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Covariance and contravariance real world example
...IEnumerable<Teacher> GetTeachers() { ... }
}
public class PersonNameComparer : IComparer<Person>
{
public int Compare(Person a, Person b)
{
if (a == null) return b == null ? 0 : -1;
return b == null ? 1 : Compare(a,b);
}
private int Compare(string a, s...
Phase • Animations made easy! - Extensions - Kodular Community
... });
}
Kodular Community
Phase • Animations made easy!
Extensions
...
How to fix: “UnicodeDecodeError: 'ascii' codec can't decode byte”
... new Unicode string. The Markdown authors can't know the encoding of the incoming string so will rely on you to decode strings to Unicode strings before passing to Markdown.
Unicode strings can be declared in your code using the u prefix to strings. E.g.
>>> my_u = u'my ünicôdé strįng...
Is there any advantage of using map over unordered_map in case of trivial keys?
... RA: You can somewhat control that with your own allocator type combined with any container, if you think it matters for any particular program.
– Roger Pate
Feb 4 '10 at 3:51
...
How do I create a right click context menu in Java Swing?
...e menu. That can cause some nasty buggy behavior in the menu.
The show(Component, int x, int x) method handles all of the things you need to happen, (Highlighting things on mouseover and closing the popup when necessary) where using setVisible(true) just shows the menu without adding any additio...
What is a Y-combinator? [closed]
A Y-combinator is a computer science concept from the “functional” side of things. Most programmers don't know much at all about combinators, if they've even heard about them.
...
Why is my Git Submodule HEAD detached from master?
...many times my submodule head gets detached from master branch.
This is a common case when one does not use submodules too often or has just started with submodules. I believe that I am correct in stating, that we all have been there at some point where our submodule's HEAD gets detached.
Cause...
Is Fortran easier to optimize than C for heavy calculations?
...
The languages have similar feature-sets. The performance difference comes from the fact that Fortran says aliasing is not allowed, unless an EQUIVALENCE statement is used. Any code that has aliasing is not valid Fortran, but it is up to the programmer and not the compiler to detect these erro...
R and version control for the solo data analyst
... are the backups saved in? Are they in the same physical location as your computer?
How easy is it to restore a given version of a single file from your backup system?
For example, have a Mac and use Time Machine to backup to another hard drive in my computer. Time Machine is great for recoverin...
Setting up FTP on Amazon Cloud Server [closed]
...ftpd conf file again by typing:
> sudo vi /etc/vsftpd/vsftpd.conf
Un-comment out the line:
chroot_local_user=YES
It should look like this once you're done:
Restart the vsftpd server again like so:
> sudo /etc/init.d/vsftpd restart
All done!
Appendix A: Surviving a reboot
vsftp...