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Do fragments really need an empty constructor?
...RA_MESSAGE);
//...
//etc
//...
}
Then you would instantiate from your fragment manager like so:
@Override
public void onCreate(Bundle savedInstanceState) {
if (savedInstanceState == null){
getSupportFragmentManager()
.beginTransaction()
.replace(R....
Java Delegates?
...mplementation is very specific to the current context and wouldn't benefit from being reused.
And then of course in Java 8, these do become basically lambda expressions:
// Java 8
SomeMethod(() -> { /* your implementation */ });
...
When should I use double or single quotes in JavaScript?
... with this one. Sure pick a preferred style, but if you need to break away from the style to save escaping lots of quotes in one string. I'd be OK with that.
– Martin Clarke
May 2 '09 at 8:11
...
Java's final vs. C++'s const
... a new object, but it is not immutable - there is nothing stopping someone from calling any set methods.
final Person person = myself;
person = otherPerson; //Invalid
person.setAge(20); //Valid!
Java has no inherent way of declaring objects immutable; you need to design the class as immutable you...
What are the differences between ipython and bpython?
...
A whole parallel programming environment (not really a feature you expect from an interactive Python shell, but IPython offers it).
This list could be nearly arbitrarily continued. And of course there will be lots of features in bpython lacking from IPython, but you did not ask for those.
So ju...
Determine if a function exists in bash
Currently I'm doing some unit tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
...
What is the difference between vmalloc and kmalloc?
...memory in a system call? Is there any reason I couldn't just use vmalloc?
From Google's "I'm Feeling Lucky" on vmalloc:
kmalloc is the preferred way, as long as you don't need very big areas. The trouble is, if you want to do DMA from/to some hardware device, you'll need to use kmalloc, and you'll...
Javascript when to use prototypes
... vitally important part of how jQuery gets it right is that this is hidden from the programmer. It's treated purely an optimisation, not as something that you have to worry about when using the library.
The problem with JavaScript is that naked constructor functions require the caller to remember t...
Check if a JavaScript string is a URL
...ed question with an answer:
Javascript regex URL matching
Or this Regexp from Devshed:
function validURL(str) {
var pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
'((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|'+ // domain name
'((\\d{1,3}\\.){3}\\d{1,3}))'+ // OR ip (v4) addre...
Using Java with Nvidia GPUs (CUDA)
...
As a rule of thumb: You can assume that reading/writing one data element from the "main" GPU memory has a latency of about 500 instructions....
Therefore, another key point for the performance of GPUs is data locality: If you have to read or write data (and in most cases, you will have to ;-)), t...