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Case insensitive comparison of strings

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# 1  
Old 03-26-2010
Case insensitive comparison of strings
Hi All,

In one shell script I have

Quote:
case "$i" in
*Nav*)
In variable "i" I am getting a full path of a file. Now I want to compare something like

-- upper(*Nav*))

I dont want to do like below because in each CASE statement I doing so many operations.

Quote:
case "$i" in
*Nav*)
;;
*NAV*)
Please guide me.

Thanks in advance
Vishalaksha
Last edited by vishalaksha; 03-26-2010 at 01:37 AM..
# 2  
Old 03-26-2010
you can use several ways, as

Code:
*Nav*)
*nav*)
;;


or

convert the input to upper case and then use it: TECHPULP | Bash shell script to convert string from lower to upper case and vice versa
# 3  
Old 03-26-2010
Quote:
Originally Posted by vishalaksha
Hi All,

In one shell script I have



In variable "i" I am getting a full path of a file. Now I want to compare something like

-- upper(*Nav*))

I dont want to do like below because in each CASE statement I doing so many operations.


Please guide me.

Thanks in advance
Vishalaksha
Perhaps you could do this
Code:
case "$i" in
*[nN][aA][vV]*)
;;
esac

# 4  
Old 03-27-2010
You can use also "or"
Code:
case "$some" in
   *Nav*|*NAV*|*nav*) ... ;;
# or
    *[nN]av*|*NAV*) ... ;;
# or ...
esac

In ksh you can use typeset
Code:
a="$i"
# set lower (-u = upper)
typeset -l a
case "$a" in
   *nav*) ... ;;
esac

If you are using bash, then
Code:
shopt -s nocasematch
case "$i" in
   *nav*) ... ;;
esac

tr is also solution, but it's not builtin command as previous.
Last edited by kshji; 03-29-2010 at 02:03 AM.. Reason: fix
# 5  
Old 03-29-2010
Thanks Vino and Kshji for providing help.
*[nN][aA][vV]*) is working for me.....
Last edited by vishalaksha; 03-29-2010 at 02:28 AM..
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