Hello all!   
      
      
   Some of you batch gurus will be able to point out some   
   pitfalls I've missed, but let me explain first what this is   
   about.   
      
   I email out a little weekly journal newsletter to a group of ham radio folks I   
   work with, our common interest assisting   
   vessels at sea, folks serving their country or faith abroad, etc.   
      
   One thing I've always wanted to implement was a bit of a   
   history section, keyed by date.  These go out on Sunday   
   mornings, of course.   
      
   This batch would run at midnight utc on Sunday of course adn prepare the   
   history information, compiling into it a file   
   that the weekly email generator code would find.   
      
   So, taking this Sunday's for example, the batch would look   
   in a defined directory for files named 0115.txt; 0116.txt; 0117 ... etc.   
      
   Easy enough done, stuff number of month and day into an env   
   var called %NEWS% using HOrst's logecho.   
   OF course I'm using HOrst's nset and count, as well as   
   ifnumber in this thing.   
      
   The first thing we need to do is see if the date's getting   
   toward roll over to next month.   
   That one's easy.  Check if day of the month is 22 or   
   greater.   
      
   IF the date is 22 or greater we then  need to create a   
   "turnover" file which will be used to create another   
   environment variable.   
      
   So here's how we're accomplishing that so far.  the fun   
   comes once we've defined all this.   
   We start the set up for it to do its beautiful work like   
   this:   
      
      
   :: 300hist.bat   
   @echo off   
   :: desc:  This batch is under construction   
   :: desc:  function:  Runs on Sundays 0000 utc or is triggered at that time. ::   
   desc:  helps us grab historic trivia for weekly journal   
   logecho $D | nset starter=$1   
   set checker=22   
   ifnumber %STARTER% biggerequivalthan %CHECKER > nul   
   if errorlevel 1 goto workit   
   :: if starter is bigger or equal to checker we may need to   
   :: turn over to a new month.  IF not, we just cruise along.   
      
      
   set starter=   
   set checker=   
   goto regular   
   :workit   
   set starter=   
   set checker=   
   logecho $M | nset bump=$1   
   :: now we use HOrst's count to add one.   
      
   count BUMP +1   
   set checknum=10   
   :: environment variables are stored ignoring leading zeroes   
   :: unless you stuff them in.  So we set checker to 10 and   
   :: test for smaller than, because if %BUMP% os a somg;e   
   :: digit we need to add a zero.   
   :: we're going to create a file to use to capture   
   :: data for the environment variable at turnover of month.   
   ifnumber %BUMP% smallerthan %CHECKNUM% > nul   
   if errorlevel 1 goto addzero   
   goto doit   
   :addzero   
   set checknum=   
   echo 0%BUMP%01 >> bumper.txt   
   set bump=   
   goto workout   
   :doit   
   set checknum=   
   echo %BUMP%01 >> bumper.txt   
   set bump=   
   goto workout   
   :workout   
   cd \working   
      
      
   :: now we see how many days are in the current month, so   
   :: that we turn over at the appropriate place utilizing the   
   :: file bumper.txt we created to set the new %NEWS%   
   :: env var for the appropriate day's history capture.   
   :: we already have repnum.txt with the data inside.  HEnce:   
   nset repnum=$1 > turnover.txt   
   set repnum=   
   nset turnover=$1