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This is a Call for Reviewers for a new submission to the newsgroup
"comp.sources.reviewed".  Instructions for responding to this CFR are
included at the end of this message.

	Submission Name: by
	Environment: Unix
	Number of shar parts: 1

                              -----------
                              Description
                              -----------

'By' is a program primarily intended for preprocessing data for
awk and perl.  Processing data in groups means that you take
some actions when encountering the first line of a group (like
resetting counter), or the last line (like printing the sum of a
variable for all the group).
    Using awk or perl usually means that you have to read ahead
one record to see if the current line was the last in a group.
Programming with read ahead is usually cumbersome and error-prone
(e.g. you can't read ahead when reached the last line of the file,
you must keep track of previous values for some processing, and
current values for other...).  'By' preprocesses the data, doing
all the necessary read ahead and indicates the boundaries, making
the postprocessing possible reading just one record at the time, and
'by' indicates when this record is the first or last in the group.



                      ---------------------------
                      Instructions for Responding
                      ---------------------------

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INFORMATION TO PROVIDE:
----------------------

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The parts of the submission will then be mailed to you.


-- 
        Andrew Patrick acting as Comp.Sources.Reviewed Moderator
              Department of Communications, Ottawa, CANADA
                         csr@calvin.dgbt.doc.CA