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1986-05-29
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34 lines
DUP Filter
Command
----------------------------------------------------------------
Purpose: Reads data from the standard input, removes adjacent
duplicated lines, and writes remainder to the standard
output.
Format: DUP [<infile] [>outfile] [?] [/nn]
Type: Internal External
***
Remarks: Duplicate lines must be adjacent to be detected.
Normally, DUP will be used in a pipeline after
SORT, which will bring duplicates together.
If option /nn (where nn is a number) is used, the
comparison is based on only the first nn characters of
each line.
Option ? prints a command summary help message.
DUP requires DOS 2.0, and will abort and print an error
message under earlier versions of DOS.
Author: David Whitman
P.O. Box 1157
North Wales, PA 19454
This program is in the public domain.