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case use instead of if else

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# 1  
Old 02-21-2012
case use instead of if else
Hi,
I'm writing a script where the requirement is of the sort
Code:
if echo $x | grep $a > /dev/null
then
COLOR1
elif echo $x | grep $b > /dev/null
then
COLOR2
..
..
fi

I want to replace this with case esac.
color to be changed based on $a $b .... a big list
also $x changes for each line of the file.
Smilie
Last edited by Franklin52; 02-21-2012 at 03:17 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 02-21-2012
Code:
case $x in
*$a*)
  echo a
  ;;
*$b*)
  echo b
  ;;
*$c*)
  echo c
  ;;
*)
  echo default
  ;;
esac

This User Gave Thanks to chihung For This Post:
jagpreetc
# 3  
Old 02-21-2012
Thanks Chihung,

It does work except for the fact which I didn't mention that

$a $b are multiple words | separated.

as grep can be used for searching multiple words
grep "aa|bb|cc" file

in case *$a*, this breaks.
# 4  
Old 02-21-2012
Try and see if this makes a difference:
Code:
case $x in
*"$a"*)
  echo COLOR1
  ;;
*"$b"*)
  echo COLOR2
  ;;
*"$c"*)
  echo COLOR3
  ;;
*)
  echo default
  ;;
esac

Could you post an example of what goes wrong, otherwise?
Last edited by Scrutinizer; 02-21-2012 at 04:24 AM..
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