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Full Discussion: Bourne-sh (not bash) question about nested loops and sed
Top Forums UNIX for Dummies Questions & Answers Bourne-sh (not bash) question about nested loops and sed Post 302503528 by uiop44 on Thursday 10th of March 2011 09:30:33 PM
Old 03-10-2011
Bourne-sh (not bash) question about nested loops and sed
Here's the input:
Code:
alpha, numeric or alphanumeric string ("line 1 string")
numeric string ("line 2 string")
numeric string ("line 3 string")
numeric string ("line 4 string")
...

where
- each numeric string is in a pattern that can be matched with RE but
- there can be any number of numeric string lines

Here's the desired output:
Code:
line 1 string line 2 string
line 1 string line 3 string
line 1 string line 4 string

The challenge was to do this with sed.

The best I got with sed alone was:
[CODE]
line 1 string line 2 string line 3 string line 4 string
[CODE]
And I had to use tr because my old sed doesn't detect control characters.

Then I tried the shell using this nested loop:
Code:
while read x
do
for i in `sed '2,$p'`
do
echo $x $i
done
done

It works but I get duplicates of lines 2 through the last line.
Last edited by pludi; 03-11-2011 at 03:32 AM..
 

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LEARN ABOUT XFREE86

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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