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When and how should I use a ThreadLocal variable?
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One possible (and common) use is when you have some object that is not thread-safe, but you want to avoid synchronizing access to that object (I'm looking at you, SimpleDateFormat). Instead, give each thread its own instance of the object.
For example:
public class Foo
{...
Difference between Hive internal tables and external tables?
Can anyone tell me the difference between Hive's external table and internal tables.
I know the difference comes when dropping the table. I don't understand what you mean by the data and metadata is deleted in internal and only metadata is deleted in external tables.
Can anyone explain me in terms o...
NodeJS - Error installing with NPM
... Caress . But i am not unable to. I am using Windows 8.1, can anyone tell me what is the problem i am facing, and why is this installation not working. There seems to be a problem with the buffertools dependency, thats far as i can think. Dont know how maybe fix this?
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When to delete branches in Git?
...can safely remove a branch with git branch -d yourbranch. If it contains unmerged changes (ie, you would lose commits by deleting the branch), git will tell you and won't delete it.
So, deleting a merged branch is cheap and won't make you lose any history.
To delete a remote branch, use git push o...
Nested classes' scope?
...ner_var(self):
return Outer.outer_var
This isn't quite the same as similar things work in other languages, and uses global lookup instead of scoping the access to outer_var. (If you change what object the name Outer is bound to, then this code will use that object the next time it is e...
How to properly reuse connection to Mongodb across NodeJs application and modules
...g and reading and still am confused on what is the best way to share the same database (MongoDb) connection across whole NodeJs app. As I understand connection should be open when app starts and reused between modules. My current idea of the best way is that server.js (main file where everything s...
Is Disney's FastPass Valid and/or Useful Queue Theory
... wait longer than an hour, or you can get a FastPass which allows you to come back during a specified time block (usually a couple hours later) and only wait for 10 minutes or less. You can only be "waiting" for one ride at a time with a FastPass.
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Does anyone have benchmarks (code & results) comparing performance of Android apps written in Xamari
I came across Xamarin claims that their Mono implementation on Android and their C# compiled apps are faster than Java code. Did anyone perform actual benchmarks on very similar Java and C# code on different Android platforms to verify such claims, could post the code and results?
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iOS / Android cross platform development [closed]
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Disclaimer: I work for a company, Particle Code, that makes a cross-platform framework. There are a ton of companies in this space. New ones seem to spring up every week. Good news for you: you have a lot of choices.
These framework...
Callback when CSS3 transition finishes
I'd like to fade out an element (transitioning its opacity to 0) and then when finished remove the element from the DOM.
5 ...