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Re: Extract the last n characters from a variable


From: Chet Ramey
Subject: Re: Extract the last n characters from a variable
Date: Thu, 21 Dec 2000 10:10:31 -0500

> Configuration Information [Automatically generated, do not change]:
> Machine: i586
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i586' 
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i586-mandrake-linux-gnu' 
> -DCONF_VENDOR='mandrake' -DSHELL -DHAVE_CONFIG_H  -D_FILE_OFFSET_BITS=64  -I. 
> -I/usr/include -I. -I./lib -I/usr/include -O3 -fomit-frame-pointer 
> -fno-exceptions -fno-rtti -pipe -s -mpentium -mcpu=pentium -march=pentium 
> -ffast-math -fexpensive-optimizations
> uname output: Linux bernard.vaissiere-favre.com 2.2.16 #4 mar aoĆ» 22 09:40:00 
> CEST 2000 i686 unknown
> Machine Type: i586-mandrake-linux-gnu
> 
> Bash Version: 2.03
> Patch Level: 19
> Release Status: release
> 
> Description:
>       I need to extract de last 2 characters from a variable.
>       So, I try the syntax : ${varname:-2}. I think that there's a
>       confusion with ${varname:-default_value}. Examples :

Just insert a space:

        ${varname: -2}

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet)

Chet Ramey, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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