Pattern Matching


 
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# 1  
Old 07-13-2011
Pattern Matching

Hello All,

I would like to have your suggestions to find out whether some characters are present in the alphanumeric string.

For example, i have string like 9235793579usa9485 and i want to know how to use KSH pattern matching whether it has any alphabets ( either a-z or A-Z ) in it.
Thanks in advance!
# 2  
Old 07-13-2011
One way:
Code:
var=9235793579usa9485
if [[ "$var" = *[a-zA-Z]* ]]
then
   print "String contains alphabetic characters"
else
   print "No alphabetic character."
fi

Jean-Pierre.
This User Gave Thanks to aigles For This Post:
# 3  
Old 07-13-2011
You could use the case compound command:

Code:
$ LANG=C
$ s=9235793579usa9485                                                                                                       
$ case $s in (*[A-z]*) echo ok;; esac                                                                                    
ok
$

If your shell supports POSIX character classes, you could use [:alpha:].

Consider the following:

Code:
$ s=9235793579
$ case $s in (*[A-z]*) echo ok;; esac
$ zsh -c 's=9235793579; case $s in (*[A-z]*) echo ok;; esac'
$ zsh -c 's=9235793579; case $s in (*[[:alpha:]]*) echo ok;; esac'
ok


Last edited by radoulov; 07-13-2011 at 11:24 AM..
This User Gave Thanks to radoulov For This Post:
# 4  
Old 07-13-2011
it worked. Thanks aigles and radoulov for your quick responses.
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