What about extending the current ${!var*} syntax to allow it to
restrict the members to one level? I tried doing this but it didn't
work:
$ compound x=( a=1 b=2 c=3 compound d=( a=1 b=2 compound z=( y=3 )) )
$ echo ${!x.d.[a-z]*}
$ echo ${!x.d.[!.]}
x.d.[!.]
2011/3/22 ольга крыжановская <[email protected]>:
> David, thank you.
>
> Below is a minor modification of your code, which now fills in an
> array instead of using stdout:
> ----cut-here----
> function members
> {
> typeset nval
> typeset -r IFS=$'\n'
> nameref var=$1
> nameref out=$2
>
> typeset -a out
>
> for nval in $(print -v var) ; do
> case "$nval" in
> $'\t\t'*)
> ;;
> *=*)
> nval="${nval%%=*}"
> out+=( "${nval##*[$' \t']}" )
> ;;
> esac
> done
> return 0
> }
[snip]
There's still a problem with this approach:
The use of $ print -v compound_var # does not scale well if
"compound_var" contains lots of data (e.g. 500MB of (nested) variable
tree data) - each time we use $ print -v ... # the whole variable tree
is converted to a string - including the data while we only want the
names of the toplevel compound variable members.
It turns out that there is a much simpler solution using the ${!var*} operator:
-- snip --
$ ksh -c 'compound c=( typeset -a ar=( 4 5 6 [9]=8 ) ; compound cc=(
b=1 ) ) ; printf "%q\n" ${!c.*}'
c.ar
c.cc
c.cc.b
-- snip --
This still prints all sub-variables but at least avoids printing the
values. I'll post a more complete example if I find time later
today...
----
Bye,
Roland
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Regards
Danny
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