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Polymorphism vs Overriding vs Overloading
... public void goPee(){
System.out.println("Sit Down");
}
}
Now we can tell an entire room full of Humans to go pee.
public static void main(String[] args){
ArrayList<Human> group = new ArrayList<Human>();
group.add(new Male());
group.add(new Female());
//...
How to edit log message already committed in Subversion?
... +1 for giving the command directly :-) apache.org was down right now and I couldn't follow any given link...
– Rafa
Jan 10 '11 at 16:23
...
Mercurial for Beginners: The Definitive Practical Guide
...commit Mercurial will cease tracking it in this and future commits.
? - Unknown. The file is not currently tracked by Mercurial. Committing will have no effect on it unless you use hg add to add it.
! - Missing. The file was tracked but Mercurial cannot find it in the working copy.
To see the c...
How do lexical closures work?
...
There is one problem with this solution: func has now two parameters. That means it doesn't work with a variable amount of parameters. Worse, if you call func with a second parameter this will overwrite the original i from the definition. :-(
– Pascal
...
Git submodule inside of a submodule (nested submodules)
...
As Sridhar comments below, from Git1.6.5+, git clone --recursive is now the official alternative, described in:
"git clone --submodule"
"Retrospectively add --recursive to a git repo"
(with the alias $ git config --global alias.cloner = 'clone --recursive', which avoids shadowing the norma...
What is the garbage collector in Java?
...ated in the previous iteration is not being used anymore -- that object is now considered "garbage".
Eventually, we'll start getting a lot of garbage, and memory will be used for objects which aren't being used anymore. If this keeps going on, eventually the Java Virtual Machine will run out of spa...
Why should a function have only one exit-point? [closed]
...y a single exit point - you have a single path through the method and you know where to look for the exit. On the minus side if you use indentation to represent nesting, your code ends up massively indented to the right, and it becomes very difficult to follow all the nested scopes.
Another is that...
.prop('checked',false) or .removeAttr('checked')?
With the introduction of the prop method, now I need to know the accepted way of unchecking a checkbox. Is it:
4 Answers
...
Capturing Groups From a Grep RegEx
... use grep multiple times within a pipeline to first reduce your line to a known format, and then to extract just the bit you want. (Although tools like cut and sed are far better at this).
Suppose for the sake of argument that your pattern was a bit simpler: [0-9]+_([a-z]+)_ You could extract this ...
When should we use intern method of String on String literals
...ing on the Java implementation. It's best done when you're dealing with a known reasonable number of Strings with many duplications.
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