string comparision

Fond_of_Opensource · 11-20-2006, 10:54 PM

Hi friends,

I have a string variable in shell script as :

echo $str
-------------------
Five-time Olympic champion Ian Thorpe retired from competitive swimming on Tuesday at the age of 24, saying breaking records had lost its allure.

---------------

Now I want to check whether the word "from" (case insensitive) exists or not in the above string variable $str. I want to get TRUE or FALSE condition checking.

How to do it in shell script?

Tinkster · 11-21-2006, 02:47 AM

echo $str|grep -i from >/dev/null 2>&1
and check $? afterwards ... 0 is true, 1 is false.

Cheers,
Tink

bikecheng · 11-21-2006, 03:02 AM

using this may be better: echo $test|grep -iE '\<from\>'