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Why do we not have a virtual constructor in C++?
...
Hear it from the horse's mouth. :)
From Bjarne Stroustrup's C++ Style and Technique FAQ Why don't we have virtual constructors?
A virtual call is a mechanism to get work done given partial
information. In particular, "virtual" allows us to call a function
knowing only any interfaces and...
Can't delete virtual device from Eclipse, android
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In Linux/*nix and OSX:
Find the .android folder in your $HOME directory.
In .android there should be a avd folder
In the avd folder should be one or multiple .ini file and a corresponding *.avd virtual device folder.
Delete both the .ini...
Extension method and dynamic object
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To expand on Stecya's answer... extension methods aren't supported by dynamic typing in the form of extension methods, i.e. called as if they were instance methods. However, this will work:
dynamic dList = list;
Console.WriteLine(...
Logging levels - Logback - rule-of-thumb to assign log levels
..., so my answer is biased towards looking at it from a production support standpoint; that said, we assign roughly as follows:
error: the system is in distress, customers are probably being affected (or will soon be) and the fix probably requires human intervention. The "2AM rule" applies here- if...
Is effective C++ still effective?
...t on his own blog
Which may lead you to wonder whether the information and advice in
this pre-C++0x edition of Effective C++ remains relevant. I'm pleased
to report that it does. Surprisingly so, in fact. Having spent nearly
two years steeped in the details of C++0x, I expected to groan a ...
Best way to test for a variable's existence in PHP; isset() is clearly broken
...l scope variables as well, on can do a $defined_vars = get_defined_vars(); and then test via array_key_exists('v', $defined_vars);.
– Henrik Opel
Sep 27 '10 at 16:01
1
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Fastest Way of Inserting in Entity Framework
... for example 100 records.
Call SaveChanges() after for example 100 records and dispose the context and create a new one.
Disable change detection
For bulk inserts I am working and experimenting with a pattern like this:
using (TransactionScope scope = new TransactionScope())
{
MyDbContext con...
Remove all child elements of a DOM node in JavaScript
... will be faster than innerHTML as browsers won't invoke their HTML parsers and will instead immediately replace all children of the element with a single #text node.
doFoo.onclick = () => {
const myNode = document.getElementById("foo");
myNode.textContent = '';
}
<div id='foo' st...
Which HTML5 reset CSS do you use and why? [closed]
Which HTML5 reset CSS do you use and why? Is there one that you've found to cover more cases?
8 Answers
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Different results with Java's digest versus external utilities
... I am using Windows 7 Professional with SP1 . I have tried Java 6.0.29 and Java 7.0.03 . Can someone tell me why I am getting different hash values from Java versus (many!) external utilities and/or websites? Everything external matches with each other, only Java is returning different result...