awk prints only last line Post: 302969658

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Top Forums Shell Programming and Scripting awk prints only last line Post 302969658 by pilnet101 on Friday 25th of March 2016 08:55:17 AM

03-25-2016

Registered User

Sure,

So this part below will re-evaluate the value of $NF for every line read. The value of $NF being the last field.

Code:

awk '$NF=

For this part, ideally it should be enclosed in brackets. This is what the value of $NF is being set to. It is using the conditional (ternary) operators ?: to set the value of $NF to int($NF) if $NF is already equal to int($NF), so basically if it is already an integer and not a decimal, don't change it. If $NF is not equal to int($NF), i.e. Is a decimal, then set $NF to int($NF)+1. The int function is essentially rounding down the number.

Code:

$NF==int($NF)?int($NF):int($NF)+1'

This will set both the field separator (FS), same as doing - F, and the output field separator (OFS) to a comma.

Code:

OFS=, FS=,

And lastly, awk will perform it's default action of printing the lines it performs the operation on.

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igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)

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