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Full Discussion: AWK pattern matching, first and last
Top Forums Shell Programming and Scripting AWK pattern matching, first and last Post 302152948 by ghostdog74 on Saturday 22nd of December 2007 12:25:39 PM
Old 12-22-2007
Code:
awk '
/H##$/{exit}
/#M/,/M#$/ { 
  # assuming Who, When, Why structure 
  # and 3rd field is the "When" column
  if ( $3 ~ /[1-3][1-9]\.[0-1][1-9]\.20[0-1][1-9]/) { 
       lastmod = $3      
  }  
}
/#[PACIDM#]/{ 
    gsub(/#[PACIDM#]|[PACIDM#]#/,"")  
}
/^###*|*\.\.|\/*H|[oO]utputs/{next}
1
END {
  print "Last modified: " lastmod
}
' *code

output:
Code:
# ./test.sh

 Purpose : Creates generation datasets from the original source file

 Author  : D Turpin
 Date    : 1st November 2007

 Inputs  : data.table1
           data.table2


 Who When       Why                                                Version

 DT  01.11.2007 Initial Development                                1.00
 DT  15.11.2007 Modified to include new reqs                       1.01
                and other things

Last modified: 15.11.2007

Last edited by ghostdog74; 12-22-2007 at 09:28 PM..
 

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LEARN ABOUT DEBIAN

clartg

clartg.f(3)							      LAPACK							       clartg.f(3)

NAME

       clartg.f -

SYNOPSIS

   Functions/Subroutines
       subroutine clartg (F, G, CS, SN, R)
	   CLARTG

Function/Subroutine Documentation
   subroutine clartg (complexF, complexG, realCS, complexSN, complexR)
       CLARTG

       Purpose:

	    CLARTG generates a plane rotation so that

	       [  CS  SN  ]	[ F ]	  [ R ]
	       [  __	  ]  .	[   ]  =  [   ]   where CS**2 + |SN|**2 = 1.
	       [ -SN  CS  ]	[ G ]	  [ 0 ]

	    This is a faster version of the BLAS1 routine CROTG, except for
	    the following differences:
	       F and G are unchanged on return.
	       If G=0, then CS=1 and SN=0.
	       If F=0, then CS=0 and SN is chosen so that R is real.

       Parameters:
	   F

		     F is COMPLEX
		     The first component of vector to be rotated.

	   G

		     G is COMPLEX
		     The second component of vector to be rotated.

	   CS

		     CS is REAL
		     The cosine of the rotation.

	   SN

		     SN is COMPLEX
		     The sine of the rotation.

	   R

		     R is COMPLEX
		     The nonzero component of the rotated vector.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Further Details:

	     3-5-96 - Modified with a new algorithm by W. Kahan and J. Demmel

	     This version has a few statements commented out for thread safety
	     (machine parameters are computed on each entry). 10 feb 03, SJH.

       Definition at line 104 of file clartg.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       clartg.f(3)
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