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Member function with strange type causing callback function mismatch


Member function with strange type causing callback function mismatch

By : user3099824
Date : January 11 2021, 05:14 PM
may help you . That signature means it is a pointer to a member function rather than a regular pointer to function. In order for MonoOdometer::imageCallback to be called it needs an instance of the class MonoOdometer to call it with, but your create_camera_subscription just expects it to be a standalone function. Two solutions would be to either make imageCallback a static method, or pass a functor (like a lambda) which will call imageCallback in its own call operator.
Static:
code :
static void imageCallback(...) {
  // ...
}
image_transport::create_subscription(this, "image",
  [&](auto& msg) { this->imageCallback(msg); }, transport, 1);


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Strange (?) type mismatch error in this function

Strange (?) type mismatch error in this function


By : user5916688
Date : March 29 2020, 07:55 AM
hop of those help? Your first snippet defines function rotate with return type of string.
Try to change it to:
code :
let rotate (s: string) = 
  [|for c in s -> c|] 
  |> Array.permute (function | 0 -> (s.Length-1) | i -> i-1)
Array from server causing strange append behaviour in ajax success callback function?

Array from server causing strange append behaviour in ajax success callback function?


By : roadrocket13
Date : March 29 2020, 07:55 AM
hop of those help? When the second callback is executed, you have two
on the page.
You should change .appendTo('.parent'); to .appendTo(Parent); - that way you will reference the newly created div, not all .parent divs on the page.
Type mismatch when passing member function pointer to a function that takes MFP with variadic arguments

Type mismatch when passing member function pointer to a function that takes MFP with variadic arguments


By : Jim Anderson
Date : March 29 2020, 07:55 AM
may help you . After a bit more of messing around with compilers, I found a simple workaround in a form of a template wrapper. Apparently gcc and clang have no problem with expanding the In ... pack before Out* in a type alias (using or typedef) and only struggle when it's part of a function definition.
code :
namespace detail {
    template<typename T, typename Out, typename ... In>
    struct funcHelper {
        using type = void(T::*)(In ..., Out*);
    };
}

class Foo {
public:
    Foo() {}

    template<typename T, typename Out, typename ... In>
    void foo(T *obj, typename detail::funcHelper<T, Out, In ...>::type func) {
        ...
    }
    ...
};



class Bar {
public:
    Bar() {}
    void bar(int in, bool *out) {
        ...
    }
};

int main()
{
   Foo foo;
   Bar bar;

   foo.foo<Bar, bool, int>(&bar, &Bar::bar);
   ...
}
Excel VBA Array() function causing type mismatch?

Excel VBA Array() function causing type mismatch?


By : Nivod
Date : March 29 2020, 07:55 AM
Any of those help Array doesn't return a typed array (e.g. String()).
Change your signature to take a Variant instead:
code :
Public Function checkFileExistence(arrFileNames As Variant, Optional bShowErrMsg As Boolean = False) As Boolean
    If Not IsArray(arrFileNames) Then Err.Raise 5, "CheckFileExistence", "Expected array, but received a " & TypeName(arrFileNames) & "."
For i = LBound(arrFileNames) To UBound(arrFileNames)
Worksheet function Sum-if causing error type mismatch

Worksheet function Sum-if causing error type mismatch


By : Alavan
Date : March 29 2020, 07:55 AM
To fix the issue you can do I am looping through the worksheets to sumif the amounts that are "C" and "D". , Your SUMIF looks incorrect.
Eg try this instead:
code :
UIGFile.Worksheets(I).Range("T4").Value = _
    Application.WorksheetFunction.SumIf(ws.Range("N:N"), "C", ws.Range("M:M"))
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