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Full Discussion: finding first instance
Top Forums UNIX for Dummies Questions & Answers finding first instance Post 26147 by peter.herlihy on Monday 12th of August 2002 07:00:05 PM
Old 08-12-2002
Okay...so if I have this right, basically the same as the original question I asked. This will give you the entire row where col1 and col2 together are unique.

i.e.

a,3,xxx
a,3,yyy
a,4,ccc
a,5,ccc
a,5,fff

Will give you:

a,3,xxx
a,4,ccc
a,5,ccc

Code:
awk ' 
{ 
max=11; 
line=substr($0,0,max) ; 
firstcol=substr(line,0,3) ; 
secondcol=substr(line,5,2); 
thirdcol=substr(line,6,1) 
}
{
if ( firstcol != field1 || secondcol != field2 )
{ print firstcol secondcol thirdcol ; field1 = firstcol; field2 = secondcol }
' input_file > output_file

Basically field1 and field2 start empty get set with the first pariing of col1 and 2 - and prints the 3 cols. Then it compares with the next row and where either are different it prints the three cols.

I haven't tried this code but it hould be good.
 

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LEARN ABOUT OSF1

displayofccc

DisplayOfCCC(3X11)														DisplayOfCCC(3X11)

NAME

       DisplayOfCCC, VisualOfCCC, ScreenNumberOfCCC, ScreenWhitePointOfCCC, ClientWhitePointOfCCC - Color Conversion Context macros

SYNOPSIS

       DisplayOfCCC(ccc)
	       XcmsCCC ccc;

       VisualOfCCC(ccc)
	       XcmsCCC ccc;

       ScreenNumberOfCCC(ccc)
	       XcmsCCC ccc;

       ScreenWhitePointOfCCC(ccc)
	       XcmsCCC ccc;

       ClientWhitePointOfCCC(ccc)
	       XcmsCCC ccc;

ARGUMENTS

       Specifies the CCC.

DESCRIPTION

       The DisplayOfCCC macro returns the display associated with the specified CCC.

       The VisualOfCCC macro returns the visual associated with the specified CCC.

       The ScreenNumberOfCCC macro returns the number of the screen associated with the specified CCC.

       The ScreenWhitePointOfCCC macro returns the screen white point of the screen associated with the specified CCC.

       The ClientWhitePointOfCC macro returns the client white point of the screen associated with the specified CCC.

SEE ALSO

       XcmsCCCofColormap(3X11), XcmsConvertColors(3X11), XcmsCreateCCC(3X11), XcmsDefaultCCC(3X11), XcmsSetWhitePoint(3X11)

       Xlib -- C Language X Interface

																DisplayOfCCC(3X11)
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