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Regular Expression to match only alphabetic characters
...z]+$/
to match an input string of ASCII alphabets.
[A-Za-z] will match all the alphabets (both lowercase and uppercase).
^ and $ will make sure that nothing but these alphabets will be matched.
Code:
preg_match('/^[A-Z]+$/i', "abcAbc^Xyz", $m);
var_dump($m);
Output:
array(0) {
}
Test cas...
How to “perfectly” override a dict?
...or other builtins) directly. It often makes no sense, because what you actually want to do is implement the interface of a dict. And that is exactly what ABCs are for.
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Simple state machine example in C#?
...ate machines with a GetNext function to return the next state deterministically, and a MoveNext function to mutate the state machine.
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Symfony2 : How to get form validation errors after binding the request to the form
... May 24 '15 at 23:40
Carrie Kendall
10.5k55 gold badges5656 silver badges7979 bronze badges
answered Aug 8 '11 at 9:23
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A positive lambda: '+[]{}' - What sorcery is this? [duplicate]
In Stack Overflow question Redefining lambdas not allowed in C++11, why? , a small program was given that does not compile:
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Using Java with Nvidia GPUs (CUDA)
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First of all, you should be aware of the fact that CUDA will not automagically make computations faster. On the one hand, because GPU programming is an art, and it can be very, very challenging to get it right. On the other hand, beca...
Controlling fps with requestAnimationFrame?
...isk of making my animation choppy, but right now it seems to run at drastically different speeds pretty arbitrarily, and I'm wondering if there's a way to combat that somehow.
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Best Practices for securing a REST API / web service [closed]
...malicious request replaying.
The nice thing about HTTP Basic is that virtually all HTTP libraries support it. You will, of course, need to require SSL in this case because sending plaintext passwords over the net is almost universally a bad thing. Basic is preferable to Digest when using SSL becaus...
techniques for obscuring sensitive strings in C++
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Basically, anyone with access to your program and a debugger can and will find the key in the application if they want to.
But, if you just want to make sure the key doesn't show up when running strings on your binary, you could ...
What does “&” at the end of a linux command mean?
...s will not stay alive after the shell session is closed. SIGHUP terminates all running processes. By default anyway. If your command is long-running or runs indefinitely (ie: microservice) you need to pr-pend it with nohup so it remains running after you disconnect from the session:
nohup sh my_scr...