Sort a line and Insert sorted word(s) in a line Post: 302696739

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Top Forums Shell Programming and Scripting Sort a line and Insert sorted word(s) in a line Post 302696739 by agama on Wednesday 5th of September 2012 11:05:04 AM

09-05-2012

Registered User

Quote:

Originally Posted by sanjayroc

Hey ! Thanks for your reply. I couldn't get that piece working. how do i find if my awk supports asort. And can you please explain the code ?

I believe that asort() is only available in gawk (GNU awk). Try executing

Code:

awk --version

which might give you the version. Assuming it's not gawk, then you could implement your own sort. Probably not as efficient as the built-in, but better than nothing. Example below using the original code from CarloM and adding a sort (bubble) function.

Code:

awk FS='"' '

# sort v1 into ascending order
# n = length(v1) rather than passing in the length isnt supported in all flavours of awk
function bubble( v1, n,         s, i, pass, swap )
{
    swap = 1;
    pass = 0;

    while( swap )
    {
        swap = 0;
        pass++;
        for( i = 0; i < n - pass; i++ )
        {
            if( v1[i] > v1[i+1] )
            {
                swap++;
                s = v1[i];
                v1[i] = v1[i+1];
                v1[i+1] = s;
            }
        }
    }
}

{
   MYFS="||";
   newlist="";
   n=split($2,elements,MYFS);
   bubble( elements, n );   for (i=1;i<n;i++) {
      newlist=newlist elements[i] MYFS;
   }
   newlist=newlist elements[n];
   $2=newlist;
   print;
}' inputfile

agama

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LEARN ABOUT REDHAT

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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