:41
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