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Full Discussion: Replace line in file with line in another file based on matching string
Top Forums Shell Programming and Scripting Replace line in file with line in another file based on matching string Post 302588478 by birei on Monday 9th of January 2012 05:12:10 AM
Old 01-09-2012
Hi luckycharm,

One way using perl:
Code:
$ cat file1
A123, valueA, valueB
B234, valueA, valueB
C345, valueA, valueB
D456, valueA, valueB
E567, valueA, valueB
F678, valueA, valueB
$ cat file2
C345, valueX, valueY
D456, valueX, valueY
$ cat script.pl
use warnings;
use strict;

die qq[Usage: perl $0 <file1> <file2>\n] unless @ARGV == 2;

my %file2_key;

open my $file2, "<", pop @ARGV or die qq[ERROR: Cannot open input file\n];

while ( <$file2> ) {
        my @f = split /\s*,\s*/, $_, 2;
        $file2_key{ $f[0] } = $_;
}

while ( <> ) {
        my @f = split /\s*,\s*/, $_, 2;
        if ( exists $file2_key{ $f[0] } ) {
                print $file2_key{ $f[0] };
                next;
        }

        print;
}
$ perl script.pl file1 file2
A123, valueA, valueB
B234, valueA, valueB
C345, valueX, valueY
D456, valueX, valueY
E567, valueA, valueB
F678, valueA, valueB

Regards,
Birei
 

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LEARN ABOUT MOJAVE

glutessnormal

GLUTESSNORMAL(3G)														 GLUTESSNORMAL(3G)

NAME

       gluTessNormal - specify a normal for a polygon

C SPECIFICATION

       void gluTessNormal( GLUtesselator* tess,
			   GLdouble valueX,
			   GLdouble valueY,
			   GLdouble valueZ )

PARAMETERS

       tess    Specifies the tessellation object (created with gluNewTess).

       valueX  Specifies the first component of the normal.

       valueY  Specifies the second component of the normal.

       valueZ  Specifies the third component of the normal.

DESCRIPTION

       gluTessNormal  describes  a normal for a polygon that the program is defining.  All input data will be projected onto a plane perpendicular
       to one of the three coordinate axes before tessellation and all output triangles will be oriented CCW with respect to the normal (CW orien-
       tation can be obtained by reversing the sign of the supplied normal). For example, if you know that all polygons lie in the x-y plane, call
       gluTessNormal(tess, 0.0, 0.0, 1.0) before rendering any polygons.

       If the supplied normal is (0.0, 0.0, 0.0) (the initial value), the normal is determined as follows. The direction of the normal, up to  its
       sign,  is  found  by  fitting a plane to the vertices, without regard to how the vertices are connected. It is expected that the input data
       lies approximately in the plane; otherwise, projection perpendicular to one of the three coordinate axes may substantially change the geom-
       etry.  The  sign  of the normal is chosen so that the sum of the signed areas of all input contours is nonnegative (where a CCW contour has
       positive area).

       The supplied normal persists until it is changed by another call to gluTessNormal.

SEE ALSO

       gluTessBeginPolygon, gluTessEndPolygon

																 GLUTESSNORMAL(3G)
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