topic Re: String manipulation in Operating System - HP-UX

String manipulation

dude70 — Thu, 20 Nov 2003 19:10:21 GMT

Hi

I have a string variable s="manipulate"

I want to extract from pos 2 to 5 . I should get a string "anip" what is the command in ksh.

Thanks.

Re: String manipulation

Brian Markus — Thu, 20 Nov 2003 19:24:19 GMT

#!/bin/sh
s="manipulate"
s1=`expr substr $s 2 4`
echo $s1

Enjoy.. :)

-Brian.

Re: String manipulation

Hein van den Heuvel — Thu, 20 Nov 2003 22:18:33 GMT

Or:

echo "manipulate" | cut -b 2-5

Hein.

Re: String manipulation

Mark Grant — Fri, 21 Nov 2003 01:20:47 GMT

or my favourite (because it works with all shells)

s=`expr "manipulate" : "^.$....$.*"`

Re: String manipulation

RAC_1 — Fri, 21 Nov 2003 01:25:54 GMT

echo "manipulate" | cut -c2-5

Re: String manipulation

Christian Gebhardt — Fri, 21 Nov 2003 01:51:22 GMT

Hi
what's about
--------------------------
s=manipulate
echo $s | awk '{print substr($0,2,4)}'
---------------------------
works also with every shell

Chris

Re: String manipulation

Elmar P. Kolkman — Fri, 21 Nov 2003 02:46:28 GMT

echo $s | cut -c2-5
OR
echo $s | sed 's|^.\$...\$.*$|\\1|'

Re: String manipulation

dude70 — Fri, 21 Nov 2003 10:06:26 GMT

Thank you all guys! It worked!

Re: String manipulation

Rodney Hills — Fri, 21 Nov 2003 10:54:34 GMT

Since you specified ksh, then the following will work for a fixed substring. The benefit of this is that it does not have to start a subshell to run another command (awk, expr, etc...).

s="manipulate"
typeset -L4 a="${s#??}"

s#?? will return "s" with the first 2 characters stripped. typeset -L4 will put that result into "a", but limit the size to 4 characters.

This technique doesn't work if the extract may be variable.

HTH

-- Rod Hills