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Strangest language feature
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In JavaScript:
'5' + 3 gives '53'
Whereas
'5' - 3 gives 2
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edited Sep 21 '10 at 10:21
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scheduleAtFixedRate vs scheduleWithFixedDelay
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If you read the Java Doc it will be clearer
ScheduledFuture scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit)
Creates and executes a periodic action that becomes enabled first after the given initial de...
What components are MVC in JSF MVC framework?
... tree
V - Rendered HTML output
C - Client (webbrowser)
In the yet smaller JavaScript picture, the client V is in turn dividable as below:
M - HTML DOM tree
V - Visual presentation
C - Event listener functions (enduser interaction and Ajax)
So it's basically a M(M(M(MVC)C)C)C ;)
Note that some st...
What are the pros and cons of performing calculations in sql vs. in your application
...engine is likely to have a more efficient decimal arithmetic routines than Java.
Generally though for row level calculations there is not much difference.
Where it does make a difference is:
Aggregate calculations like SUM(), AVG(),MIN(), MAX() here the database engine will be an order of magnit...
Why does ConcurrentHashMap prevent null keys and values?
The JavaDoc of ConcurrentHashMap says this:
7 Answers
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How do you create a static class in C++?
... // etc.
}
But you must remember that "static classes" are hacks in the Java-like kind of languages (e.g. C#) that are unable to have non-member functions, so they have instead to move them inside classes as static methods.
In C++, what you really want is a non-member function that you'll declar...
What does @hide mean in the Android source code?
...ype is a collection of classes and methods that are marked with the @hide Javadoc attribute.
Starting from Android 9 (API level 28), Google introduces new restrictions on the use of non-SDK interfaces, whether directly, via reflection, or via JNI. These restrictions are applied whenever an app re...
Commonly accepted best practices around code organization in JavaScript [closed]
As JavaScript frameworks like jQuery make client side web applications richer and more functional, I've started to notice one problem...
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What is a Manifest in Scala and when do you need it?
...Scala 2.7.2 there is something called Manifest which is a workaround for Java's type erasure. But how does Manifest work exactly and why / when do you need to use it?
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Adding up BigDecimals using Streams
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Java standard library already have functions for summing integers/doubles like Collectors.summingInt(), but misses them for BigDecimals. Instead of writing reduce(blah blah blah) that is hard to read it would be better to wri...