User Type vs Class - General question:

Are there any significant disadvantages to using a user defined type instead
of a class module?

I know that Classes are more portable but seems that the two are
interchangeable in many instances and it takes less code to use Type. So for
one off solutions I tend to lean towards a user defined type and was just
wondering if there was any big issue I was missing.

I am with you on this one. Classes are great for events but otherwise not too
handy in Excel. The UDT is a great tool. It has much less overhead than a
class. The only draw back is that a UDT can not have methods.
--
HTH...

Jim Thomlinson


"Vacation's Over" wrote:

> Are there any significant disadvantages to using a user defined type instead
> of a class module?
>
> I know that Classes are more portable but seems that the two are
> interchangeable in many instances and it takes less code to use Type. So for
> one off solutions I tend to lean towards a user defined type and was just
> wondering if there was any big issue I was missing.

Thanks Jim

With limited processing it's nice to limit processing.
Now I don't need to think on that one anymore.

"Jim Thomlinson" wrote:

> I am with you on this one. Classes are great for events but otherwise not too
> handy in Excel. The UDT is a great tool. It has much less overhead than a
> class. The only draw back is that a UDT can not have methods.
> --
> HTH...
>
> Jim Thomlinson
>
>
> "Vacation's Over" wrote:
>
> > Are there any significant disadvantages to using a user defined type instead
> > of a class module?
> >
> > I know that Classes are more portable but seems that the two are
> > interchangeable in many instances and it takes less code to use Type. So for
> > one off solutions I tend to lean towards a user defined type and was just
> > wondering if there was any big issue I was missing.

If you look at what the machine is actually doing when it declares an
integer, or a double or a ... is it is reserving a memory space equivalent to
an integer. When you retreive the value you just read that much memory. A UDT
just defines the amount of memory required to hold all of the variables
defined.

That is why strings are so inefficient and why C does not have strings(null
terminated array of charachters) . How much memory is required depends on the
lenght of the string. Try to keep strings out our your UDT's if you have the
need for speed as they will slow down the entire variable. If they do have
strings in them pass them by ref and not by val which will improve the
performance. By val has to make a copy of the variable.

Based on the level of your coding that I have seen I figure that you
probably know all of this but on the off chance...
--
HTH...

Jim Thomlinson


"Vacation's Over" wrote:

> Thanks Jim
>
> With limited processing it's nice to limit processing.
> Now I don't need to think on that one anymore.
>
> "Jim Thomlinson" wrote:
>
> > I am with you on this one. Classes are great for events but otherwise not too
> > handy in Excel. The UDT is a great tool. It has much less overhead than a
> > class. The only draw back is that a UDT can not have methods.
> > --
> > HTH...
> >
> > Jim Thomlinson
> >
> >
> > "Vacation's Over" wrote:
> >
> > > Are there any significant disadvantages to using a user defined type instead
> > > of a class module?
> > >
> > > I know that Classes are more portable but seems that the two are
> > > interchangeable in many instances and it takes less code to use Type. So for
> > > one off solutions I tend to lean towards a user defined type and was just
> > > wondering if there was any big issue I was missing.

OK, so I thought I was trying to be funny with the "With limited processing
it's nice to limit processing." line refering to my figuring out what I
didn't need to think about.

Thanks I'll remember to fully qualify my humor in the future

"Jim Thomlinson" wrote:

> If you look at what the machine is actually doing when it declares an
> integer, or a double or a ... is it is reserving a memory space equivalent to
> an integer. When you retreive the value you just read that much memory. A UDT
> just defines the amount of memory required to hold all of the variables
> defined.
>
> That is why strings are so inefficient and why C does not have strings(null
> terminated array of charachters) . How much memory is required depends on the
> lenght of the string. Try to keep strings out our your UDT's if you have the
> need for speed as they will slow down the entire variable. If they do have
> strings in them pass them by ref and not by val which will improve the
> performance. By val has to make a copy of the variable.
>
> Based on the level of your coding that I have seen I figure that you
> probably know all of this but on the off chance...
> --
> HTH...
>
> Jim Thomlinson
>
>
> "Vacation's Over" wrote:
>
> > Thanks Jim
> >
> > With limited processing it's nice to limit processing.
> > Now I don't need to think on that one anymore.
> >
> > "Jim Thomlinson" wrote:
> >
> > > I am with you on this one. Classes are great for events but otherwise not too
> > > handy in Excel. The UDT is a great tool. It has much less overhead than a
> > > class. The only draw back is that a UDT can not have methods.
> > > --
> > > HTH...
> > >
> > > Jim Thomlinson
> > >
> > >
> > > "Vacation's Over" wrote:
> > >
> > > > Are there any significant disadvantages to using a user defined type instead
> > > > of a class module?
> > > >
> > > > I know that Classes are more portable but seems that the two are
> > > > interchangeable in many instances and it takes less code to use Type. So for
> > > > one off solutions I tend to lean towards a user defined type and was just
> > > > wondering if there was any big issue I was missing.

Don't feel bad.. It gave me the chance to use the phrase "Null terminated
array of charachters". It is a shame to take courses in C if you never get to
say things like that. Now my day is complete... :-)
--
HTH...

Jim Thomlinson


"Vacation's Over" wrote:

> OK, so I thought I was trying to be funny with the "With limited processing
> it's nice to limit processing." line refering to my figuring out what I
> didn't need to think about.
>
> Thanks I'll remember to fully qualify my humor in the future
>
> "Jim Thomlinson" wrote:
>
> > If you look at what the machine is actually doing when it declares an
> > integer, or a double or a ... is it is reserving a memory space equivalent to
> > an integer. When you retreive the value you just read that much memory. A UDT
> > just defines the amount of memory required to hold all of the variables
> > defined.
> >
> > That is why strings are so inefficient and why C does not have strings(null
> > terminated array of charachters) . How much memory is required depends on the
> > lenght of the string. Try to keep strings out our your UDT's if you have the
> > need for speed as they will slow down the entire variable. If they do have
> > strings in them pass them by ref and not by val which will improve the
> > performance. By val has to make a copy of the variable.
> >
> > Based on the level of your coding that I have seen I figure that you
> > probably know all of this but on the off chance...
> > --
> > HTH...
> >
> > Jim Thomlinson
> >
> >
> > "Vacation's Over" wrote:
> >
> > > Thanks Jim
> > >
> > > With limited processing it's nice to limit processing.
> > > Now I don't need to think on that one anymore.
> > >
> > > "Jim Thomlinson" wrote:
> > >
> > > > I am with you on this one. Classes are great for events but otherwise not too
> > > > handy in Excel. The UDT is a great tool. It has much less overhead than a
> > > > class. The only draw back is that a UDT can not have methods.
> > > > --
> > > > HTH...
> > > >
> > > > Jim Thomlinson
> > > >
> > > >
> > > > "Vacation's Over" wrote:
> > > >
> > > > > Are there any significant disadvantages to using a user defined type instead
> > > > > of a class module?
> > > > >
> > > > > I know that Classes are more portable but seems that the two are
> > > > > interchangeable in many instances and it takes less code to use Type. So for
> > > > > one off solutions I tend to lean towards a user defined type and was just
> > > > > wondering if there was any big issue I was missing.