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Full Discussion: $0 manipulation in awk
Top Forums Shell Programming and Scripting $0 manipulation in awk Post 302312211 by vgersh99 on Thursday 30th of April 2009 03:45:18 PM
Old 04-30-2009
I guess I don't follow where the confusion is.
You can change ANY field of the record/line and the $0 be reflected accordingly. And think you code shows that. And no, you don't have to 'force' the $0 reevaluation ($0=$0)- it's done automatically when you change of the fields.
Code:
$ echo "A|B|C|D" | nawk -F'|' '{$2="J"; print $0;print $2}' OFS='|'
A|J|C|D
J

But you can also 'force' to have the $0 reevaluated. For example, if you want to change the 'OFS' programmatically. Every even numbered record/line will have ';' as OFS, and every odd numbered recordline will have '|' as OFS:
Code:
nawk '{OFS=(FNR%2): ";" : "|"; $1=$1; print}' myFile

 

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set_color(1)                                                           fish                                                           set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
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   Description
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