Progress
Language Reference
FIRST Function
Returns a TRUE value if the current iteration of a DO, FOR EACH, or REPEAT . . . BREAK block is the first iteration of that block.
SYNTAX
break-group
The name of a field or expression you name in the block header with the BREAK BY option.
EXAMPLEThe
r-first.p
procedure displays the order number, order-lines on the order, the extended price of each order-line, and a total order value for each order record.
Because the inner FOR EACH block iterates until Progress reads all the order-lines, the procedure must set the order-value variable to 0 each time a new order is used in that block. The FIRST function uses the (qty * price) expression as the break-group to keep track of whether or not the current iteration is the first iteration of the FOR EACH block.
SEE ALSO
DO Statement, FIRST-OF Function, FOR Statement, LAST Function, LAST-OF Function, REPEAT Statement
Copyright © 2004 Progress Software Corporation www.progress.com Voice: (781) 280-4000 Fax: (781) 280-4095 |