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Full Discussion: Sorting a specific column!
Top Forums Shell Programming and Scripting Sorting a specific column! Post 302950648 by RudiC on Monday 27th of July 2015 04:11:19 PM
Old 07-27-2015
On top of several syntactical/orthographical errors ($nidlist, $currnid, ), the entire script is way too complicated. Unless there are requirements or conditions not shown, a for loop would handle the situation much better:
Code:
for currid in "$idlist"
  do printf "%s  %d"  $currid $(grep -c $currid path/to/file)
  done | sort -k2 | head -n3

This would have the drawback that it greps through the file n times. Doing the whole thing in e.g. awk could reduce that resource consumption by far.

---------- Post updated at 22:11 ---------- Previous update was at 21:55 ----------

Would this (as a first step, and assuming NO spaces in idlist) satisfy your needs:
Code:
grep -Eo "${idlist//;/|}" file | sort | uniq -c
     5 f34233
     6 x23s52

?
Last edited by RudiC; 07-27-2015 at 05:09 PM..
 

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LEARN ABOUT FREEBSD

slapo-valsort

SLAPO-VALSORT(5)						File Formats Manual						  SLAPO-VALSORT(5)

NAME

       slapo-valsort - Value Sorting overlay to slapd

SYNOPSIS

       /etc/ldap/slapd.conf

DESCRIPTION

       The  Value Sorting overlay can be used with a backend database to sort the values of specific multi-valued attributes within a subtree. The
       sorting occurs whenever the attributes are returned in a search response.

       Sorting can be specified in ascending or descending order, using either numeric or alphanumeric sort methods.  Additionally,  a	"weighted"
       sort  can  be specified, which uses a numeric weight prepended to the attribute values.	The weighted sort is always performed in ascending
       order, but may be combined with the other methods for values that all have equal weights. The weight is specified by prepending an  integer
       weight  {<weight>} in front of each value of the attribute for which weighted sorting is desired. This weighting factor is stripped off and
       never returned in search results.

CONFIGURATION

       These slapd.conf options apply to the Value Sorting overlay.  They should appear after the overlay directive.

       valsort-attr <attribute> <baseDN> (<sort-method> | weighted [<sort-method>])
	      Configure a sorting method for the specified attribute in the subtree rooted at baseDN.  The sort-method may be one of alpha-ascend,
	      alpha-descend, numeric-ascend, or numeric-descend.  If the special weighted method is specified, a secondary sort-method may also be
	      specified. It is an error to specify an alphanumeric sort-method for an attribute with Integer or NumericString syntax, and it is an
	      error to specify a numeric sort-method for an attribute with a syntax other than Integer or NumericString.

EXAMPLES

	    database bdb
	    suffix dc=example,dc=com
	    ...
	    overlay valsort
	    valsort-attr member ou=groups,dc=example,dc=com alpha-ascend

FILES

       /etc/ldap/slapd.conf
	      default slapd configuration file

SEE ALSO

       slapd.conf(5), slapd-config(5).

ACKNOWLEDGEMENTS

       This module was written in 2005 by Howard Chu of Symas Corporation. The work was sponsored by Stanford University.

OpenLDAP							    2012/04/23							  SLAPO-VALSORT(5)
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