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Javascript when to use prototypes
...ing that you have to worry about when using the library.
The problem with JavaScript is that naked constructor functions require the caller to remember to prefix them with new or otherwise they typically don't work. There is no good reason for this. jQuery gets it right by hiding that nonsense behi...
Ruby - test for array
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Type checking is for Java. Go ahead and just call count on the variable. Write unit tests to make sure the method works as expected.
– user132447
Mar 21 '12 at 14:55
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When to use , tag files, composite components and/or custom components?
...ound to a single bean property. E.g. a component which represents a single java.util.Date property by 3 dependent <h:selectOneMenu> components, or a component which combines <p:fileUpload> and <p:imageCropper> into a single <my:uploadAndCropImage> referring a single custom co...
What does “S3 methods” mean in R?
...ric-function OO.
This is different from most programming languages, like Java, C++ and
C#, which implement message-passing OO. With message-passing, messages
(methods) are sent to objects and the object determines which function
to call. Typically, this object has a special appearance in the...
How do I discover memory usage of my application in Android?
...s, thus needing to start killing needed processes like services. For pure Java applications, this should be of little use, since the Java heap limit is there in part to avoid one app from being able to stress the system to this point.
Going lower-level, you can use the Debug API to get raw kernel-...
Deserialize JSON with C#
...t; set;}
}
Then you should be able to do:
Friends facebookFriends = new JavaScriptSerializer().Deserialize<Friends>(result);
The names of my classes are just an example. You should use proper names.
Adding a sample test:
string json =
@"{""data"":[{""id"":""518523721"",""name"":""ft...
top -c command in linux to filter processes listed based on processname
...he o key and then type in a filter expression. For example, to monitor all java processes use the filter expression COMMAND=java. You can add multiple filters by pressing the key again, you can filter by user with the u key, and you can clear all filters with the = key.
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What is the difference between atomic / volatile / synchronized?
...p a thread that is running forever without any use and Stopping a specific java thread.
AtomicInteger
private AtomicInteger counter = new AtomicInteger();
public int getNextUniqueIndex() {
return counter.getAndIncrement();
}
The AtomicInteger class uses CAS (compare-and-swap) low-level CPU op...
.gitignore is ignored by Git
...sh removing files from .gitignore file."
// For example, if you want the .java type file to be tracked again,
// The command should be:
// git add -f *.java
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How to use JUnit to test asynchronous processes
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If you use a CompletableFuture (introduced in Java 8) or a SettableFuture (from Google Guava), you can make your test finish as soon as it's done, rather than waiting a pre-set amount of time. Your test would look something like this:
CompletableFuture<String> fu...