Extract string between <> - Shell Programming and Scripting

rakeshou · #1 11-20-2007

hi,

I want a simple way to extract string between two angle brackets <>

the text looks like

echo "###Usage: $0 <database1> <database2>"

what I want is two variables DB1=database1 and DB2=database2

What I am doing looks clumsy to me

Code:

DB1=`echo $line | sed 's/"//g' | sed 's/>//g' | awk -F"<" '{print $2}'`
DB2=`echo $line | sed 's/"//g' | sed 's/>//g' | awk -F"<" '{print $3}'`

thanks in advance

radoulov · #2 11-20-2007

With bash/ksh93:

Code:

line='###Usage: $0 <database1> <database2>' line=(${line//[<>]})
db1="${line[2]}" db2="${line[3]}"

With zsh:

Code:

line=(${=line//[<>]})
db1="${line[3]}" db2="${line[4]}"

Or:

Code:

db1="${${(m)line%*> <*}#*<}"
db2="${${(m)line#*> <}%?}"

vgersh99 · #3 11-20-2007

Code:

echo "${line}" | nawk -F '(<|>)' '{ printf("DB1=%s;DB2=%s\n", $2, $4)}'

rakeshou · #4 11-20-2007

are there other ways to do it?

Thanks

Franklin52 · #5 11-20-2007

Code:

DB1=`echo $line | sed 's/.*<\(.*\)> <.*/\1/'`

DB2=`echo $line | sed 's/.*> <\(.*\)>"/\1/'`

Regards

vgersh99 · #6 11-20-2007

Quote:

Originally Posted by rakeshou

are there other ways to do it?

Thanks

maybe.... why?

LivinFree · #7 11-20-2007

Eek! Forget sed and awk unless you really need regexp - moderns shells are powerful enough:

Code:

#! /bin/bash

line='echo "###Usage: $0 <database1> <database2>"'

line=${line#*<}
DB1=${line%%>*}

line=${line#*<}
DB2=${line%%>*}

printf "\$DB1=$DB1 \$DB2=$DB2\n"

This works in non-ancient versions of bash and pdksh (don't have AT&T ksh handy, but I'd expect it to work there as well.)

This is faster and more elegant, in my not-so-humble opinion

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
How to Extract string?	namrata5	High Level Programming	2	10-24-2007 12:17 AM
Extract digits at end of string	offirc	Shell Programming and Scripting	6	11-20-2006 08:57 AM
Extract String	sehgalniraj	UNIX for Dummies Questions & Answers	1	09-25-2006 09:35 AM
Extract String	bestbuyernc	Shell Programming and Scripting	5	11-14-2005 12:42 PM
How to extract a portion of a string from the whole string	ds_sastry	UNIX for Dummies Questions & Answers	2	09-29-2001 07:40 AM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode