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How can I format a decimal to always show 2 decimal places?
...ring formatting
Python 3.6 introduced literal string interpolation (also known as f-strings) so now you can write the above even more succinct as:
>>> f'{pi:.2f}'
'3.14'
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Calling C++ class methods via a function pointer
...mal* pAnimal = (*pNew)();
pAnimal->makeNoise();
return 0;
}
Now although you can normally use a Dog* in the place of an Animal* thanks to the magic of polymorphism, the type of a function pointer does not follow the lookup rules of class hierarchy. So an Animal method pointer is not ...
What is the curiously recurring template pattern (CRTP)?
...ss A : public X<A> {...};
It is curiously recurring, isn't it? :)
Now, what does this give you? This actually gives the X template the ability to be a base class for its specializations.
For example, you could make a generic singleton class (simplified version) like this
template <cl...
What is a regular expression which will match a valid domain name without a subdomain?
...ne seems to be working. What kind of domains won't pass validation do you know?
– Dominic
Apr 24 '12 at 22:13
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How to center a subview of UIView
...ectangle origin and center does fit the same coordinates as it's parent
Now let's try to add subView another SubSubView, and giving subSubview same origin as subView, but make subSubView a child view of subView
We'll add this code:
var subSubView = UIView();
subSubView.frame.origin = subView.fr...
Why are Docker container images so large?
...s base on Alpine.
UPDATE: the official Docker images are based on alpine now so they are good to use now.
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How does Tortoise's non recursive commit work?
...
On 26.08.2011 22:39, Ryan J Ollos wrote:
For several months now I've been seeing the following dialog box appear when
initiating Commit. It frequently happens when attempting to commit following
a merge.
The thing I have noticed lately however is that if I Cancel and ...
The Role Manager feature has not been enabled
... After adding above to web.config roleManager is enabled. But now I am getting exception Unable to connect to SQL Server database
– Irfan Yusanif
Jan 4 '16 at 13:51
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C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?
... your compiled code.
As an example, consider if you tried to use DateTime.Now instead. The value of DateTime.Now changes every time it's executed. Or suppose that TimeSpan.FromSeconds took into account gravity. It's an absurd example but the rules of compile-time constants don't make special cases ...
Why does InetAddress.isReachable return false, when I can ping the IP address?
...am getting failed and using ping I am getting icmp not permitted ? Do you know how to deal with it now ?
– Yuvi
Jan 7 '13 at 8:58
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