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How to initialize a private static const map in C++?
... int>’ as ‘this’ argument of ‘std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const key_type&) [with _Key = int; _Tp = int; _Compare = std::less<int>; _Alloc = std::allocator<std::pair<const int, int>...
How to use the “number_to_currency” helper method in the model rather than view?
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It’s not available because its use in a model (typically) violates MVC (and it does seem to in your case). You're taking data and manipulating it for presentation. This, by definition, belongs in the view, not the model.
Here are some solutions:
Use a presenter or view mode...
Write a function that returns the longest palindrome in a given string
... When someone goes on Stack Overflow, the question "answer" should actually contain an answer. Not just a bunch of directions towards the answer..
– Erik Philips
Oct 22 '18 at 17:16
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ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
I have installed Oracle 11g Express Edition Release 2 in my windows 7 64 bit OS and tried to execute JDBC program, then I got the following error:
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Issue with adding common code as git submodule: “already exists in the index”
...itory into place. If that's the case, you can do the following to unstage all of those files:
git rm -r --cached projectfolder
... and then add the submodule with:
git submodule add url_to_repo projectfolder
share
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What is stack unwinding?
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Stack unwinding is usually talked about in connection with exception handling. Here's an example:
void func( int x )
{
char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly de...
Performing Breadth First Search recursively
...tion, but I suppose I could imagine some bizarre scenario where you're not allowed any heap space for some reason [some really bad custom memory manager? some bizarre runtime/OS issues?] while you still have access to the stack...)
Breadth-first traversal traditionally uses a queue, not a stack. T...
Fastest Way of Inserting in Entity Framework
...avingChanges (for each
record)..."
That's the worst thing you can do! Calling SaveChanges() for each record slows bulk inserts extremely down. I would do a few simple tests which will very likely improve the performance:
Call SaveChanges() once after ALL records.
Call SaveChanges() after for e...
Setting an object to null vs Dispose()
...When you write a using statement, it's simply syntactic sugar for a try/finally block so that Dispose is called even if the code in the body of the using statement throws an exception. It doesn't mean that the object is garbage collected at the end of the block.
Disposal is about unmanaged resourc...
nodeJs callbacks simple example
can any one give me a a simple example of nodeJs callbacks, I have already searched for the same on many websites but not able to understand it properly, Please give me a simple example.
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