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Why java.util.Optional is not Serializable, how to serialize the object with such fields
...ften better to have whatever code sets that field apply some policy at the time it's set.
Sometimes people want to put Optional into collections, like List<Optional<X>> or Map<Key,Optional<Value>>. This too is usually a bad idea. It's often better to replace these usages of ...
In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?
...chat application for friends, but unsure about how to get information in a timely manner that is not as manual or as rudimentary as forcing a page refresh.
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Why is it bad style to `rescue Exception => e` in Ruby?
...al_cleanup
end
In the second case, critical cleanup will be called every time, whether or not an exception is thrown.
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Linking R and Julia?
...ll not be anywhere near R in terms of overall statistics workflow for some time yet. So I'd like to use it where C++ is mainly used in R programs: to optimize slow portions of code. Before I invest the time in learning Julia, though, I am curious what facilities there are for embedding Julia snipp...
What are the differences between NP, NP-Complete and NP-Hard?
... intuitive definitions, since the technical definitions require quite some time to understand. First of all, let's remember a preliminary needed concept to understand those definitions.
Decision problem: A problem with a yes or no answer.
Now, let us define those complexity classes.
P
P is a...
How to remove/ignore :hover css style on touch devices
...ts whenever a touch is detected.
function watchForHover() {
// lastTouchTime is used for ignoring emulated mousemove events
let lastTouchTime = 0
function enableHover() {
if (new Date() - lastTouchTime < 500) return
document.body.classList.add('hasHover')
}
function disableHo...
Why shouldn't `'` be used to escape single quotes?
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In my case it was error when I tried to use quote in text Time's up!. There is was warning from Eslint.
To fix it I replaced quote with Time&apos;s up!. Result is as expected
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Google MAP API Uncaught TypeError: Cannot read property 'offsetWidth' of null
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This happens to me all the time when I forget to conditionalize my maps script. Adding: var mapExists = document.getElementById("map-canvas"); if(mapExists) { // script } makes it all better.
– Imperative
Aug 9 '1...
Create or write/append in text file
I have a website that every time a user logs in or logs out I save it to a text file.
7 Answers
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Why is Github asking for username/password when following the instructions on screen and pushing a n
...cial answer to this:
If Git prompts you for a username and password every time you try to interact with GitHub, you're probably using the HTTPS clone URL for your repository.
Using an HTTPS remote URL has some advantages: it's easier to set up than SSH, and usually works through strict firewalls an...