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C# - Keyword usage virtual+override vs. new
... false, if you used override it would have printed true.
(Base code taken from Joseph Daigle)
So, if you are doing real polymorphism you SHOULD ALWAYS OVERRIDE. The only place where you need to use "new" is when the method is not related in any way to the base class version.
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vector::at vs. vector::operator[]
... code. If you need to bounds-check at runtime because e.g. the index comes from user input, you're indeed best off with an if statement. So in summary, design your code with the intention that vector::at() will never throw an exception, so that if it does, and your program aborts, it's a sign of a b...
When to choose checked and unchecked exceptions
...d for predictable, but unpreventable errors that are reasonable to recover from.
Unchecked Exceptions should be used for everything else.
I'll break this down for you, because most people misunderstand what this means.
Predictable but unpreventable: The caller did everything within their power t...
Array initialization syntax when not in a declaration
...there, and you have to live with it.
I know how to work around it, but from time to time it would be simpler.
You can write this:
AClass[] array;
...
array = new AClass[]{object1, object2};
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How to force garbage collection in Java?
...n using a nifty little trick with WeakReference objects.
RuntimeUtil.gc() from the jlibs:
/**
* This method guarantees that garbage collection is
* done unlike <code>{@link System#gc()}</code>
*/
public static void gc() {
Object obj = new Object();
WeakRefer...
Twitter bootstrap 3 two columns full height
...idths - then it's probably a better to remove bootstrap's col-md-* classes from the markup because that's not how they are meant to be used.
Codepen demo
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Assignment inside lambda expression in Python
...gned the lambda to fn for clarity (and because it got a little long-ish).
from operator import add
from itertools import ifilter, ifilterfalse
fn = lambda l, pred: add(list(ifilter(pred, iter(l))), [ifilterfalse(pred, iter(l)).next()])
objs = [Object(name=""), Object(name="fake_name"), Object(name=...
Getting name of windows computer running python script?
...
From https://mail.python.org/pipermail/python-list/2006-April/397494.html
import os
os.getenv('COMPUTERNAME')
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How do I speed up the scroll speed in a JScrollPane when using the mouse wheel?
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The value '3' (units to scroll) comes from the system control panel, which Java honours, enabling you to modify it system-wide.
– Luke Usherwood
Aug 5 '16 at 9:59
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Difference between PCDATA and CDATA in DTD
...TA is prepended by a hash in the content model to distinguish this keyword from an element named PCDATA (which would be perfectly legal).
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