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Determine if map contains a value for a key?
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Does something along these lines exist?
No. With the stl map class, you use ::find() to search the map, and compare the returned iterator to std::map::end()
so
map<int,Bar>::iterator it = m.find('2');
Bar b3;
if(it ...
In Scala, what exactly does 'val a: A = _' (underscore) mean?
What exactly does val a: A = _ initialize a value to? Is this a typed null? Thanks.
2 Answers
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CryptographicException 'Keyset does not exist', but only through WCF
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This is most likely because the IIS user doesn't have access to the private key for your certificate. You can set this by following these steps...
Start -> Run -> MMC
File -> Add/Remove Snapin
Add the Certificates Snap In
Select Computer Account, then hit...
How does java do modulus calculations with negative numbers?
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This doesn't work good if n is negative. If you user same example from Java 7 Lang Spec (Section 15.17.3): (-5) % (-3) = -2. Adding -3 will not work. You should add absolute value of n if you want to be sure that value is positive...
How does PHP 'foreach' actually work?
Let me prefix this by saying that I know what foreach is, does and how to use it. This question concerns how it works under the bonnet, and I don't want any answers along the lines of "this is how you loop an array with foreach ".
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Why does datetime.datetime.utcnow() not contain timezone information?
Why does this datetime not have any timezone info given that it is explicitly a UTC datetime ?
9 Answers
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How does the Amazon Recommendation feature work?
...p in recommendations, etc.
Now I have no inside knowledge of how Amazon does business (never worked there) and all I'm doing is talking about classical approaches to the problem of online commerce - I used to be the PM who worked on data mining and analytics for the Microsoft product called Comme...
What does the term “porcelain” mean in Git?
The term "porcelain" appears occasionally in the Git documentation. What does it mean?
9 Answers
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Does Javascript pass by reference? [duplicate]
Does Javascript pass by references or pass by values? Here is an example from Javascript: The Good Parts . I am very confused about my parameter for the rectangle function. It is actually undefined , and redefined inside the function. There are no original reference. If I remove it from the func...
What does {0} mean when initializing an object?
When {0} is used to initialize an object, what does it mean? I can't find any references to {0} anywhere, and because of the curly braces Google searches are not helpful.
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