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When should I use Kruskal as opposed to Prim (and vice versa)?
...m.co.uk/showthread.php?t=232168.
Kruskal's algorithm will grow a solution from the cheapest edge by adding the next cheapest edge, provided that it doesn't create a cycle.
Prim's algorithm will grow a solution from a random vertex by adding the next cheapest vertex, the vertex that is not current...
How to share my Docker-Image without using the Docker-Hub?
...kerfile creates a layer. You can also create layers by using docker commit from the command line after making some changes (via docker run probably).
These layers are stored by default under /var/lib/docker. While you could (theoretically) cherry pick files from there and install it in a different ...
What is the use of “ref” for reference-type variables in C#?
...value, by reference (ref), and by output (out).
Here's an important quote from that page in relation to ref parameters:
Reference parameters don't pass the
values of the variables used in the
function member invocation - they use
the variables themselves. Rather than
creating a new stor...
Good example of livelock?
...
Doesn't getOwner method have to be synchronized as well? From Effective Java "synchronization has no effect unless both read and write".
– Sanghyun Lee
May 30 '15 at 12:11
...
usr/bin/ld: cannot find -l
...ry is not a dynamic one (.so) but a static one (.a). Does the problem come from that?
– ZoOo
May 23 '13 at 9:41
3
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Checking if a string is empty or null in Java [duplicate]
...
@DavidS If you remove str == null from code and str variable is 'null', then it will throw 'NullPointerException'.
– Alfaz Jikani
Jan 17 at 13:18
...
Android ListView headers
...ms) {
super(context, 0, items);
mInflater = LayoutInflater.from(context);
}
@Override
public int getViewTypeCount() {
return RowType.values().length;
}
@Override
public int getItemViewType(int position) {
return getItem(position).getViewType...
Fully backup a git repo?
...l-to-repo.git
Then when you want to refresh the backup: git remote update from the clone location.
This backs up all branches and tags, including new ones that get added later, although it's worth noting that branches that get deleted do not get deleted from the clone (which for a backup may be a ...
When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext)
...yContextHolder under the hood but abstracts away that singleton-like class from my code. I've found no way to do this other than rolling my own interface, like so:
public interface SecurityContextFacade {
SecurityContext getContext();
void setContext(SecurityContext securityContext);
}
No...
Checking if an object is null in C#
...f course you want to use them ...)
For not null use if (obj is object) and from C# 9 you can also use if (obj is not null)
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