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Top Forums UNIX for Dummies Questions & Answers Can we optimize this simple script ? Post 302276092 by rajavu on Tuesday 13th of January 2009 02:44:11 AM
Old 01-13-2009
Can we optimize this simple script ?

Hi All ,

I am just a new bie in Unix/Linux .

With help of tips from 'here and there' , I just created a simple script to

1. declare one array and some global variables
2. read the schema names from user (user input) and want2proceed flag
3. if user want to proceed , keep reading user input schema name
4. exit the loop if user doesn't want to proceed or it reaches Maximum schema numbers (3)
5 assigns the arrays to global variable only if arrays are not null

Code:
[orcl10gdb@SVRDELLD41 schema_opt]$ cat test_while_array.sh
#declares Array and global variables
declare -a arry
cnt=0
i=0
schema1=""
schema2=""
schema3=""

# Reads schemaname and wanttoproceed flag and exit on reachig maximum schema numbers (3)
echo "Enter Schema Name 1 :"
while read schemaname
do
        arry[cnt]=$schemaname

        echo "Want to procede (y/n) :"
                read wnt2prc
                if [ $wnt2prc = "n" ];
                then
                  break
                fi

        cnt=`expr $cnt + 1`

                if [ $cnt -gt 2 ];
                then
                  echo "Maximum schema number (3) Reached"
                  break
                fi
echo "Enter Schema Name `expr $cnt + 1`:"
done

#Assigns schema names to global variables only if Not Null
if [ -n ${arry[0]} ];
then
        schema1=${arry[0]}
fi

if [ -n ${arry[1]} ];
then
        schema2=${arry[1]}
fi

if [ -n ${arry[2]} ];
then
        schema3=${arry[2]}
fi

#echos then schema name
echo 'schema 1 '$schema1 ${arry[0]}
echo 'schema 2 '$schema2 ${arry[1]}
echo 'schema 3 '$schema3 ${arry[2]}


#while [ $i -lt $cnt ]
#do
#i=`expr $i + 1`
# Calls other sripts with arry as parameter
#done
[orcl10gdb@SVRDELLD41 schema_opt]$ sh test_while_array.sh
Enter Schema Name 1 :
schm1
Want to procede (y/n) :
y
Enter Schema Name 2:
schm2
Want to procede (y/n) :
n
schema 1 schm1 schm1
schema 2 schm2 schm2
schema 3
[orcl10gdb@SVRDELLD41 schema_opt]$

This work fine up to this stage . But wants to know any thing could be done to optimize the script or to make the script compact.

And Now I am planning to call other shell scripts with parameter as array value. Its template is also given in the above script .

The basic questions are , Is there any ..

1. change could be done to optimize the script or to make it compact ?
2. function to change the case of input schema name ?
3. technique to validate user input flag (y/n)
4. make the echo and input in the same line.

Any help is appreciated.
 

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XML::LibXML::Schema(3)					User Contributed Perl Documentation				    XML::LibXML::Schema(3)

NAME
XML::LibXML::Schema - XML Schema Validation SYNOPSIS
use XML::LibXML; $doc = XML::LibXML->new->parse_file($url); $xmlschema = XML::LibXML::Schema->new( location => $filename_or_url ); $xmlschema = XML::LibXML::Schema->new( string => $xmlschemastring ); eval { $xmlschema->validate( $doc ); }; DESCRIPTION
The XML::LibXML::Schema class is a tiny frontend to libxml2's XML Schema implementation. Currently it supports only schema parsing and document validation. As of 2.6.32, libxml2 only supports decimal types up to 24 digits (the standard requires at least 18). METHODS
new $xmlschema = XML::LibXML::Schema->new( location => $filename_or_url ); $xmlschema = XML::LibXML::Schema->new( string => $xmlschemastring ); The constructor of XML::LibXML::Schema may get called with either one of two parameters. The parameter tells the class from which source it should generate a validation schema. It is important, that each schema only have a single source. The location parameter allows to parse a schema from the filesystem or a URL. The string parameter will parse the schema from the given XML string. Note that the constructor will die() if the schema does not meed the constraints of the XML Schema specification. validate eval { $xmlschema->validate( $doc ); }; This function allows to validate a (parsed) document against the given XML Schema. The argument of this function should be a XML::LibXML::Document object. If this function succeeds, it will return 0, otherwise it will die() and report the errors found. Because of this validate() should be always evaluated. AUTHORS
Matt Sergeant, Christian Glahn, Petr Pajas VERSION
1.88 COPYRIGHT
2001-2007, AxKit.com Ltd. 2002-2006, Christian Glahn. 2006-2009, Petr Pajas. perl v5.12.5 2011-09-21 XML::LibXML::Schema(3)
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