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How to run Unix shell script from Java code?
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Note that that you may need to specify the program /bin/bash or sh to execute the script within depending on Java's configuration (see stackoverflow.com/questions/25647806/…)
– Ben Holland
Feb 27 '18 at 3:00
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Difference between $(this) and event.target?
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There is a difference between $(this) and event.target, and quite a significant one. While this (or event.currentTarget, see below) always refers to the DOM element the listener was attached to, event.target is the actual DOM element tha...
How to get the client IP address in PHP [duplicate]
...e IP can be an internal IP from the LAN behind the proxy.
This means that if you are going to save the $_SERVER['HTTP_X_FORWARDED_FOR'], make sure you also save the $_SERVER['REMOTE_ADDR'] value. E.g. by saving both values in different fields in your database.
If you are going to save the IP to a ...
Why not abstract fields?
...ring doSomething() {
return errMsg + " from something";
}
}
If your child class "forgets" to initialise the final through the super constructor the compiler will give a warning an error, just like when an abstract method is not implemented.
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Random string generation with upper case letters and digits
...ty of this question, I bet that mistake has been made many times already.
If you're using python3.6 or above, you can use the new secrets module as mentioned in MSeifert's answer:
''.join(secrets.choice(string.ascii_uppercase + string.digits) for _ in range(N))
The module docs also discuss conve...
Suppress warning CS1998: This async method lacks 'await'
...ou can take advantage of the fact that async is an implementation detail.
If you have nothing to await, then you can just return Task.FromResult:
public Task<int> Success() // note: no "async"
{
... // non-awaiting code
int result = ...;
return Task.FromResult(result);
}
In the case ...
What is the most “pythonic” way to iterate over a list in chunks?
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Modified from the recipes section of Python's itertools docs:
from itertools import zip_longest
def grouper(iterable, n, fillvalue=None):
args = [iter(iterable)] * n
return zip_longest(*args, fillvalue=fillvalue)
Exa...
Removing the title text of an iOS UIBarButtonItem
...:UIBarMetricsDefault];
Then you can remove the back button item title.
If you use Storyboard, you can set navigation attributes inspector Back Button with space.
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Why is there a `null` value in JavaScript?
...g this weird undefined that will fail later, is a big source of debugging difficulty.
*: you could also argue that (2) should throw an exception, but then you'd have to provide a better, more explicit mechanism for default/variable arguments.
However JavaScript didn't originally have exceptions, o...
Change case of a file on Windows?
...uple of files in our git-controlled codebase that I'd like to rename. Specifically, I just want to change the case of the file, so that sourceCode.java becomes SourceCode.java , for example. The catch: I'm on a Windows box, and the filesystem thinks those are the same file name.
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