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Full Discussion: Help with AWK - Compare a field in a file to lookup file and substitute if only a match
Top Forums UNIX for Dummies Questions & Answers Help with AWK - Compare a field in a file to lookup file and substitute if only a match Post 302712119 by migurus on Monday 8th of October 2012 03:46:18 PM
Old 10-08-2012
you would need to add else clause to situation when $3 in a is not found, such as below

Let me reformat the one-liner into a structured form:
Code:
gawk 'BEGIN {FS=OFS="|"}
{
        if(NR==FNR){
                a[$1]=$2;
                next
        }
        if($3 in a){
                $3=a[$3];
                print $0
        }
         else {
                print $0
        }
}'

Last edited by migurus; 10-08-2012 at 04:47 PM.. Reason: typo
 

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GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME

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SYNOPSIS

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DESCRIPTION

       Render Apple .disk_label.

       -b, --bgcolor=COLOR
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