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How to check if a String contains only ASCII?
... 0x20 (space) such as tabs, line-feed / return but also BEL with code 0x07 and DEL with code 0x7F.
This code incorrectly uses characters rather than code points, even if code points are indicated in the comments of earlier versions. Fortunately, the characters required to create code point with a v...
Quickly create a large file on a Linux system
...her answers is a good solution, but it is slow for this purpose. In Linux (and other POSIX systems), we have fallocate, which uses the desired space without having to actually writing to it, works with most modern disk based file systems, very fast:
For example:
fallocate -l 10G gentoo_root.img
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What's the best way to detect a 'touch screen' device using JavaScript?
I've written a jQuery plug-in that's for use on both desktop and mobile devices. I wondered if there is a way with JavaScript to detect if the device has touch screen capability. I'm using jquery-mobile.js to detect the touch screen events and it works on iOS, Android etc., but I'd also like to writ...
Git's famous “ERROR: Permission to .git denied to user”
I have tried googling and read through https://help.github.com/en/articles/connecting-to-github-with-ssh and various, various guides. I am unable to git push -u origin master or git push origin master ( the same command ).
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What is a .pid file and what does it contain?
I recently come across a file with the extension .pid and explored inside it but didn't find much. The documentation says:
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getting the X/Y coordinates of a mouse click on an image with jQuery [duplicate]
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You can use pageX and pageY to get the position of the mouse in the window. You can also use jQuery's offset to get the position of an element.
So, it should be pageX - offset.left for how far from the left of the image and pageY - offset.top...
what happens when you type in a URL in browser [closed]
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Attention: this is an extremely rough and oversimplified sketch, assuming the simplest possible HTTP request (no HTTPS, no HTTP2, no extras), simplest possible DNS, no proxies, single-stack IPv4, one HTTP request only, a simple HTTP server on the other end, and n...
differentiate null=True, blank=True in django
...mines whether the field will be required in forms. This includes the admin and your custom forms. If blank=True then the field will not be required, whereas if it's False the field cannot be blank.
The combo of the two is so frequent because typically if you're going to allow a field to be blank in...
How do I push amended commit to the remote Git repository?
When I've worked a bit with my source code, I did my usual thing commit and then I pushed to a remote repository. But then I noticed I forgot to organize my imports in the source code. So I do the amend command to replace the previous commit:
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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...n CityService. Later you add a city1 as a reference to the new Employee e1 and add e1 including this reference to city1 to the context in EmployeeService. As a result you have city1 attached to two different context which is what the exception complains about.
You can fix this by creating a context...