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How come a non-const reference cannot bind to a temporary object?
...ct,
which function getx() returns? Clearly, this is prohibited by C++ Standard
but I am interested in the purpose of such restriction, not a reference to the standard.
...
What is the best way to check for Internet connectivity using .NET?
What is the fastest and most efficient way to check for Internet connectivity in .NET?
27 Answers
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How to remove item from list in C#?
...s {
public int ID; public string FirstName; public string LastName;
}
and assigned some values to results as follows:
var results=new List<myClass> {
new myClass() { ID=1, FirstName="Bill", LastName="Smith" },
new myClass() { ID=2, FirstName="John", LastName="Wilson" },
new ...
Prefer composition over inheritance?
...this case, it makes sense to extract it out as an interface / class / both and make it a member of both classes.
Update: Just came back to my answer and it seems now that it is incomplete without a specific mention of Barbara Liskov's Liskov Substitution Principle as a test for 'Should I be inher...
What is an optional value in Swift?
...long with Generics) are one of the most difficult Swift concepts to understand. Because of how they are written and used, it's easy to get a wrong idea of what they are. Compare the optional above to creating a normal String:
var name: String = "Bertie" // No "?" after String
From the syntax it loo...
Cluster analysis in R: determine the optimal number of clusters
...rflow.com/q/2018178/1075993. I guess that other graphical methods could be converted to analytical as well.
– Andrey Sapegin
Mar 25 '15 at 9:45
...
How to hide first section header in UITableView (grouped style)
...the result is that drawings are no longer aligned to pixels, causing blurs and reducing performance. Just try it in the simulator: it has an option to highlight problematic alignment.
– Codo
Nov 1 '13 at 17:02
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Easy way to write contents of a Java InputStream to an OutputStream
... but I suspect I'm just missing something which would make my life easier (and the code clearer).
23 Answers
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Should the hash code of null always be zero, in .NET
...the same hash code.
Returning 0 or -1 for null, so long as you choose one and return it all the time, will work. Obviously, non-null hash codes should not return whatever value you use for null.
Similar questions:
GetHashCode on null fields?
What should GetHashCode return when object's identifie...
how does array[100] = {0} set the entire array to 0?
...at don't have a specified value, the compiler initializes pointers to NULL and arithmetic types to zero (and recursively applies this to aggregates).
The behavior of this code in C++ is described in section 8.5.1.7 of the C++ specification (online draft of C++ spec): the compiler aggregate-initial...