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Full Discussion: Rearrange fields of delimited text file
Top Forums Shell Programming and Scripting Rearrange fields of delimited text file Post 303003109 by Corona688 on Thursday 7th of September 2017 01:50:07 PM
Old 09-07-2017
In that case:

Code:
awk '
function rbefore(STR)   { return(substr(STR, 0, RSTART-1)); }# before match
function rall(STR)      { return(substr(STR, RSTART, RLENGTH)); }# Entire match
function rafter(STR)    { return(substr(STR, RSTART+RLENGTH)); }# after

# First line:  Reformat headers for sorting and find new order
NR==1 {
    for(N=1; N<=NF; N++)
    {
        IN=$N
        OUT=""

        # Convert a_3 to a_00000003 so it will sort
        while(match(IN, /[0-9]+/))
        {
                OUT=OUT rbefore(IN) sprintf("%08d", rall(IN));
                IN=rafter(IN);
        }

        OUT=OUT IN;
        A[OUT]=N # Creating an array of A["string_0001"]=N
    }

    C=asorti(A, B); # Sort it into B[1]="string_0001", B[2]="string_0003" etc
    for(X in B) D[X]=A[B[X]]; # D[1]=4, maps in to out column
}

# All lines: Assemble string from column order and print
{
        OUT=""
        for(N=1; N<=C; N++) OUT=OUT OFS $(D[N])
        print substr(OUT,2);
}

' FS=";" OFS=";" inputfile > outputfile

Also for GNU awk.
This User Gave Thanks to Corona688 For This Post:
andy2000
 

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mac::types

Types(3)						User Contributed Perl Documentation						  Types(3)

NAME

       Mac::Types - Macintosh Toolbox Types and conversions.

DESCRIPTION

       Access to Inside Macintosh is essential for proper use of these functions.  Explanations of terms, processes and procedures are provided
       there.  Any attempt to use these functions without guidance can cause severe errors in your machine, including corruption of data. You have
       been warned.

   Functions
       MacPack [ CONVERTERS ...] CODE, DATA ...
	   Convert a perl value into a Mac toolbox type. Predefined codes are:

	   TEXT
	       Text (an identity operation).

	   enum
	   type
	   keyw
	       A 4-byte string.

	   bool
	       A boolean.

	   shor
	       A short integer.

	   long
	       A long integer.

	   sing
	       A single precision float.

	   doub
	       A double precision float.

	   magn
	       An unsigned long.

	   qdrt
	       A QuickDraw "Rect".

	   'STR '
	       A pascal style string.

	   'STR#'
	       A string list.

	   'fss '
	       A file specification record.

	   You can pass further code mappings as hash references.

       MacUnpack [ CONVERTERS ...] CODE, DATA
	   Convert a Mac toolbox type into a perl value. Predefined codes are as for "MacPack". You can pass further code mappings as hash
	   references.

   XS Functions
       Debugger [ MSG ]
	   Break into MacsBug. Don't use this if you don't know what MacsBug is.

AUTHOR

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perl v5.18.2							    2017-10-06								  Types(3)
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