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Full Discussion: help in awk arrays!
Top Forums Shell Programming and Scripting help in awk arrays! Post 302558653 by ctsgnb on Saturday 24th of September 2011 06:33:12 PM
Old 09-24-2011
Quote:
Originally Posted by geli21
---------- Post updated at 08:43 PM ---------- Previous update was at 08:34 PM ----------

I have one question. How does it know that the code below is now for second file?
Code:
 
{for(k=0;++k<=NF;)

and can we deal with more than two files with awk?
1) This is because of the instruction "next", next skip any further code and reprocess next line from the beginning of awk commands

2) yes, awk can deal with more than 2 files, consider the following code :

Code:
$ cat f3
line1
line2
line3
line4
line5

Code:
$ nawk '{print NR,FNR,FILENAME,$0}' f3 f1 f2 f3 f2
1 1 f3 line1
2 2 f3 line2
3 3 f3 line3
4 4 f3 line4
5 5 f3 line5
6 1 f1 Id1 pp1 0t4 pp8 xy2
7 2 f1 Id43 009y black
8 3 f1 Id6 red xy2
9 4 f1 Id12 new pp1 black
10 1 f2 Id pp1 black new pp8
11 1 f3 line1
12 2 f3 line2
13 3 f3 line3
14 4 f3 line4
15 5 f3 line5
16 1 f2 Id pp1 black new pp8

Last edited by ctsgnb; 09-24-2011 at 07:59 PM..
 

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LEARN ABOUT LINUX

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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