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Most efficient way to increment a Map value in Java
...s folks--so I decided to run some tests and figure out which method is actually fastest. The five methods I tested are these:
the "ContainsKey" method that I presented in the question
the "TestForNull" method suggested by Aleksandar Dimitrov
the "AtomicLong" method suggested by Hank Gay
the "Trove...
What is a simple/minimal browserconfig.xml for a web site
...config.xml from a user agents which identified as IE 11. So probably the really only way to get rid of those 404s is to also add an empty file for browserconfig.xml. I tried pinning using the empty file and didn't see a difference with or without the empty file.
– Gerd K
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Move existing, uncommitted work to a new branch in Git
...ve your current branch as it is, create and checkout a new branch and keep all your changes. You can then stage changes in files to commit with:
git add <files>
and commit to your new branch with:
git commit -m "<Brief description of this commit>"
The changes in the working direct...
JavaScript to scroll long page to DIV
...ding to the great compatibility-tables on quirksmode, this is supported by all major browsers!
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How do I replace a character at a particular index in JavaScript?
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Note that it's generally not a good idea to extend base JavaScript classes. Use a plain utility function instead.
– Ates Goral
Sep 16 '09 at 5:40
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ORA-00979 not a group by expression
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You must put all columns of the SELECT in the GROUP BY or use functions on them which compress the results to a single value (like MIN, MAX or SUM).
A simple example to understand why this happens: Imagine you have a database like this:
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AngularJS - difference between pristine/dirty and touched/untouched
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$pristine/$dirty tells you whether the user actually changed anything, while $touched/$untouched tells you whether the user has merely been there/visited.
This is really useful for validation. The reason for $dirty was always to avoid showing validation responses until t...
Libraries do not get added to APK anymore after upgrade to ADT 22
...d wrong to have every Developer [that uses Eclipse and Libraries] go in to all of their library projects and mark "Android Private Libraries" as Exported? This makes me think that we have all mistaken the intention of Google adding this new "feature" in the first place. Maybe we aren't supposed to m...
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...
In ASP.NET, when should I use Session.Clear() rather than Session.Abandon()?
...n and the Session_OnEnd event is triggered.
Session.Clear() just removes all values (content) from the Object. The session with the same key is still alive.
So, if you use Session.Abandon(), you lose that specific session and the user will get a new session key. You could use it for example when ...