Compare two variables

[ben]

Hello everyone,

is there any way of comparing two different variables and mark the files that are identical?
Maybe the filter panel or data driven categories or something else?

I would like to find all files where {File.DateTime} and {File.Modified} are identical.

Thanks and have a nice sunday afternoon.
Ben

[Mario]

Hm.

This variable returns E when the DateTime and Modified are Equal, else D

{File.DateTime|strcomp:{File.Modified},D,E,D}

You can use this to create a data-driven category. All files will end up either in the E or D child category.

[ben]

Cool, thanks a lot.
Works as it should. Amazing

[sinus]

Cool, thanks a lot.
Works as it should. Amazing

Yes, Variables are cool! 

BTW, ben, do not forget look at the (new since some versions) math-possibilities from variables.
(in the help under: math: Op, Value {,Decimals})
(simply to know, that some basic-maths are possible)

[Mario]

Using variables as the source for data-driven categories can be slow, but at the same time allows to solve many tricky problems.
Another variable expression for this case would be using datecomp:

{File.DateTime|format:YYYY-MM-DD hh:mm:ss;datecomp:eq,{File.Modified|format:YYYY-MM-DD hh:mm:ss},T,F}

This expression compares date and time and returns T if they are identical, else F.
If you are only interested in the date part (ignoring time), you could also use:

{File.DateTime|format:YYYY-MM-DD;datecomp:eq,{File.Modified|format:YYYY-MM-DD},T,F}

[ben]

Very interesting, thanks.
I sometimes use variables and they already helped me quite a few time in the past.
Most of the time I get stuck when trying to connect several variable  expressions.
Like the one in Mario's second post.
I wouldn't know which rules to follow. I know there is a section in the help covering this in a general way, but that didn't help me

[Mario]

It's really simple. You can use a variable almost everywhere you can use a literal value (inside the {} of the outer/starting variable.
The VarToy is a great app to play with variables and try things out.