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How to delete X number of rows from end of each table before concatenating them?

I have a large number of CSV files (with same columns but different number of rows) in a folder and would like to concatenate them all. However, I need to delete 5 rows from end of each table before concatenating them. I would appreciate any help with writing the appropriate JSL code to do this job.

ScriptingRe: How to delete X number of rows from end of each table before concatenating them?

Here is a simple script that will concatenate all open data tables after deleting the last 5 rows in each table.

Names Default To Here( 1 );

tableList = {};

For( i = 1, i <= N Table(), i++,
 Data Table( i ) << delete rows(
  Index( N Rows( Data Table( i ) ) - 4, N Rows( Data Table( i ) ) )
 );
 Insert Into( tableList, Data Table( i ) << get name );
);

dt = New Table( "All Tables" );

For( i = 1, i <= N Items( tableList ), i++,
 dt << concatenate( Data Table( tableList[i] ), append to first table( 1 ) )
);