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How can I ensure that a division of integers is always rounded up?
...ive when the two operands have opposite signs
If the left operand is the smallest representable int and the right operand is –1, an overflow occurs. [...] it is implementation-defined as to whether [an ArithmeticException] is thrown or the overflow goes unreported with the resulting value being th...
Variable is accessed within inner class. Needs to be declared final
...anges made in the inner class did not persist in the enclosing scope. Basically, what happens in the inner class stays in the inner class.
I wrote a more in-depth explanation here. It also explains why instance and global variables do not need to be declared final.
...
Why is there a difference in checking null against a value in VB.NET and C#?
...I don't know yet". Then the comparison of 5 to "I don't know yet". is naturally "I don't know yet"; ie NULL. This has the additional advantage of mirroring the behaviour of NULL in (most if not all) SQL databases. This is also a more standard (than C#'s) interpretation of three-valued logic, as expl...
App Inventor 2 项目合并工具 AIMerge · App Inventor 2 中文网
...gning the first screen to appear on the app should populate “Screen1.” All other developers should leave “Screen1” blank and only develop additional screens. In the case that another developer does populate “Screen1”, the merger tool will allow that screen to be renamed so it can be merg...
How do you remove a specific revision in the git history?
...
git rebase -i <after-this-commit>
An editor will be fired up with all the commits in your current branch (ignoring merge commits), which come after the given commit. You can reorder the commits in this list to your heart's content, and you can remove them. The list looks more or less like t...
JavaScript: Upload file
...
Pure JS
You can use fetch optionally with await-try-catch
let photo = document.getElementById("image-file").files[0];
let formData = new FormData();
formData.append("photo", photo);
fetch('/upload/image', {method: "POST", body: formData});
async fu...
What is the best comment in source code you have ever encountered? [closed]
...ents, code poetry and little jokes into most of my projects (although I usually have enough sense to remove anything directly offensive before releasing the code). Here's one I'm particulary fond of, placed far, far down a poorly-designed 'God Object':
/**
* For the brave souls who get this far: Yo...
Some font-size's rendered larger on Safari (iPhone)
...blem you're describing centers around the fact that Mobile Safari automatically scales text if it thinks the text will render too small. You can get around this with the CSS property -webkit-text-size-adjust. Here's a sample of how to apply this to your body, just for the iPhone:
@media screen and...
PHP Remove elements from associative array
...',
4 => 'Completed',
5 => 'Mark As Spam',
);
That would allow you to use your values of key as indexes to access the array...
And you'd be able to use functions to search on the values, such as array_search() :
$indexCompleted = array_search('Completed', $array);
unset($array[$...
How to determine the number of days in a month in SQL Server?
...
All of the solutions mentioned here pale in comparison to the elegance of @Mikael Eriksson's answer. That works whenever a valid date is provided without crazy workarounds for niche cases and is far simpler code - I'd highly...