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Top Forums UNIX for Advanced & Expert Users Alternative to sort -ur +1 required Post 302712493 by Don Cragun on Tuesday 9th of October 2012 08:38:57 AM
Old 10-09-2012
Quote:
Originally Posted by Mike Smith
Tried -k2,2 and it binned loads of old entries which I wanted!

Say I have this data, the highest number (newest) one will always be at the top and I only want to keep the top one as everything right of, and including, column 2 is the same (nothing has changed since last sweep).
1349455502 ygtr-1b:3/1/19 10/100/Gig Ethernet SFP
1349246545 ygtr-1b:3/1/19 10/100/Gig Ethernet SFP

However if we get the following then I want both entries retaining
1349455502 ygtr-1b:3/1/19 10/100/Gig Ethernet SFP
1349246545 ygtr-1b:3/1/19 Old customer name typed in here

-k2,2 seems to ONLY consider column 2 which is no good based on my first post's criteria.

This is tricky!
It isn't tricky at all. You can't say that the first field doesn't matter when throwing away duplicates and at the same time say that you want the highest value for the first field to be the one that is kept when throwing away duplicates. If you care which duplicate is kept, you don't think they are duplicates. If you want both, you have to do it in two separate steps:
  1. sort in reverse order with the data from the start of field 2 to the end of the line as your primary sort key and the numeric value in field 1 as your secondary sort key, and then
  2. on a second pass, discard or ignore the second and subsequent lines that match (including field separators other than the separator between the 1st and 2nd fields) from the start of the 2nd field to the end of the line.

So why does it now matter which timestamp is kept when throwing away duplicates if it didn't matter when you were running this application on Solaris 8?
 

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form_field_new(3CURSES) 				     Curses Library Functions					   form_field_new(3CURSES)

NAME
form_field_new, new_field, dup_field, link_field, free_field - create and destroy forms fields SYNOPSIS
cc [ flag... ] file... -lform -lcurses [ library... ] #include <form.h> FIELD *new_field(int r, int c, int frow, int fcol, int nrow, int ncol); FIELD *dup_field(FIELD *field, int frow, int fcol); FIELD *link_field(FIELD *field, int frow, int fcol); int free_field(FIELD *field); DESCRIPTION
new_field() creates a new field with r rows and c columns, starting at frow, fcol, in the subwindow of a form. nrow is the number of off- screen rows and nbuf is the number of additional working buffers. This routine returns a pointer to the new field. dup_field() duplicates field at the specified location. All field attributes are duplicated, including the current contents of the field buffers. link_field() also duplicates field at the specified location. However, unlike dup_field(), the new field shares the field buffers with the original field. After creation, the attributes of the new field can be changed without affecting the original field. free_field() frees the storage allocated for field. RETURN VALUES
Routines that return pointers return NULL on error. free_field() returns one of the following: E_OK Thefunction returned successfully. E_CONNECTED The field is already connected to a form. E_SYSTEM_ERROR System error. E_BAD_ARGUMENT An argument is incorrect. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
curses(3CURSES), forms(3CURSES), attributes(5) NOTES
The header <form.h> automatically includes the headers <eti.h> and <curses.h>. SunOS 5.11 31 Dec 1996 form_field_new(3CURSES)
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