On Thu, Mar 10, 2011 at 10:22 AM, Jerry Wang <
jerry.j.w...@alcatel-lucent.com> wrote:
> Configuration Information [Automatically generated, do not change]:
> Machine: i486
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i486'
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i486-pc-linux-gnu'
> -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
> -DSHELL -DHAVE_CONFIG_H -I. -I../bash -I../bash/include -I../bash/lib
> -g -O2 -Wall
> uname output: Linux Xubuntu 2.6.31-22-generic #73-Ubuntu SMP Fri Feb 11
> 17:36:01 UTC 2011 i686 GNU/Linux
> Machine Type: i486-pc-linux-gnu
>
> Bash Version: 4.0
> Patch Level: 33
> Release Status: release
>
> Description:
> The case modification won't work with pattern.
> I have a simple script a.sh, please see below:
>
> #! /bin/bash
> var="abcabc"
> echo "var: ${var}"
> echo "replace the leading \"ab\" to uppercase: ${var^ab}" # expect
> to get "ABcabc" ?
> echo "replace all the \"ab\" to uppercase: ${var^^ab}" # expect
> to get "ABcABc" ?
>
>
Case modification does not work the way you expected. It operates on single
chars other than strings.
> echo "replace the first \"a\" to uppercase: ${var^a}"
> echo "replace all \"a\" to uppercase: ${var^^a}"
>
> Then the result is:
>
> mylogin@Xubuntu:~/shell$ ./a.sh
> var: abcabc
> replace the leading "ab" to uppercase: abcabc --> incorrect
> replace all the "ab" to uppercase: abcabc --> incorrect
> replace the first "a" to uppercase: Abcabc --> correct
> replace all "a" to uppercase: AbcAbc --> correct
>
>
> Repeat-By:
>
> --
> Jerry Wang jerry.j.w...@alcatel-lucent.com
>
>
--
Clark J. Wang
