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Full Discussion: sorting question
Top Forums UNIX for Dummies Questions & Answers sorting question Post 302136121 by drl on Saturday 15th of September 2007 07:36:47 AM
Old 09-15-2007
Hi.

Here is a brute-force way for this particular situation:
Code:
#!/usr/bin/env bash

# @(#) s1       Demonstrate arbitrary ordering.

set -o nounset
echo

debug="echo"
debug=":"

SEQ=/usr/bin/seq

## Use local command version for the commands in this demonstration.

version bash $SEQ

echo

# 2,5,3,4,1
cat >data1 <<EOF
Expected last.
Expected first.
Expected third.
Expected fourth.
Expected second.
EOF

# See discussion of bash arrays at:
# http://www.tldp.org/LDP/abs/html/arrays.html

oldIFS="$IFS"
IFS="
"
array=( $(cat data1) )
IFS="$oldIFS"

last=$(( ${#array[*]} ))
echo " Input data:"
for i in $( $SEQ 1 $last )
do
  j=$(( i-1 ))
  $debug " printing element $j"
  echo ${array[${j}]}
done

echo
echo " Ordered data:"
for i in 2 5 3 4 1
do
  j=$(( i-1 ))
  $debug " printing element $j"
  echo  "${array[${j}]}"
done

exit 0

Producing:
Code:
% ./s1

GNU bash, version 2.05b.0(1)-release (i386-pc-linux-gnu)
seq (coreutils) 5.2.1

 Input data:
Expected last.
Expected first.
Expected third.
Expected fourth.
Expected second.

 Ordered data:
Expected first.
Expected second.
Expected third.
Expected fourth.
Expected last.

See man pages and tldp reference for details ... cheers, drl
 

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LEARN ABOUT DEBIAN

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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