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Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
Regarding this .NET unhandled em>x m>ception message:
5 Answers
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What is the difference between inversedBy and mappedBy?
I am developing my application using Zend Framework 2 and Doctrine 2.
4 Answers
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Does const mean thread-safe in C++11?
I hear that const means thread-safe in C++11 . Is that true?
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Can you remove elements from a std::list while iterating through it?
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You have to increment the iterator first (with i++) and then remove the previous element (e.g., by using the returned value from i++). You can change the code to a while loop like so:
std::list<item*>::iterator i = items.begin();
whil...
Javascript web app and Java server, build all in Maven or use Grunt for web app?
...lication with AngularJS and we like the idea of using Bower for Dependency Management and Grunt for building, running tests etc. ( Yeoman )
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How to append tem>x m>t to a tem>x m>t file in C++?
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You need to specify the append open mode like
#include <fstream>
int main() {
std::ofstream outfile;
outfile.open("test.tm>x m>t", std::ios_base::app); // append instead of overwrite
outfile << "Data";
return 0;
}
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What is the difference between Collection and List in Java?
...alized Collection, however.
A Collection is just that: a collection of items. You can add stuff, remove stuff, iterate over stuff and query how much stuff is in there.
A List adds the information about a defined sequence of stuff to it: You can get the element at position n, you can add an element...
What is a magic number, and why is it bad? [closed]
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A magic number is a direct usage of a number in the code.
For em>x m>ample, if you have (in Java):
public class Foo {
public void setPassword(String password) {
// don't do this
if (password.length() > 7) {
throw new InvalidArgumentEm>x m>ception("password")...
How to declare a structure in a header that is to be used by multiple files in c?
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if this structure is to be used by some other file func.c how to do it?
When a type is used in a file (i.e. func.c file), it must be visible. The very worst way to do it is copy paste it in each source file needed it.
The right way is putting it in an header fil...
Why does casting int to invalid enum value NOT throw em>x m>ception?
If I have an enum like so:
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