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 DEBIAN

shtool-path

SHTOOL-PATH.TMP(1)					      GNU Portable Shell Tool						SHTOOL-PATH.TMP(1)

NAME

       shtool-path - GNU shtool command dealing with shell path variables

SYNOPSIS

       shtool path [-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename] [-m|--magic] [-p|--path path] str [str ...]

DESCRIPTION

       This command deals with shell $PATH variables. It can find a program through one or more filenames given by one or more str arguments.  It
       prints the absolute filesystem path to the program displayed on "stdout" plus an exit code of 0 if it was really found.

OPTIONS

       The following command line options are available.

       -s, --suppress
	   Supress output. Useful to only test whether a program exists with the help of the return code.

       -r, --reverse
	   Transform a forward path to a subdirectory into a reverse path.

       -d, --dirname
	   Output the directory name of str.

       -b, --basename
	   Output the base name of str.

       -m, --magic
	   Enable advanced magic search for ""perl"" and ""cpp"".

       -p, --path path
	   Search in path. Default is to search in $PATH.

EXAMPLE

	#   shell script
	awk=`shtool path -p "${PATH}:." gawk nawk awk`
	perl=`shtool path -m perl`
	cpp=`shtool path -m cpp`
	revpath=`shtool path -r path/to/subdir`

HISTORY

       The GNU shtool path command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1998 for Apache. It was later taken
       over into GNU shtool.

SEE ALSO

       shtool(1), which(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-PATH.TMP(1)

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