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Top Forums Shell Programming and Scripting Compare Field in Current Line with Field in Previous Post 302612835 by moutaye on Monday 26th of March 2012 11:28:54 AM
Old 03-26-2012
Compare Field in Current Line with Field in Previous

Hi Guys

I have the following file

Quote:
1,A
2,A
3,A
4,B
5,B
6,C
Essentially, I am trying to find the right awk/sed syntax in order to produce the following 3 distinct files from the file above:

Quote:
1,A
2,A
3,A
Quote:
4,B
5,B
Quote:
6,C
Basically, I want to print the lines of the file as long as the second field of the current line is equal to the second field of the previous line. And i want to print them in a file called "second field".txt

Any help appreciated. Thanks.
 

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sact(1) 						      General Commands Manual							   sact(1)

Name
       sact - display current SCCS file editing activity

Syntax
       sact files

Description
       The  command  informs the user of any impending deltas to a named SCCS file.  This situation occurs when the command with the -e option has
       been previously executed without a subsequent execution of the command.	If a directory is named on the command	line,  behaves	as  though
       each file in the directory were specified as a named file, except that non-SCCS files and unreadable files are silently ignored.  If a name
       of - is given, the standard input is read with each line being taken as the name of an SCCS file to be processed.

       The output for each named file consists of five fields separated by spaces.

       Field 1	 Specifies the SID of a delta that currently exists in the SCCS file to which changes will be made to make the new delta.

       Field 2	 Specifies the SID for the new delta to be created.

       Field 3	 Contains the login name of the user who will make the delta (that is, executed a for editing.

       Field 4	 Contains the date that -e was executed.

       Field 5	 Contains the time that -e was executed.

Diagnostics
       See for explanations.

See Also
       delta(1), get(1), sccs(1), sccshelp(1), unget(1), sccsfile(5))
       Guide to the Source Code Control System

																	   sact(1)
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