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Does Foreign Key improve query performance?
Suppose I have 2 tables, Products and ProductCategories. Both tables have relationship on CategoryId. And this is the query.
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Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
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console.log([...Array(5).keys()]);
(ES6 credit to nils petersohn and other commenters)
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C++ Const Usage Explanation
...hanged, to an int that cannot be changed: the only difference between this and const int& is that it can be null
const int* const& means a reference to a constant pointer to a constant int. Usually pointers are not passed by reference; const int* & makes more sense because it would mean...
High Quality Image Scaling Library [closed]
...'s a nicely commented Image Manipulation helper class that you can look at and use. I wrote it as an example of how to perform certain image manipulation tasks in C#. You'll be interested in the ResizeImage function that takes a System.Drawing.Image, the width and the height as the arguments.
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Can a unit test project load the target application's app.config file?
...to play around with the .testrunconfig at all.
– Rowland Shaw
Jan 14 '09 at 12:20
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@Rowland if ...
How to remove a key from a Python dictionary?
...y', None)
This will return my_dict[key] if key exists in the dictionary, and None otherwise. If the second parameter is not specified (ie. my_dict.pop('key')) and key does not exist, a KeyError is raised.
To delete a key that is guaranteed to exist, you can also use
del my_dict['key']
This wil...
How to create border in UIButton?
I use custom button in my app named "addButton" and I want to border it with white color how can i get the white color border around my custom button?
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Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
...m is that when you have a macro replacement, the preprocessor will only expand the macros recursively if neither the stringizing operator # nor the token-pasting operator ## are applied to it. So, you have to use some extra layers of indirection, you can use the token-pasting operator with a recurs...
Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
... ${...} . Furthermore, when I started with SpEL I was told to use ${...} and it works fine.
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Resetting a multi-stage form with jQuery
I have a form with a standard reset button coded thusly:
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