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round() for float in C++
... which says (emphasis mine):
A prvalue of a floating point type can be converted to a prvalue of an
integer type. The conversion truncates; that is, the fractional part
is discarded. The behavior is undefined if the truncated value cannot
be represented in the destination type.[...]
For ...
Why does integer division in C# return an integer and not a float?
... is applied to select a specific operator implementation. The operands are converted to the parameter types of the selected operator, and the type of the result is the return type of the operator.
The predefined division operators are listed below. The operators all compute the quotient of x an...
How to do the equivalent of pass by reference for primitives in Java
...e two functions are methods on the same class or class instance, you could convert toyNumber into a class member variable.
Choice 4: Create a single element array of type int and pass that
This is considered a hack, but is sometimes employed to return values from inline class invocations.
void pl...
In C#, how do I calculate someone's age based on a DateTime type birthday?
...ar - birthDate.Year;
if (age > 0)
{
age -= Convert.ToInt32(laterDate.Date < birthDate.Date.AddYears(age));
}
else
{
age = 0;
}
return age;
}
}
Now, run this test:
class Program
{
static void Main(strin...
Filtering collections in C#
...here returns an
// IEnumerable<T> so a call to ToList is required to convert back to a List<T>.
List<int> filteredList = myList.Where( x => x > 7).ToList();
If you can't find the .Where, that means you need to import using System.Linq; at the top of your file.
...
How to add items to a spinner in Android?
...
This code basically reads a JSON array object and convert each row into an option in the spinner that is passed as a parameter:
public ArrayAdapter<String> getArrayAdapterFromArrayListForSpinner(ArrayList<JSONObject> aArrayList, String aField)
{
ArrayAdapter...
Elegant way to invert a map in Scala
...Int,String] = Map(1 -> d, 2 -> b, 3 -> c)
To avoid this you can convert your map to a list of tuples first, then invert, so that you don't drop any duplicate values:
scala> val i = m.toList.map({ case(k , v) => v -> k})
i: List[(Int, String)] = List((1,a), (2,b), (3,c), (1,d))
...
Why is a boolean 1 byte and not 1 bit of size?
...nter, that is address + bit number. Obviously, such a pointer would not be convertible to void* because of the extra storage requirement for the bit number.
– Maxim Egorushkin
Jan 7 '11 at 17:10
...
Can a Byte[] Array be written to a file in C#?
...
Try BinaryReader:
/// <summary>
/// Convert the Binary AnyFile to Byte[] format
/// </summary>
/// <param name="image"></param>
/// <returns></returns>
public static byte[] ConvertANYFileToBytes(HttpPostedFileBase image)
{
byte...
Determining if an Object is of primitive type
...uto-boxing. The compiler does this itself. When it sees an opportunity, it converts a primitive type into its appropriate wrapper class.
What is probably happening here is when you declare
Object o = i;
The compiler will compile this statement as saying
Object o = Integer.valueOf(i);
This is ...