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How can I use interface as a C# generic type constraint?
...t. This is the default behavior of .NET. For me, this is completely unacceptable.
Prerequirements
We need to have a constraint mechanism, so for the lack of anything better... let's use an attribute. The attribute will be present on top of a generic constraint to check if it matches our conditions...
What is the use of “assert” in Python?
...t True # nothing happens
>>> assert False
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError
Assertions can include an optional message, and you can disable them when running the interpreter.
To print a message if the assertion fails:
ass...
How to find out if you're using HTTPS without $_SERVER['HTTPS']
...PHP as a Fast-CGI application).
Also, Apache 1.x servers (and broken installations) might not have $_SERVER['HTTPS'] defined even if connecting securely. Although not guaranteed, connections on port 443 are, by convention, likely using secure sockets, hence the additional port check.
Additional n...
Troubleshooting “The use statement with non-compound name … has no effect”
...ce this class has no namespace it automatically inherits the global symbol table and so does not need things like this defining, just remove it.
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Delete directory with files in it?
I wonder, what's the easiest way to delete a directory with all its files in it?
33 Answers
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Need to remove href values when printing in Chrome
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Warning: We had issues where a table sometimes lost the last few rows when printing. Turned out that this rule was the culprit, or at least removing it fixed the issue. Do not know why it had that effect.
– Henrik N
M...
Adding images or videos to iPhone Simulator
...pen the Photos app and start populating the library.
If you want a scriptable method, read on.
Note - while this is valid, and works, I think Koen's solution below is now a better one, since it does not require rebooting the simulator.
Identify your simulator by going to xCode->Devices, sele...
How do you access the matched groups in a JavaScript regular expression?
...not very intuitive. This lead to the proposal of the String.prototype.matchAll method. This new method is expected to ship in the ECMAScript 2020 specification. It gives us a clean API and solves multiple problems. It has been started to land on major browsers and JS engines as Chrome 73+ / Node 12+...
Inject errors into already validated form?
...external) process for further processing. This external process can potentially find further errors in the values.
4 Answer...
What is the difference between String.Empty and “” (empty string)?
...ich makes string.Empty more efficient.
In version 2.0 and later of .NET, all occurrences of "" refer to the same string literal, which means "" is equivalent to .Empty, but still not as fast as .Length == 0.
.Length == 0 is the fastest option, but .Empty makes for slightly cleaner code.
See the ...