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Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
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First off, let me just say that Jon's answer is correct. This is one of the hairiest parts of the spec, so good on Jon for diving into it head first.
Second, let me say that this line:
An implicit conversion exists from a method group to a compatible delegate type
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What is the relative performance difference of if/else versus switch statement in Java?
...tion's performances, I am wondering which of "if/else" or switch statement is better regarding performance?
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When should std::move be used on a function return value? [duplicate]
In this case
6 Answers
6
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How do you use bcrypt for hashing passwords in PHP?
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bcrypt is a hashing algorithm which is scalable with hardware (via a configurable number of rounds). Its slowness and multiple rounds ensures that an attacker must deploy massive funds and hardware to be able to crack your passwords...
What is stability in sorting algorithms and why is it important?
I'm very curious, why stability is or is not important in sorting algorithms?
10 Answers
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Getting an element from a Set
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There would be no point of getting the element if it is equal. A Map is better suited for this usecase.
If you still want to find the element you have no other option but to use the iterator:
public static void main(String[] args) {
Set<Foo> set = new HashSet<...
Remove an item from a dictionary when its key is unknown
What is the best way to remove an item from a dictionary by value, i.e. when the item's key is unknown? Here's a simple approach:
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Returning unique_ptr from functions
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is there some other clause in the language specification that this exploits?
Yes, see 12.8 §34 and §35:
When certain criteria are met, an implementation is allowed to omit the copy/move construction of a class object ...
Optimistic vs. Pessimistic locking
I understand the differences between optimistic and pessimistic locking. Now could someone explain to me when I would use either one in general?
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return, return None, and no return at all?
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On the actual behavior, there is no difference. They all return None and that's it. However, there is a time and place for all of these.
The following instructions are basically how the different methods should be used (or at least how I was taught they ...