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Why do we need virtual functions in C++?
...rats. Should you overload func() so it takes a Cat*? If you have to derive more animals from Animal they would all need their own func().
The solution is to make eat() from the Animal class a virtual function:
class Animal
{
public:
virtual void eat() { std::cout << "I'm eating g...
Chrome desktop notification example [closed]
...ear automatically after a few seconds
Service Worker notifications - a bit more complicated, but they can work in the background (even after the page is closed), are persistent, and support action buttons
The API call takes the same parameters (except for actions - not available on desktop notific...
How to create REST URLs without verbs?
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@Justice @Breton The more important difference is that PUT is idempotent while POST is not. Usually you should put as much constraints on what you provide as the result as possible. Sticking with PUT gives more information to the client of the se...
Move entire line up and down in Vim
...ine looks like a Vim bug. I put a hack to avoid it. Probably there is some more accurate solution.
Update
There are a lot of unexplained difficulties with just using Vim combinations. These are line missing and extra line jumping.
So here is the scripting solution which can be placed either insid...
Best way to replace multiple characters in a string?
..."
Replacing 17 characters
Here's similar code to do the same but with more characters to escape (\`*_{}>#+-.!$):
def a(text):
chars = "\\`*_{}[]()>#+-.!$"
for c in chars:
text = text.replace(c, "\\" + c)
def b(text):
for ch in ['\\','`','*','_','{','}','[',']','(','...
Best way to store time (hh:mm) in a database
...components of the date, but what's the best way to do this without storing more info than I actually need?
15 Answers
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How do I vertically center text with CSS? [duplicate]
...t the line's height to the same height as the containing box element.
A more versatile approach
This is another way to align text vertically. This solution will work for a single line and multiple lines of text, but it still requires a fixed height container:
div {
height: 100px;
line...
Why are preprocessor macros evil and what are the alternatives?
...in macro that lives in some header file that someone else wrote? [and even more fun if you included that macro before the include - you'd be drowning in strange errors that makes absolutely no sense when you look at the code itself.
Replacement: Well there isn't so much as a replacement as a "rul...
Returning 'IList' vs 'ICollection' vs 'Collection'
...ype. If the result is only going to be iterated, the consumer doesn't need more than that.
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How to call a method defined in an AngularJS directive?
...ar, so my opinion may not hold much weight, but I found this approach much more intuitive than the other answer and would have marked it the correct answer. I implemented this in my sandbox application with zero trouble.
– BLSully
Jan 9 '14 at 17:11
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