Should be trivial to do in Perl (I won't provide code), but I always use sed for jobs like these:
$ echo 'A,1,B > > > A,2,B > > > B,3,C > > > B,1_1,A > > > A,2,D > > > C,3_3,B > > > B,2_2,A > > > D,2_2,A' | sed 'N; s/\n/: /' > > A,1,B: A,2,B > > B,3,C: B,1_1,A > > A,2,D: C,3_3,B > > B,2_2,A: D,2_2,A > > On Tue, Jul 12, 2011 at 12:44 AM, Narasimha Madineedi <simha...@gmail.com>wrote: > Hi everyone, > > i have a file contains the following data. > > A,1,B > A,2,B > B,3,C > B,1_1,A > A,2,D > C,3_3,B > B,2_2,A > D,2_2,A > > for example A,1,B its a request message ,corresponding response message > will be B,1_1,A somewhere in the file. > > I have to sort the file in such a manner that after each request message > corresponding response message should follow immediatly. > > can u help me how to resolve this issue? > -- > Regards, > Narasimha Madineedi >
