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Array versus List: When to use which?
... encoding;
I use a local rolling byte[] buffer which I fill before sending down to the underlying stream (and v.v.); quicker than BufferedStream etc;
it internally uses an array-based model of objects (Foo[] rather than List<Foo>), since the size is fixed once built, and needs to be very fast....
How to create the most compact mapping n → isprime(n) up to a limit N?
...t N primes on the internet with N stretching up to at least fifty million. Download the files and use them, it's likely to be much faster than any other method you'll come up with.
If you want an actual algorithm for making your own primes, Wikipedia has all sorts of good stuff on primes here, incl...
How to find Unused Amazon EC2 Security groups
... need to actually confirm the delete, in the popup it will show you a breakdown of which ones can be deleted (orphan) and which can't. You can then press cancel and then delete the orphan ones.
– rjarmstrong
Jun 21 '18 at 7:03
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How to calculate a Mod b in Casio fx-991ES calculator
... switch display mode to ab/c:
Go to settings (Shift + Mode).
Press arrow down (to view more settings).
Select ab/c (number 1).
Now do your calculation (in comp mode), like 50 / 3 and you will see 16 2/3, thus, mod is 2. Or try 54 / 7 which is 7 5/7 (mod is 5).
If you don't see any fraction then ...
Polymorphism: Why use “List list = new ArrayList” instead of “ArrayList list = new ArrayList”? [dupl
...Safallwa the methods of List,or you may access the methods of ArrayList by downcasting later
– LancelotHolmes
Nov 21 '16 at 3:11
1
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Best way to convert an ArrayList to a string
...hell this is not the first (and accepted) answer.. I always have to scroll down until I know it's there.. elegant and concise
– Jack
Feb 24 '17 at 15:08
2
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How do I delete unpushed git commits?
... easier:
git cherry-pick master..topic
So the entire sequence will come down to:
git reset --hard <latest-commit-to-keep>
git cherry-pick master..topic
When your topic-duplicate branch has been checked out. That would remove previously-cherry-picked commits from the current duplicate, an...
In Java, when should I create a checked exception, and when should it be a runtime exception? [dupli
...ily IOException; that's just an example) wasn't recoverable but was forced down my throat anyway and I am often forced to make the choice between doing the above and polluting my API just to propagate a checked exception all the way to the top where it's (rightlfully) fatal and will be logged.
Ther...
How do I get a YouTube video thumbnail from the YouTube API?
...deo has four generated images. They are predictably formatted as follows:
https://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg
https://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg
https://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpg
https://img.you...
When to use a View instead of a Table?
...life of the session? Reason I ask: we have a system that sometimes goes down in the middle of a long code run. I mitigate this by biting portions of the code into intermediate tables which save intermediate results. So if the system conks before code is complete, I only have to pick up starting...