Manipulate two queues (Beginning and Intermediate level)
Contributed by: Doug Rickman, Global Hydrology and Climate Center, MSFC, NASA
This is aimed at beginning and intermediate REXX users.
/*****************************************************************************/
/**************************** Queue Control **********************************/
/* Create a named queue, make it active,flush it, then fill it with the */
/* directory list. */
rc=rxqueue('CREATE','DIRLISTQ')
rc=rxqueue('SET','DIRLISTQ')
do while queued()<>0
pull afile
end
'@echo off'
'dir /f 'search||'*.met | rxqueue 'DIRLISTQ /* NOTE USE OF FILTER */
/* create a second named queue to hold the unsorted list */
rc=rxqueue('CREATE','LISTQ')
/* read the directory list and open each file, extra specified data */
/* store raw result in the queue LISTQ */
do while queued()<>0 /* the active list is still DIRLISTQ */
pull afile
i=i+1
/* do something with the information "afile" and output to DataOut.i */
...
DataOut.i=stuff
/* change the active queue and put DataOut.i into ListQ then reset queue */
trash=rxqueue('SET','LISTQ')
queue DataOut.i
trash=rxqueue('SET','DIRLISTQ')
end /* do while queued <> 0 */
/* now look into LISTQ and get the information stored there */
rc=rxqueue('SET','LISTQ')
do while queued()<>0
pull stuff
say stuff
end
/* to read data from the queue without changing case do .... */
Data=linein("QUEUE:")
