unboxing Questions
2
Solved
I have the following return statement:
public Boolean foo(String booleanString){
return ("true".equals(booleanString) ? true : ("false".equals(booleanString) ? false : null));
}
when boo...
Nuncio asked 6/5, 2015 at 13:58
2
Solved
I know its a very basic question but I want to be clear about the concept. I want to know how == operator works in case of primitive and object type. For example
Integer a = 1;
int b = 1;
System.o...
2
Solved
Here is a test program:
main = do
n <- fmap read $ getLine :: IO Int
if (999999 == n) then putStrLn "equal" else return ()
And here is the relevant bit of core when compiled with ghc --make...
Predictory asked 17/12, 2014 at 18:9
1
Is there a Haskell library for automatic differentiation which works with unboxed vectors? The grad function from Numeric.AD requires an instance of Traversable, which Data.Vector.Unboxed is not.
4
Solved
I understand what boxing is. A value type is boxed to an object/reference type and is then stored on managed heap as an object. But I can't get thru unboxing.
Unboxing converts your object/referen...
8
Solved
Edit: Comments at bottom. Also, this.
Here's what's kind of confusing me. My understanding is that if I have an enum like this...
enum Animal
{
Dog,
Cat
}
...what I've essentially done is d...
Titfer asked 7/1, 2011 at 14:22
1
Solved
Suppose I have a simple data type like:
data Cell = Open | Blocked
and I'd like to use a UArray Int Cell. Is there an easy way to do this? Can I somehow reuse the definition for UArray Int Bool?...
1
Solved
Overview (forgive me for being so detailed, but I'd rather it be too much than too little): I'm attempting to edit the Dapper source for our solution in such a way that when any DateTime or Nullabl...
Paxwax asked 11/2, 2014 at 19:29
2
Solved
I'm working with an interface that takes type Object as its input. This is unfortunate for me as I have primitive data that I sometimes need to pass in through the interface. This of course forces ...
Abroach asked 2/8, 2011 at 3:7
5
Solved
public class T1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Integer i1 = 1000;
Integer i2 = 1000;
if(i1 != i2) System.out.println("different objects"...
Turgot asked 26/12, 2013 at 12:12
2
Solved
lets say, i have the following code in c#
int x = 0;
x.ToString();
does this internally does a boxing of x?
Is there a way to see this happening from visual studio?
Ormuz asked 4/9, 2013 at 13:46
3
Solved
I recently tried to run the following two snippets of code and was surprised at the output.
First:
// ...
System.out.println( (Boolean)null || true );
// ...
Second:
// ...
System.out.printl...
Rockandroll asked 23/8, 2013 at 2:32
2
Solved
I have noted a difference in auto unboxing behavior between Java SE 6 and Java SE 7. I'm wondering why that is, because I can't find any documentation of changes in this behavior between these two ...
2
For example, look at this code:
Integer myInt = new Integer(5);
int i1 = myInt.intValue();
int i2 = myInt;
System.out.println(i1);
System.out.println(i2);
As you can see, I have two ways of copy...
6
Solved
If you run the following code,
public class Foo{
public static void main(String[] args){
int id = new Bar().getId(); // throws unexpected NullPointerException
}
private static class Bar{
pri...
Jer asked 20/2, 2013 at 23:44
2
I'm having trouble finding good resources that work for how to make my data types unboxed, for use in an unboxed vector. How would I make the data type
data Color = Yellow | Red | Green | Blue | E...
Intendant asked 28/11, 2012 at 7:35
2
Solved
Background: I'm developing for the xbox and am at the optomising stage. I need to cut down on object allocations. One place to start is finding out where (un)boxing occurs.
I'm very new to IL (in ...
Goldi asked 20/6, 2011 at 20:11
2
Solved
Below is some quick code to illustrate my question. Any way to avoid this apparently unnecessary boxing/unboxing?
public class TestClass<T>
{
public T TestMethod()
{
if (typeof(T) == type...
3
Solved
For example:
int anInt = null;
fails at compile time but
public static void main(String[] args) {
for (int i = 0; i < 10; i++) {
System.out.println("" + getSomeVal());
}
}
public static i...
Parasynthesis asked 10/8, 2012 at 8:21
6
Solved
Another recent C# interview question I had was if I knew what Boxing and Unboxing is.
I explained that value types are on Stack and reference types on Heap.
When a value is cast to a reference type...
6
Solved
This is not a question of what is boxing and unboxing,
it is rather why do languages like Java and C# need that ?
I am greatly familiar wtih C++, STL and Boost.
In C++ I could write something lik...
1
Solved
I've got a numeric application that does a lot of work with negative logs of probabilities, which (since probabilities range from zero to one) take the values of positive doubles, or negative infin...
1
Solved
I've been trying to understand this paragraph, but somehow I couldn't virtualize it in my mind, some one please elaborate it little bit:
Unboxing is not the exact opposite of boxing. The unboxin...
1
Solved
What I understand unboxing is when I take a object and unbox it to valuetype like the MSDN example:
int i = 123;
object o = i;
o = 123;
i = (int)o; // unboxing
So I just was thinking, can a str...
4
I read What is boxing and unboxing and what are the trade offs? but can't understand one thing. Suppose I have a class:
class MyClass
{
public int Value { get; set; }
}
And I want to get value ...
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