How to Use OPEN, CLOSE & USE

[Mayur Pawar]

Can any one tell me how to use or write a program to use " Open, Close, Use " commands ?

[ed de moel]

There are brief examples at:
Open: http://71.174.62.16/Demo/AnnoStd?Frame=Main&Page=a108043&Edition=examples
Close: http://71.174.62.16/Demo/AnnoStd?Frame=Main&Page=a108025&Edition=examples
Use: http://71.174.62.16/Demo/AnnoStd?Frame=Main&Page=a108054&Edition=examples

However, since the various deviceparameters are mostly implementation dependent,
it's probably better to refer to the documentation for the implementation you
are using.

Hope this helps,
Ed

[OldMster]

Hopefully you aren't in the same trap I was in when learning M many years ago. I had no other M people to ask, and was coming from a dBase, Basic, Cobal, Fortran, etc. background. I was trying to figure out how to save something to disk - I spent 3 frustrating days with the Open, Use, Write, and Close commands, but all I could find was talk about printers, terminals, etc. Finally as I looked through the 'Cookbook of Mumps', I noticed array references with a caret (^) in front. I thought, nawww, it can't be that easy. So I wrote a for loop 'F I=1:1:100 S ^DOESTHISWORK(I)="LINE "_I', ran it, then shut the machine down. I then restarted the machine, and magically I could do 'F I=1:1:100 W !,I,?5,^DOESTHISWORK(I)', and all that data was there. The light bulb went off at about 1,000 watts in my head, and I remember thinking - AWESOME.

Mark

[Mike]

I had that same experience when learning Mumps! :)

[rms]

[rms]

Which MUMPS are you using -- YottaDB/GT.M, Caché/IRIS/Healthshare, another flavor?
Are you trying to do file IO or something else? If you give more specifics we can perhaps provide more help.