⎕FDELETE Delete component from a file

The ⎕FDELETE function deletes a component from the file, renumbering the remaining components accordingly. The syntax is:

      ⎕FDELETE TIENO COMPONENT {PASS}

TIENO is the tie number you used to tie or create the file (or the tie number returned by APLX if you tied or created it using 0 instead of your own tie number). If you tied the file using a pass number, you must provide the same pass number, as the PASS parameter.

The parameter COMPONENT is the component number you want to delete. This must be an integer in the range Lowest current component number to Highest existing component number. The component will be deleted, and any later components will be re-numbered so that they remain in integral sequence. For example, suppose the file currently has components numbered 1 to 5. If you delete component 3, then the old components 4 and 5 will be re-numbered 3 and 4 respectively. If you now delete component 1, the remaining components will be re-numbered 1 2 3 (corresponding to the original components 2 4 and 5).

See also the function ⎕FDROP which deletes components at the start or end of the file, but does not re-number the remaining components.