That's great stuff, and how mainframe methods need to be taught today.
College students understand unix and windows, and need to know the (can
I say odd?) differences they will see on the mainframe, along with a bit
of history.
I'm currently trying to write up some notes for some (possible) new
mainframers who already know unix, and this is one of my comparisons:
Unix Style:
cat /etc/passwd | grep ^ted013: | awk -F':' '{print $3}'
JCL Style:
//CAT EXEC PGM=CAT
//SYSUT1 DD DSN=SYS1.ETC.PASSWD,DISP=SHR
//SYSUT2 DD DSN=&TEMP1,DISP=(NEW,PASS),SPACE=(CYL,(1,1))
//*
//GREP EXEC PGM=GREP
//SYSUT1 DD DSN=&TEMP1,DISP=(OLD,DELETE)
//SYSUT2 DD DSN=&TEMP2,DISP=(NEW,PASS),SPACE=(CYL,(1,1))
//SYSIN DD *
^ted013:
/*
//AWK EXEC PGM=AWK
//SYSUT1 DD DSN=&TEMP2,DISP=(OLD,DELETE)
//SYSUT2 DD SYSOUT=*
//SYSIN DD *
awk -F':' '{print $3}'
/*
Of course we don't normally have MVS programs named CAT/GREP/AWK but I'm
hoping to show how we chain programs together using JCL, and relate that
to unix commands that a student today already knows well. Then I just
have to try and explain why it takes 16 lines of JCL to do the same
thing as one line in unix :)
Ed Gould wrote:
http://destinationz.org/Mainframe-Solution/Trends/What-the-Heck-Is-
JCL-and-Why-Does-It-Look-So-Funny
What the Heck Is JCL and Why Does It Look So Funny?
It’s important to give job control language its due respect helping others
- See more at: http://destinationz.org/Mainframe-Solution/Trends/What-
the-Heck-Is-JCL-and-Why-Does-It-Look-So-Funny#sthash.TRwMFSIg.dpuf
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