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What is Type-safe?
...5"), and it is expecting an integer.
In a loosely typed language, such as javascript, I can do the following:
function AddTwoNumbers(a, b)
{
return a + b;
}
if I call it like this:
Sum = AddTwoNumbers(5, "5");
Javascript automaticly converts the 5 to a string, and returns "55". This is du...
Speed up the loop operation in R
...If you are using for loops, you are most likely coding R as if it was C or Java or something else. R code that is properly vectorised is extremely fast.
Take for example these two simple bits of code to generate a list of 10,000 integers in sequence:
The first code example is how one would code ...
Function to return only alpha-numeric characters from string?
... Does PHP have access to the ISO Stringprep algorithm? I know Perl and Java do.
– tchrist
Mar 4 '11 at 21:20
I bel...
Difference between android.app.Fragment and android.support.v4.app.Fragment
...
@ergohack See it that way: for java code you can either include the bytecode inside the runtime of the device or inside the jar file of the application. Support library code will be put in your jar, and provide the same feature as the runtime-provided code...
Compare object instances for equality by their attributes
...ance, Python will compare them by keys / values automatically. This is not Java...
– e-satis
Aug 4 '09 at 16:32
The fi...
What is the difference between DAO and Repository patterns?
...) and Repository patterns? I am developing an application using Enterprise Java Beans (EJB3), Hibernate ORM as infrastructure, and Domain-Driven Design (DDD) and Test-Driven Development (TDD) as design techniques.
...
Why are static variables considered evil?
I am a Java programmer who is new to the corporate world. Recently I've developed an application using Groovy and Java. All through the code I wrote used quite a good number of statics. I was asked by the senior technical lot to cut down on the number of statics used. I've googled about the same, ...
Observer Design Pattern vs “Listeners”
...to the Observer pattern or not will depend upon the context. For example, Java Swing's "Event Listeners" are part of an Observer pattern implementation while .Net "Trace Listeners" are not.
It isn't uncommon for framework authors to assign different names to components participating in a given pat...
When and why JPA entities should implement Serializable interface?
...ty class must implement the Serializable interface.
"JSR 220: Enterprise JavaBeansTM,Version 3.0 Java Persistence API Version 3.0, Final Release May 2, 2006"
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How to Sign an Already Compiled Apk
...t to sign your unsigned apk.
Use the keytool provided by the JDK found in %JAVA_HOME%/bin/
keytool -genkey -v -keystore my.keystore -keyalg RSA -keysize 2048 -validity 10000 -alias app
Step 2 or 4: Zipalign
zipalign which is a tool provided by the Android SDK found in e.g. %ANDROID_HOME%/sdk/bui...