Hi Everybody,
 
I thought I had somewhat advanced Excel skills but then the following made 
me feel like I'm back in the beginners' group: Usually people ask here how 
to achieve something in Excel or VBA. I actually have the answer but I 
would like to understand it. This morning, I needed a quick way to scrap 
all non-numeric characters out of the contents of a cell. I wrote a quick 
VBA function that did the job. Then I started to get curious if Excel 
offers any worksheet function that would have done this job for me. I 
learned that this doesn't exist but that the following (data cell is A1 and 
you'd paste this into B2)
 
=IF(A1="","",SUMPRODUCT(MID(0&A1,LARGE(INDEX(ISNUMBER(--MID(A1,ROW($1:$25),1))*ROW($1:$25),0),ROW($1:$25))+1,1)*10^ROW($1:$25)/10))
 
does exactly what I'm trying to do. Granted, it's a bit more complex than a 
VBA macro but I'd still like to understand exactly what this line above 
does. I tried to decipher it but didn't have much success. Can anybody 
enlighten me? Maybe step by step?
 
Thanks in advance. Appreciate all your help I get on this board.
Christoph

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