Questions tagged [byref]
182 questions
2
votes
1 answer
Differences between address-of and ref operators
In my code I'm passing around some structures by reference, declaring them mutable and using the & symbol. The problem is that in some place the fields are corrupted (happens only in release mode) and I don't know absolutely why.
I have found a fix,…
elmattic
- 12,046
- 5
- 43
- 79
2
votes
2 answers
F#: How to Call a function with Argument Byref Int
I have this code:
let sumfunc(n: int byref) =
let mutable s = 0
while n >= 1 do
s <- n + (n-1)
n <- n-1
printfn "%i" s
sumfunc 6
I get the error:
(8,10): error FS0001: This expression was expected to have type
'byref'
but…
Nulle
- 1,301
- 13
- 28
2
votes
2 answers
Fill an array with dates
Really can't see why the dates I'm pushing into an array are not the dates that come out when I call the array in the console. i.e. I would expect the first entry in the array to be today's date, which is what comes back from both alert calls, but…
Dan Solo
- 697
- 1
- 8
- 21
2
votes
2 answers
Working with arrays passed byref
I would like for someone to explain this to me:
function myFunction(array){
array = $.grep(array, function(n,i){return n > 1 });
}
var mainArray = [1,2,3];
myFunction(mainArray);
document.write(mainArray) // 1,2,3, but i'm expecting 2,3
but…
Jason
- 51,583
- 38
- 133
- 185
2
votes
1 answer
VB.Net: Byref-in a parent type but return child type to ByRef
how do I keep the child type returned to the ByRef referenced variable in this scenario?
Public Class Father
End Class
Public Class Son
Inherits Father
End Class
' Should return a Son, not a Father
Public Sub Save(ByRef obj as Father)
Matthias Max
- 595
- 1
- 7
- 20
2
votes
2 answers
Get String Value of passed ByRef Variable
Say I call a function that uses a byref modifier. Once in the function, I want to fetch the string value of the passed variable.
myvar := "george"
passit(myvar)
passit(byref whatvar){
msgbox % %whatvar% ;I should see a messagebox reporting…
bgmCoder
- 6,205
- 8
- 58
- 105
2
votes
1 answer
PHP: Is it possible to pass xml node to function by ref and make change?
I wish to pass a xml node to a function by ref, and make change within the function. But seem the node's value couldn't be changed in this way.
Example:
foo ';
$xml =…
Paulinus Wong
- 21
- 1
2
votes
3 answers
VB.NET - Function Cannot Modify a Member Of An Array
I'm trying to pass an Array to a Sub so the Sub can modify one of the values of the array.
Something like this
Dim a As String = "STARTVALUE"
PopulateDataSet("Management", {a})
Public Sub PopulateDataSet(ByRef SomeRandomOtherVariable As String,…
TRH
- 608
- 1
- 8
- 24
2
votes
1 answer
vbval vs public variable
In VBA, I generally define shared variables as Public as opposed to building references via byVal or byRef. Most commonly, I call a subroutine or function to establish a value for said variable. Will someone please explain to me the benefit of…
Nathan Green
- 93
- 6
2
votes
1 answer
Test at runtime if a passed in ByRef parameter shares storage location with a given "other" variable
This question is more out of curiosity than out of a practical need.
Is there any way one can test if the argument passed in to a ByRef (that is ref or out in C#) parameter has the same storage location as some "other" variable? I don't mean to test…
Jeppe Stig Nielsen
- 60,409
- 11
- 110
- 181
2
votes
1 answer
When IQueryable is created from a linq query why is it not a "new" variable?
I am using the Entity Framework and have got a loop that looks at a set of People and using a foreach loop creates a query for the address of each person. As each address query is created it is added to the node of a treeview where it can be later…
Calanus
- 25,619
- 25
- 85
- 120
2
votes
1 answer
converting vb.net to c#- optimise parameter passing
I want to move a vb.net app to c#. The vb.net app has thousands of byref parameters that should be byval. Does anybody know a way to automate checking whether each parameter passing approach can be safely changed?
daniel
- 289
- 1
- 3
- 4
2
votes
3 answers
How to reference a class variable from another class in vb.net
I have the following (simplified to make this easy to read)
first class:
Class MainWindow
Private mFile As myFile 'myFile is a class containing a bunch of stuff
Sub go()
dim editFiles as New EditFiles(mFile)
End Sub
End…
user1839684
- 104
- 1
- 2
- 7
2
votes
4 answers
Is it possible to declare a local/class instance member reference variable in VB.net to read/update same object referred by another variable
In C++, it is possible to do:
int x;
int& foo = x;
// foo is now a reference to x so this sets x to 56
foo = 56;
But is an equivalent possible in Visual Basic .net (VB.net)?
I am aware of the ByRef term in VB.net but I have only seen (and by…
therobyouknow
- 6,604
- 13
- 56
- 73
2
votes
1 answer
Class Not Updating Variables passed byref
I have a class in vb.net defined as public class A
class A is created on Load and gets called once per program loop
The constructor for class A includes the argument (byref Value as long)
I have a global variable called varB that is passed to class…
Tony Raymond
- 187
- 10