On Monday, May 25, 2020 at 12:01:39 PM UTC-7, Robert Prins wrote:   
   > On 2020-05-22 14:30, Tom Del Rosso wrote:   
   > > The objective is to remove everything except digits 0-9 from a string.   
   > >   
   > > %alpha_substrings% does contain all possible non-numeric substrings   
   > > (space separated), so this should remove them and leave only the digits.   
   > >   
   > > set "only_numbers=string"   
   > > for %%t in (%alpha_substrings%) do (   
   > >          call set "only_numbers=%%only_numbers:%%t= %%"   
   > > )   
   > >   
   > > But some characters in the non-numeric substrings, like =, don't get   
   > > removed because they are never included in %%t.   
   > >   
   > > If FOR/F is used then it includes those characters because they are not   
   > > seen as delimiters, but it doesn't spit them out one at a time in   
   > > multiple loops.   
   > >   
   > > I'm tempted to use GWBASIC (MS just made it open-source!).   
   >   
   > If all you have is a hammer, everything looks like a nail!   
   >   
   > Use REXX, available for about every OS, it makes the solution almost trivial.   
   >   
   > Robert   
   > --   
   > Robert AH Prins   
   > robert(a)prino(d)org   
   > The hitchhiking grandfather - https://prino.neocities.org/indez.html   
   > Some REXX code for use on z/OS - https://prino.neocities.org/z   
   S/zOS-Tools.html   
      
   Of course REXX is far superior. I have lots of 'utility' programs that I have   
   written using Regina REXX in Windows. But the point here is to only use what   
   comes 'built-in' with Windows to get the job done.   
      
   Phil Robyn   
   U.C. Berkeley (retired)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)