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C++ “virtual” keyword for functions in derived classes. Is it necessary?
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struct Derived : Base {
virtual void some_func(int) override; // ill-formed - doesn't override a base class method
};
The compiler will issue a compile-time error and the programming error will be immediately obvious (perhaps the function in Derived should have taken a float as the argument)...
STAThread and multithreading
... run in the apartment they were created in.
– 1800 INFORMATION
Oct 3 '08 at 1:44
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A call from a...
Insert current date in datetime format mySQL
...e` (`dateposted`) VALUES (now())");
If you need to use PHP to do it, the format it Y-m-d H:i:s so try
$date = date('Y-m-d H:i:s');
mysql_query("INSERT INTO `table` (`dateposted`) VALUES ('$date')");
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ASP.NET MVC ambiguous action methods
...ches if the key xxx was present in the request." You can also filter by information contained within the route (controllerContext.RequestContext) if that better suits your purposes.
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How to redirect all HTTP requests to HTTPS
...t have access to the main server configuration file, and are obliged to perform this task in a .htaccess file instead.
– Adam
Aug 23 '18 at 11:30
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How can I sharpen an image in OpenCV?
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You can sharpen an image using an unsharp mask. You can find more information about unsharp masking here. And here's a Python implementation using OpenCV:
import cv2 as cv
import numpy as np
def unsharp_mask(image, kernel_size=(5, 5), sigma=1.0, amount=1.0, threshold=0):
"""Return a sha...
What is the purpose of base 64 encoding and why it used in HTTP Basic Authentication?
...ream is too exaggerated. It is better to compare it to storing data in hex format. Because hex would only make x2 more bytes than original stream, and 1s,0s - makes x8 times more bytes. (And Base64 makes x1.3 more data than original byte array). So sometimes it is acceptable to encode binary stream ...
What's the use of Jade or Handlebars when writing AngularJs apps
...remembering that premature optimisation is generally a Bad Thing. Where performance is truly at issue, and you have the server capacity to spare to handle this, server side templating can assist. This applies to products like Twitter and Basecamp, where the cost of doing a lot of server side work is...
What is x after “x = x++”?
...rand before the increment/decrement takes place. (In the case of a Prefix form, the value is the value of the operand after the operation,)
the RHS of an assignment expression is completely evaluated (including any increments, decrements and/or other side-effects) before the value is assigned to th...
SQL variable to hold list of integers
...ase the number of Ids, I get TimeOut error. Maybe cast is hampering the performance.
– User M
Sep 14 '17 at 21:29
Not ...