On 1/12/15 4:29 AM, l_j_f wrote:
> 1. bash version
> -sh-4.3# bash --version
> GNU bash, version 4.3.0(1)-release (arm-hisiv200-linux-gnu)
> Copyright (C) 2013 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software; you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
>
> 2. the script
> #!/bin/bash
>
> main() {
> local i
>
> for ((i=0; i<3; i++)); do
> local var
> if [[ "${i}" == "1" ]]; then
> var=1
> fi
>
> echo i=$i var=$var
> done
> }
>
> main "$@"
>
> 3. the result
> -sh-4.3# ./test3.sh
> i=0 var=
> i=1 var=1
> i=2 var=1
> # I think it should be
> i=0 var=
> i=1 var=1
> i=2 var=
Why? You never unset var or set it to the empty string after it's set to 1.
Shell variables don't have `loop scope'.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU [email protected] http://cnswww.cns.cwru.edu/~chet/
