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Closing tables using Send operator

awoj

I had assumed the following are equivilent operations:

Close( dt, nosave );<BR />dt << Close( nosave );

But now find myself in a position where they don't produce the same results (the 2nd version using the Send operator doesn't close the table).

What's the difference?

Accepted answers

Melanie_J_Drake

The Close message can be sent to a several JSL objects, but not to data tables.

Data Table doesn't accept the <<Close message at all. If you send this to a "clean" data table (one that is already saved to disk and which has no changes), it also won't close the data table.

dt = open( "$SAMPLE_DATA/Big Class.jmp" );
dt << Close(); // nothing happens

Takeaway: The function Close() and the message <<Close are not the same thing and are not interchangeable.

HTH,

Melanie

All comments

Mark_Bailey

I don't know. Close() has been a function of the data table, not part of a message protocol, since JMP 4 when JSL was first introduced. There are a few cases (only a few) where the same result can be accomplished by a function and sending a message. For example, obtaining a reference to the report layer of a platform p can use Report( p ) or it can use p << Report.