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C++, variable declaration in 'if' expression
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As of C++17 what you were trying to do is finally possible:
if (int a = Func1(), b = Func2(); a && b)
{
// Do stuff with a and b.
}
Note the use of ; of instead of , to separate the declaration and the actual condition.
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Implements vs extends: When to use? What's the difference?
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extends is for extending a class.
implements is for implementing an interface
The difference between an interface and a regular class is that in an interface you can not implement any of the declared methods. Only the class that "implements" the interface can implement the methods. The C++ ...
Best way to extract a subvector from a vector?
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Just use the vector constructor.
std::vector<int> data();
// Load Z elements into data so that Z > Y > X
std::vector<int> sub(&data[100000],&data[101000]);
share
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How can I initialize a C# List in the same line I declare it. (IEnumerable string Collection Example
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It's not quite translated into that, at least not in general. The assignment to the variable happens after all the Add calls have been made - it's as if it uses a temporary variable, with list = tmp; at the end. This can be important if you're reassig...
How do I copy the contents of one stream to another?
...nput.CopyTo(output);
For .NET 3.5 and before
There isn't anything baked into the framework to assist with this; you have to copy the content manually, like so:
public static void CopyStream(Stream input, Stream output)
{
byte[] buffer = new byte[32768];
int read;
while ((read = input...
Difference between String#equals and String#contentEquals methods
... to clarify, the == operator in Java is for checking whether two objects point to the same location in memory, or whether two primitive types (byte, short, int, long, float, double, char, boolean) are equal.
– La-comadreja
Dec 28 '13 at 13:47
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How to sort by two fields in Java?
I have array of objects person (int age; String name;) .
16 Answers
16
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What's the best way to trim std::string?
...(), std::find_if(s.begin(), s.end(),
std::not1(std::ptr_fun<int, int>(std::isspace))));
return s;
}
// trim from end
static inline std::string &rtrim(std::string &s) {
s.erase(std::find_if(s.rbegin(), s.rend(),
std::not1(std::ptr_fun<int, int>(std...
What's the best way to store co-ordinates (longitude/latitude, from Google Maps) in SQL Server?
...T NULL,
[GeographyPoint] AS ([geography]::STGeomFromText(((('POINT('+CONVERT([varchar](20),[Longitude]))+' ')+CONVERT([varchar](20),[Latitude]))+')',(4326)))
)
This gives you the flexibility of spatial queries on the geoPoint column and you can also retrieve the latitude and longitude value...
C# 3.0 auto-properties — useful or not? [closed]
...code? If you want to do stuff in getters or setters, there's no problem to convert them to normal properties later on.
As you said you could use fields, and if you wanted to add logic to them later you'd convert them to properties. But this might present problems with any use of reflection (and pos...