Stripping a string to create a new string

Sherlock · 08-11-2008, 12:08 PM

Hi All,

I have a string

temp="TST_NS_TABL_PS";

I want to create a new string from this stripping "_TBL".

temp1 = "TST_NS_PS";

Hw can i do it...someone suggested sed...but i dont hv much idea abt it..

Iam using Solaris OS

Thanks in advance.

Regards

Mr. C. · 08-11-2008, 12:11 PM

stripped=${temp/_TABL/}

Sherlock · 08-11-2008, 12:16 PM

Quote:

Originally Posted by Mr. C.

stripped=${temp/_TABL/}

hw about the sed command?

And the execution says

temp=${temp/_TABL/}: bad substitution

Mr. C. · 08-11-2008, 12:27 PM

For the future, indicate what shell you are using.

Using sed:

stripped=$(echo $temp | sed 's/_TABL//')

Sherlock · 08-11-2008, 12:33 PM

Quote:

Originally Posted by Mr. C.

For the future, indicate what shell you are using.

Using sed:

stripped=$(echo $temp | sed 's/_TABL//')

Am using bash shell...on Solaris 8.0

matthewg42 · 08-11-2008, 01:24 PM

Using sed will work, and is probably pretty portable to different shells. However, it is not never efficient, so if you are doing the operation many times, the time taken can quickly add up.

Using parameter expansion modifiers is much quicker. See the Parameter Expansion section of the bash manual page for a list of possible expansions which work in bash. A few of these are bash-specific. If you use a different shell, check the relevant part of the manual page for your shell.

Code:

#!/bin/bash
temp1="TST_NS_TABL_PS"
temp2="${temp1/_TABL/}"

echo "temp1=$temp1"
echo "temp2=$temp2"

Sherlock · 08-13-2008, 03:49 AM

Quote:

Originally Posted by matthewg42

Using sed will work, and is probably pretty portable to different shells. However, it is not never efficient, so if you are doing the operation many times, the time taken can quickly add up.

Using parameter expansion modifiers is much quicker. See the Parameter Expansion section of the bash manual page for a list of possible expansions which work in bash. A few of these are bash-specific. If you use a different shell, check the relevant part of the manual page for your shell.

Code:

#!/bin/bash
temp1="TST_NS_TABL_PS"
temp2="${temp1/_TABL/}"

echo "temp1=$temp1"
echo "temp2=$temp2"

Thanks All!!!!!!!!!!

This worked

Code:

stripped=$(echo $temp | sed 's/_TABL//')